ANALOG DEVICES AD 8629 ARZ Datasheet

Zero-Drift, Single-Supply, Rail-to-Rail

Input/Output Operational Amplifier

AD8628/AD8629/AD8630

OUT

1

V–

2

+IN

3

V+

5

–IN

4

AD8628

TOP VIEW

(Not to Scale)

02735-001

NC

1

–IN

2

+IN

3

V–

4

NC

8

V+

7

OUT

6

NC

5

NC = NO CONNECT

AD8628

TOP

VIEW

(Not to S cal e)

02735-002

OUT A

1

–IN A

2

+IN A

3

V–

4

V+

8

OUT B

7

–IN B

6

+IN B

5

AD8629

TOP VIEW

(Not to Scale)

02735-063

1

–IN

A

2

+IN A

3

V+

4

OUT D

14

–IN D

13

+IN D

12

V–

11

+IN B

5

+IN C

10

–IN B

6

–IN C

9

OUT B

OUT A

7

OUT C

8

AD8630

TOP VIEW

(Not to S cal e)

02735-066

Data Sheet

FEATURES

Lowest auto-zero amplifier noise
Low offset voltage: 1 µV
Input offset drift: 0.002 µV/°C
Rail-to-rail input and output swing
5 V single-supply operation
High gain, CMRR, and PSRR: 130 dB
Very low input bias current: 100 pA maximum
Low supply current: 1.0 mA
Overload recovery time: 50 µs
No external components required
Qualified for automotive applications

APPLICATIONS

Automotive sensors
Pressure and position sensors
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
Precision current sensing
Photodiode amplifiers

GENERAL DESCRIPTION

This amplifier has ultralow offset, drift, and bias current.
The AD8628/AD8629/AD8630 are wide bandwidth auto-zero
amplifiers featuring rail-to-rail input and output swing and low
noise. Operation is fully specified from 2.7 V to 5 V single supply
(±1.35 V to ±2.5 V dual supply).

The AD8628/AD8629/AD8630 provide benefits previously
found only in expensive auto-zeroing or chopper-stabilized
amplifiers. Using Analog Devices, Inc., topology, these zero­drift amplifiers combine low cost with high accuracy and low
noise. No external capacitor is required. In addition, the AD8628/

AD8629/AD8630 greatly reduce the digital switching noise

found in most chopper-stabilized amplifiers.
With an offset voltage of only 1 µV, drift of less than 0.005 μV/°C,

and noise of only 0.5 µV p-p (0 Hz to 10 Hz), the AD8628/

AD8629/AD8630 are suited for applications where error

sources cannot be tolerated. Position and pressure sensors,
medical equipment, and strain gage amplifiers benefit greatly
from nearly zero drift over their operating temperature range.
Many systems can take advantage of the rail-to-rail input and
output swings provided by the AD8628/AD8629/AD8630 to
reduce input biasing complexity and maximize SNR.

PIN CONFIGURATIONS

Figure 1. 5-Lead TSOT (UJ-5) and 5-Lead SOT-23 (RJ-5)

Figure 2. 8-Lead SOIC_N (R-8)

Figure 3. 8-Lead SOIC_N (R-8) and 8-Lead MSOP (RM-8)

Figure 4. 14-Lead SOIC_N (R-14) and 14-Lead TSSOP (RU-14)

The AD8628/AD8629/AD8630 are specified for the extended
industrial temperature range (−40°C to +125°C). The AD8628
is available in tiny 5-lead TSOT, 5-lead SOT-23, and 8-lead
narrow SOIC plastic packages. The AD8629 is available in the
standard 8-lead narrow SOIC and MSOP plastic packages. The

AD8630 quad amplifier is available in 14-lead narrow SOIC and

14-lead TSSOP plastic packages. See the Ordering Guide for
automotive grades.

Document Feedback

Rev. K

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rights of third parties that may result from its use. Specifications subject to change without notice. No
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AD8628/AD8629/AD8630 Data Sheet

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Pin Configurations ........................................................................... 1

Revision History ............................................................................... 3

Specifications ..................................................................................... 4

Electrical Characteristics—VS = 5.0 V ....................................... 4

Electrical Characteristics—VS = 2.7 V ....................................... 5

Absolute Maximum Ratings ............................................................ 6

Thermal Characteristics .............................................................. 6

ESD Caution .................................................................................. 6

Typical Performance Characteristics ............................................. 7

Functional Description .................................................................. 15

1/f Noise ....................................................................................... 15

Peak-to-Peak Noise .................................................................... 16

Noise Behavior with First-Order, Low-Pass Filter ................. 16

Total Integrated Input-Referred Noise for First-Order Filter16

Input Overvoltage Protection ................................................... 17

Output Phase Reversal ............................................................... 17

Overload Recovery Time .......................................................... 17

Infrared Sensors .......................................................................... 18

Precision Current Shunt Sensor ............................................... 19

Output Amplifier for High Precision DACs ........................... 19

Outline Dimensions ....................................................................... 20

Ordering Guide .......................................................................... 22

Automotive Products ................................................................. 22

Rev. K | Page 2 of 24

Data Sheet AD8628/AD8629/AD8630

REVISION HISTORY

8/14—Rev. J to Rev. K

Changes to Figure 36 and Figure 37 ............................................. 12

2/14—Rev. I to Rev. J

Moved Revision History ................................................................... 3

Changes to Figure 17 and Figure 18 ............................................... 9

Updated Outline Dimensions ........................................................ 20

4/11—Rev. H to Rev. I

Updated Outline Dimensions ........................................................ 19

Changes to Ordering Guide ........................................................... 21

4/10—Rev. G to Rev. H

Change to Features List .................................................................... 1

Change to General Description Section ......................................... 1

Changes to Table 3 ............................................................................ 5

Updated Outline Dimensions Section .......................................... 19

Changes to Ordering Guide ........................................................... 21

6/08—Rev. F to Rev. G

Changes to Features Section ............................................................ 1

Changes to Table 5 and Figure 42 Caption .................................. 12

Changes to 1/f Noise Section and Figure 49 ................................ 14

Changes to Figure 51 Caption and Figure 55 .............................. 15

Changes to Figure 57 Caption and Figure 58 Caption ............... 16

Changes to Figure 60 Caption and Figure 61 Caption ............... 17

Changes to Figure 64 ...................................................................... 18

2/08—Rev. E to Rev. F

Renamed TSOT-23 to TSOT ............................................ Universal

Deleted Figure 4 and Figure 6 .......................................................... 1

Changes to Figure 3 and Figure 4 Captions ................................... 1

Changes to Table 1 ............................................................................ 3

Changes to Table 2 ............................................................................ 4

Changes t o Table 4 ............................................................................ 5

Updated Outline Dimensions ........................................................ 19

