View ISL21080CIH312Z-TK_4467658.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

(R)
ISL21080
Data Sheet July 28, 2009 FN6934.0
300nA NanoPower Voltage References
The ISL21080 analog voltage references feature low supply voltage operation at ultra-low 310nA typ, 1.5A max operating current. Additionally, the ISL21080 family features guaranteed initial accuracy as low as 0.2% and 50ppm/C temperature coefficient. These references are ideal for general purpose portable applications to extend battery life at lower cost. The ISL21080 is provided in the industry standard 3 Ld SOT-23 pinout. The ISL21080 output voltages can be used as precision voltage sources for voltage monitors, control loops, standby voltages for low power states for DSP, FPGA, Datapath Controllers, microcontrollers and other core voltages: 1.25V, 1.5V, 2.5V, and 3.3V.
Features
* Reference Output Voltage . . .1.25V, 1.5V, 2.500V, 3.300V * Initial Accuracy: 1.5V . . . . . . . . . . . . . . . . . . . . . . . .0.5 % * Input Voltage Range - ISL21080-12 (Coming Soon) . . . . . . . . . . . 2.7V to 5.5V - ISL21080-15 . . . . . . . . . . . . . . . . . . . . . . . . 2.7V to 5.5V - ISL21080-25 (Coming Soon) . . . . . . . . . . . 2.7V to 5.5V - ISL21080-33 (Coming Soon) . . . . . . . . . . . 3.5V to 5.5V * Output Voltage Noise . . . . . . . . . 30VP-P (0.1Hz to 10Hz) * Supply Current . . . . . . . . . . . . . . . . . . . . . . . . 1.5A (Max) * Tempco. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50ppm/C * Output Current Capability. . . . . . . . . . . . . . . . . . . . . 7mA * Operating Temperature Range. . . . . . . . . . -40C to +85C * Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Ld SOT-23
Pinout
ISL21080 (3 LD SOT-23) TOP VIEW
VIN 1 3 VOUT 2 GND
* Pb-Free (RoHS compliant)
Applications
* Energy Harvesting Applications * Wireless Sensor Network Applications * Low Power Voltage Sources for Controllers, FPGA, ASICs or Logic Devices * Battery Management/Monitoring * Low Power Standby Voltages * Portable Instrumentation * Consumer/Medical Electronics * Wearable Electronics * Lower Cost Industrial and Instrumentation * Power Regulation Circuits * Control Loops and Compensation Networks * LED/Diode Supply
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. FGA is a trademark of Intersil Corporation. Copyright Intersil Americas Inc. 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL21080 Ordering Information
PART NUMBER (Note) ISL21080CIH315Z-TK* ISL21080CIH312Z-TK* Coming Soon ISL21080CIH325Z-TK* Coming Soon ISL21080CIH333Z-TK* Coming Soon PART MARKING BCDA BCNA BCRA BCTA VOUT OPTION (V) 1.5 1.25 2.5 3.3 GRADE (%) 0.5 0.6 0.3 0.2 TEMP. RANGE (C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 PACKAGE Tape & Reel (Pb-Free) 3 Ld SOT-23 3 Ld SOT-23 3 Ld SOT-23 3 Ld SOT-23 PKG. DWG. # P3.064 P3.064 P3.064 P3.064
*Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
Pin Descriptions
PIN NUMBER 1 2 3 PIN NAME VIN VOUT GND Input Voltage Connection. Voltage Reference Output Ground Connection DESCRIPTION
2
FN6934.0 July 28, 2009
ISL21080
Absolute Voltage Ratings
Max Voltage VIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +6.5V VOUT to GND (10s) . . . . . . . . . . . . . . . . . . . . -0.5V to VOUT + 1V ESD Rating Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5500V Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500V Charged Device Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .>2kV
Thermal Information
Thermal Resistance (Typical, Note 1) JA (C/W) 3 Ld SOT-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202.70 Continuous Power Dissipation (TA = +85C) . . . . . . . . . . . . . 99mW Storage Temperature Range . . . . . . . . . . . . . . . . . -65C to +150C Pb-free Reflow Profile (Note 2). . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Temperature Range (Industrial) . . . . . . . . . . . . . . . . -40C to +85C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
NOTES: 1. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 2. Post-reflow drift for the ISL21080 devices will range from 100V to 1.0mV based on experimental results with devices on FR4 double sided boards. The design engineer must take this into account when considering the reference voltage after assembly.
