Analog Devices AD8602 Datasheet

Precision CMOS Single Supply

ⴚIN A
ⴙIN A

Vⴚ

OUT B
ⴚIN B
+IN B

V+

1

45

8

AD8602

OUT A

Rail-to-Rail Input/Output Wideband

a

FEATURES
Low Offset Voltage: 500 ␮V Max
Single Supply Operation: 2.7 V to 6 V
Low Supply Current: 750 ␮A/Amplifier
Wide Bandwidth: 8 MHz
Slew Rate: 5 V/␮s
Low Distortion
No Phase Reversal
Low Input Currents
Unity Gain Stable

APPLICATIONS
Barcode Scanners
Battery-Powered Instrumentation
Multipole Filters
Sensors
Current Sensing
ASIC Input or Output Amplifier
Audio

GENERAL DESCRIPTION

The AD8601 and AD8602 are single and dual rail-to-rail input
and output single supply amplifiers featuring very low offset voltage
and wide signal bandwidth. These amplifiers use a new, patented
trimming technique that achieves superior performance without
laser trimming. All are fully specified to operate from 3 V to 5 V
single supply.

The combination of low offsets, very low input bias currents, and
high speed make these amplifiers useful in a wide variety of applica­tions. Filters, integrators, diode amplifiers, shunt current sensors,
and high impedance sensors all benefit from the combination of
performance features. Audio and other ac applications benefit from
the wide bandwidth and low distortion. For the most cost-sensitive
applications the D grades offer this ac performance with lower dc
precision at a lower price point.

Applications for these amplifiers include audio amplification for
portable devices, portable phone headsets, bar code scanners,
portable instruments, and multipole filters.

Operational Amplifiers

AD8601/AD8602

FUNCTIONAL BLOCK DIAGRAMS

5-Lead SOT-23

(RT Suffix)

OUT A

1

2

Vⴚ

AD8601

+IN

3

8-Lead ␮SOIC

(RM Suffix)

8-Lead SOIC

(R Suffix)

OUT A

1

ⴚIN A

2

Vⴚ

AD8602

3

4

+IN A

The ability to swing rail-to-rail at both the input and output
enables designers to buffer CMOS ADCs, DACs, ASICs, and
other wide output swing devices in single supply systems.

The AD8601 and AD8602 are specified over the extended industrial
(–40°C to +125°C) temperature range. The AD8601, single, is avail-
able in the tiny 5-lead SOT-23 package. The AD8602, dual, is avail­able in 8-lead MSOP and narrow SOIC surface-mount packages.

SOT and µSOIC versions are available in tape and reel only.

V+

5

ⴚIN

4

V+

8

OUT B

7

6

ⴚIN B

+IN B

5

REV. 0

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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 2000

AD8601/AD8602–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

(VS = 3 V, VCM = VS/2, TA = 25ⴗC unless otherwise noted)

A Grade D Grade

Parameter Symbol Conditions Min Typ Max Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage V

Input Bias Current I

Input Offset Current I

OS

B

OS

0 V ≤ VCM ≤ 1.3 V 80 500 6,000 µV

–40°C ≤ T
–40°C ≤ T

0 V ≤ V

–40°C ≤ T
–40°C ≤ T

≤ +85°C 700 7,000 µV

A

≤ +125°C 1,100 7,000 µV

A

1

≤ 3 V

CM

≤ +85°C 1,800 7,000 µV

A

≤ +125°C 2,100 7,000 µV

A

350 750 6,000 µV

0.2 60 0.2 200 pA

–40°C ≤ T
–40°C ≤ T

≤ +85°C 100 200 pA

A

≤ +125°C 1,000 1,000 pA

A

0.1 30 0.1 100 pA

–40°C ≤ T
–40°C ≤ T

≤ +85°C 50 100 pA

A

≤ +125°C 500 500 pA

A

Input Voltage Range 0 3 0 3 V
Common-Mode Rejection Ratio CMRR V
Large Signal Voltage Gain A

VO

= 0 V to 3 V 68 83 52 65 dB

CM

VO = 0.5 V to 2.5 V

= 2 kΩ , V

R

L

= 0 V 30 100 20 60 V/mV

CM

Offset Voltage Drift ∆VOS/∆T22µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