Changes to Ordering Guide ........................................................... 20

5/05—Rev. D to Rev. E

Changes to Ordering Guide ........................................................... 22

1/05—Rev. C to Rev. D

Added AD8630 ................................................................... Universal

Added Figure 5 and Figure 6 ........................................................... 1

Changes to Caption in Figure 8 and Figure 9 ................................ 7

Changes to Caption in Figure 14 .................................................... 8

Changes to Figure 17 ........................................................................ 8

Changes to Figure 23 and Figure 24 ............................................... 9

Changes to Figure 25 and Figure 26 ............................................. 10

Changes to Figure 31 ...................................................................... 11

Changes to Figure 40, Figure 41, Figure 42 ................................. 12

Changes to Figure 43 and Figure 44 ............................................. 13

Changes to Figure 51 ...................................................................... 15

Updated Outline Dimensions........................................................ 20

Changes to Ordering Guide ........................................................... 20

10/04—Rev. B to Rev. C

Updated Formatting .......................................................... Universal

Added AD8629 ................................................................... Universal

Added SOIC and MSOP Pin Configurations ................................ 1

Added Figure 48 .............................................................................. 13

Changes to Figure 62 ...................................................................... 17

Added MSOP Package .................................................................... 19

Changes to Ordering Guide ........................................................... 22

10/03—Rev. A to Rev. B

Changes to General Description ..................................................... 1

Changes to Absolute Maximum Ratings........................................ 4

Changes to Ordering Guide ............................................................. 4

Added TSOT-23 Package ............................................................... 15

6/03—Rev. 0 to Rev. A

Changes to Specifications................................................................. 3

Changes to Ordering Guide ............................................................. 4

Change to Functional Description................................................ 10

Updated Outline Dimensions........................................................ 15

10/02—Revision 0: Initial Version

Rev. K | Page 3 of 24

AD8628/AD8629/AD8630 Data Sheet

Offset Voltage Drift

∆VOS/∆T

−40°C ≤ TA ≤ +125°C

0.002

0.02

µV/°C

Slew Rate

SR

RL = 10 kΩ

1.0 V/µs

5

SPECIFICATIONS

ELECTRICAL CHARACTERISTICS—VS = 5.0 V

VS = 5.0 V, VCM = 2.5 V, TA = 25°C, unless otherwise noted.

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage VOS

Input Bias Current IB

AD8628/AD8629
AD8630

Input Offset Current IOS

Input Voltage Range

Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 120 140

Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.3 V to 4.7 V 125 145

−40°C ≤ TA ≤ +125°C

−40°C ≤ TA ≤ +125°C

−40°C ≤ TA ≤ +125°C
0

−40°C ≤ TA ≤ +125°C 115 130

−40°C ≤ TA ≤ +125°C 120 135

1 5 µV

10 µV

30 100 pA
100 300 pA

1.5 nA

50 200 pA

250 pA
5 V

dB
dB
dB
dB

OUTPUT CHARACTERISTICS

Output Voltage High VOH RL = 100 kΩ to ground 4.99 4.996

Output Voltage Low VOL RL = 100 kΩ to V+

Short-Circuit Limit ISC

Output Current IO

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C 115 130
Supply Current per Amplifier ISY VO = VS/2 0.85 1.1 mA

INPUT CAPACITANCE CIN

Differential
Common Mode

DYNAMIC PERFORMANCE

Overload Recovery Time
Gain Bandwidth Product GBP

NOISE PERFORMANCE

Voltage Noise en p-p 0.1 Hz to 10 Hz

0.1 Hz to 1.0 Hz
Voltage Noise Density en f = 1 kHz
Current Noise Density in f = 10 Hz

−40°C ≤ TA ≤ +125°C 4.99 4.995

RL = 10 kΩ to ground 4.95 4.98

−40°C ≤ TA ≤ +125°C 4.95 4.97

1 5 mV

−40°C ≤ TA ≤ +125°C

RL = 10 kΩ to V+

−40°C ≤ TA ≤ +125°C
±25 ±50

−40°C ≤ TA ≤ +125°C

−40°C ≤ TA ≤ +125°C

−40°C ≤ TA ≤ +125°C

2 5 mV
10 20 mV
15 20 mV

±40
±30
±15

1.0 1.2 mA

1.5

8.0

0.05

2.5

0.5

0.16
22

V
V
V
V

mA
mA
mA
mA

dB

pF
pF

ms
MHz

µV p-p
µV p-p
nV/√Hz
fA/√Hz

Rev. K | Page 4 of 24

Data Sheet AD8628/AD8629/AD8630

Gain Bandwidth Product

GBP 2

MHz

ELECTRICAL CHARACTERISTICS—VS = 2.7 V

VS = 2.7 V, VCM = 1.35 V, VO = 1.4 V, TA = 25°C, unless otherwise noted.

Table 2.

Parameter Symbol Conditions Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage VOS 1 5 µV

−40°C ≤ TA ≤ +125°C 10 µV
Input Bias Current IB

AD8628/AD8629 30 100 pA
AD8630 100 300 pA

−40°C ≤ TA ≤ +125°C 1.0 1.5 nA
Input Offset Current IOS 50 200 pA

−40°C ≤ TA ≤ +125°C 250 pA
Input Voltage Range 0 2.7 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 2.7 V 115 130 dB

−40°C ≤ TA ≤ +125°C 110 120 dB
Large Signal Voltage Gain AVO RL = 10 kΩ, VO = 0.3 V to 2.4 V 110 140 dB

−40°C ≤ TA ≤ +125°C 105 130 dB
Offset Voltage Drift ∆VOS/∆T −40°C ≤ TA ≤ +125°C 0.002 0.02 µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High VOH RL = 100 kΩ to ground 2.68 2.695 V

−40°C ≤ TA ≤ +125°C 2.68 2.695 V
RL = 10 kΩ to ground 2.67 2.68 V

−40°C ≤ TA ≤ +125°C 2.67 2.675 V
Output Voltage Low VOL RL = 100 kΩ to V+ 1 5 mV

−40°C ≤ TA ≤ +125°C 2 5 mV
RL = 10 kΩ to V+ 10 20 mV

−40°C ≤ TA ≤ +125°C 15 20 mV
Short-Circuit Limit ISC ±10 ±15 mA

−40°C ≤ TA ≤ +125°C ±10 mA
Output Current IO ±10 mA

−40°C ≤ TA ≤ +125°C ±5 mA

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V, −40°C ≤ TA ≤ +125°C 115 130 dB
Supply Current per Amplifier ISY VO = VS/2 0.75 1.0 mA

−40°C ≤ TA ≤ +125°C 0.9 1.2 mA

INPUT CAPACITANCE CIN

Differential 1.5 pF
Common Mode 8.0 pF

DYNAMIC PERFORMANCE

Slew Rate SR RL = 10 kΩ 1 V/µs
Overload Recovery Time 0.05 ms

NOISE PERFORMANCE

Voltage Noise en p-p 0.1 Hz to 10 Hz 0.5 µV p-p
Voltage Noise Density en f = 1 kHz 22 nV/√Hz
Current Noise Density in f = 10 Hz 5 fA/√Hz

Rev. K | Page 5 of 24

AD8628/AD8629/AD8630 Data Sheet

Input Voltage

GND – 0.3 V to VS + 0.3 V

FICDM 14-Lead SOIC

±1500V

ABSOLUTE MAXIMUM RATINGS

Table 3.