Electrical Specifications
PARAMETER VOUT VOA TC VOUT VIN IIN VOUT /VIN VOUT/IOUT
(ISL21080-15, VOUT = 1.5V) VIN = 3.0V, TA = -40C to +85C, IOUT = 0, unless otherwise specified. DESCRIPTION CONDITIONS MIN TYP 1.5 -0.5 +0.5 50 2.7 0.31 2.7 V < VIN < 5.5V Sourcing: 0mA IOUT 7mA Sinking: -7mA IOUT 0mA 80 10 50 50 4 -30 30 52 1.1 100 50 5.5 1.5 250 100 350 MAX UNIT V % ppm/C V A V/V V/mA V/mA mA ms dB VP-P VRMS V/Hz ppm ppm
Output Voltage VOUT Accuracy @ TA = +25C Output Voltage Temperature Coefficient (Note 4) Input Voltage Range Supply Current Line Regulation Load Regulation
ISC tR
Short Circuit Current Turn-on Settling Time Ripple Rejection
TA = +25C, VOUT tied to GND VOUT = 0.1% with no load f = 120Hz 0.1Hz f 10Hz 10Hz f 1kHz f = 1kHz TA = +165C TA = +25C
eN VN
Output Voltage Noise Broadband Voltage Noise Noise Density
VOUT/TA VOUT/t NOTES:
Thermal Hysteresis (Note 5) Long Term Stability (Note 6)
3. Post-assembly x-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. Most inspection equipment will not affect the FGA reference voltage, but if x-ray inspection is required, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred. 4. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the temperature range; in this case, -40C to +85C = +125C. 5. Thermal Hysteresis is the change of VOUT measured @ TA = +25C after temperature cycling over a specified range, TA. VOUT is read initially at TA = +25C for the device under test. The device is temperature cycled and a second VOUT measurement is taken at +25C. The difference between the initial VOUT reading and the second VOUT reading is then expressed in ppm. For TA = +125C, the device under test is cycled from +25C to +85C to -40C to +25C. 6. Long term drift is logarithmic in nature and diminishes over time. Drift after the first 1000 hours will be approximately 10ppm/1khrs.
3
FN6934.0 July 28, 2009
ISL21080 Typical Performance Characteristics Curves
500 UNIT 1 400 UNIT 2 IN (nA) IN (nA) 300 UNIT 3 300 -40C +25C 400 +85C
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified.
500
200
200
100
100
0 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
0
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
FIGURE 1. IIN vs VIN, 3 UNITS
FIGURE 2. IIN vs VIN OVER-TEMPERATURE
1.50020 VOUT (V) (NORMAILIZED TO 1.5V AT VIN = 3V) 1.50015 1.50010 1.50005 1.50000 1.49995 1.49990 1.49985 1.49980 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V) UNIT 3 UNIT 2 UNIT 1 VOUT (V) (NORMALIZED TO VIN = 3.0V)
150 125 100 75 50 25 0 -25 -50 -75 -40C +25C +85C
-100 -125 -150
2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 VIN (V)
FIGURE 3. LINE REGULATION, 3 UNITS
FIGURE 4. LINE REGULATION OVER-TEMPERATURE
1.5005 1.5004 1.5003 1.5002 VOUT (V) 1.5001 UNIT 2
C L = 500pF V IN = 0.3V 50mV/DIV V IN = -0.3V
1.5000 1.4999 1.4998 1.4997 1.4996 1.4995 -40 -30 -20 -10 0 10 20 30 40 VIN (V) 50
UNIT 1 UNIT 3
60 70
80
1ms/DIV
FIGURE 5. VOUT vs TEMPERATURE NORMALIZED to +25C
FIGURE 6. LINE TRANSIENT RESPONSE, WITH CAPACITIVE LOAD
4
FN6934.0 July 28, 2009
ISL21080 Typical Performance Characteristics Curves
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified. (Continued)
900
C L = 0pF V IN = 0.3V
700 500 VOUT (V) 300 100 0 -100 -300 -500
1ms/DIV
+25C
50mV/DIV
-40C +85C
V IN = -0.3V
-7 -6 -5 -4 -3 -2 -1 SINKING
0
1
2
3
4
5
6
7
OUTPUT CURRENT
SOURCING
FIGURE 7. LINE TRANSIENT RESPONSE
FIGURE 8. LOAD REGULATION OVER-TEMPERATURE
500mV/DIV
IL = 7mA
100mV/DIV
IL = 50A
IL = -7mA
IL = -50A
2ms/DIV
1ms/DIV
FIGURE 9. LOAD TRANSIENT RESPONSE
FIGURE 10. LOAD TRANSIENT RESPONSE
1.52 1.50 1.48 VOLTAGE (V) VOUT (V) 1.46 1.44 1.42 1.40 1.38 1.5 7mA LOAD NO LOAD
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 UNIT 3 UNIT 2 0.5 1.0 1.5 2.0 2.5 3.0 TIME (ms) 3.5 4.0 4.5 5.0 VIN UNIT 1
