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ES51969
6,600 Counts Auto DMM
Features
* 6,600 counts LCD display * 100L QFP package * 3V DC power supply * Conversion rate : 3 times/s * Full automatic measurement *Voltage measurement: 660.0mV - 1000V *Current measurement: A/mA/A * Auto power off (30min/15min) * Sleep state indicative signal output * Re-power on * On-chip buzzer driver * Low battery detection for 3V or 9V battery
Description
* * * * * * *
ES51969 is an integrated analog-to-digital converter (ADC) with 6,600 counts LCD *Resistance measurement: 660.0 - 66.00M display, automatic range selection, and 3V DC *Capacitance measurement: power supply. Automatic range selection is 6.600nF - 66.00mF(6.6sec) provided for voltage (AC/DC) measurement, *Frequency counter: 660.0Hz - 66.00MHz resistance measurement, current measurement, Current modes for clamp meter with ZERO function capacitance measurement, and frequency Duty cycle measurement: 10.0% - 94.9% (0.66sec) counter. Expensive and bulky mechanical Diode measurement range switches are not required. Other features Continuity check include inrush function, relative value display, 4 ADP modes with external reference voltage and zero feature for DCA clampmeter, VAHZ independent "ADP" segment on LCD panel function, data holding, maximum and Temperature mode with internal scale translation 0 0 minimum value holding, duty cycle circuit from C to F measurement, diode measurement, temperature Push functions: measurement, continuity checking, low battery *KEY function detection, auto power off, re-power on, *Range change function backlight driver, buzzer driver and RS232 data *Inrush function: ACA for clampmeter only *Relative function output.
*Zero function: DCA for clampmeter only *VAHz function *Data hold function *MAX/MIN function *Back light function
* High crest factor signal detection * Band-gap reference voltage output * OL/UL state indicator in ADP modes. * CE selection (DC/AC 1010V, DC/AC 610V) * Serial data output (RS232 format) * LCD segment check when power on v2.6 1 08/10/06
ES51969
6,600 Counts Auto DMM
Application Digital multimeter Clamp meter Thermometer
Pin Assignment
80
75
70
65
60
55
VAHZ MAX/MIN VST OSC2 OSC1 BKOUT R_OVH ENIR ZERO BUZIN OR BUZOUT ANNUNC BP1 BP2 BP3 BP4 SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09 SEG10 SEG11 SEG12 50
10
15
20
v2.6
V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OHMC OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO ADOHZ VRH VR VA+ VAADP
2
25
5
REL HOLD RANGE CESEL BKSET KEY SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9 SDO CC+ VDGND AGND AGND
85
90
Cyrustek. com.tw
45
40
95
ES51969
35
100
SEG14 SEG15 SEG16 SEG17 APOSEL BKLIT DSHIFT RS232 FREQ SLEEP OHMC2 CSHCSH+ CA+ CAR1K R9K VBAR VR1 OHMC1
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6,600 Counts Auto DMM
Pin Description
Pin No
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 v2.6
Symbol
V+ CREF+ CREFCINT CAZ BUFF RAZ IVSH IVSL OVX OHMC OVH OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH ADI ADO ADOHZ VRH VR VA+ VAADP SGND OHMC1 VR1 VBAR R9K R1K CACA+ CSH+ CSHOHMC2 SLEEP FREQ RS232 DSHIFT BKLIT
Type
O I/O I/O O I O O I I I O I I O O O O O I/O O O I O I O I I I I G O I I O O I/O I/O O O O O I I I I
Description
Output of on-chip DC-DC converter. Positive connection for reference capacitor. Negative connection for reference capacitor. Integrator output. Connect to integral capacitor Auto-zero capacitor connection. Buffer output pin. Connect to integral resistor Buffer output pin in high-speed mode. Connect to high-speed integral resistor. High current measurement input. Low current measurement input Input high voltage for resistance measurement Filter capacitor connection for resistance mode below 6.600M range. Output connection for resistance measurement Sense low voltage for resistance measurement Reference resistor connection for 660.0 range Voltage measurement /10000 attenuator(1000V) Voltage measurement /1000 attenuator(660.0V) Voltage measurement /100 attenuator(66.00V) Voltage measurement /10 attenuator(6.600V) Test pin DC signal low input in ACV/ACA mode. Connect to negative output of external AC to DC converter. DC signal high input in ACV/ACA mode. Connect to positive output of external AC to DC converter. Negative input of internal AC to DC OP Amp. Output of internal AC to DC OP Amp. Frequency input under voltage/current mode, offset to AGND. Output of band-gap voltage reference. Typically -1.2V Reference input voltage connection. Typically -400mV For ADP mode. De-integrating voltage positive input. The input should be higher than VA-. For ADP mode. De-integrating voltage negative input. The input should be lower than VA+. Measurement input in ADP mode. Signal Ground. Filter capacitor connection for resistance mode under 660.0K range. Measurement input. In capacitance mode, a compensation capacitor is connected. In temperature mode, it is used to control decimal point. In A or mA modes, pull to V- to disable the `2' or `m2' sign on LCD. Connect to a precise 9K resister. Connect to a precise 1K resister. Negative auto-zero capacitor connection for capacitor measurement Positive auto-zero capacitor connection for capacitor measurement Positive connection to external capacitor. Negative connection to external capacitor. Filter capacitor connection for 6.600M range in resistance mode. Sleep mode indicator, asserts low in SLEEP mode. Frequency counter input, offset V-/2 internally by the chip. Assert low to enable serial data output. Pull to V- to have 0.01M resolution in 66.00M. Pull to DGND or keep it float will change the resolution to 0.1M. Back light function. Pulse low to set BKOUT pin output. 3 08/10/06
ES51969
6,600 Counts Auto DMM