Output Current I
Closed-Loop Output Impedance Z

OH

OL

OUT

OUT

IL = 1.0 mA 2.92 2.96 2.92 2.96 V

–40°C ≤ T

≤ +125°C 2.88 2.88 V

A

IL = 1.0 mA 20 35 20 35 mV

–40°C ≤ T

≤ +125°C50 50mV

A

±30 ±30 mA

f = 1 MHz, AV = 1 12 12 Ω

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 67 80 56 72 dB
Supply Current/Amplifier I

SY

VO = 0 V 680 1,000 680 1,000 µA
–40°C ≤ TA ≤ +125°C 1,300 1,300 µA

DYNAMIC PERFORMANCE

Slew Rate SR RL = 2 kΩ 5.2 5.2 V/µs
Settling Time t

S

To 0.01% <0.5 <0.5 µs

Gain Bandwidth Product GBP 8.2 8.2 MHz
Phase Margin Φo 50 50 Degrees

NOISE PERFORMANCE

Voltage Noise Density e

Current Noise Density i

NOTES

1

For VCM between 1.3 V and 1.8 V, VOS may exceed specified value.

Specifications subject to change without notice.

n

e

n

n

f = 1 kHz 33 33 nV/√Hz
f = 10 kHz 18 18 nV/√Hz

0.05 0.05 pA/√Hz

–2–

REV. 0

AD8601/AD8602

ELECTRICAL CHARACTERISTICS

(VS = 5.0 V, VCM = VS/2, TA = 25ⴗC unless otherwise noted)

A Grade D Grade

Parameter Symbol Conditions Min Typ Max Min Typ Max Unit

INPUT CHARACTERISTICS

Offset Voltage V

Input Bias Current I

Input Offset Current I

OS

B

OS

0 V ≤ VCM ≤ 5 V 80 500 6,000 µV

–40°C ≤ T

≤ +125°C 1,300 7,000 µV

A

0.2 60 0.2 200 pA

–40°C ≤ T
–40°C ≤ T

≤ +85°C 100 200 pA

A

≤ +125°C 1,000 1,000 pA

A

0.1 30 0.1 100 pA

–40°C ≤ T
–40°C ≤ T

≤ +85°C 50 100 pA

A

≤ +125°C 500 500 pA

A

Input Voltage Range 0 5 0 5 V
Common-Mode Rejection Ratio CMRR VCM = 0 V to 5 V 74 89 56 67 dB
Large Signal Voltage Gain A

VO

VO = 0.5 V to 4.5 V 30 100 20 60 V/mV
R

= 2 kΩ, VCM = 0 V

L

Offset Voltage Drift ∆VOS/∆T22µV/°C

OUTPUT CHARACTERISTICS

Output Voltage High V

Output Voltage Low V

Output Current I
Closed-Loop Output Impedance Z

OH

OL

OUT

OUT

IL = 1.0 mA 4.925 4.975 4.925 4.975 V
I

= 10 mA 4.7 4.77 4.7 4.77 V

L

–40°C ≤ T

≤ +125°C 4.6 4.6 V

A

IL = 1.0 mA 15 30 15 30 mV
I

= 10 mA 125 175 125 175 mV

L

–40°C ≤ T

≤ +125°C 250 250 mV

A

±50 ±50 mA

f = 1 MHz, AV = 1 10 10 Ω

POWER SUPPLY

Power Supply Rejection Ratio PSRR VS = 2.7 V to 5.5 V 67 80 56 72 dB
Supply Current/Amplifier I

SY

VO = 0 V 750 1,200 750 1,200 µA
–40°C ≤ TA ≤ +125°C 1,500 1,500 µA

DYNAMIC PERFORMANCE

Slew Rate SR RL = 2 kΩ 66V/µs
Settling Time t

S

To 0.01% < 1.0 < 1.0 µs

Full Power Bandwidth BWp < 1% Distortion 360 360 kHz
Gain Bandwidth Product GBP 8.4 8.4 MHz
Phase Margin Φo 55 55 Degrees

NOISE PERFORMANCE

Voltage Noise Density e

e

Current Noise Density i

Specifications subject to change without notice.

n

n

n

f = 1 kHz 33 33 nV/√Hz
f = 10 kHz 18 18 nV/√Hz
f = 1 kHz 0.05 0.05 pA/√Hz

–3–REV. 0

AD8601/AD8602

WARNING!