Parameter Rating

Supply Voltage 6 V

Differential Input Voltage1 ±5.0 V
Output Short-Circuit Duration to GND Indefinite
Storage Temperature Range −65°C to +150°C
Operating Temperature Range −40°C to +125°C
Junction Temperature Range −65°C to +150°C
Lead Temperature (Soldering, 60 sec) 300°C
ESD AD8628

HBM 8-Lead SOIC ±7000V
FICDM 8-Lead SOIC ±1500V
FICDM 5-Lead TSOT ±1000V

MM 8-Lead SOIC ±200V

ESD AD8629

HBM 8-Lead SOIC ±4000V
FICDM 8-Lead SOIC ±1000V

ESD AD8630

HBM 14-Lead SOIC ±5000V

THERMAL CHARACTERISTICS

θJA is specified for worst-case conditions, that is, θJA is specified
for the device soldered in a circuit board for surface-mount
packages. This was measured using a standard two-layer board.

Table 4.

Package Type θ

5-Lead TSOT (UJ-5) 207 61 °C/W
5-Lead SOT-23 (RJ-5) 230 146 °C/W
8-Lead SOIC_N (R-8) 158 43 °C/W
8-Lead MSOP (RM-8) 190 44 °C/W
14-Lead SOIC_N (R-14) 105 43 °C/W
14-Lead TSSOP (RU-14) 148 23 °C/W

JA

θJC Unit

ESD CAUTION

FICDM 14-Lead TSSOP ±1500V
MM 14-Lead SOIC ±200V

1

Differential input voltage is limited to ±5 V or the supply voltage, whichever

is less.

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.

Rev. K | Page 6 of 24

Data Sheet AD8628/AD8629/AD8630

INPUT OFFSET VO

LTAGE (µV)

NUMBER OF

AMPLIFIERS

180

160

140

120

100

80

60

40

20

0
–2.5

–1.5

–0.5 0.5

1.5 2.5

02735-003

V

S

= 2.7V

T

A

= 25°C

+85°C

+25°C

–40°C

V

S

= 5V

INPUT COMMON-MODE VOLTAGE (V)

INPUT BIAS CURRE NT (pA)

60

40

50

30

10

20

0

0 1 2 3

4 5 6

02735-004

150°C

125°C

INPUT COMMON-MODE VOLTAGE (V)

INPUT BIAS CURRE NT (pA)

1500

500

1000

0

–1000

–500

–1500

0 1 2 3 4 5 6

02735-005

VS = 5V

INPUT OFFSET VOLTAGE (µV)

NUMBER OF AMPLIFIERS

100

80

90

60

70

40

50

10

20

30

0
–2.5 –1.5 –0.5 0.5 1.5 2.5

02735-006

VS = 5V
VCM = 2.5V
TA = 25°C

V

S

= 5V

T

A

= –40°C TO + 125°C

TCVOS (nV/°C)

NUMBER OF

AMPLIFIERS

7

6

5

4

3

2

1

0

0

2

4

6 8

10

02735-007

LOAD CURRENT ( mA)

OUTPUT VOLTAGE (mV)

1k

100

10

1

0.1

0.01

0.0001 0.001 0.10.01 1 10

02735-008

V

S

= 5V

T

A

= 25°C

SOURCE

SINK

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 5. Input Offset Voltage Distribution

Figure 6. AD8628 Input Bias Current vs. Input Common-Mode Voltage

Figure 8. Input Offset Voltage Distribution

Figure 9. Input Offset Voltage Drift

Figure 7. AD8628 Input Bias Current vs. Input Common-Mode Voltage

Rev. K | Page 7 of 24

Figure 10. Output Voltage to Supply Rail vs. Load Current

AD8628/AD8629/AD8630 Data Sheet

LOAD CURRENT ( mA)

OUTPUT VOLTAGE (mV)

1k

100

10

1

0.1

0.01

0.0001

0.001 0.10.01 1 10

02735-009

V

S

= 2.7V

SOURCE

SINK

VS = 5V
VCM = 2.5V
T

A

= –40°C TO + 150°C

TEMPERA

TURE (°C)

INPUT BIAS CURRE NT (pA)

1500

1

150

900

450

100

0

–50

0 25–25 50 75 100 125

150 175

02735-010

T

A

= 25

°

C

5V

2.7V

TEMPER

ATURE (°C)

SUPPLY

CURRENT (µA)

1250

1000

750

500

250

0

–50 0 50 150100 200

02735-011

T

A

= 25°C

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

1000

800

600

400

200

0

0 1 2 4 53 6

02735-012

FREQUENCY (Hz)

OPEN-LOOP GAIN (dB)

60

40

20

–20

0

10k 100k 1M 10M

02735-013

45

90
135

180

225

0

PHASE SHIFT (Degrees)

V

S

= 2.7V

C

L

= 20pF

RL = ∞

Ф

M

= 45°

GAIN

PHASE

FREQUENCY (Hz)

OPEN-LOOP

GAIN (dB)

70

60

50

40

30
20

0

–10
–20

10

–30

10k 100k 1M 10M

02735-014

45
90

135

180

225

0

PHASE SHIFT (Degrees)

V

S

= 5V
CL = 20pF
R

L

= ∞

ΦM = 52.1°

GAIN

PHASE

Figure 11. Output Voltage to Supply Rail vs. Load Current

Figure 12. AD8628 Input Bias Current vs. Temperature

Figure 14. Supply Current vs. Supply Voltage

Figure 15. Open-Loop Gain and Phase vs. Frequency

Figure 13. Supply Current vs. Temperature

Figure 16. Open-Loop Gain and Phase vs. Frequency

Rev. K | Page 8 of 24

Data Sheet AD8628/AD8629/AD8630

T

70

60

50

AV = 100

40

30

AV = 10

20

10

AV = 1

0

CLOSED-LOOP GAIN (dB)

–10

–20

–30

1k 10k 1 00k 1M 10 M

FREQUENCY (Hz)

Figure 17. Closed-Loop Gain vs. Frequency

VS = 2.7V
C

= 20pF

L

R

= 2kΩ

L

02735-015

300

VS = 5V

270

240

210

180

150

120

90

OUTPUT IMPEDANCE (Ω)