46 APOSEL 47 - 63 SEG17 - SEG01 64 BP4 65 BP3 66 BP2 67 BP1 68 ANNUNC Auto power off idle time selection. LCD segment line 01 - 17 LCD backplane 4 LCD backplane 3 LCD backplane 2 LCD backplane 1 Square wave output at the backplane frequency, synchronized to BP1. ANNUNC can be used to control display annunciator. Connect a LCD segment to ANNUNC to turn it on; connect an LCD segment to its backplane to turn it off. O Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer when BUZIN is low. O OL/UL state indicator in ADP modes. Origin state is low(V-), it goes to high(DGND) only when the reading is over 6,600 counts. It comes back to low only when the reading is less than 600 counts. It will keep the state when the reading is between 600 and 6600 counts. I Pull to V- to enable the BUZOUT. I Pulse to V- to enable ZERO function. I Pull to V- to enable the INRUSH function. I Pull to V- to allow protection resistance increasing at OVH path O If BKLIT function is enabled, this pin will change from -3V to +3V for 60 sec, once press BKLIT pin again within 60 sec, this pin will change back to -3V. I Crystal oscillator input connection O Crystal oscillator output connection I Set to V- to enable the auto range voltage mode to start from 660.0V range. I Pulse to V- to enable MAX/MIN function. I Pulse to V- to enable VAHZ mode. I Pulse to V- to enable Relative function. I Pulse to V- to enable HOLD function. I Pulse to V- to enable manual mode and manual range selection. I CE selection feature control pin. I Set to V- to change the backligh idle time from 60 sec. to 180 sec. I Pulse to V- to change mode. In ADP mode, if this pin is connected to V-, the buzzer output will be off when the ADP input overflows. In ACA modes for Clampmeter (FC5=low), pulse low to V- could enable Inrush function. I Select initial state. Please refer to page 14 I Switch 5 for function selection. I Switch 4 for function selection. I Switch 3 for function selection. I Switch 2 for function selection. I Switch 1 for function selection. I Low battery configuration. If 3V battery is used, connect it to AGND. The default low-battery threshold voltage is -2.3V. If 9V battery is used, the low battery annunciator is displayed when the voltage of this pin is less than VRH (-1.2V) O RS232 compliant serial data output. O Positive capacitor connection for on-chip DC-DC converter. O Negative capacitor connection for on-chip DC-DC converter. P Negative supply voltage. Connecting to battery negative terminal. P/G Digital ground. Connecting to battery positive terminal. P/G Analog ground. I O O O O O O
69 70
BUZOUT OR
71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
BUZIN ZERO ENIR R_OVH BKOUT OSC1 OSC2 VST MAXMIN VAHZ REL HOLD RANGE CESEL BKSET KEY
87 88 89 90 91 92 93
SLACDC FC5 FC4 FC3 FC2 FC1 LBAT9
94 95 96 97 98 99 - 100
SDO C+ CVDGND AGND
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6,600 Counts Auto DMM
Absolute Maximum Ratings
Characteristic Supply Voltage (V- to AGND) Analog Input Voltage V+ AGND/DGND Digital Input Power Dissipation. Flat Package Operating Temperature Storage Temperature
Rating -4V V- -0.6 to V+ +0.6 V+ (AGND/DGND+0.5V) AGND/DGND (V- -0.5V) V- -0.6 to DGND +0.6 500mW 0 to 70 -25 to 125
Electrical Characteristics
TA=25, V- = -3V
Parameter Power supply Operating supply current In DCV mode Voltage roll-over error Voltage nonlinearity Input Leakage Low battery flag voltage Zero input reading Reference voltage and open circuit voltage for 660 measurement Peak to peak backplane drive voltage Counter time base period Open circuit voltage for measurement (except 660) Symbol Test Condition VIDD Normal operation In sleep mode ISS REV 10M input resistor NLV Best case straight line V- to AGND 10M input resistor 100K resistor between VRH and AGND -3.5V V -2.2V fOSC = 4MHZ and Continuity Mode Between V- pin and HOLD, RANGE, KEY, FC1, FC2, FC3, FC4, FC5, BKLIT,MAXMIN Between V- pin and RS232 Between GND Pin and SLACDC 1% 5% 100K resister Between VRH 0VREF
Internal pull-high to 0V current
--
1.2
-- A
--
11 1.5
-- A -- -- -- HZ
Internal pull-low to Vcurrent AC frequency response at 6.600V range Reference voltage temperature coefficient TCRF
-- -- --
40-400 400-2000 50
ppm/
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6,600 Counts Auto DMM
-1.5
2
--
1.5
%F.S
Capacitance measurement accuracy
6.6nF - 66mF -3 -- 3 digits
Note: 1.Full Scale 2.Above specification from 6.6nF to 6.6uF ranges are specified under REL mode.
Function Description 1. Operating Modes
1.1 Voltage Measurement A re-configurable voltage divider automatically provides a suitable range in voltage measurement mode. The following table summarizes the full-scale ranges in each configuration.
Configuration VR1 VR2 VR3 VR4 VR5 Note: 1. 2. 660.0mV range only exists in manual mode If VST is set to V- level, the auto range mode will start from 660.0V range. 660.0mV - 66.00V ranges only exist in manual mode. Full Scale Range 660.0mV1 6.600V 66.00V 660.0V2 1000V Divider Ratio 1 1/10 1/100 1/1000 1/10000 Resister Connection VR1 (10M) VR2 (1.111M) VR3 (101K) VR4 (10K) VR5 (1K)
1.1.2 CE selection ES51969 has a CE selection feature archived by configuring a CESEL pin. If pin CESEL is connected to V-, ES51969 will have a 610.0V overflow level in DC and AC 660.0V ranges. And the 1000V range will not occur anymore. If pin CESEL is connected to DGND or floating, the ES51969 will have a 1010V overflow level in DC 1000V range and have a 1010V overflow level in AC 1000V range. The meter will Show OL when the measuring signal reaches the overflow level. The configuration of CESEL is listed below. CESEL DGND or floating Vv2.6
DCV 1010V 610.0V
6
ACV 1010V 610.0V
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6,600 Counts Auto DMM
1.1.3 HCF signal detection ES51969 provides detection of high-crest-factor (HCF) signal in ACV mode. ES51969 senses the signal and determines it as HCF if the Vpp is large enough. Once the signal is determined as HCF, ES51969 will jump up one measuring range regardless of current measurement value. It takes 60ms to jump one range up. The jumping up process will continue until the maximum range is reached. With HCF detection, a more accurate result could be obtained. For example, when a input signal with Vpp=300V, Vrms=60V(CF=5) was applied, traditional DMMs might stay at 66V range but shows counts with the amount of error up to 10% or even bigger. The error rises from limited input/output swing at internal ADC. With HCF detection, DMM will stay at 660V range and exhibits more accurate results. In addition to accuracy improvement, HCF will speed up the measuring process for high voltage signals. For example, a 1000Vrms is applied, ES51969 will take about 180ms (3 HCF jumps) to enter 1000V range. And it takes 1 or 2 measuring processes to obtain the stable result. Thus a stable LCD reading could be obtained within 1 sec. In determining whether the input signal is HCF, ES51969 senses the signal at VR1 for fast response. However if a signal consists of a small ac part and a large enough dc part, ES51969 might incorrectly treat it as HCF. This could incur range-looping phenomenon, i.e., the measurement could not settle to a specific range. When this phenomenon happens and keeps over 5 seconds, ES51969 will change the UL level to 460 or lower counts (the default UL level is 500 counts in ACV mode). The measurement range will stay at the higher one mostly, so the range-looping phenomenon will not occur again.
