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Philips Semiconductors Linear Products
Product specification
Low power dual voltage comparator
AU2903
DESCRIPTION
The AU2903 consists of two independent precision voltage comparators with an offset voltage specification as low as 2.0mV max. for two comparators which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage. These comparators also have a unique characteristic in that the input common-mode voltage range includes ground, even though operated from a single power supply voltage.
PIN CONFIGURATION
D and N Packages
OUTPUT A INVERTING INPUT A NON-INVERTING INPUT A GND 1 2 3 4 A B 8 7 6 5
V+ OUTPUT B INVERTING INPUT B NON-INVERTING INPUT B
FEATURES
TOP VIEW
* Wide single supply voltage range 2.0VDC to 36VDC or dual * Very low supply current drain (0.8mA) independent of supply * Low input biasing current 25nA * Low input offset current 5nA and offset voltage 2mV * Input common-mode voltage range includes ground * Differential input voltage range equal to the power supply voltage * Low output 250mV at 4mA saturation voltage * Output voltage compatible with TTL, DTL, ECL, MOS and CMOS
logic systems
- INPUT Q8 Q7 Q5 Q6
supplies 1.0VDC, to 18VDC
EQUIVALENT CIRCUIT
V+
voltage (2.0mW/comparator at 5.0VDC)
3.5A
100A
3.5A
100A
Q2
Q3 Q4 OUTPUT
+ INPUT
Q1
APPLICATIONS
* A/D converters * Wide range VCO * MOS clock generator * High voltage logic gate * Multivibrators
ORDERING INFORMATION
DESCRIPTION 8-Pin Plastic Small Outline (SO) Package 8-Pin Plastic Dual In-Line Package (DIP) TEMPERATURE RANGE -40C to +125C -40C to +125C
(1 Comparator Only)
ORDER CODE AU2903D AU2903N
DWG # 0174C 0404B
August 31, 1994
300
853-1636 13721
Philips Semiconductors Linear Products
Product specification
Low power dual voltage comparator
AU2903
ABSOLUTE MAXIMUM RATINGS
SYMBOL VCC VIN PDMAX Supply voltage Differential input voltage Input voltage Maximum power dissipation, TA=25C (still-air)3 N package D package Output short-circuit to IIN TA TSTG TSOLD ground1 Input current (VIN<-0.3VDC)2 Operating temperature range AU2903 Storage temperature range Lead soldering temperature (10sec max) -40 to +125 -65 to +150 300 C C C 1160 780 Continuous 50 mA mW mW PARAMETER RATING 36 or 18 36 -0.3 to +36 UNIT VDC VDC VDC
NOTES: 1. Short circuits from the output to V+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20mA independent of the magnitude of V+. 2. This input current will only exist when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistors becoming forward biased and thereby acting as input diode clamps. In addition to this diode action, there is also lateral NPN parasitic transistor action on the IC chip. This transistor action can cause the output voltages of the comparators to go to the V+ voltage level (or to ground for a large overdrive) for the time duration that an input is driven negative. This is not destructive and normal output states will re-establish when the input voltage, which was negative, again returns to a value greater than -0.3VDC. 3. Derate above 25C, at the following rates: N package at 9.3mW/C D package at 6.2mW/C
August 31, 1994
301
Philips Semiconductors Linear Products
Product specification
Low power dual voltage comparator
AU2903
DC AND AC ELECTRICAL CHARACTERISTICS