60

30

0

100 1k 10k 100k 1M 10M 100M

AV = 100

AV = 10

AV = 1

FREQUENCY (Hz)

Figure 20. Output Impedance vs. Frequency

02735-018

70

60

50

= 100

A

V

40

30

AV = 10

20

10

AV = 1

0

CLOSED-LOOP GAIN (dB)

–10

–20

–30

1k 10k 100k 1M 10M

FREQUENCY (Hz)

Figure 18. Closed-Loop Gain vs. Frequency

300

VS = 2.7V

270

240

210

180

150

120

90

OUTPUT IMPEDANCE (Ω)

60

30

0

100 1k 10k 100k 1M 10M 100M

AV = 100

= 10

A

V

FREQUENCY (Hz)

AV = 1

Figure 19. Output Impedance vs. Frequency

VS = 5V
C

= 20pF

L

R

= 2kΩ

L

VS = ±1.35V
C

= 300pF

L

R

= ∞

0V

AGE (500mV/DIV)

VOL

02735-016

L

A

V

= 1

TIME (4µs/DIV)

02735-019

Figure 21. Large Signal Transient Response

VS = ±2.5V

= 300pF

C

L

= ∞

R

0V

VOLTAGE (1V/DIV)

02735-017

L

A

V

= 1

TIME (5µs/DIV)

02735-020

Figure 22. Large Signal Transient Response

Rev. K | Page 9 of 24

AD8628/AD8629/AD8630 Data Sheet

V

S

= ±1.35V
CL = 50pF
R

L

= ∞

A

V

= 1

TIME (4µs/DIV)

VOLTAGE (50mV/DI V )

0V

02735-021

V

S

= ±2.5V
C

L

= 50pF
R

L

= ∞

A

V

= 1

TIME (4µs/DIV)

VOLTAGE (50mV/DI V )

0V

02735-022

CAPACITIVE LOAD (pF)

OVERSHOOT (%)

100

90

80

70

60
50

30

20
10

40

0

1 10 100 1k

02735-023

OS–

OS+

V

S

= ±1.35V

R

L

= 2kΩ

T

A

= 25°C

CA

PACITIVE LOAD (pF)

OVERSHOOT (%)

80

70

60

50

30

20

10

40

0

1 10 100 1k

02735-024

OS–

OS+

V

S

= ±2.5V

R

L

= 2kΩ

TA = 25°C

TIME (2µs/DIV)

VO

LTAGE (V)

V

OUT

0V

0V

V

IN

02735-025

V

S

= ±2.5V

A

V

= –50

R

L

= 10kΩ

C

L

= 0pF
CH1 = 50mV/DIV
CH2 = 1V/DIV

TIME (10µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-026

V

S

= ±2.5V

A

V

= –50
RL = 10kΩ
CL = 0pF
CH1 = 50mV/DIV
CH2 = 1V/DIV

Figure 23. Small Signal Transient Response

Figure 24. Small Signal Transient Response

Figure 26. Small Signal Overshoot vs. Load Capacitance

Figure 27. Positive Overvoltage Recovery

Figure 25. Small Signal Overshoot vs. Load Capacitance

Figure 28. Negative Overvoltage Recovery

Rev. K | Page 10 of 24

Data Sheet AD8628/AD8629/AD8630

TIME (200µ s/DIV)

VOLTAGE (1V/DIV)

0V

02735-027

V

S

= ±2.5V
VIN = 1kHz @ ±3V p-p
C

L

= 0pF

R

L

= 10kΩ

AV = 1

FREQUENCY (Hz)

CMRR (dB)

140

120

100

80

60
40

0

–20
–40

20

–60

100 1k 10k

100k 1M 10M

02735-028

VS = 2.7V

FREQUENCY (Hz)

CMRR (dB)

140

120

100

80

60
40

0

–20
–40

20

–60

100 1k 10k 100k 1M 10M

02735-029

VS = 5V

FREQUENCY (Hz)

PSRR (dB)

140

120

100

80

60
40

0

–20
–40

20

–60

100

1k

10k 100k 1M 10M

02735-030

VS = ±1.35V

+PSRR

–PSRR

FREQUENCY (Hz)

PSRR (dB)

140

120

100

80

60
40

0

–20
–40

20

–60

100 1k

10k 100k 1M 10M

02735-031

V

S

= ±2.5V

+PSRR

–PSRR

FREQUENCY (Hz)

OUTPUT SWING (V p-p)

3.0

2.5

2.0

1.5

1.0

0.5

0

100 1k 10k 100k 1M

02735-032

V

S

= 2.7V

R

L

= 10kΩ

T

A

= 25°C

A

V

= 1

Figure 29. No Phase Reversal

Figure 30. CMRR vs. Frequency

Figure 32. PSRR vs. Frequency

Figure 33. PSRR vs. Frequency

Figure 31. CMRR vs. Frequency

Figure 34. Maximum Output Swing vs. Frequency

Rev. K | Page 11 of 24

AD8628/AD8629/AD8630 Data Sheet

FREQUENCY (Hz)

OUTPUT SWING (V p-p)

5.5

2.5

3.0

3.5

4.0

4.5

5.0

2.0

1.5

1.0

0.5
0

100 1k 10k 100k 1M

02735-033

VS = 5V
R

L

= 10kΩ

T

A

= 25°C

AV = 1

TIME (1s/DIV)

VOLTAGE (µV)

0.60

0.45

0.30

0.15

–0.15

–0.30

–0.45

0

–0.60

02735-034

V

S

= 2.7V

TIME (1s/DIV)

VOLTAGE (µV)

0.60

0.45

0.30

0.15

–0.15

–0.30

–0.45

0

–0.60

02735-035

VS = 5V

FREQUENCY (kHz)

VOLTAGE NOISE DENSITY (nV/√Hz)

120

105

90

75

45

30

15

60

0

0

0.5

1.0 1.5 2.0 2.5

02735-036

VS = 2.7V
NOISEAT 1kHz = 21.3nV

FREQUENCY (kHz)

VO

LTAGE NOISE DENSITY

(nV/√Hz)

120

105

90

75

45

30

15

60

0

0 5 10 15 20 25

02735-037

V

S

= 2.7V

NOISEAT 10kHz = 42.4nV

FREQUENCY (kHz)

VO

LTAGE NOISE DENSITY (nV/√Hz)