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1.1.4 The true RMS-to-DC conversion with ES636 If ES636 is used for true RMS-to-DC measurement, the test circuit is shown in Figure 1. Make ADO and ADI pin short, and keep TEST5 pin float. Connect OVSG pin to AGND through a switch in ACV measurement mode. ACV 99.5 1K 10K 101K 1.111M OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH
-Vs +Vs 5K 4.7u + 4.7u -Vs 1 2 3 4 5 6 7 14 13 12 11 10 100 9 8
4
ES51969
10K +Vs
2 3
7
TL061 N1
1 100K
6 5
N2
ES636
1.5K -Vs 1K +Vs 500K -Vs 1M 0.47u -Vs ADI ADO AGND +Vs 100K ADOHZ
10K
10K 3.3u +
Figure 1. The true RMS-to-DC conversion with ES636
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6,600 Counts Auto DMM
1.2 Resistance Measurement A re-configurable divider automatically provides a suitable full-scale range in resistance measurement mode. The following table summarizes the full-scale ranges and the reference resistors in each configuration. In 66M range, the resolution is 0.1M, if SHIFT is floating or connected to DGND. It will be changed to 0.01M, if DSHIFT is pulled to V-.
Configuration OR1 OR2 OR3 OR4 OR5 OR6 Full Scale Range 660.0 6.600K 66.00K 660.0K 6.600M 66.00M Relative Resistor OR1 VR5 VR4 VR3VR1 VR2VR1 VR1 Equivalent value 100 1K 10K 100K 1M 10M
1.3 Current measurement for multimeter ES51969 has 2 automatic and 1 manual current measurement modes for multimeter. The following table summarizes the full-scale range of each mode. When ES51969 operates in the current measurement modes for multimeter, It takes high input from pin IVSH or IVSL, low input from pin SGND and reference voltage from pin VR.
2 VBAR Mode FC1~4 Full Scale Input Terminal Automatic1 1,1,0,1 1 660.0A / 6600A 3IVSL/IVSH V.S. SGND Automatic2 1,1,1,1 1 66.00mA / 660.0mA 3IVSL/IVSH V.S. SGND Manual 0,0,0,0 X 66.00A IVSH V.S. SGND Note: 1. Connect VBAR to V- will disable the "2" / "m2" symbol on LCD panel, so in the mV range of voltage measurement, this pin must keep floating. 2. The typical connection of input terminal is as the schematic below:
Vin* 9R R
100K 100K
IVSL IVSH
*The voltage results from the current flows through resistors R and 9R. Its input range is up to 3.3Vrms.
1.4 Current measurement for clampmeter ES51969 has 2 automatic and 4 manual current measurement modes for Clampmeter. The following table summarizes the full-scale range of each mode. When ES51969 operate in the automatic mode1&2, it takes high input from IVSH/IVSL (higher range/lower range), low input from SGND and reference voltage from VR. When ES51969 operate in the manual mode1~4, It takes high input from ADP, low input from SGND and reference voltage from VA+ and VA-.
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6,600 Counts Auto DMM
2 VBAR Mode FC1~4 Full Scale Input Terminal Automatic1 1,1,0,1 0 660.0A / 6600A IVSL/IVSH V.S. SGND Automatic2 1,1,1,1 0 66.00A / 660.0A IVSL/IVSH V.S. SGND Manual1 1,1,0,0 X 6.600A ADP V.S. SGND Manual2 1,0,0,0 X 66.00A ADP V.S. SGND Manual3 1,0,1,0 X 660.0A ADP V.S. SGND Manual4 1,0,0,1 X 6600A ADP V.S. SGND Note: 1. Connect VBAR to V- will disable the "2" / "m2" symbol on LCD panel, so in the mV range of voltage measurement, this pin must keep floating. 2. In DC current modes for clampmeter, ES51969 provides Zero function for offset removing. 3. In AC current modes for clampmeter and FC5 is set to low, ES51969 provides an Inrush function to measure the inrush current of a motor when it's starting up. 4. The typical connection of input terminal is as the schematic below:
Vin* RL
9R R
IVSL IVSH
*The voltage results from induced current flows through a load resistor. Its input range is up to 3.3Vrms.
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1.5 Capacitance Measurement The following table summarizes the eight ranges of capacitance measurement mode.
Configuration C1 C2 C3 C4 C5 C6 C7 C8 Note: 1. In order to obtain an accurate reading, a capacitor must be discharged before measurement begins. The chip has a built-in discharge mode to automatically discharge the capacitor. In discharge mode, the LCD displays dIS.C 2. Discharging through the chip is quite slow. We recommend users to discharge the capacitor with some other apparatus. 3. In capacitance mode for clamp-meter (FC1~4={0,1,1,0}, SLACDC=1), the C1~C3 ranges will not occur whatever in the automatic or manual operation. When R_OVH (pin74) is pulled to V- in this mode, the charging current for 660uF-6.6mF is reduced. The 66.00mF range will be omitted. OVH path resistance is allowed to be increased. (For better high voltage protection) Full Scale Range 6.600nF 66.00nF 660.0nF 6.600uF 66.00uF 660.0uF 6.600mF 66.00mF Relative Resistor Measurement Period 0.33 sec VR1 0.33 sec VR2 0.33 sec VR3 0.33 sec VR4 0.66 sec R9K / R1K 1.32 sec R9K / R1K 1.32 sec R9K / R1K 6.60 sec R9K / R1K
. 1.6 Continuity Check Continuity check shares the same configuration with 660.0 manual resistance measurement mode and has buzzer output to indicate continuity. The buzzer generates 2KHz beep whenever the reading is less than 30. When R_OVH (pin74) is pulled to V- in this mode, the buzzer generates 2kHz beep when ever the reading is less than 50. 1.7 Diode Measurement Diode measurement mode shares the same configuration with 6.600V manual voltage measurement mode and has buzzer output to indicate continuity. The buzzer generates a 2KHz sound whenever the reading is less than 30mV. If the test circuit is open or the voltage drop between the two ports of the device(diode) under test is larger than 2V, the LCD panel will show "OL".
