Analog Devices AD842 Datasheet

Wideband, High Output Current,

a

FEATURES
AC PERFORMANCE
Gain Bandwidth Product: 80 MHz (Gain = 2)
Fast Settling: 100 ns to 0.01% for a 10 V Step
Slew Rate: 375 V/␮s
Stable at Gains of 2 or Greater
Full Power Bandwidth: 6.0 MHz for 20 V p-p

DC PERFORMANCE
Input Offset Voltage: 1 mV max
Input Offset Drift: 14 ␮V/ⴗC
Input Voltage Noise: 9 nV/√Hz typ
Open-Loop Gain: 90 V/mV into a 500 ⍀ Load
Output Current: 100 mA min
Quiescent Supply Current: 14 mA max

APPLICATIONS
Line Drivers
DAC and ADC Buffers
Video and Pulse Amplifiers
Available in Plastic DIP, Hermetic Metal Can,

Hermetic Cerdip, SOIC and LCC Packages and in

Chip Form
MIL-STD-883B Parts Available
Available in Tape and Reel in Accordance with

EIA-481A Standard

PRODUCT DESCRIPTION

The AD842 is a member of the Analog Devices family of wide
bandwidth operational amplifiers. This device is fabricated using
Analog Devices’ junction isolated complementary bipolar (CB)
process. This process permits a combination of dc precision and
wideband ac performance previously unobtainable in a mono­lithic op amp. In addition to its 80 MHz gain bandwidth, the
AD842 offers extremely fast settling characteristics, typically
settling to within 0.01% of final value in less than 100 ns for a
10 volt step.

The AD842 also offers a low quiescent current of 13 mA, a high
output current drive capability (100 mA minimum), a low input
voltage noise of 9 nV√Hz and a low input offset voltage (1 mV
maximum).

The 375 V/µs slew rate of the AD842, along with its 80 MHz
gain bandwidth, ensures excellent performance in video and
pulse amplifier applications. This amplifier is ideally suited for
use in high frequency signal conditioning circuits and wide
bandwidth active filters. The extremely rapid settling time of
the AD842 makes this amplifier the preferred choice for data
acquisition applications which require 12-bit accuracy. The

*Covered by U.S. Patent Nos. 4,969,823 and 5,141,898.

REV. E

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.

Fast Settling Op Amp

AD842*

CONNECTION DIAGRAMS

Plastic DIP (N) Package

and

Cerdip (Q) Package

NC

NC

BALANCE

–INPUT

+INPUT

NC

1

AD842

2

3

4

+

5

6

V–

7

TOP VIEW

NC = NO CONNECT

14

NC

13

BALANCE

12

NC

11

V+

10

OUTPUT

9

NC

8

NC

TO-8 (H) Package

NC

BALANCE

BALANCE

NC

V+

AD842

–INPUT

+INPUT

NC

NOTE: CAN BE TIED TO V+
NC = NO CONNECT

+

NC

TOP VIEW

OUTPUT

V–

NC

AD842 is also appropriate for other applications such as high
speed DAC and ADC buffer amplifiers and other wide band­width circuitry.

APPLICATION HIGHLIGHTS

1. The high slew rate and fast settling time of the AD842 make
it ideal for DAC and ADC buffers amplifiers, lines drivers
and all types of video instrumentation circuitry.

2. The AD842 is a precision amplifier. It offers accuracy to

0.01% or better and wide bandwidth; performance previously
available only in hybrids.

3. Laser-wafer trimming reduces the input offset voltage of
1 mV max, thus eliminating the need for external offset
nulling in many applications.

4. Full differential inputs provide outstanding performance in
all standard high frequency op amp applications where the
circuit gain will be 2 or greater.

5. The AD842 is an enhanced replacement for the HA2542.

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

LCC (E) Package

BALANCE

NC

BALANCE

NC

3212019

NC

4

–IN

5

NC

6

+IN

NC

+

7

AD842

8

9

101112

S

NC

NCNCNC

–V

NC = NO CONNECT

SOIC (R-16) Package

1

NC

–INPUT

+INPUT

–V

NC

NC

S

NC

2

AD842

3

4

5

+

6

7

8

TOP VIEW

NC = NO CONNECT

BALANCE

NC

13

NC

18

17

+V

16

NC
OUTPUT

15

14

NC

16

NC

15

BALANCE

14

+V

13

NC

12

OUTPUT

11

NC

10

NC

9

NC

S

S

AD842–SPECIFICATIONS

Model AD842J/JR

(@ +25ⴗC and ⴞ15 V dc, unless otherwise noted)