ESD SENSITIVE DEVICE

ABSOLUTE MAXIMUM RATINGS*

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V

S

Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . ±6 V

Storage Temperature Range

R, RM, RT Packages . . . . . . . . . . . . . . . . –65°C to +150°C

Operating Temperature Range

AD8601/AD8602 . . . . . . . . . . . . . . . . . . . –40°C to +125°C

Junction Temperature Range

R, RM, RT Packages . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Range (Soldering, 60 sec) . . . . . . . . 300°C

ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kV HBM

*Stresses above those listed under Absolute Maximum Ratings may cause perma-

nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi­tions for extended periods may affect device reliability.

ORDERING GUIDE

Temperature Package Package Branding

Model Range Description Option Information

AD8601ART –40°C to +125°C 5-Lead SOT-23 RT-5 AAA
AD8601DRT –40°C to +125°C 5-Lead SOT-23 RT-5 AAD
AD8602AR –40°C to +125°C 8-Lead SOIC SO-8
AD8602DR –40°C to +125°C 8-Lead SOIC SO-8
AD8602ARM –40°C to +125°C 8-Lead MSOP RM-8 ABA
AD8602DRM –40°C to +125°C 8-Lead MSOP RM-8 ABD

Package Type ␪JA* ␪

JC

Unit

5-Lead SOT-23 (RT) 230 92 °C/W
8-Lead SOIC (R) 158 43 °C/W
8-Lead MSOP (RM) 210 45 °C/W

*θJA is specified for worst-case conditions, i.e., θ

socket for PDIP packages; θ
board for surface mount packages.

is specified for device soldered onto a circuit

JA

is specified for device in

JA

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
the AD8601/AD8602 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.

–4–

REV. 0

3,000

TCVOS – ␮V/ⴗC

60

30

0

0101

QUANTITY – Amplifiers

23456789

50

40

20

10

VS = 5V
T

A

= 25ⴗC TO 85ⴗC

VS = 3V

= 25ⴗC

T

A

2,500

V

= 0V TO 3V

CM

2,000

1,500

1,000

QUANTITY – Amplifiers

500

Typical Performance Characteristics–

AD8601/AD8602

0

ⴚ1.0

ⴚ0.6 ⴚ0.4 ⴚ0.2

ⴚ0.8

INPUT OFFSET VOLTAGE – mV

TPC 1. Input Offset Voltage Distribution

3,000

VS = 5V

= 25ⴗC

T

A

2,500

V

= 0V TO 5V

CM

2,000

1,500

1,000

QUANTITY – Amplifiers

500

0

ⴚ1.0

ⴚ0.6 ⴚ0.4 ⴚ0.2

ⴚ0.8

INPUT OFFSET VOLTAGE – mV

TPC 2. Input Offset Voltage Distribution

60

50

40

30

20

QUANTITY – Amplifiers

10

0

0101

VS = 3V
TA = 25ⴗC TO 85ⴗC

23456789

TPC 3. Input Offset Voltage Drift Distribution

0

0

TCVOS – ␮V/ⴗC

0.2 0.4 0.6 0.8

0.2 0.4 0.6 0.8

1.0

1.0

TPC 4. Input Offset Voltage Drift Distribution

1.5
VS = 3V

= 25ⴗC

T

0

03.00.5

A

1.0 1.5 2.0 2.5

COMMON-MODE VOLTAGE – V

1.0

0.5

ⴚ0.5

ⴚ1.0

INPUT OFFSET VOLTAGE – mV

ⴚ1.5

ⴚ2.0

TPC 5. Input Offset Voltage vs. Common-Mode Voltage

1.5
VS = 5V

= 25ⴗC

T

A

1.0

0.5

0

ⴚ0.5

ⴚ1.0

INPUT OFFSET VOLTAGE – mV

ⴚ1.5

ⴚ2.0

01

2345

COMMON-MODE VOLTAGE – V

TPC 6. Input Offset Voltage vs. Common-Mode Voltage

–5–REV. 0