2.0
2.5
3.0
3.5 VIN (V)
4.0
4.5
5.0
5.5
FIGURE 11. DROPOUT
FIGURE 12. TURN-ON TIME
5
FN6934.0 July 28, 2009
ISL21080 Typical Performance Characteristics Curves
160 140 120 PSRR (dB) ZOUT () 100 80 10nF 60 40 20 0 10 100 100nF 1k 10k FREQUENCY (Hz) 100k 1M 1nF NO LOAD
VOUT = 1.5V, VIN = 3.0V, IOUT = 0mA, TA = +25C unless otherwise specified. (Continued)
0 NO LOAD -10 -20 -30 -40 -50 100nF -60 -70 10 100 1k 10k FREQUENCY (Hz) 100k 1M 10nF 1nF
FIGURE 13. ZOUT vs FREQUENCY
FIGURE 14. PSRR vs FREQUENCY
High Current Application
1.502 VIN = 5V 1.500 1.500 1.502 VIN = 5V
VREF (V)
VIN = 3.5V
VREF (V)
1.498
1.498
VIN = 3.5V
1.496 VIN = 3.3V 1.494
1.496 VIN = 3.3V 1.494
1.492
0
5
10
20 ILOAD (mA)
15
25
30
35
1.492
0
5
10
15
20
25
30
35
ILOAD (mA)
FIGURE 15. DIFFERENT VIN AT ROOM TEMPERATURE
FIGURE 16. DIFFERENT VIN AT HIGH TEMPERATURE
Applications Information
FGA Technology
The ISL21080 series of voltage references use the floating gate technology to create references with very low drift and supply current. Essentially, the charge stored on a floating gate cell is set precisely in manufacturing. The reference voltage output itself is a buffered version of the floating gate voltage. The resulting reference device has excellent characteristics which are unique in the industry: very low temperature drift, high initial accuracy, and almost zero supply current. Also, the reference voltage itself is not limited by voltage bandgaps or zener settings, so a wide range of reference voltages can be programmed (standard voltage settings are provided, but customer-specific voltages are available). The process used for these reference devices is a floating gate CMOS process, and the amplifier circuitry uses CMOS transistors for amplifier and output transistor circuitry. While providing excellent accuracy, there are limitations in output noise level and load regulation due to the MOS device
characteristics. These limitations are addressed with circuit techniques discussed in other sections.
Nanopower Operation
Reference devices achieve their highest accuracy when powered up continuously, and after initial stabilization has taken place. This drift can be eliminated by leaving the power on continuously. The ISL21080 is the first high precision voltage reference with ultra low power consumption that makes it possible to leave power on continuously in battery operated circuits. The ISL21080 consumes extremely low supply current due to the proprietary FGA technology. Supply current at room temperature is typically 350nA, which is 1 to 2 orders of magnitude lower than competitive devices. Application circuits using battery power will benefit greatly from having an accurate, stable reference, which essentially presents no load to the battery. In particular, battery powered data converter circuits that would normally require the entire circuit to be disabled when
FN6934.0 July 28, 2009
6
ISL21080
not in use can remain powered up between conversions as shown in Figure 17. Data acquisition circuits providing 12 bits to 24 bits of accuracy can operate with the reference device continuously biased with no power penalty, providing the highest accuracy and lowest possible long term drift. Other reference devices consuming higher supply currents will need to be disabled in between conversions to conserve battery capacity. Absolute accuracy will suffer as the device is biased and requires time to settle to its final value, or, may not actually settle to a final value as power on time may be short. Table 1 shows an example of battery life in years for ISL21080 in various power on condition with 1.5A maximum current consumption.