V+=5VDC, AU2903; -40C, TA +125C, unless otherwise specified. SYMBOL VOS VCM VIDR PARAMETER Input offset voltage2 Input common-mode voltage range3, 6 Differential input voltage1 TEST CONDITIONS TA = 25C Over temp. TA = 25C Over temp. Keep all VINs 0VDC (or V- if need) IIN(+) or IIN(-) with output in linear range TA=25C Over temp. IIN(+) - IIN(-) TA = 25C Over temp. VIN(-) 1VDC, VIN(+) = 0, V0 1.5VDC TA = 25C VIN(+) 1VDC, VIN(-) = 0 V0 = 5VDC, TA = 25C V0 = 30VDC, over temp. RL = on both comparators. ICC Supply current TA = 25C V+ = 30V, over temp. AV Voltage gain RL 15k, V+ = 15VDC, TA = 25C VIN(-) 1VDC, VIN(+) = 0, VOL Saturation voltage ISINK 4mA TA = 25C Over temp. Large-signal response time VIN = TTL logic swing, VREF = 1.4VDC VRL = 5VDC, RL = 5.1k, TA = 25C VRL = 5VDC, RL = 5.1k TA = 25C 400 400 700 mV 25 0.8 1 100 1 2.5 V/mV mA 6.0 0 0 AU2903 Min Typ 2.0 9 Max 7.0 15 V+-1.5 V+-2.0 V+ UNIT mV V V
IBIAS
Input bias current4
25 200 5 50 16
250 500 50 200
nA
IOS
Input offset current
nA nA mA
IOL
Output sink current
IOH
Output leakage current
0.1 1.0
nA A
tLSR
300
ns
tR
Response time5
1.3
s
NOTES: 1. Positive excursions of input voltage may exceed the power supply level by 17V. As long as the other voltage remains within the common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than -0.3VDC (VDC below the magnitude of the negative power supply, if used). 2. At output switch point, VO 1.4VDC, RS = 0 with V+ from 5VDC to 30VDC and over the full input common-mode range (0VDC to V+-1.5VDC). 3. The input common-mode voltage or either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is V+-1.5V, but either or both inputs can go to 30VDC without damage. 4. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the output so no loading change exists on the reference or input lines. 5. The response time specified is for a 100mV input step with a 5mV overdrive. 6. For input signals that exceed VCC, only the over-driven comparator is affected. With a 5V supply, VIN should be limited to 25V maximum, and a limiting resistor should be used on all inputs that might exceed the positive supply.
August 31, 1994
302
Philips Semiconductors Linear Products
Product specification
Low power dual voltage comparator
AU2903
TYPICAL APPLICATIONS
V+ 700k 100k V+
+ VC FREQUENCY CONTROL VOLTAGE INPUT
50k
-
10
500pF
30k 5.1k
3.0k
- +
.01F V - /2 OUTPUT 1
0.1F 20k 20k V + /2
+
OUTPUT 2
+ -
NOTES: V+ = 30VDC + 250m VDC < VC = 50VDC 700H < fO = 100kHz
Two-Decade High-Frequency VCO
+ V (12V
DC)
+V
2RS
REF HI
RS
10K + - LAMP
+V + 5V
IN
+
DC 360
2RS +VREF LOW
2N2222 -
Limit Comparator
+
+V
REF 4 100
-
100k + 5V 360 DC
5VDC
+ + - +VREF 1.4VDC
VO 10K
o -12V
+V
VO
REF 3 - 100 100k + 5V 360 DC
-12VDC
TTL-to-MOS Logic Converter
V+ 200k 2.0k V+ 0.1F + - VO 0
+V
+
REF 2 - 100k + 5V 360 DC
100k
100
+V
+
REF 1 - 100 100k
200k
CRYSTAL 1 - 100kHz
Visible Voltage Indicator
Crystal-Controlled Oscillator
NOTE: Input of unused comparators should be grounded.
August 31, 1994
303
Philips Semiconductors Linear Products
Product specification
Low power dual voltage comparator
AU2903
TYPICAL PERFORMANCE CHARACTERISTICS
Input Current
V O-- SATURATION VOLTAGE (V DC)
Output Saturation Voltage
10 OUT OF SATURATION 1.0
80
I N -- INPUT CURRENT -- nADC VIN (CM) = 0 VDC RIN (CM) = 10k
60
TA = -55oC TA = 0oC
40
0.1
TA = +125oC TA = -55oC
20
TA = +125oC
TA = +25oC TA = +70oC
0.01 TA = +25o 0.1 1.0 10 100
0
10
20
30
40
0.001 0.01
v + -- SUPPLY VOLTAGE -- VDC
IO -- OUTPUT SINK CURRENT (mA)
Response Time for Various Input Overdrives -- Negative Transition
OUTPUT VOLTAGE VO -- mV OUTPUT VOLTAGE VO -- mV 6 5 4 3 2 1 INPUT VOLTAGE VIN -- mV 0 0 -50 VIN - + 5mV = INPUT OVERDRIVE + 5V 6 5 4 3 2 1 INPUT VOLTAGE VIN -- mV 0 0 -50
Response Time for Various Input Overdrives -- Positive Transition
INPUT OVERDRIVE = 100mV
20mV
5.1K VOUT
5mV 20mV
100mV
+ 5V
OVERDRIVE
TA = 25oC 0 0.5 1.0 1.5 2.0 TIME -- sec
TA = 25oC
VIN
- +
5.1K VOUT
-100
-100 0 0.5
OVERDRIVE
1.0 1.5 2.0 TIME -- sec
August 31, 1994
304

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