120

105

90

75

45

30

15

60

0

0 0.5

1.0 1.5 2.0 2.5

02735-038

VS = 5V
NOISEA

T 1kHz = 22.1nV

Figure 35. Maximum Output Swing vs. Frequency

Figure 36. 0.1 Hz to 10 Hz Noise

Figure 38. Voltage Noise Density at 2.7 V from 0 Hz to 2.5 kHz

Figure 39. Voltage Noise Density at 2.7 V from 0 Hz to 25 kHz

Figure 37. 0.1 Hz to 10 Hz Noise

Figure 40. Voltage Noise Density at 5 V from 0 Hz to 2.5 kHz

Rev. K | Page 12 of 24

Data Sheet AD8628/AD8629/AD8630

FREQUENCY (kHz)

VOLTAGE NOISE DENSITY (nV/√Hz)

120

105

90

75

45

30

15

60

0

0 5 10 15 20 25

02735-039

VS = 5V
NOISEAT 10kHz = 36.4nV

FREQUENC

Y (kHz)

VOLTAGE NOISE DENSITY (nV/√Hz)

120

105

90

75

45

30

15

60

0

0 5 10

02735-040

V

S

= 5V

V

S

= 2.7V TO 5V

TA = –40°C T

O +125°C

TEMPERATURE (°C)

POWER SUPPLY REJECTION (dB)

150

130

120

140

110

100

90

60

70

80

50

–50 0 25–25 50 75 100 125

02735-041

TEMPER

ATURE (°C)

OUTPUT SHOR

T

-CIRCUIT CURRENT (mA)

150

100

50

0

–50

–100

–50 25

50 75

0

–25 100 125 150 175

02735-042

V

S

= 2.7V

TA = –40°C

T

O +150°C

I

SC

–

I

SC

+

TEMPERATURE (°C)

OUTPUT SHORT-CIRCUIT CURRENT ( mA)

150

100

50

0

–50

–100

–50 25 50 75

0–25 100

125 150 175

02735-043

V

S

= 5V

T

A

= –40°C TO + 150°C

I

SC

–

I

SC

+

TEMPERATURE (°C)

OUTPUT-TO-RAIL VOLTAGE (mV)

1k

100

10

1

0.1

–50 25 50 750–25 100 125

150 175

02735-044

VS = 5V

VCC– VOH@ 1kΩ

V

CC

– VOH@ 10kΩ

V

CC

– VOH@ 100kΩ

V

O

L

– VEE@ 1kΩ

VOL– VEE@ 10kΩ

V

OL

– VEE@ 100kΩ

Figure 41. Voltage Noise Density at 5 V from 0 Hz to 25 kHz

Figure 42. Voltage Noise Density at 5 V from 0 Hz to 10 kHz

Figure 44. Output Short-Circuit Current vs. Temperature

Figure 45. Output Short-Circuit Current vs. Temperature

Figure 43. Power Supply Rejection vs. Temperature

Figure 46. Output-to-Rail Voltage vs. Temperature

Rev. K | Page 13 of 24

AD8628/AD8629/AD8630 Data Sheet

TEMPERATURE (°C)

OUTPUT-TO-RAIL VOLTAGE (mV)

1k

100

10

1

0.1

–50 25 50 750

–25 100 125 150 175

02735-045

V

S

= 2.7V

V

CC

– VOH@ 1kΩ

VCC– V

OH

@ 10kΩ

VCC– VOH@ 100kΩ

V

OL

– V

EE

@ 1kΩ

V

O

L

– V

EE

@ 10kΩ

V

OL

– VEE@ 100kΩ

FREQUENCY

(Hz)

CHANNEL SEPARATION (dB)

140

120

100

80

60

40

20

0

1k 10k

100k 1M 10M

02735-062

V

OUT

V

IN

28mV p-p

–2.5V

+2.5V

R1

10kΩ

V–

V+

–

+

V+

V–

A

B

R2

100Ω

VS = ±2.5V

Figure 47. Output-to-Rail Voltage vs. Temperature

Figure 48. AD8629/AD8630 Channel Separation vs. Frequency

Rev. K | Page 14 of 24

Data Sheet AD8628/AD8629/AD8630

02735-046

MK AT 1kHz FO R ALL 3 GRAPHS

FREQUENCY (kHz )

VOLTAGE NOISE DENSITY (nV/√Hz)

120

105

90

75

60

45

30

15

0

0 42 86

10 12

COMPETITOR A

(89.7nV/√Hz)

COMPETITOR B

(31.1nV/√Hz)

AD8628

(19.4nV/√Hz)

FUNCTIONAL DESCRIPTION

The AD8628/AD8629/AD8630 are single-supply, ultrahigh
precision rail-to-rail input and output operational amplifiers.
The typical offset voltage of less than 1 µV allows these amplifiers
to be easily configured for high gains without risk of excessive
output voltage errors. The extremely small temperature drift
of 2 nV/°C ensures a minimum offset voltage error over their
entire temperature range of −40°C to +125°C, making these
amplifiers ideal for a variety of sensitive measurement applica­tions in harsh operating environments.

The AD8628/AD8629/AD8630 achieve a high degree of precision
through a patented combination of auto-zeroing and chopping.
This unique topology allows the AD8628/AD8629/AD8630 to
maintain their low offset voltage over a wide temperature range
and over their operating lifetime. The AD8628/AD8629/AD8630
also optimize the noise and bandwidth over previous generations
of auto-zero amplifiers, offering the lowest voltage noise of any
auto-zero amplifier by more than 50%.

Previous designs used either auto-zeroing or chopping to add
precision to the specifications of an amplifier. Auto-zeroing
results in low noise energy at the auto-zeroing frequency, at the
expense of higher low frequency noise due to aliasing of wideband
noise into the auto-zeroed frequency band. Chopping results in
lower low frequency noise at the expense of larger noise energy
at the chopping frequency. The AD8628/AD8629/AD8630
family uses both auto-zeroing and chopping in a patented ping­pong arrangement to obtain lower low frequency noise together
with lower energy at the chopping and auto-zeroing frequencies,
maximizing the signal-to-noise ratio for the majority of
applications without the need for additional filtering. The
relatively high clock frequency of 15 kHz simplifies filter
requirements for a wide, useful noise-free bandwidth.

The AD8628 is among the few auto-zero amplifiers offered in
the 5-lead TSOT package. This provides a significant improvement
over the ac parameters of the previous auto-zero amplifiers. The

AD8628/AD8629/AD8630 have low noise over a relatively wide

bandwidth (0 Hz to 10 kHz) and can be used where the highest
dc precision is required. In systems with signal bandwidths of
from 5 kHz to 10 kHz, the AD8628/AD8629/AD8630 provide
true 16-bit accuracy, making them the best choice for very high
resolution systems.

1/f NOISE

1/f noise, also known as pink noise, is a major contributor to
errors in dc-coupled measurements. This 1/f noise error term
can be in the range of several µV or more, and, when amplified
with the closed-loop gain of the circuit, can show up as a large
output offset. For example, when an amplifier with a 5 µV p-p
1/f noise is configured for a gain of 1000, its output has 5 mV of
error due to the 1/f noise. However, the AD8628/AD8629/AD8630
eliminate 1/f noise internally, thereby greatly reducing output errors.