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1.8 Frequency counter The time base of the frequency counter is derived from an external crystal oscillator by Tcounter = 4,000,000 Fosc
where Fosc is the frequency of the crystal oscillator. Thus, the counter has a 1-second time base when a 4MHz oscillator is used. The frequency counter can select the proper range automatically or manually. Auto-range operation extends over six decades, from 660.0Hz to 66.00MHz. The following table summarizes the full-scale range of the frequency counter.
Range FR1* FR2 FR3 FR4 FR5 FR6 Full Scale 660.0Hz 6.600KHz 66.00KHz 660.0KHz 6.600MHz 66.00MHz
*If input frequency is less than 10.0Hz, ES51969 will show 00.0Hz.
1.9 Duty cycle measurement In frequency mode, press the VAHZ bottom will force ES51969 enter duty cycle measurement mode. The duty cycle measurement mode takes high input from FREQ pin, and low input from SGND pin. The annunciator "%" on LCD panel indicates whether the duty cycle measurement mode is activated. When the duty cycle is less than 10.0%, the LCD panel shows UL and the UL bit of RS232 data becomes high. When the duty cycle is more than 94.9%, the LCD panel shows OL and the OL bit of RS232 data becomes high. If the frequency of input signal is less than 10.0Hz, the LCD panel also shows UL and the UL bit of RS232 data becomes high. ES51969 also provides a single duty cycle mode, which FC1~FC4 = {1,1,1,0}, as an independent rotary switch for the meters without a frequency mode configured. 1.10 Temperature measurement mode Temperature measurement mode takes input signal from ADP pin and reference voltage from (VA+ - VA-). ES51969 has a built-in C-to-F scale translation circuit, and only needs an external C scale application circuit. The application circuit for F scale is not required. In temperature measurement mode, the default range is 6600 C or F. The VBAR pin is used to control the first decimal point (DP1) on the LCD panel. When VBAR is pulled to V-, DP1 will be turned on and the full scale becomes 660.0 C or F.
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6,600 Counts Auto DMM
1.11 Auto power off and Idle Time selection ES51969 has a default auto power off function. If the meter is idle for more than the given Idle Time, the chip automatically turns the power off. The idle time to trigger the auto power off function is determined by pin `APOSEL'. If pin APOSEL is connected to V-, the Idle Time will be set to 15 minutes. If pin APOSEL is connected to DGND or floating, the Idle Time will be set to 30 minutes. When APO happens, the state of the meter is saved. The APO sign on the LCD panel indicates whether the auto power off is enabled or not. In some cases, user might want to disable Auto power off. There are two ways to disable this feature as following: 1. Power on the meter when any of the push functions, except for HOLD, is pressed down. 2. In addition, when RS232 output is active, the auto power off function is also disabled. Note: Powering on the meter while pressing HOLD and lasts 2 seconds turns on all LCD segments until HOLD is pressed again. 1.12 Sleep The meter enters sleep mode after auto power off. The SLEEP pin asserts low (-3V) in the sleep mode, and asserts high (+3V, not 0V) after re-power on. 1.13 Re-power on After auto power-off, pushing any of the push function or changing the rotary mode can turn on the meter again. If the meter is re-powered on by changing the rotary mode, the saved state is cleared. If the meter is re-powered on by push functions, the chip restores the saved state and enters HOLD mode. The LCD displays the saved value.
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2. Measurement Mode Switching Measurement mode depends on the logic level of SLACDC, FC1, FC2, FC3, FC4, FC5, and KEY. When FC5 is high, the measurement mode list is below.
SLACDC 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 X FC1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 0 0 0 0 0 0 FC2 0 1 1 0 1 1 0 0 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 0 0 1 0 1 1 1 FC3 1 0 1 0 1 0 0 1 0 1 0 1 1 1 0 1 0 1 0 0 0 1 0 1 0 1 1 1 0 0 FC4 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 Mode Voltage Measurement 123 Auto DC Current Measurement(A) 123 Auto DC Current Measurement(mA) 1 66A DC Current Measurement(A) Duty Cycle Measurement 2 Manual DC 6.600A 2 Manual DC 66.00A 2 Manual DC 660.0A 2 Manual DC 6600A Resistance Measurement Continuity Check Resistance Measurement Frequency Measurement Capacitance Measurement Temperature Measurement Voltage Measurement 123 Auto AC Current Measurement(A) 123 Auto AC Current Measurement(mA) 1 66A AC Current Measurement(A) 2 Manual AC 6.600A 2 Manual AC 66.00A 2 Manual AC 660.0A 2 Manual AC 6600A *ADP0 *ADP1 *ADP2 *ADP3 Capacitance Measurement (Clamp) Temperature Measurement Resistance Measurement Function of KEY DCV ACV DCA ACA DCA ACA DCA ACA -- DCA ACA DCA ACA DCA ACA DCA ACA Continuity Continuity Diode Continuity Diode -- -- ACV DCV ACA DCA ACmA DCmA ACA DCA ACA DCA ACA DCA ACA DCA ACA DCA -- -- -- -- -- Diode
X means "don't care". *When FC5 is high, the ADP0, ADP1, ADP2 and ADP3 modes can display minus sign.
1
These modes could be designed for multimeter current modes, please refer to section 1.3. These modes could be designed for clampmeter current modes, please refer to section 1.4. These modes could be designed for clampmeter 2-range automatic voltage modes, please refer to
2
3
section 1.5.
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When FC5 is low, the KEY bottom is used to enable Inrush function in ACA modes for clampmeter. The measurement mode list is below.
SLACDC 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 X FC1 1 1 1 0 1 1 1 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 0 0 0 0 0 0 FC2 0 1 1 0 1 1 0 0 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 0 0 1 0 1 1 1 FC3 1 0 1 0 1 0 0 1 0 1 0 1 1 1 0 1 0 1 0 0 0 1 0 1 0 1 1 1 0 0 FC4 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 1 Mode DC Voltage Measurement 123 Auto DC Current Measurement(A) 123 Auto DC Current Measurement(mA) 1 66A DC Current Measurement(A) Duty Cycle Measurement 2 Manual DC 6.600A 2 Manual DC 66.00A 2 Manual DC 660.0A 2 Manual DC 6600A Resistance Measurement Continuity Check Diode Measurement Frequency Measurement Capacitance Measurement Temperature Measurement () AC Voltage Measurement 123 Auto AC Current Measurement(A) 123 Auto AC Current Measurement(mA) 1 66A AC Current Measurement(A) 2 Manual AC 6.600A 2 Manual AC 66.00A 2 Manual AC 660.0A 2 Manual AC 6600A *ADP0 *ADP1 *ADP2 *ADP3 Capacitance Measurement (Clamp) Temperature Measurement () Resistance Measurement KEY Inrush function4 Inrush function4 Inrush function Inrush function Inrush function Inrush function
X means "don't care". *When FC5 is low, ADP0, ADP1, ADP2 and ADP3 modes can NOT display minus sign.
