Precision Low Power
Single-Supply JFET Amplifiers
AD8625/AD8626/AD8627
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
PIN CONFIGURATIONS
8-Lead SOIC
(R-8 Suffix)
NC 1
–IN
8 NC
7 V+
2
+IN 3
5-Lead SC70
(KS Suffix)
AD8627
V– 4
6 OUT
5
OUT A
1
V–
2
+IN
3
5 V+
AD8627
4 –IN
NC
NC = NO CONNECT
8-Lead SOIC
(R-8 Suffix)
8-Lead MSOP
(RM-Suffix)
APPLICATIONS
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.
OUT A 1
–IN A
8 V+
7 OUT B
2
+IN A 3
AD8626
V– 4
6 –IN B
5
OUT A
–IN A
+IN A
V–
14 OUT D
–IN A 2
13 –IN D
AD8625
4
5
V+
OUT B
–IN B
+IN B
14-Lead TSSOP
(RU-Suffix)
OUT A 1
V+ 4
8
AD8626
+IN B
14-Lead SOIC
(R-Suffix)
+IN A 3
1
12 +IN D
11 V–
+IN B 5
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
OUT A
–IN A
+IN A
V+
+IN B
–IN B
OUT B
1
14
AD8625
7
8
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
03023-001
Photodiode amplifiers
ATEs
Line-powered/battery-powered instrumentation
Industrial controls
Automotive sensors
Precision filters
Audio
Figure 1.
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.
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
© 2004 Analog Devices, Inc. All rights reserved.
AD8625/AD8626/AD8627
AD8625/AD8626/AD8627 SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
@VS = 5 V, VCM = 1.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
0.05
0.5
1.2
1
60
0.5
25
3
87
230
2.5
mV
mV
pA
pA
pA
pA
V
dB
V/mV
µV/°C
±10
V
V
V
V
mA
−40°C < TA < +85°C
Input Bias Current
IB
0.25
–40°C < TA < +85°C
Input Offset Current
IOS
–40°C < TA < +85°C
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
CMRR
AVO
∆VOS/∆T
VCM = 0 V to 2.5 V
RL = 10 kΩ, VO = 0.5 V to 4.5 V
–40°C < TA < +85°C
VOH
IL = 2 mA, –40°C < TA < +85°C
Output Voltage Low
0
66
100
4.92
4.90
VOL
0.075
0.08
IL = 2 mA, –40°C < TA < +85°C
Output Current
POWER SUPPLY
Power-Supply Rejection Ratio
Supply Current/Amplifier
IOUT
PSRR
ISY
VS = 5 V to 26 V
80
104
630
–40°C < TA < +85°C
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Channel Separation
SR
GBP
ØM
en p-p
en
in
Cs
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
Rev. C | Page 3 of 20
785
800
dB
µA
µA
5
5
60
V/µs
MHz
Degrees
1.9
17.5
0.4
104
µV p-p
nV/√Hz
fA/√Hz
dB
AD8625/AD8626/AD8627
ELECTRICAL CHARACTERISTICS
@VS = ±13 V; VCM = 0 V; TA = 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
0.35
0.75
1.35
1
60
0.5
25
+11
105
310
2.5
mV
mV
pA
pA
pA
pA
V
dB
V/mV
µV/°C
±15
V
V
V
V
mA
–40°C < TA < +85°C
Input Bias Current
IB
0.25
–40°C < TA < +85°C
Input Offset Current
IOS
–40°C < TA < +85°C
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
CMRR
AVO
∆VOS/∆T
VOH
VOH
VOL
VOL
IOUT
PSRR
ISY
VCM = –13 V to +10 V
RL = 10 kΩ, VO = –11 V to +11 V
–40°C < TA < +85°C
IL = 2 mA, –40°C < TA < +85°C
–13
76
150
+12.92
+12.91
–12.92
–12.91
IL = 2 mA, –40°C < TA < +85°C
VS = ±2.5 V to ±13 V
80
104
710
–40°C < TA < +85°C
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
Phase Margin
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
Channel Separation
SR
GBP
ØM
en p-p
en
in
Cs
0.1 Hz to 10 Hz
f = 1 kHz
f = 1 kHz
f = 1 kHz
Rev. C | Page 4 of 20
850
900
dB
µA
µA
5
5
60
V/µs
MHz
Degrees
2.5
16
0.5
105
µV p-p
nV/√Hz
fA/√Hz
dB
AD8625/AD8626/AD8627
ABSOLUTE MAXIMUM RATINGS
Absolute maximum ratings apply at 25°C, unless otherwise
noted.
Table 3. Stress Ratings
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
VS– to VS+
± Supply Voltage
Indefinite
−65°C to +125°C
−40°C to +85°C
−65°C to +150°C
300°C
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
sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods may
affect device reliability.
Table 4.