The internal elimination of 1/f noise is accomplished as follows.
1/f noise appears as a slowly varying offset to the AD8628/AD8629/

AD8630 inputs. Auto-zeroing corrects any dc or low frequency

offset. Therefore, the 1/f noise component is essentially removed,
leaving the AD8628/AD8629/AD8630 free of 1/f noise.

One advantage that the AD8628/AD8629/AD8630 bring to
system applications over competitive auto-zero amplifiers is their
very low noise. The comparison shown in
an input-referred noise density of 19.4 nV/√Hz at 1 kHz for
the AD8628, which is much better than the Competitor A
and Competitor B. The noise is flat from dc to 1.5 kHz, slowly
increasing up to 20 kHz. The lower noise at low frequency is
desirable where auto-zero amplifiers are widely used.

Figure 49. Noise Spectral Density of AD8628 vs. Competition

Figure 49 indicates

Rev. K | Page 15 of 24

AD8628/AD8629/AD8630 Data Sheet

en p-p = 0.5µV
BW = 0.1Hz TO 10Hz

TIME (1s/DIV)

VOLTAGE (0.5µV/DIV)

02735-047

e

n

p-p = 2.3µV

BW = 0.1Hz

T

O 10Hz

TIME (1s/DIV)

VOLT

AGE (0.5µV /DIV)

02735-048

470pF

OUT

100kΩ

IN

1kΩ

02735-049

FREQUENC

Y

(kHz)

NOISE (dB)

50

45

40

35

30
25

15

10

5

20

0

0 30

60 100

9080

70

50402010

02735-050

FREQUENCY (kHz)

NOISE (dB)

50

45

40

35

30
25

15

10

5

20

0

0 30 60

1009080

7050402010

02735-051

3dB FIL TER BANDWIDTH ( Hz )

RMS NOISE (µV)

10

1

0.1

10 100 10k1k

02735-052

COMPETITOR A

AD8551

AD8628

PEAK-TO-PEAK NOISE

Because of the ping-pong action between auto-zeroing and
chopping, the peak-to-peak noise of the AD8628/AD8629/

AD8630 is much lower than the competition. Figure 50 and

Figure 51 show this comparison.

Figure 51. Competitor A Peak-to-Peak Noise

NOISE BEHAVIOR WITH FIRST-ORDER, LOW-PASS FILTER

The AD8628 was simulated as a low-pass filter (see Figure 53)
and then configured as shown in Figure 52. The behavior of the

AD8628 matches the simulated data. It was verified that noise is

rolled off by first-order filtering. Figure 53 and Figure 54 show
the difference between the simulated and actual transfer functions
of the circuit shown in Figure 52.

Figure 52. First-Order Low-Pass Filter Test Circuit,

Figure 50. AD8628 Peak-to-Peak Noise

×101 Gain and 3 kHz Corner Frequency

Figure 53. Simulation Transfer Function of the Test Circuit in Figure 52

Figure 54. Actual Transfer Function of the Test Circuit in Figure 52

The measured noise spectrum of the test circuit charted in
Figure 54 shows that noise between 5 kHz and 45 kHz is
successfully rolled off by the first-order filter.

TOTAL INTEGRATED INPUT-REFERRED NOISE FOR

Rev. K | Page 16 of 24

FIRST-ORDER FILTER

For a first-order filter, the total integrated noise from the

AD8628 is lower than the noise of Competitor A.

Figure 55. RMS Noise vs. 3 dB Filter Bandwidth in Hz

Data Sheet AD8628/AD8629/AD8630

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-053

CH1 = 50mV/DIV
CH2 = 1V/DIV
A

V

= –50

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-054

CH1 = 50mV/DIV
CH2 = 1V/DIV
A

V

= –50

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-055

CH1 = 50mV/DIV
CH2 = 1V/DIV
A

V

= –50

INPUT OVERVOLTAGE PROTECTION

Although the AD8628/AD8629/AD8630 are rail-to-rail input
amplifiers, care should be taken to ensure that the potential
difference between the inputs does not exceed the supply voltage.
Under normal negative feedback operating conditions, the
amplifier corrects its output to ensure that the two inputs are at
the same voltage. However, if either input exceeds either supply
rail by more than 0.3 V, large currents begin to flow through the
ESD protection diodes in the amplifier.

These diodes are connected between the inputs and each supply
rail to protect the input transistors against an electrostatic discharge
event, and they are normally reverse-biased. However, if the input
voltage exceeds the supply voltage, these ESD diodes can become
forward-biased. Without current limiting, excessive amounts
of current could flow through these diodes, causing permanent
damage to the device. If inputs are subject to overvoltage,
appropriate series resistors should be inserted to limit the diode
current to less than 5 mA maximum.

OUTPUT PHASE REVERSAL

Output phase reversal occurs in some amplifiers when the input
common-mode voltage range is exceeded. As common-mode
voltage is moved outside the common-mode range, the outputs of
these amplifiers can suddenly jump in the opposite direction to
the supply rail. This is the result of the differential input pair
shutting down, causing a radical shifting of internal voltages
that results in the erratic output behavior.

The AD8628/AD8629/AD8630 amplifiers have been carefully
designed to prevent any output phase reversal, provided that
both inputs are maintained within the supply voltages. If one or
both inputs could exceed either supply voltage, a resistor should
be placed in series with the input to limit the current to less than
5 mA. This ensures that the output does not reverse its phase.

Figure 56. Positive Input Overload Recovery for the AD8628

Figure 57. Positive Input Overload Recovery for Competitor A

OVERLOAD RECOVERY TIME

Many auto-zero amplifiers are plagued by a long overload recovery
time, often in ms, due to the complicated settling behavior of
the internal nulling loops after saturation of the outputs. The

AD8628/AD8629/AD8630 have been designed so that internal

settling occurs within two clock cycles after output saturation
occurs. This results in a much shorter recovery time, less
than 10 µs, when compared to other auto-zero amplifiers. The
wide bandwidth of the AD8628/AD8629/AD8630 enhances
performance when the parts are used to drive loads that inject
transients into the outputs. This is a common situation when an
amplifier is used to drive the input of switched capacitor ADCs.