1 2 3
These modes could be designed for multimeter current modes, please refer to section 1.3. These modes could be designed for clampmeter current modes, please refer to section 1.4. These modes could be designed for clampmeter 2-range automatic voltage modes, please refer to In these modes, inrush function is available only when VBAR is pulled to V-.
section 1.5.
4
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3. Push function All the enabled push functions will be reset when the measurement mode is changed by rotary switch. Change measurement mode by KEY function will reset enabled Range, Hold, Max/Min, REL and Zero functions. The following table lists the available function versus every measurement mode. Function Mode Voltage 2-Range Auto Voltage mode 2 Current Mode for Multimeter 3 Current Mode for Clampmeter Resistance Frequency Duty cycle Capacitance Continuity Diode Temperature Note:
1 2 3
Range O O O O O O X O X X X
Hold O O O O O O O O O O O
Max/Min O O O O O O O O O O O
REL O O O AC O O O O O O O
Zero X X X DC X X X X X X X
VAHz O O O AC X X X X X X X
Inrush X X X AC X X X X X X X
1
Include auto 66.00V/660.0V and auto 660.0V/1000V modes, please refer to section 1.5. Include automatic A, automatic mA and manual 66A modes, please refer to section 1.3. Include 2 automatic modes and 4 manual modes, please refer to section 1.4.
3.1 HOLD HOLD mode makes the meter stop updating the LCD panel. This mode can be nested in most of the special modes. Enabling HOLD function in automatic mode makes the meter switch to manual mode, but the full-scale range remains the same. HOLD function can be cancelled by changing the measurement mode, pressing RANGE, or push HOLD again.
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3.2 Range RANGE pin switches to and from automatic and manual mode, and while in manual mode, changes the full-scale range. The following figure shows the state transition.
1 push < 1 sec
Automatic Mode
1 push > 1 sec
Manual Mode Range up
1 push < 1 sec
Measurement Mode V(DC/AC) Auto 66V/660V (DC/AC) Auto 660V/1000V (DC/AC) Auto A(DC/AC) Auto mA(AC/DC) 66 A(DC/AC) Auto 66A/660A (DC/AC) Auto 660A/6600A (DC/AC) Capacitance Clamp Capacitance (When R_OVH is floating) Clamp Capacitance (When R_OVH is pulled to V-) Continuity Diode Frequency
Auto VR2 - VR5 R1 - R2 R1 - R2 R1 - R2 R1R2 fixed R1R2 R1R2 C1 - C8 C4 - C8 C4 - C7 OR1 - OR6 fixed fixed FR1 - FR6
Manual VRi VRi + 1, VR5 VR1 R1 R2, R2 R1 R1 R2, R2 R1 R1 R2, R2 R1 R1 R2 R2 R1 fixed R1 R2 R2 R1 R1 R2 R2 R1 Ci Ci + 1, C8 C1 Ci Ci + 1, C8 C4 Ci Ci + 1, C7 C4 ORi ORi + 1, OR6 OR1 fixed fixed FRi FRi + 1 FR6 FR1
Control Range 660.0mV - 1000V 66.00V - 660.0V 660.0V - 1000V 660.0A - 6600A 66.00mA - 660.0mA 66.00A 66.00A - 660.0A 660.0A - 6600A 6.600nF- 66.00mF 6.600F - 66.00mF 6.600F - 6.600mF 660.0 - 66.00M 660.0 6.600V 660.0Hz - 66.00MHz
Initial Range 6.600V 66.00V 660.0V 660.0A 66.00mA 66.00A 66.00A 660.0A 6.600nF 6.600F 6.600F 660.0 660.0 6.600V 660.0Hz
Note: Pushing RANGE resets all existing special modes. 3.3 KEY See Section "Measurement Mode Switching" for the function of this pin. In ACA modes for clampmeter, pulse low to V- could enable Inrush Function.
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6,600 Counts Auto DMM
REL + HOLD In REL mode, the LCD panel displays DN+K - DN, where N = 1, 2, 3, ... , DN is the last value before REL is pushed, and DN+K is the current value. The meter returns to normal operation if REL is pressed again. Pressing HOLD in REL mode makes the meter stop updating the LCD panel.
push REL push HOLD
Original State (Auto/Manual)
push REL
RELactive. The relative value
RELandHactive. Hold the relative value
push HOLD
Note: It's possible that the relative value exceeds 6,600 or -6,600 counts, but never exceeds 9,999 or -9,999 counts. Such relative values are displayed. The LCD shows OL in REL mode only if DN or DN+K is more than 6,600 counts or the relative value is more than 9,999. 3.4 Max/Min + HOLD The meter displays the maximum or minimum value of the input in Max/Min mode. When Max/Min is pressed for the first time, the meter displays the maximum value. The meter displays the minimum value, when it is pressed again. When Max/Min is pressed for the third time, the meter displays current value. The meter returns to normal operation if Max/Min is pressed and held for longer than one second. Pressing HOLD in Max/Min mode makes the meter stop updating the maximum or the minimum value.
1 push<1s 1 push>1s
Original state (Automatic/manual) 1 push>1 sec
1 push>1 sec
"MAX" active 1push<1s "MIN" active 1push<1s "Max" "MIN" blink min value current value max value Push HOLD 1push<1s Push HOLD Push HOLD
"MAX""MIN" "H" blink "MIN" "H" active "MAX" "H" active hold max value. 1push<1s hold min value. 1push<1s hold current value. 1push<1s
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3.5 Relative + Max/Min + HOLD Max/Min mode can be nested in REL mode. The meter displays the maximum or minimum value relative to the reference when Max/Min is pressed in REL mode. Pressing HOLD under REL + Max/Min makes the meter stop updating the LCD panel. Original State (Auto/Manual)
Push REL Push REL
RELactive. The relative value
Push Max/Min REL andMaxactive. Push Max/Min > 1s
RELandMinactive. Minimum rel. value
REL Max Min blink. Current rel. value
Maximum rel. value
Push Max/Min Push HOLD
Push Max/Min Push HOLD Push HOLD
REL,Max, Hactive. Hold max. rel. value
REL, Min, Push Max/Min
Hactive. Hold min. rel. value
Push Max/Min Push Max/Min
REL Max , Min , , Hblink. Hold the current rel. value
3.6 INRUSH function ES51969 provides a INRUSH function for AC current measurement for clampmeter to dectect the starting-up current of a motor. Connect pin ENIR to V-, or the INRUSH function will be not available. In ACA modes for clampmeter and the FC5 is set to low, press KEY buttom will force meter to enter INRUSH mode. Then LCD displays "- - - -" until the motor starting up and being detected. The detection will be done only one time and the output reading will be hold. When it done, press KEY could enter INRUSH mode again.To exit INRUSH mode, press KEY buttom more than one second. Enter INRUSH mode in automatic ACA modes will force the range be locked in higher one. The test circuit and flow chart for inrush function is located at next pages. Any change of the component value may have influence on the INRUSH characteristic. So it's not recommended to have any change on these component value. For INRUSH function, an external true RMS-to-DC ES636 IC must be required.
