AD8641 Datasheet, PDF (1/12 Pages) Analog Devices – Low Power, Rail-to-Rail Output Precision JFET Amplifier

FEATURES
Low supply current: 250 µA max
Very low input bias current: 1 pA max
Low offset voltage: 750 µV max
Single-supply operation: 5 V to 26 V
Dual-supply operation: ±2.5 V to ±13 V
Rail-to-rail output
Unity gain stable
No phase reversal
SC70 package
APPLICATIONS
Line-/battery-powered instruments
Photodiode amplifiers
Precision current sensing
Medical instrumentation
Industrial controls
Precision filters
Portable audio
ATE
GENERAL DESCRIPTION
The AD8641 is a low power, precision JFET input amplifier
featuring extremely low input bias current and rail-to-rail
output. The ability to swing nearly rail-to-rail at the input and
rail-to-rail at the output enables designers to buffer CMOS
DACs, ASICs, and other wide output swing devices in single-
supply systems. The outputs remain stable with capacitive loads
of more than 500 pF.
Low Power, Rail-to-Rail Output
Precision JFET Amplifier
AD8641
OUT 1
5 VCC
AD8641
VEE 2 TOP VIEW
(Not to Scale)
+IN 3
4 –IN
Figure 1. 5-Lead SC70 (KS-5)
NC 1
–IN 2
+IN 3
VEE 4
AD8641
TOP VIEW
(Not to Scale)
8 NC
7 VCC
6 OUT
5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R-8)
The AD8641 is suitable for applications utilizing multichannel
boards that require low power to manage heat. Other applica-
tions include photodiodes, ATE reference level drivers, battery
management, and industrial controls.
The AD8641 is fully specified over the extended industrial
temperature range of –40° to +125°C. The AD8641 is available
in 5-lead SC70 and 8-lead SOIC lead-free packages.
Rev. 0
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