Figure 58. Positive Input Overload Recovery for Competitor B

Rev. K | Page 17 of 24

AD8628/AD8629/AD8630 Data Sheet

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-056

CH1 = 50mV/DIV
CH2 = 1V/DIV
A

V

= –50

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-057

CH1 = 50mV/DIV
CH2 = 1V/DIV
AV = –50

TIME (500µ s/DIV)

VOLTAGE (V)

V

OUT

0V

0V

V

IN

02735-058

CH1 = 50mV/DIV
CH2 = 1V/DIV
AV = –50

5V

100kΩ10kΩ

5V

100µV TO 300µV

100Ω

TO BIAS

VOLTAGE

10kΩ

f

C

≈ 1.6Hz

IR

DETECTOR

100kΩ

10µF

1/2 AD8629

1/2 AD8629

02735-059

The results shown in Figure 56 to Figure 61 are summarized in
Table 5.

Table 5. Overload Recovery Time

Figure 59. Negative Input Overload Recovery for the AD8628

Positive Overload

Model

Recovery (µs)

AD8628 6 9

Competitor A 650 25,000
Competitor B 40,000 35,000

INFRARED SENSORS

Infrared (IR) sensors, particularly thermopiles, are increasingly
being used in temperature measurement for applications as wide
ranging as automotive climate control, human ear thermometers,
home insulation analysis, and automotive repair diagnostics.
The relatively small output signal of the sensor demands high
gain with very low offset voltage and drift to avoid dc errors.

If interstage ac coupling is used, as in Figure 62, low offset and
drift prevent the output of the input amplifier from drifting close to
saturation. The low input bias currents generate minimal errors
from the output impedance of the sensor. As with pressure sensors,
the very low amplifier drift with time and temperature eliminate
additional errors once the temperature measurement is calibrated.
The low 1/f noise improves SNR for dc measurements taken
over periods often exceeding one-fifth of a second.

Figure 62 shows a circuit that can amplify ac signals from 100 µV to
300 µV up to the 1 V to 3 V levels, with a gain of 10,000 for
accurate analog-to-digital conversion.

Negative Overload
Recovery (µs)

Figure 60. Negative Input Overload Recovery for Competitor A

Figure 61. Negative Input Overload Recovery for Competitor B

Figure 62. AD8629 Used as Preamplifier for Thermopile

Rev. K | Page 18 of 24

Data Sheet AD8628/AD8629/AD8630



V

V

PRECISION CURRENT SHUNT SENSOR

A precision current shunt sensor benefits from the unique
attributes of auto-zero amplifiers when used in a differencing
configuration, as shown in Figure 63. Current shunt sensors are
used in precision current sources for feedback control systems.
They are also used in a variety of other applications, including
battery fuel gauging, laser diode power measurement and control,
torque feedback controls in electric power steering, and precision
power metering.

R

SUPPLY

e = 1000 RSI

100mV/m A

100Ω100kΩ

C
5V

S

0.1Ω

I

AD8628

100Ω100kΩ

C

Figure 63. Low-Side Current Sensing

In such applications, it is desirable to use a shunt with very low
resistance to minimize the series voltage drop; this minimizes
wasted power and allows the measurement of high currents
while saving power. A typical shunt might be 0.1 Ω. At measured
current values of 1 A, the output signal of the shunt is hundreds
of millivolts, or even volts, and amplifier error sources are not
critical. However, at low measured current values in the 1 mA
range, the 100 μV output voltage of the shunt demands a very
low offset voltage and drift to maintain absolute accuracy. Low
input bias currents are also needed, so that injected bias current
does not become a significant percentage of the measured current.
High open-loop gain, CMRR, and PSRR help to maintain the
overall circuit accuracy. As long as the rate of change of the
current is not too fast, an auto-zero amplifier can be used with
excellent results.

R

L

02735-060

OUTPUT AMPLIFIER FOR HIGH PRECISION DACS

The AD8628/AD8629/AD8630 are used as output amplifiers for
a 16-bit high precision DAC in a unipolar configuration. In this
case, the selected op amp needs to have a very low offset voltage
(the DAC LSB is 38 μV when operated with a 2.5 V reference)
to eliminate the need for output offset trims. The input bias
current (typically a few tens of picoamperes) must also be very
low because it generates an additional zero code error when
multiplied by the DAC output impedance (approximately 6 kΩ).

Rail-to-rail input and output provide full-scale output with very
little error. The output impedance of the DAC is constant and
code independent, but the high input impedance of the AD8628/

AD8629/AD8630 minimizes gain errors. The wide bandwidth

of the amplifiers also serves well in this case. The amplifiers,
with settling time of 1 μs, add another time constant to the
system, increasing the settling time of the output. The settling
time of the AD5541 is 1 μs. The combined settling time is
approximately 1.4 μs, as can be derived from the following
equation:

SERIAL

INTERFACE

*AD5542 ONLY



5

0.1µF

V

DD

CS

DIN

SCLK

LDAC*

DGND

2





tDACtTOTALt 

SSS

2.5
10µF

0.1µF

REF(REFF*) REFS*

AD5541/AD5542

AGND

Figure 64. AD8628 Used as an Output Amplifier

AD8628

V

OUT

2

AD8628

UNIPOLAR

OUTPUT

02735-061

Rev. K | Page 19 of 24

AD8628/AD8629/AD8630 Data Sheet

0

0

OUTLINE DIMENSIONS

5.00(0.1968)

4.80(0.1890)

85

1

4

6.20 (0.2441)

5.80 (0.2284)

1.60 BSC

2.90 BSC

54

2.80 BSC

123

4.00 (0.1574)

3.80 (0.1497)

0.95 BSC

*

0.90 MAX

0.70 MIN

0.10 MAX

1.90

BSC

*

1.00 MAX

0.50

0.30

*

COMPLIANT TO JEDEC STANDARDS MO-193-AB WIT H
THE EXCEPT ION OF P A CKAGE HEIGHT AND THICKNESS .

SEATING
PLANE

0.20

0.08
8°

4°
0°

Figure 65. 5-Lead Thin Small Outline Transistor Package [TSOT]

(UJ-5)

Dimensions shown in millimeters

3.00

2.90

2.80

.15 MAX
.05 MIN

1.30

1.15

0.90

1.70

1.60

1.50

5

123

4

3.00

2.80

2.60

0.95 BSC

1.90
BSC

SEATING
PLANE

0.20 MAX

0.08 MIN

1.45 MAX

0.95 MIN

0.50 MAX

0.35 MIN

COMPLIANT TO JEDEC STANDARDS MO-178-AA

10°

5°
0°

Figure 66. 5-Lead Small Outline Transistor Package [SOT-23]

(RJ-5)

Dimensions shown in millimeters

0.60

BSC

0.60

0.45

0.30

0.55

0.45

0.35

1.27 (0.0500)
BSC

0.25 (0.0098)

0.10 (0.0040)

COPLANARITY

0.10
SEATING

PLANE

CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES)ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR

100708-A

REFERENCE ONLYAND ARE NOT APPROPRIATEFOR USE IN DESIGN.

