Holtek Semiconductor Inc HT9274 Datasheet
Quad Micropower Op Amp
Features
Quad micro power op amp
·
Wide range of supply voltage: 1.6V~5.5V
·
High input impedance
·
Single supply operation
·
Low current consumption: < 5mA per amp
·
Rail to rail output
·
Provides both sink and source output drive
·
capability
Applications
Battery powered system
·
Sensor amplifier
·
Low power gain blocks
·
Low power comparators
·
General Description
The HT9274 is a CMOS quad micro-power op
erational amplifier featuring high input imped
ance, extremely low power, high gain and high
stability.
It allows common mode input voltage range
which extends below the negative rail, output
swings to both rails with a reasonable sink and
souce capability of the output drive current.
This cost-effective device is suitable for high
HT9274
Common mode input extends below nega
·
tive rail
Pin compatible with LM324/WT274 (14-pin
·
DIP)
14-pin DIP/SOP package
·
Signal detectors
·
Active filters
·
Caller ID systems
·
Communication systems
·
gain, low frequency, low power applications, es
pecially ideal for battery powered systems
where mA range of standby current is essential
for long battery life span. For example, in
multi-standard Caller ID systems, HT9274 is
ideal as a low power line signal monitor/detector, and in car alarm systems, the HT9274 is excellent for piezo vibratile detector signal
amplifier application.
-
-
Comparison Table
ITEM
HT9274 1.6~5.5V
WT274 1.35~10V
LM324 3~32V
Operating
Voltage
Operating
Current
5mA 500mA 500mA
9mA16mA
400mA
Output
Source
Current
20mA 8mA 45nA 1MHz
Output
Sink
Current
2mA 1pA 0.1MHz
1 November 23, 1999
Input Bias
Current
1pA 0.1MHz
GBW
Max. load
(To VDD
or VSS)
>10kW
>500kW
>2kW
Block Diagram
HT9274
Pin Assignment
1O U T
1IN
1IN +
VDD
2IN +
2IN
2O U T
4O U T
-
-
1O U T
1IN
1IN +
VDD
2IN +
2IN
2O U T
1
-
2
3
4
5
-
6
7
14
4O U T
13
4IN
-
12
4IN +
11
VSS
10
3IN +
9
3IN
-
8
3O U T
4IN
4IN +
VSS
3IN +
3IN
3O U T
-
-
H T9274
1 4 D IP /S O P
2 November 23, 1999
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