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6,600 Counts Auto DMM
Press KEY>1sec Normal State Press KEY Inrush Mode Detected Inrush Mode "Wait for signal" "LCD shows Reading" Press KEY Flow chart of Inruch function
Vin -Vs +Vs 5K 4.7u + 4.7u -Vs 1 2 3 4 5 6 7 14 13 12 11 10 100 9 8
4
100K -400mV
ADP VAVA+ TEST5 ACVL
ES51969
10K +Vs
2 3
7
TL061 N1
1 100K
6
5
ACVH
N2
ES636
1.5K -Vs 1K +Vs 500K -Vs 1M 0.47u -Vs ADI ADO AGND +Vs 100K ADOHZ
10K
10K 3.3u +
Inrush function test circuit for manual current mode of clampmeter.
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6,600 Counts Auto DMM
Vin* R 4.7u + 200 -Vs 1 2 3 4 5 6 7 14 13 12 11 10 100 9 8 +Vs 9R IVSL
ES51969
IVSH TEST5 ACVL ACVH
*Input full-scale range is up to 3.3V rms. Inrush function test circuit for 2-range automatic current mode of clampmeter 3.7 ZERO function In manual DC 6.600A, 66.00A, 660.0A and 6600A, auto DC 66.00A/660.0A and auto DC 660.0A/6600A mesurement modes, ES51969 provides Zero function to remove the residual current value. Push ZERO bottom less than one second to enter Zero mode. In Zero mode, the LCD panel displays DN+K - DN, where N = 1, 2, 3, ... , DN is the last conversion value before Zero is pushed, and DN+K is the current conversion value. If Zero is pushed again in Zero mode, the meter will refresh the DN value and displays the DN+K - DN again. The meter returns to normal operation if Zero is pressed and held for longer than one second. Pressing HOLD in Zero mode makes the meter stop updating the LCD panel. In 2-range auto DCA modes for clampmeter (660.0A/6600A or 66.00A/660.0A), the system will stay in automatic mode, even if the Zero function is activated. In other words, It could achieve real automatic operation. In automatic mode, Zero function could not be entered from higher range, but it could be still activated if current range is lower one. This is because most residual current value is so small that the range could not be higher one in automatic mode. When enter Zero mode from
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ES636
+Vs 1K +Vs 500K -Vs 1M 0.47u 4.7u -Vs ADI ADO AGND 100K ADOHZ
2.2u +
ES51969
6,600 Counts Auto DMM
lower range, the system will store the nonzero counts (residual current value). If the range goes up to higher one automatically, the nonzero counts will be divided by ten. So this function will still work well in automatic modes. State diagram for Zero mode: Original State Press Zero Press Zero > 1s `Zero' Active Show DN+K - DN State diagram for Zero + HOLD mode: Original State Press Zero Press Zero > 1s `Zero' Active Show DN+K - DN Press Hold `Zero' `Hold' Active Stop LCD upgrading State diagram for Zero + Max/Min + HOLD mode: Original State (Auto/Manual)
Push Zero Push Zero > 1s
Press Zero < 1s
Press Zero < 1s
`Zero' Active Show DN+K - DN
Push Max/Min Push Max/Min > 1s
Push Zero < 1s
`Zero' `Max' Active Show Max. DN+K - DN
Push Max/Min Push HOLD
`Zero' `Min' Active Show Min. DN+K - DN
Zero Max Min blink. Current DN+K - DN
Push Max/Min
Push HOLD
Push HOLD
Zero Max , Min , , `Zero' `Min' `Hold' `Zero' `Max' `Hold' Hblink. Hold the active Hold Min. active Hold Max. Push Max/Min Push Max/Min DN+K - DN Value current DN+K - DN DN+K - DN Value
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6,600 Counts Auto DMM
4. Serial Data Output The RS232 function will be activated if the RS232 pin is pulled to and asserts at V-. The serial data sent to SDO pin once every A/D conversion cycle. The data format complies with JIS 7Bits transmission code with a baud rate of 19230. The host can use RS232 interface to read the data. A single data packet includes a start bit (always 0), 7 data bits, an odd parity check bit, and a stop bit (always 1). The high and low voltage levels correspond to DGND and V- respectively. SDO remains at 1 (high) when it is inactive. Hence the start bit (0) could be used as the triggering signal to begin the reading process. The following figure shows the data format of a single packet. The LSB is sent first and the MSB is sent last. single package
0V -3V
0
LSB
D0 ~D6
p P1
MSB
One data block consists of 11 packets, or 110 bits. The following figure shows the format of a data block. The range packet indicates the full scale range of the meter. Digit 3 through digit 0 are just the digits on the LCD panel. The function packet indicates the measurement mode of the meter. Status, option 1 and option 2 give the status of the meter. CR and LF are delimiters used to separate the blocks. all package
0 range 0 digit1 0 status
p10 digit3 p10 digit0 p10 option1
p10 digit2 p10 function p10 option2
p1
p1
p1
0 CR
v2.6
p10 LF
23
p1
The meter always outputs the current input value to the serial port in spite of HOLD
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6,600 Counts Auto DMM
mode. Each block is repeated twice in one conversion cycle. The detailed data format of each packet is listed below. 4.1 FUNCTUON This packet indicates the measurement mode of the meter. The following table summarizes the transmitted code for each mode. Note that the encoding of this packet is different from the encoding of FC1-FC5 switch.
Code 0111011 3 0111101 3 0111111 0110000 0111001 0110011 0110101 0110001 0110010 0110110 0110100 0111110
1
Measurement Mode Voltage Auto A Current Auto mA Current 66 A current Manual A Current Continuity Diode Frequency Capacitance 2 Temperature 1 ADP/Duty
VBAR=0 Don't care Auto A Current Auto mA Current
VBAR=1 Auto 660.0A/6600A Auto 66.00A/660.0A
Don't care
When the function code = 0111110, the measurement mode is determined by judge bit of Status packet. When the function code = 0110100, the judge bit in the Status packet determines whether the unit is When the function code = 0111101 or 0111111, the measurement mode is determined by VBAR bit of
If judge bit is 1, it means duty cycle mode. If judge bit is 0, it means ADP mode.