COMPLIANT TO JEDEC STANDARDS MS-012-AA

1.75 (0.0688)

1.35 (0.0532)

0.51 (0.0201)

0.31 (0.0122)

8°
0°

0.25 (0.0098)

0.17 (0.0067)

0.50 (0.0196)

0.25 (0.0099)

1.27 (0.0500)

0.40 (0.0157)

45°

012407-A

Figure 67. 8-Lead Standard Small Outline Package [SOIC_N]

Narrow Body

(R-8)

Dimensions shown in millimeters and (inches)

3.20

3.00

2.80

8

5

3.20

3.00

2.80

PIN 1

IDENTIFIER

1

5.15

4.90

4.65

4

0.65 BSC

0.95

0.85

0.75

0.15

0.05

COPLANARITY

11-01-2010-A

0.10

COMPLI ANT TO JEDE C STANDARDS MO-187- AA

0.40

0.25

1.10 MAX

15° MAX

6°
0°

0.23

0.09

0.80

0.55

0.40

10-07-2009-B

Figure 68. 8-Lead Mini Small Outline Package [MSOP]

(RM-8)

Dimensions shown in millimeters

Rev. K | Page 20 of 24

Data Sheet AD8628/AD8629/AD8630

8.75 (0.3445)

8.55 (0.3366)

BSC

8

7

6.20 (0.2441)

5.80 (0.2283)

1.75 (0.0689)

1.35 (0.0531)

SEATING
PLANE

8°
0°

0.25 (0.0098)

0.17 (0.0067)

4.00 (0.1575)

3.80 (0.1496)

0.25 (0.0098)

0.10 (0.0039)

COPLANARITY

0.10

14
1

1.27 (0.0500)

0.51 (0.0201)

0.31 (0.0122)

CONTROLL ING DIMENSI ONS ARE IN M I L LIMETERS ; I NCH DIMENSIONS
(IN PARENTHESES) ARE RO UNDED-OFF MI LLIMET ER EQUIVALENTS FOR
REFERENCE ON LY AND ARE NOT APPROPRIATE FOR USE IN DES I GN.

COMPLIANT TO JEDEC STANDARDS MS-012-AB

Figure 69. 14-Lead Standard Small Outline Package [SOIC_N]

Narrow Body (R-14)

Dimensions shown in millimeters and (inches)

0.50 (0.0197)

0.25 (0.0098)

1.27 (0.0500)

0.40 (0.0157)

5.10

5.00

4.90

14

4.50

4.40

4.30

45°

1.05

1.00

0.80

060606-A

COPLANARITY

PIN 1

0.15

0.05

0.10

1

0.65 BSC

0.30

0.19

COMPLIANT TO JEDEC STANDARDS MO-153-AB-1

8

6.40
BSC

7

1.20

0.20

MAX

SEATING
PLANE

0.09
8°

0°

0.75

0.60

0.45

061908-A

Figure 70. 14-Lead Thin Shrink Small Outline Package [TSSOP]

(RU-14)

Dimensions shown in millimeters

Rev. K | Page 21 of 24

AD8628/AD8629/AD8630 Data Sheet

Model

Temperature Range

Package Description

Package Option

Branding

AD8628WARTZ-RL

−40°C to +125°C

5-Lead SOT-23

RJ-5

A0L

AD8630ARUZ

−40°C to +125°C

14-Lead TSSOP

RU-14

ORDERING GUIDE

1, 2

AD8628AUJ-REEL −40°C to +125°C 5-Lead TSOT UJ-5 AYB
AD8628AUJ-REEL7 −40°C to +125°C 5-Lead TSOT UJ-5 AYB
AD8628AUJZ-R2 −40°C to +125°C 5-Lead TSOT UJ-5 A0L
AD8628AUJZ-REEL −40°C to +125°C 5-Lead TSOT UJ-5 A0L
AD8628AUJZ-REEL7 −40°C to +125°C 5-Lead TSOT UJ-5 A0L
AD8628ARZ −40°C to +125°C 8-Lead SOIC_N R-8
AD8628ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8
AD8628ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8
AD8628ARTZ-R2 −40°C to +125°C 5-Lead SOT-23 RJ-5 A0L
AD8628ARTZ-REEL7 −40°C to +125°C 5-Lead SOT-23 RJ-5 A0L
AD8628WARZ-RL −40°C to +125°C 8-Lead SOIC_N R-8 A0L
AD8628WARZ-R7 −40°C to +125°C 8-Lead SOIC_N R-8 A0L

AD8628WARTZ-R7 −40°C to +125°C 5-Lead SOT-23 RJ-5 A0L
AD8628WAUJZ-RL −40°C to +125°C 5-Lead TSOT UJ-5 A0L
AD8628WAUJZ-R7 −40°C to +125°C 5-Lead TSOT UJ-5 A0L
AD8629ARZ −40°C to +125°C 8-Lead SOIC_N R-8
AD8629ARZ-REEL −40°C to +125°C 8-Lead SOIC_N R-8
AD8629ARZ-REEL7 −40°C to +125°C 8-Lead SOIC_N R-8
AD8629ARMZ −40°C to +125°C 8-Lead MSOP RM-8 A06
AD8629ARMZ-REEL −40°C to +125°C 8-Lead MSOP RM-8 A06
AD8629WARZ-RL −40°C to +125°C 8-Lead SOIC_N R-8
AD8629WARZ-R7 −40°C to +125°C 8-Lead SOIC_N R-8

AD8630ARUZ-REEL −40°C to +125°C 14-Lead TSSOP RU-14
AD8630ARZ −40°C to +125°C 14-Lead SOIC_N R-14
AD8630ARZ-REEL −40°C to +125°C 14-Lead SOIC_N R-14
AD8630ARZ-REEL7 −40°C to +125°C 14-Lead SOIC_N R-14
AD8630WARZ-RL −40°C to +125°C 14-Lead SOIC_N R-14
AD8630WARZ-R7 −40°C to +125°C 14-Lead SOIC_N R-14

1

Z = RoHS Compliant Part.

2

W = Qualified for Automotive Applications.

AUTOMOTIVE PRODUCTS

The AD8628W/AD8629W/AD8630W models are available with controlled manufacturing to support the quality and reliability
requirements of automotive applications. Note that these automotive models may have specifications that differ from the commercial
models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade products
shown are available for use in automotive applications. Contact your local Analog Devices account representative for specific product
ordering information and to obtain the specific Automotive Reliability reports for these models.

Rev. K | Page 22 of 24

Data Sheet AD8628/AD8629/AD8630

NOTES

Rev. K | Page 23 of 24

AD8628/AD8629/AD8630 Data Sheet

©2002–2014 Analog Devices, Inc. All rights reserved. Trademarks and

NOTES

registered trademarks are the property of their respective owners.
D02735-0-8/14(K)

Rev. K | Page 24 of 24