HM8521, HM8522, HM8524
3.4μA, 90kHz, RRIO CMOS Operational Amplifiers
General Description
The HM8521 (single), HM8522 (dual) and HM8524 (quad) are ultra-low power
operational amplifiers that provide 90kHz bandwidth with only 3.4μA quiescent current.
These rail-to-rail input and output amplifiers are specifically designed for battery-powered
applications. The input common-mode voltage range extends 300mV beyond the power-
supply rails and the output swings to only 6mV of the rails, maintaining wide dynamic
range. Unlike some micro-power op-amps, these parts are unity-gain stable. The
HM852x family features a low input bias current that allows the use of large source and
feedback resistors.
The HM852x op-amps are specified for single or dual power supplies of +2.3V to +5.5V.
All models are specified over the extended industrial temperature range of −40℃ to
+125℃. The HM8521 is available in 5-lead SC70 and SOT-23 packages. The HM8522
is available in 8-lead MSOP and SOIC packages. The HM8524 is available in 14-lead
TSSOP and SOIC packages.
Features and Benefits
Low Supply Current: 4.2 μA Maximum per Amplifier
Gain-Bandwidth: 90 kHz
Unity Gain Stable
Low Offset Voltage: 3.0 mV Maximum
Rail-to-Rail Input and Output
–
Input Range: 300 mV Beyond Rails
DC Precision
–
–
–
CMRR: 102 dB
PSRR: 102dB
VOL: 110dB
A
Output Swings to 6 mV of Rails
Operating Power Supply: +2.3 to +5.5 V
Operating Temperature Range: −40℃ to +125℃
Applications
Battery-Powered Systems
Sensor Interfaces, Remote Sensing
Supply Current Sensing
Safety Monitoring
Portable Medical Instruments
Analog Active Filters
ASIC Input or Output Amplifier
Pin Configurations (Top View)
HM8524
TSSOP-14/SO-14
HM8522
HM8521
MSOP-8/SO-8
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT A
OUT D
﹣IN D
﹢IN D
﹣VS
SC70-5/SOT23-5
﹣IN A
﹢IN A
﹢VS
A
D
1
2
3
4
8
7
6
5
OUT A
﹣IN A
﹢IN A
﹣VS
﹢VS
1
2
3
5
4
OUT
﹣VS
﹢IN
﹢VS
﹣IN
OUT B
﹣IN B
﹢IN B
A
B
﹢IN B
﹣IN B
OUT B
﹢IN C
﹣IN C
OUT C
B
C
8
1