HT9274
Quad Micropower Op Amp
Features
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Quad micro power op amp
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Common mode input extends below nega-
tive rail
Wide range of supply voltage: 1.6V~5.5V
High input impedance
Single supply operation
Pin compatible with LM324/WT274 (14-pin
DIP)
14-pin DIP/SOP package
Low current consumption: < 5mA per amp
Rail to rail output
Provides both sink and source output drive
capability
Applications
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Battery powered system
Sensor amplifier
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Signal detectors
Active filters
Low power gain blocks
Low power comparators
Caller ID systems
Communication systems
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.
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/detec-
tor, and in car alarm systems, the HT9274 is ex-
cellent for piezo vibratile detector signal
amplifier application.
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
Comparison Table
Output
Source
Current
Output
Sink
Current
Max. load
(To VDD
or VSS)
Operating Operating
Current
Input Bias
Current
ITEM
GBW
Voltage
HT9274 1.6~5.5V
WT274 1.35~10V
1pA
1pA
0.1MHz
0.1MHz
1MHz
5mA
9mA
500mA
16mA
500mA
2mA
>10kW
>500kW
>2kW
LM324
3~32V
20mA
8mA
45nA
400mA
1
November 23, 1999