2
Celsius or Fahrenheit.
3
OPTION1 packet.
4.2 RANGE This packet indicates the full-scale range of the meter. When the meter operates in continuity mode or diode mode, this packet is always 0110000 since the full-scale ranges in these modes are fixed. The following table lists the code for each range in each measurement mode.
Code V *2-range auto V/A 66 A Manual A ADP Frequency Capacitor 0110000 6.600V Lower Range(IVSL) 66.00 A 6.600A ADP3 660.0 660.0Hz 6.600nF 0110001 66.00V Higher Range(IVSH) 66.00A ADP2 6.600K 66.00nF 0110010 660.0V 660.0A ADP1 66.00K 6.600KHz 660.0nF 0110011 1000V 6600A ADP0 660.0K 66.00KHz 6.600F 0110100 660.0mV 6.600M 660.0KHz 66.00F 0110101 66.00M 6.600MHz 660.0F 0110110 66.00MHz 6.600mF 0110111 66.00mF *It includes auto A, mA, 66.00V/660.0V, 660.0V/1000V, 66.00A/660.0A, 660.0A/6000A. v2.6 24 08/10/06
ES51969
6,600 Counts Auto DMM
4.3 DIGIT 3 - DIGIT 0 Digit 3 is the most significant digit on the LCD panel, and digit 0 is the least significant digit.
Digit 0 1 2 3 4 5 6 7 8 9 Code 0110000 0110001 0110010 0110011 0110100 0110101 0110110 0110111 0111000 0111001
Note: Because the cycle time of measurement for continuity/diode mode is only 82.5ms, the least significant digit may not be accurate 4.4 STATUS The format of this package shown below. In Temperature mode, judge is 1 if the unit is C and is 0 if the unit is F. In ACA modes for clampmeter, the judge bit is 1 when the INRUSH function is activated. Sign field indicates whether the minus sign on the LCD panel is on or off. BATT field is one when battery low condition is true. OL indicates input overflow. In VAHz mode, the judge is 1 if the duty cycle mode is active.
0 BIT6 1 BIT 5 1 BIT 4 Judge BIT 3 Sign BIT 2 BATT BIT1 OL BIT 0
4.5 OPTION 1
0 BIT 6 1 BIT 5 1 BIT 4 UL BIT 3 0 BIT 2 VBAR BIT1 0 BIT 0
The UL bit will be 1 only in following conditions: 1. The reading is less than 10.0Hz(LCD shows UL) in FR1 range of frequency mode. 2. The input frequency is less than 10.0Hz or the duty cycle value is less than 10.0% in duty cycle measurement mode. The VBAR bit will be 1, when the VBAR pin is connected to V-.
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4.6 OPTION 2 This packet contains information on the operation mode of the meter. The format is shown below. The DC field indicates that the meter operates in DC measurement mode, either voltage or current. The AC field indicates that the meter operates in AC measurement mode, either voltage or current. The AUTO field is set to one if the meter operates in automatic mode, and is set to zero when the meter operates in manual mode.
0 BIT 6 1 BIT 5 1 BIT 4 DC BIT 3 AC BIT 2 AUTO BIT 1 VAHZ BIT 0
4.7 CR Carriage return. The transmitted code is 0001101. 4.8 LF Line feed. The transmitted code is 0001010. 5. Miscellaneous The conditions, which the meter turns on the buzzer, include: (1) Changing measurement mode generates one beep. (2) Pressing any of the push functions generates one beep, if the function is valid. (3) Power on and re-power on generate one beep. (4) Input overflow in voltage and current mode generates one beep every 0.3 seconds (or 3.33 beeps per second.) (5) Continuity(diode) check generates a continuous 2KHz beep whenever the measurement is less then 30(30mV) (6) Auto power off generates a 2KHz beep which lasts for 1.5 seconds. The following figures show the output waveform from the BUZOUT pin.
0.5 mS
(a) Continuous 2KHz beep
0.15 sec
0.3 sec
(b) 3.33 beep/sec
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6,600 Counts Auto DMM
5.1 LCD Panel
S17 S1 S2 S3 S4 S5 S6 S9 S7 S8 S15 S10 S11 S12 S16 S13 S14
AUTO MANU HOLD INRUSH REL MAX MIN ZERO BP1 ADP0 APO AC BP2 ADP1 DC BP3 ADP2 BATT BP4 ADP3 RS232 BP1 BP2 BP3 BP4 BP1 BP2 BP3 BP4
%
2 m2 V A n 1 m1 F M K Hz
SEG01 SEG02 SEG03 SEG04 SEG05 SEG06 SEG07 SEG08 SEG09 APO AUTO A4 MANU A3 HOLD INRUSH AC F4 B4 F3 B3 F2 A2 B2 BATT DC E4 G4 E3 G3 E2 G2 C2 RS232 DP3 D4 C4 D3 C3 DP2 D2 DP1 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 A1 F1 E1 D1 B1 G1 C1 % 2 m2 V A M K Hz REL MAX MIN ZERO n 1 m1 F ADP0 ADP1 ADP2 ADP3
LCD Backplane Waveform
V- +3.2 V- +3.1
V-
V-
V- +3.2 V- +3.1
V-
V-
V- +3.2 V- +3.1
VV- +3.2
VV- +3.2
V-
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5.2 LCD display on condition
LCD Annunciator V A F % Hz ADP1 ADP2 ADP3 ADP4 DC AC AUTO MANU HOLD REL Max / Min ZERO INRUSH m1 Condition In voltage measurement mode, and diode measurement mode. In current measurement mode. In resistance measurement mode, and continuity mode. In capacitance measurement mode. In continuity check mode. In diode mode. In duty cycle measurement. In frequency mode. In ADP1 mode In ADP2 mode In ADP3 mode In ADP4 mode In DC voltage or DC current mode. In AC voltage or AC current mode. When automatic full scale range selection is enabled. In manual mode. When HOLD function is enabled. When Relative function is enabled. When Max or Min function is enabled. When ZERO function is enabled. When INRUSH function is enabled. In capacitor measurement mode and the full scale range is in the order of mF. In capacitor measurement mode and the full scale range is in the order of uF. In capacitor measurement mode and the full scale range is in the order of nF. In voltage or current measurement mode and the full scale range is in the order of 10-3. In current measurement mode and the full scale range id in the order of uA. In resistance measurement mode and the full scale range is in the order of M In resistance measurement mode and the full scale range is in the order of K In temperature measurement mode and when the unit is In temperature measurement mode and when the unit is When auto power off function is enabled. When RS232 output is enabled.