Package Type
5-Lead SC70 (KS)
8-Lead MSOP (RM)
8-Lead SOIC (R)
14-Lead SOIC (R)
14-Lead TSSOP (RU)
1
θJA 1
376
210
158
120
180
θJC
126
45
43
36
35
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
θJA is specified for worst-case conditions when devices are soldered in circuit
boards for surface-mount packages.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. C | Page 5 of 20
AD8625/AD8626/AD8627
OUTLINE DIMENSIONS
8.75 (0.3445)
8.55 (0.3366)
2.00 BSC
5
4
1.25 BSC
4.00 (0.1575)
3.80 (0.1496)
2.10 BSC
1
2
8
1
7
6.20 (0.2441)
5.80 (0.2283)
3
PIN 1
1.27 (0.0500)
BSC
0.65 BSC
1.00
0.90
0.70
0.25 (0.0098)
0.10 (0.0039)
1.10 MAX
0.22
0.08
0.30
0.15
0.10 MAX
14
0.46
0.36
0.26
8°
4°
0°
SEATING
PLANE
0.51 (0.0201)
0.31 (0.0122)
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-203AA
Figure 50. 5-Lead Plastic Surface-Mount Package [SC70]
(KS-5)
Dimensions shown in millimeters
5
4
8°
0.25 (0.0098) 0° 1.27 (0.0500)
0.40 (0.0157)
0.17 (0.0067)
Figure 53. 14-Lead Standard Small Outline Package [SOIC]
(R-14)
Dimensions shown in millimeters and (inches)
5.00 (0.1968)
4.80 (0.1890)
8
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MS-012AB
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.10 COPLANARITY
4.00 (0.1574)
3.80 (0.1497) 1
0.50 (0.0197)
× 45°
0.25 (0.0098)
1.75 (0.0689)
1.35 (0.0531)
5.10
5.00
4.90
6.20 (0.2440)
5.80 (0.2284)
1.27 (0.0500)
BSC
14
0.50 (0.0196)
× 45°
0.25 (0.0099)
1.75 (0.0688)
1.35 (0.0532)
0.25 (0.0098)
0.10 (0.0040)
0.51 (0.0201)
COPLANARITY
SEATING 0.31 (0.0122)
0.10
PLANE
8
4.50
4.40
4.30
6.40
BSC
1
7
PIN 1
8°
0.25 (0.0098) 0° 1.27 (0.0500)
0.40 (0.0157)
0.17 (0.0067)
1.05
1.00
0.80
COMPLIANT TO JEDEC STANDARDS MS-012AA
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN
0.65
BSC
1.20
MAX
0.15
0.05
0.30
0.19
0.20
0.09
SEATING
COPLANARITY
PLANE
0.10
8°
0°
COMPLIANT TO JEDEC STANDARDS MO-153AB-1
Figure 54. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
Figure 51. 8-Lead Standard Small Outline Package [SOIC]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
3.00
BSC
8
5
4.90
BSC
3.00
BSC
4
PIN 1
0.65 BSC
1.10 MAX
0.15
0.00
0.38
0.22
COPLANARITY
0.10
0.23
0.08
8°
0°
0.80
0.60
0.40
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-187AA
Figure 52. 8-Lead Mini Small Outline Package [MSOP]
(RM-8)
Dimensions shown in millimeters
Rev. C | Page 18 of 20
0.75
0.60
0.45
AD8625/AD8626/AD8627
ORDERING GUIDE
Model
AD8627AKS-REEL
AD8627AKS-REEL7
AD8627AKS-R2
AD8627AKSZ-REEL1
AD8627AKSZ-REEL71
AD8627AKSZ-R21
AD8627AR
AD8627AR-REEL
AD8627AR-REEL7
AD8627ARZ1
AD8627ARZ-REEL1
AD8627ARZ-REEL71
AD8626ARM-REEL
AD8626ARM-R2
AD8626ARMZ-REEL1
AD8626ARMZ-R21
AD8626AR
AD8626AR-REEL
AD8626AR-REEL7
AD8626ARZ1
AD8626ARZ-REEL1
AD8626ARZ-REEL71
AD8625ARU
AD8625ARU-REEL
AD8625ARUZ1
AD8625ARUZ-REEL1
AD8625AR
AD8625AR-REEL
AD8625AR-REEL7
AD8625ARZ1
AD8625ARZ-REEL1
AD8625ARZ-REEL71
1
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package Description
5-Lead SC70
5-Lead SC70
5-Lead SC70
5-Lead SC70
5-Lead SC70
5-Lead SC70
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
8-Lead MSOP
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
8-Lead SOIC
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
14-Lead TSSOP
14-Lead SOIC
14-Lead SOIC
14-Lead SOIC
14-Lead SOIC
14-Lead SOIC
14-Lead SOIC
Z = Pb-free part.
Rev. C | Page 19 of 20
Package Option
KS-5
KS-5
KS-5
KS-5
KS-5
KS-5
R-8
R-8
R-8
R-8
R-8
R-8
RM-8
RM-8
RM-8
RM-8
R-8
R-8
R-8
R-8
R-8
R-8
RU-14
RU-14
RU-14
RU-14
R-14
R-14
R-14
R-14
R-14
R-14
Branding
B9A
B9A
B9A
B9A
B9A
B9A
BJA
BJA
BJA
BJA