Precision Low Power
Single-Supply JFET Amplifier

AD8627/AD8626/AD8625


Rev. B
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FEATURES
SC70 package
Very low IB: 1 pA max
Single-supply operation: 5 V to 26 V
Dual-supply operation: ±2.5 V to ±13 V
Rail-to-rail output
Low supply current: 630 µA/amp typ
Low offset voltage: 500 µV max
Unity gain stable
No phase reversal

APPLICATIONS
Photodiode amplifiers
ATE
Line-powered/battery-powered instrumentation
Industrial controls
Automotive sensors
Precision filters
Audio

GENERAL DESCRIPTION
The AD862x is a precision JFET input amplifier. It features
true single-supply operation, low power consumption, and
rail-to-rail output. The outputs remain stable with capacitive
loads of over 500 pF; the supply current is less than 630 µA/amp.
Applications for the AD862x include photodiode transimpedance
amplification, ATE reference level drivers, battery management,
both line powered and portable instrumentation, and remote
sensor signal conditioning including automotive sensors.
The AD862x’s ability to swing nearly rail-to-rail at the input
and rail-to-rail at the output enables it to be used to buffer
CMOS DACs, ASICs, and other wide output swing devices in
single-supply systems.
The 5 MHz bandwidth and low offset are ideal for precision
filters.
The AD862x is fully specified over the industrial temperature
range. (–40° to +85°) The AD8627 is available in both 5-lead
SC70 and 8-lead SOIC surface-mount packages. The SC70
packaged parts are available in tape and reel only. The AD8626
is available in an MSOP package.
PIN CONFIGURATIONS
03023-B
-
001
2
3
1
4
5OUT A
V–
+IN
V+
–IN
AD8627
5-Lead SC70
(KS Suffix)
NC
–IN V+2
+IN OUT3
V– NC4
NC1
7
6
5
8
AD8627
NC = NO CONNECT
8-Lead SOIC
(R-8 Suffix)
OUT A
–IN A OUT B2
+IN A –IN B3
V– +IN B4
V+1
7
6
5
8
AD8626
8-Lead SOIC
(R-8 Suffix)
V+OUT A
OUT B–IN A
–IN B+IN A
+IN BV–
AD8626
8-Lead MSOP
(RM-Suffix)
5
8
4
1
OUT A OUT D114
–IN A –IN D213
+IN A +IN D312
V+ V–411
+IN B +IN C510
–IN B –IN C69
OUT B OUT C78
AD8625
14-Lead SOIC
(R-Suffix)
OUT DOUT A
–IN D–IN A
+IN D+IN A
V–V+
+IN C+IN B
–IN C–IN B
OUT COUT B
AD8625
14-Lead TSSOP
(RU-Suffix)
8
14
7
1

Figure 1.