1
n m2
2
M K APO RS232
5.3 Operating Timing ES51969 incorporates a dual slope ADC with four phases: ZI, AZ, INT and DINT. The timing of each phase are listed below. *Voltage / Ohm /ADP / Manual Current (for clampmeter) measurement: Phase ZI AZ INT DINT Time 40ms 25ms 100ms 165ms
P.S. In the DC voltage and ohm measurement with auto mode, if the range is changed, the internal clock rate will increase four times and the new measurement cycle becomes 1/4 times of the original cycle until the range is stable. *Current mode for multimeter / Auto Current mode for clampmeter / 2-range auto
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6,600 Counts Auto DMM
voltage mode Phase ZI AZ INT DINT *Continuity/Diode measurement Phase ZI AZ INT DINT *Capacitance measurement: Range 6.600nF 66.00nF 660.0nF 6.600F 66.00F 660.0F 6.600mF 66.00mF Total Measurement Time 0.33sec 0.33sec 0.33sec 0.33sec 0.66sec 1.32sec 1.32sec 6.6sec Time 10ms 6.25ms 25ms 41.25ms Time 40ms 25ms 100ms 82.5ms
*Duty cycle measurement Every conversion takes 0.66 second. *Frequency measurement In 660.0Hz range, the measurement cycle = 0.25 ~ 0.5 sec In range 6.6KHz~66MHz, the measurement cycle = 1.05 sec P.S. In the frequency measurement with auto mode, if the range is changed, the internal clock rate will increase ten times and the new measurement cycle becomes 1/10 times of the original cycle until the range is stable.
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6. Test Circuit
1. Voltage test
AGND OVSG 99.5 1K 10K 101K 1.111M D2 D1 1.0u 15K 10K 15K 0.47u 1.0u 0.1u 88M OR1 VR5 VR4 VR3 VR2 ADO ADI ACVL ACVH TEST5 A mA uA V R 1 10M -400mV Voltage input 100 Z1 6V Z2 PTC 1.5K VR1 10M 47n 300p PTC 1.5K 100 Z1 6V Z2 99.5 1K 10K 101K 1.111M 330n 220n OVX OHMC OHMC1 OHMC2 OVH OVSG OR1 VR5 VR4 VR3 VR2 SGND AGND 0V OVSG 1.111M VR2 V R 450 0.005 0.495 4.5 45 10A mA mA uA uA 100K 100K IVSH IVSL
4. Current test
AGND SGND
10K
5. Diode test
AGND OVH
2. Resistor test
6. Low battery
9V BA TT 270K 680K LBAT9 0.1u AGND V-
3. Current test for clamp meter
7. ADP test
VA+ -400mV VAADP 100K SGND AGND
8. Frequency test
F R E Q
RL
VR R
100K
ADP SGND AGND VA+ VA-
ADPin+ ADPin-
200
2.2u PTC 1.5K Fin
+ Vref v2.6
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6,600 Counts Auto DMM
7. Application Circuit
7.5V ZI + 10 0.1 5.6V ZI 3V + 10 0.1 C+ V0.47 V-
DGND AGND AGND (100)
REL HOLD RANGE CESEL BKSET (85) KEY SLACDC FC5 FC4 FC3 (90) FC2 FC1 LBAT9 SDO C- (95)
A mA 450 45
A A mA 0.1
V+
CREF+
10A
R C
220n 220n mA 450k 4.5 150k 0.495 10A 100K 100K 0.005 100K 47n 300p 1.5K 100 PTC 99.5 1K 10K 101K 10K 1.111M 10K 0.1 1 + D1 15K 1 + 88M D2 0.47
CREFCINT CAZ (5) BUFF RAZ IVSH IVSL OVX (10) OHMC OVH OVSG OR1 VR5 (15) VR4 VR3 VR2 TEST5 ACVL (20) ACVH ADI ADO
15K
ADOHZ 55K 10K 1 + 27K VRH (25) VR VA+ VAADP SGND (30)
(80) VAHZ MAX/MIN VST OSC2 OSC1 (75) BKOUT R_OVH ENIR ZERO BUZIN (70) OR BUZOUT ANNUNC BP1 BP2 (65) BP3 BP4 SEG01 SEG02 SEG03 (60) SEG04 SEG05 SEG06 SEG07 SEG08 (55) SEG09 SEG10 SEG11 SEG12 SEG13
4M
ES51969
220n 100K Cp 9K 200 220n 1K 2.2 1.5K PTC 10M +
5.6V V-
LCD display
...
(50) SEG14 SEG15 SEG16 SEG17 APOSEL (45) BKLIT DSHIFT RS232 FREQ SLEEP (40) OHMC2 CSH- 22n CSH+ CA+ 470n CA(35) R1K R9K
330n
Notes: Fin 1. Most of pins are protected by the ESD protection circuits. However pins, V+, V-, AGND, DGND and VR1 are not protected enough because the parasitic effect must be decrease. Therefore enough external protection is needed for assembling, carrying and keeping. In addition, components connecting to these unprotected pins have to be soldered on board before the chip is soldered. 2. All the zener diodes above are used for IC protection. These protection are needed and these zener diodes must be soldered on PCB first before soldering ES51969 on. 3. Cp is the compensation capacitor for measuring capacitance. Its value depends on the parasitic capacitor on the PCB. (The recommended value is not less than the filter capacitor applied at OVX) 4. The capacitance value marked in red means that these capacitors must have good stability and low leakage current, for example, the MKT type or even better quality ones. v2.6 31 08/10/06
VBAR VR1 OHMC1
V1815
C
ES51969
6,600 Counts Auto DMM
8. Package
1
100 Pin QFP Package
W A
L
b
a
B C D
d
2
Dimension Paramenters
Symbol W L A B C d a D
Min.
Milimeter Typ. Max.
Min.
Mill Typ. 787.4 551.2 16.7 11.8 25.6 47.2 107.1 98.4
Max. 791.3 551.2 11.8 47.2 107.1
19.90 20.00 20.10 783.5 13.90 14.00 14.10 547.2 0.425 0.20 0.30 0.40 7.9 0.65 1.05 1.20 1.35 41.3 2.57 2.72 2.87 101.2 2.50 o 0 10o
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