Data Sheet
FEATURES
SC70 package
Very low I
B
: 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
Precision Low Power
Single-Supply JFET Amplifiers
AD8625/AD8626/AD8627
PIN CONFIGURATIONS
8-Lead SOIC
(R-8 Suffix)
NC 1
–IN
2
8 NC
7 V+
OUT A
V–
+IN
1
2
3
5-Lead SC70
(KS Suffix)
5 V+
AD8627
4 –IN
+IN 3
V– 4
AD8627
6 OUT
5
NC
NC = NO CONNECT
8-Lead SOIC
(R-8 Suffix)
8-Lead MSOP
(RM-Suffix)
8 V+
7 OUT B
OUT A
–IN A
+IN A
V–
1
8
V+
OUT B
–IN B
+IN B
APPLICATIONS
Photodiode amplifiers
ATEs
Line-powered/battery-powered instrumentation
Industrial controls
Automotive sensors
Precision filters
Audio
OUT A 1
–IN A
2
AD8626
4
5
+IN A 3
V– 4
AD8626
6 –IN B
5
+IN B
14-Lead SOIC
(R-Suffix)
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
14 OUT D
13 –IN D
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
14-Lead TSSOP
(RU-Suffix)
1
14
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
03023-001
AD8625
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
AD8625
7
8
Figure 1.
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, which includes 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°C to +85°C). The AD8627 is available in both
5-lead SC70 and 8-lead SOIC surface-mount packages (SC70
packaged parts are available in tape and reel only). The AD8626
is available in MSOP and SOIC packages, while the AD8625 is
available in TSSOP and SOIC packages.
Rev. F
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AD8625/AD8626/AD8627
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Pin Configurations ........................................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Electrical Characteristics ............................................................. 3
Absolute Maximum Ratings ............................................................ 5
ESD Caution .................................................................................. 5
Data Sheet
Typical Performance Characteristics ..............................................6
Applications Information .............................................................. 13
Minimizing Input Current ........................................................ 15
Photodiode Preamplifier Application...................................... 15
Output Amplifier for DACs ...................................................... 16
Eight-Pole Sallen Key Low-Pass Filter ..................................... 17
Outline Dimensions ....................................................................... 18
Ordering Guide .......................................................................... 20
REVISION HISTORY
5/13—Rev. E to Rev. F
Changes to Applications Information Section............................ 13
Changes to Ordering Guide .......................................................... 20
12/10—Rev. D to Rev. E
Removed Table Summary Conditions Above Table 3 ................. 5
Updated Outline Dimensions ....................................................... 18
3/09—Rev. C to Rev. D
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide .......................................................... 19
11/04—Rev. B to Rev. C
Updated Figure Codes ....................................................... Universal
Changes to Figure 17 and 18 ........................................................... 8
Changes to Figure 33 and Figure 37............................................. 11
Changes to Figure 38 ...................................................................... 12
Changes to Figure 39 and Figure 40............................................. 13
Changes to Figure 41 to Figure 44 ................................................ 14
1/04—Rev. A to Rev. B
Change to General Description .......................................................1
Change to Figure 10 ..........................................................................7
Change to Figure13 ...........................................................................7