1

AD842K AD842S

2

Conditions Min Typ Max Min Typ Max Min Typ Max Units

INPUT OFFSET VOLTAGE

3

T

MIN–TMAX

0.5 1.5 0.3 1.0 0.5 1.5 mV

2.5/3 1.5 3.5 mV

Offset Drift 14 14 14 µV/°C

INPUT BIAS CURRENT 4.2 8 3.5 5 4.2 8 µA

T

MIN–TMAX

10 612µA

Input Offset Current 0.1 0.4 0.05 0.2 0.1 0.4 µA

T

MIN–TMAX

0.5 0.3 0.6 µA

INPUT CHARACTERISTICS Differential Mode

Input Resistance 100 100 100 kΩ
Input Capacitance 2.0 2.0 2.0 pF

INPUT VOLTAGE RANGE

Common Mode ⴞ10 ⴞ10 ⴞ10 V
Common-Mode Rejection V

= ±10 V 86 115 90 115 86 115 dB

CM

T

MIN–TMAX

80 86 80 dB

INPUT VOLTAGE NOISE f = 1 kHz 9 9 9 nV/√Hz

Wideband Noise 10 Hz to 10 MHz 28 28 28 µV rms

OPEN-LOOP GAIN V

= ±10 V

O

R

≥ 500 Ω 40/30 90 50 90 40 90 V/mV

LOAD

T

MIN–TMAX

20/15 25 20 V/mV

OUTPUT CHARACTERISTICS

Voltage R
Current V

≥ 500 Ω ⴞ10 ⴞ10 ⴞ10 V

LOAD

= ±10 V 100 100 100 mA

OUT

Open Loop 5 5 5 Ω

FREQUENCY RESPONSE

Gain Bandwidth Product V
Full Power Bandwidth

Rise Time
Overshoot
Slew Rate

5

5

5

Settling Time

4

5

= 90 mV 80 80 80 MHz

OUT

VO = 20 V p-p
R

≥ 500 Ω 4.7 6 4.7 6 4.7 6 MHz

LOAD

A

= –2 10 10 10 ns

VCL

A

= –2 20 20 20 %

VCL

A

= –2 300 375 300 375 300 375 V/µs

VCL

10 V Step
to 0.1% 80 80 80 ns

to 0.01% 100 100 100 ns
Differential Gain f = 4.4 MHz 0.015 0.015 0.015 %
Differential Phase f = 4.4 MHz 0.035 0.035 0.035 Degree

POWER SUPPLY

Rated Performance ±15 ± 15 ±15 V
Operating Range ⴞ5 ⴞ18 ⴞ5 ⴞ18 ⴞ5 ⴞ18 V
Quiescent Current 13/14 14/16 13 14 13 14 mA

Power Supply Rejection Ratio V

TEMPERATURE RANGE

Rated Performance

6

T

MIN–TMAX

= ±5 V to ±18 V 86 100 90 105 86 100 dB

S

T

MIN–TMAX

80 86 80 dB

0 +75 0 +75 –55 +125 °C

16/19.5 16 19 mA

PACKAGE OPTIONS

Plastic (N-14) AD842JN AD842KN
Cerdip (Q-14) AD842JQ AD842KQ AD842SQ, AD842SQ/883B
SOIC (R-16) AD842JR-16
Tape and Reel AD842JR-16-REEL

AD842JR-16-REEL7
TO-8 (H-12A) AD842JH AD842KH AD842SH
LCC (E-20A) AD842SE/883B
Chips AD842JCHIPS AD842SCHIPS

NOTES

1

AD842JR specifications differ from those of the AD842JN, JQ and JH due to the thermal characteristics of the SOIC package.

2

Standard Military Drawing available 5962-8964201xx

2A – (SE/883B); XA – (SH/883B); CA – (SQ/883B).

3

Input offset voltage specifications are guaranteed after 5 minutes at TA = +25°C.

4

Full power bandwidth = slew rate/2 π V

5

Refer to Figures 22 and 23.

6

“S” grade T

All min and max specifications are guaranteed. Specifications shown in boldface are tested on all production units.
Specifications subject to change without notice.

specifications are tested with automatic test equipment at TA = –55°C and TA = +125°C.

MIN–TMAX

PEAK

.

–2–

REV. E

AD842

ABSOLUTE MAXIMUM RATINGS

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±18 V

Internal Power Dissipation

2

1

Plastic (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 W

Cerdip (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 W

TO-8 (H) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 W

SOIC (R) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 W

LCC (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 W

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± V

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

Storage Temperature Range

Q, H, E . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +150°C

N, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +175°C

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

METALIZATION PHOTOGRAPH

Contact factory for latest dimensions.

Dimensions shown in inches and (mm).

NOTES

1

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 indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

2

Maximum internal power dissipation is specified so that TJ does not exceed

+150°C at an ambient temperature of +25°C.

Thermal Characteristics:

S

Plastic Package 30°C/W 100°C/W
Cerdip Package 30°C/W 110°C/W 38°C/W
TO-8 Package 30°C/W 100°C/W 27°C/W
16-Lead SOIC Package 30°C/W 100°C/W
20-Lead LCC Package 35°C/W 150°C/W

Recommended Heat Sink: Aavid Engineering© #602B

θ

JC

θ

JA

θ

SA

–3–REV. E