TABLE 1. EXAMPLE OF BATTERY LIFE IN YEARS FOR ISL21080 IN VARIOUS POWER ON CONDITIONS WITH 1.5A MAX CURRENT BATTERY RATING (mAH) CONTINUOUS 40 225 3 16.3* 50% DUTY CYCLE 6 32.6* 10% DUTY CYCLE 30* 163*
Obviously, mounting the device on flexprint or extremely thin PC material will likewise cause loss of reference accuracy.
+8V TO 28V ISET = VOUT RSET IL = ISET + IRSET
VIN 0.01F
VOUT ZOUT > 100M
RSET 10k 0.1% 10ppm/C
ISL21080-1.5 VOUT = 1.5V GND
ISY ~ 0.31A ISET IL AT 0.1% ACCURACY ~150.3A
FIGURE 18. ISL21080 USED AS A LOW COST PRECISION CURRENT SOURCE
Board Assembly Considerations
FGA references provide high accuracy and low temperature drift but some PC board assembly precautions are necessary. Normal output voltage shifts of 100V to 1mV can be expected with Pb-free reflow profiles. Precautions should be taken to avoid excessive heat or extended exposure to high reflow temperatures, which may reduce device initial accuracy. Post-assembly x-ray inspection may also lead to permanent changes in device output voltage and should be minimized or avoided. If x-ray inspection is required, it is advisable to monitor the reference output voltage to verify excessive shift has not occurred. If large amounts of shift are observed, it is best to add a shield of thin zinc (300m) to allow imaging but block x-rays that affect the FGA reference.
NOTE: *Typical Li-Ion battery has a shelf life of up to 10 years.
VIN = +3.0V
10F VIN
0.01F
VOUT ISL21080 GND 0.001F TO 0.01F REF IN SERIAL BUS ENABLE SCK SDAT 12 TO 24-BIT A/D CONVERTER
Noise Performance and Reduction
The output noise voltage in a 0.1Hz to 10Hz bandwidth is typically 30VP-P. This is shown in the plot in the "Typical Performance Characteristics Curves" which begin on page 4. The noise measurement is made with a bandpass filter made of a 1 pole high-pass filter with a corner frequency at 0.1Hz and a 2-pole low-pass filter with a corner frequency at 12.6Hz to create a filter with a 9.9Hz bandwidth. Noise in the 10kHz to 1MHz bandwidth is approximately 400VP-P with no capacitance on the output, as shown in Figure 19. These noise measurements are made with a 2 decade bandpass filter made of a 1 pole high-pass filter with a corner frequency at 1/10 of the center frequency and 1-pole low-pass filter with a corner frequency at 10 times the center frequency. Figure 19 also shows the noise in the 10kHz to 1MHz band can be reduced to about 50VP-P using a 0.001F capacitor on the output. Noise in the 1kHz to 100kHz band can be further reduced using a 0.1F capacitor on the output, but noise in the 1Hz to 100Hz
FIGURE 17.
ISL21080 Used as a Low Cost Precision Current Source
Using an N-JET and a Nanopower voltage reference, ISL21080, a precision, low cost, high impedance current source can be created. The precision of the current source is largely dependent on the tempco and accuracy of the reference. The current setting resistor contributes less than 20% of the error.
Board Mounting Considerations
For applications requiring the highest accuracy, board mounting location should be reviewed. Placing the device in areas subject to slight twisting can cause degradation of the accuracy of the reference voltage due to die stresses. It is normally best to place the device near the edge of a board, or the shortest side, as the axis of bending is most limited at that location.
7
FN6934.0 July 28, 2009
ISL21080
band increases due to instability of the very low power amplifier with a 0.1F capacitance load. For load capacitances above 0.001F, the noise reduction network shown in Figure 20 is recommended. This network reduces noise significantly over the full bandwidth. As shown in Figure 19, noise is reduced to less than 40VP-P from 1Hz to 1MHz using this network with a 0.01F capacitor and a 2k resistor in series with a 10F capacitor.
