Diodes AS331 User Manual
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331
General Description
The AS331 consists of a single precision voltage comparator with a typical input offset voltage of 1.0mV
and high voltage gain. It is specifically designed to
operate from a single power supply over wide range of
voltages. Operation from split power supply is also
possible and the low power supply current drain is
independent of the magnitude of the power supply
voltage.
The AS331 is available in standard SOT-23-5 package.
Features
· Wide Supply Voltage Range
- Single Supply: 2V to 36V
- Dual Supplies: ±1V to ±18V
· Low Supply Current at V
· Low Input Bias Current: 25nA (Typical)
· Low Input Offset Current:5nA (Typical)
· Low Input Offset Voltage: 1mV (Typical)
· Input Common Mode Voltage Range Includes
Ground
· Differential Input Voltage Range Equals to the
Power Supply Voltage
· Low Output Saturation Voltage at 4mA: 200mV
(Typical)
· Open Collector Output
=5V: 0.4mA
CC
Applications
· Battery Charger
· Cordless Telephone
· Switching Power Supply
· DC-DC Module
· PC Motherboard
· Communication Equipment
SOT-23-5
Figure 1. Package Type of AS331
May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
1
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331
Pin Configuration
K Package
(SOT-23-5)
INPUT-
INPUT+
Figure 2. Pin Configuration of AS331 (Top View)
Functional Block Diagram
GND
1
5
VCC
2
34
VCC
5
OUTPUT
INPUT+
INPUT-
GND
3
Q1
1
2
Q2 Q3
Q5
Q6
Q4
Q7
Q8
4
OUTPUT
Figure 3. Functional Block Diagram of AS331
May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
2
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331
Ordering Information
AS331 -
E1: Lead Free
Circuit Type
G1: Green
Package
TR: Tape and Reel
K: SOT-23-5
Package
SOT-23-5
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green package.
Temperature
Range
-40 to 85
o
C
Lead Free Green Lead Free Green
AS331KTR-E1 AS331KTR-G1 EEA GEA Tape & Reel
Part Number Marking ID
Packing
Typ e
Absolute Maximum Ratings (Note 1)
Parameter Symbol Value Unit
Supply Voltage
Differential Input Voltage
Input Voltage
Input Current (V
Output Short-circuit Current to Ground Continuous
<-0.3V) (Note 2) I
IN
V
CC
V
ID
V
IN
IN
40 V
40 V
-0.3 to 40 V
50 mA
Power Dissipation (T
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10sec)
=25oC)
A
T
T
LEAD
P
T
STG
D
J
620 mW
150
-65 to 150
260
o
C
o
C
o
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability.
Note 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 -0.3V (at
o
25
C).
May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
3
Data Sheet
LOW POWER LOW OFFSET VOLTAGE SINGLE COMPARATOR AS331
Recommended Operating Conditions
Parameter Symbol Min Max Unit
Supply Voltage
Operating Ambient Temperature Range
V
CC
T
A
236V
-40 85
o
C
Electrical Characteristics
VCC=5V, GND=0V, TA=25oC, unless otherwise specified. Bold typeface applies over TA=-40 to 85oC (Note 3)
Parameter Symbol Conditions Min Typ Max Unit
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Common Mode
Voltage Range (Note 4)
Supply Current
Voltage Gain
Large Signal Response
Time
Response Time
Output Sink Current
Output Leakage Current
Saturation Voltage
V
OS
I
B
I
IO
I
CC
G
V
I
SINKVIN
I
LEAK
V
SAT
V
=1.4V, VCC=5 to 30V
OUT
IIN+ or IIN- with output in linear range,
=0V
V
CM
IIN+-IIN-, VCM=0V
V
=30V
CC
=5V 0.4 1.0
V
CC
RL=∞
=30V 0.5 1.7
V
CC
VCC=15V, RL≥15kΩ, V
V
=TTL Logic Swing, RL=5.1kΩ
IN
=5.1kΩ
R
L
-=1V, VIN+=0V, V
VIN-=0V, VIN+=1V, V
V
-=0V, VIN+=1V, V
IN
VIN-=1V, VIN+=0V, I
OUT
OUT
OUT
OUT
SINK
=1 to 11V
=1.5V
=5V
=30V
≤4mA
0
50 200 V/mV
2 0 0 n s
6.0 16 mA
15
7.0
mV
25 250
400
550
200
VCC-1.5
2.0
mA
3.0
1.3 µs
0.1 nA
1 µA
200 400
500
mV
nA
nA
V
Note 3: These specifications are limited to -40oC≤T
o
≤85
C. Limits over temperature are guaranteed by design, but
A
not tested in production.
Note 4: The input common mode voltage of either input signal voltage should not be allowed to go negatively by
more than 0.3V (at 25
o
C). The upper end of the common mode voltage range is V
CC
both inputs can go to +36V without damages, independent of the magnitude of the V
-1.5V (at 25
.
CC
o
C), but either or
May. 2010 Rev. 1. 4 BCD Semiconductor Manufacturing Limited
4
Loading...