Change to Figure 37 ....................................................................... 11
Changes to Figure 38...................................................................... 12
Change to Output Amplifier for DACs Section ......................... 15
Updated Outline Dimensions ....................................................... 19
10/03—Rev. 0 to Rev. A
Addition of Two New Parts ............................................... Universal
Change to General Description .......................................................1
Changes to Pin Configurations .......................................................1
Change to Specifications Table ........................................................3
Changes to Figure 31...................................................................... 10
Changes to Figure 32...................................................................... 11
Changes to Figure 38...................................................................... 12
Changes to Figure 46...................................................................... 16
Changes to Figure 47...................................................................... 16
Changes to Figure 49...................................................................... 17
Updated Outline Dimensions ....................................................... 18
Changes to Ordering Guide .......................................................... 19
Rev. F | Page 2 of 20
Data Sheet
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@V
S
= 5 V, V
CM
= 1.5 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
POWER SUPPLY
Power-Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Channel Separation
Symbol
V
OS
−40°C < T
A
< +85°C
I
B
–40°C < T
A
< +85°C
I
OS
–40°C < T
A
< +85°C
CMRR
A
VO
∆V
OS
/∆T
V
OH
I
L
= 2 mA, –40°C < T
A
< +85°C
V
OL
I
L
= 2 mA, –40°C < T
A
< +85°C
I
OUT
PSRR
I
SY
V
S
= 5 V to 26 V
–40°C < T
A
< +85°C
SR
GBP
Ø
M
e
n
p-p
e
n
i
n
C
s
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
V
CM
= 0 V to 2.5 V
R
L
= 10 kΩ, V
O
= 0.5 V to 4.5 V
–40°C < T
A
< +85°C
Conditions
AD8625/AD8626/AD8627
Min
Typ
0.05
0.25
Max
0.5
1.2
1
60
0.5
25
3
Unit
mV
mV
pA
pA
pA
pA
V
dB
V/mV
µV/°C
V
V
V
V
mA
dB
µA
µA
V/µs
MHz
Degrees
µV p-p
nV/√Hz
fA/√Hz
dB
0
66
100
87
230
2.5
4.92
4.90
0.075
0.08
±10
80
104
630
785
800
5
5
60
1.9
17.5
0.4
104
Rev. F | Page 3 of 20
AD8625/AD8626/AD8627
@V
S
= ±13 V; V
CM
= 0 V; T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
Output Current
POWER SUPPLY
Power-Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Channel Separation
Symbol
V
OS
–40°C < T
A
< +85°C
I
B
–40°C < T
A
< +85°C
I
OS
–40°C < T
A
< +85°C
CMRR
A
VO
∆V
OS
/∆T
V
OH
V
OH
V
OL
V
OL
I
OUT
PSRR
I
SY
V
CM
= –13 V to +10 V
R
L
= 10 kΩ, V
O
= –11 V to +11 V
–40°C < T
A
< +85°C
–13
76
150
105
310
2.5
0.25
Conditions
Min
Typ
0.35
Data Sheet
Max
0.75
1.35
1
60
0.5
25
+11
Unit
mV
mV
pA
pA
pA
pA
V
dB
V/mV
µV/°C
V
V
V
V
mA
dB
µA
µA
V/µs
MHz
Degrees
µV p-p
nV/√Hz
fA/√Hz
dB
I
L
= 2 mA, –40°C < T
A
< +85°C
I
L
= 2 mA, –40°C < T
A
< +85°C
+12.92
+12.91
–12.92
–12.91
±15
V
S
= ±2.5 V to ±13 V
–40°C < T
A
< +85°C
80
104
710
850
900
SR
GBP
Ø
M
e
n
p-p
e
n
i
n
C
s
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
5
5
60
2.5
16
0.5
105
Rev. F | Page 4 of 20
Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration
Storage Temperature Range, R Package
Operating Temperature Range
Junction Temperature Range, R Package
Lead Temperature Range (Soldering, 60 sec)
Ratings
27 V
V
S–
to V
S+
± Supply Voltage
Indefinite
−65°C
to +125°C
−40°C
to +85°C
−65°C
to +150°C
300°C
AD8625/AD8626/AD8627
θ
JA
is specified for worst-case conditions when devices are
soldered in circuit boards for surface-mount packages.
Table 4.
Package Type
5-Lead SC70 (KS)
8-Lead MSOP (RM)
8-Lead SOIC (R)
14-Lead SOIC (R)
14-Lead TSSOP (RU)
θ
JA
376
210
158
120
180
θ
JC
126
45
43
36
35
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. F | Page 5 of 20
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