400 CL = 0 350 NOISE VOLTAGE (VP-P) 300 250 200 150 100 50 0 1 10 100 1k 10k 100k CL = 0.001F CL = 0.1F CL = 0.01F AND 10F + 2k
Turn-On Time
The ISL21080 devices have ultra-low supply current and thus, the time to bias-up internal circuitry to final values will be longer than with higher power references. Normal turn-on time is typically 7ms. This is shown in Figure 18. Since devices can vary in supply current down to >300nA, turn-on time can last up to about 12ms. Care should be taken in system design to include this delay before measurements or conversions are started.
Temperature Coefficient
The limits stated for temperature coefficient (tempco) are governed by the method of measurement. The overwhelming standard for specifying the temperature drift of a reference, is to measure the reference voltage at two temperatures, take the total variation, (VHIGH - VLOW), and divide by the temperature extremes of measurement (THIGH - TLOW). The result is divided by the nominal reference voltage (at T = +25C) and multiplied by 106 to yield ppm/C. This is the "Box" method for specifying temperature coefficient.
FIGURE 19. NOISE REDUCTION
VIN = 3.0V 10F 0.1F VIN VO ISL21080 GND 0.01F 10F 2k
FIGURE 20. NOISE REDUCTION NETWORK
Typical Application Circuits
VIN = 3.0V R = 200 2N2905
VIN ISL21080 VOUT 0.001F GND 2.5V/50mA
FIGURE 21. PRECISION 2.5V 50mA REFERENCE
8
FN6934.0 July 28, 2009
ISL21080 Typical Application Circuits (Continued)
2.7V TO 5.5V 0.1F 10F
VIN VOUT ISL21080
GND
0.001F VCC RH + VOUT - RL (BUFFERED) VOUT
X9119 SDA 2-WIRE BUS SCL VSS
FIGURE 22. 2.5V FULL SCALE LOW-DRIFT 10-BIT ADJUSTABLE VOLTAGE SOURCE
2.7V TO 5.5V 0.1F 10F
VIN VOUT ISL21080 GND + - LOAD VOUT SENSE
FIGURE 23. KELVIN SENSED LOAD
9
FN6934.0 July 28, 2009
ISL21080 Small Outline Transistor Plastic Packages (SOT23-3)
0.20 (0.008) M C L b C VIEW C
P3.064
3 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE INCHES SYMBOL MIN 0.035 0.001 0.035 0.015 0.012 0.003 0.003 0.110 0.083 0.047 MAX 0.044 0.004 0.037 0.020 0.018 0.007 0.005 0.120 0.104 0.055 MILLIMETERS MIN 0.89 0.013 0.88 0.37 0.30 0.085 0.08 2.80 2.10 1.20 MAX 1.12 0.10 0.94 0.50 0.45 0.18 0.13 3.04 2.64 1.40 NOTES 6 6 3 3 4 5 0.25 8 Rev. 1 11/06 NOTES: 1. Dimensioning and tolerance per ASME Y14.5M-1994. 2. Package conforms to EIAJ SC-74 and JEDEC MO178AB.
6 C L 1
5
4 C L E E1
A A1 A2 b b1
2
3
e e1 D C L C
c c1 D E E1
SEATING PLANE -C-
A
A2
A1
e e1 L
0.0374 Ref 0.0748 Ref 0.016 0.024 Ref 0.010 Ref 3 0.004 0.004 0 0.010 8
0.95 Ref 1.90 Ref 0.21 0.41
0.10 (0.004) C
L1 L2
0.60 Ref 0.25 Ref 3 0.10 0.10 0
WITH PLATING c
b b1 c1
N R R1
a
BASE METAL
4X 1 R1 R GAUGE PLANE SEATING PLANE L C 4X 1 VIEW C L1
3. Dimensions D and E1 are exclusive of mold flash, protrusions, or gate burrs. 4. Footlength L measured at reference to gauge plane. 5. "N" is the number of terminal positions. 6. These Dimensions apply to the flat section of the lead between 0.08mm and 0.15mm from the lead tip. 7. Controlling dimension: MILLIMETER. Converted inch dimensions are for reference only 8. Die is facing up for mold die and trim-form.
L2
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 10
FN6934.0 July 28, 2009

▲Up To Search▲

Price & Availability of ISL21080CIH312Z-TK

	To Download ISL21080CIH312Z-TK Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .