Analog Devices AD843JR-16, AD843JN, AD843JCHIPS, AD843BQ, AD843BH Datasheet

34 MHz, CBFET

a

FEATURES
AC PERFORMANCE
Unity Gain Bandwidth: 34 MHz
Fast Settling: 135 ns to 0.01%
Slew Rate: 250 V/ms
Stable at Gains of 1 or Greater
Full Power Bandwidth: 3.9 MHz

DC PERFORMANCE
Input Offset Voltage: 1 mV max (AD843K/B}
Input Bias Current: 0.6 nA typ
Input Voltage Noise: 19 nV/√
Open Loop Gain: 30 V/mV into a 500 V Load
Output Current: 50 mA min
Supply Current: 13 mA max
Available in 8-Pin Plastic Mini-DIP & Cerdip, 16-Pin SOIC,

20-Pin LCC and 12-Pin Hermetic Metal Can Packages

Available in Tape and Reel in Accordance with

EIA-481A Standard

Chips and MIL-STD-883B Parts Also Available
APPLICATIONS

High Speed Sample-and-Hold Amplifiers
High Bandwidth Active Filters
High Speed Integrators
High Frequency Signal Conditioning

Hz

Fast Settling Op Amp

AD843

CONNECTION DIAGRAMS

16-Pin SOIC (R-16) Package Plastic (N-8) and

Cerdip (Q-8) Package

TO-8 (H-12A) Package LCC (E-20A) Package

PRODUCT DESCRIPTION

The AD843 is a fast settling, 34 MHz, CBFET input op amp.
The AD843 combines the low (0.6 nA) input bias currents
characteristic of a FET input amplifier while still providing a
34 MHz bandwidth and a 135 ns settling time (to within 0.01%
of final value for a 10 volt step). The AD843 is a member of the
Analog Devices’ family of wide bandwidth operational amplifi­ers. These devices are 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.

The 250 V/µs slew rate and 0.6 nA input bias current of the
AD843 ensure excellent performance in high speed sample-and­hold applications and in high speed integrators. This amplifier is
also ideally suited for high bandwidth active filters and high fre­quency signal conditioning circuits.

Unlike many high frequency amplifiers, the AD843 requires no
external compensation and it remains stable over its full operat­ing temperature range. It is available in five performance grades:
the AD843J and AD843K are rated over the commercial
temperature range of 0°C to +70°C. The AD843A and AD843B
are rated over the industrial temperature range of –40°C to +85°C.
The AD843S is rated over the military temperature range of –55°C
to +125°C and is available processed to MIL-STD-883B, Rev. C.

REV. D

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.

The AD843 is offered in either 8-pin plastic DIP or hermetic
cerdip packages, in 16-pin SOIC, 20-Pin LCC, or in a 12-pin
metal can. Chips are also available.

PRODUCT HIGHLIGHTS

1. The high slew rate, fast settling time and low input bias cur­rent of the AD843 make it the ideal amplifier for 12-bit D/A
and A/D buffers, for high speed sample-and-hold amplifiers
and for high speed integrator circuits. The AD843 can re­place many FET input hybrid amplifiers such as the
LH0032, LH4104 and OPA600.

2. Fully differential inputs provide outstanding performance in
all standard high frequency op amp applications such as sig­nal conditioning and active filters.

3. Laser wafer trimming reduces the input offset voltage to
1 mV max (AD843K and AD843B).

4. Although external offset nulling is unnecessary in many ap­plications, offset null pins are provided.

5. The AD843 does not require external compensation at
closed loop gains of 1 or greater.

© Analog Devices, Inc., 1995

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: [phone] Fax: [phone]

AD843–SPECIFICATIONS

(@ TA = +25°C and ±15 V dc, unless otherwise noted)

AD843J/A AD843K/B AD843S

1

Model Conditions Min Typ Max Min Typ Max Min Typ Max Units

INPUT OFFSET VOLTAGE

Offset Drift 12 12 35 12 µV/°C

INPUT BIAS CURRENT Initial (TJ = +25°C) 50 40 50 pA

INPUT OFFSET CURRENT Initial (TJ = +25°C) 30 20 30 pA

INPUT CHARACTERISTICS

Input Resistance 10

1

T

MIN-TMAX

Warmed-Up
T

MIN-TMAX

Warmed-Up
T

MIN-TMAX

2

2

1.0 2.0 0.5 1.0 1.0 2.0 mV

1.7 4.0 1.2 2.0 3.0 4.5 mV

0.8 2.5 0.6 1.0 0.8 2.5 nA

60/160 23/65 2600 nA

0.25 1.0 0.2 0.4 0.25 1.0 nA

23/64 9/26 1025 nA

10

10

10

10

10

Ω

Input Capacitance 6 6 6 pF

INPUT VOLTAGE RANGE

Common Mode 610 +12, 610 +12, 610 +12, V

–13 –13 –13

COMMON-MODE REJECTION VCM = ±10 V 60 72 70 76 60 72 dB

T

MIN-TMAX

60 72 68 76 60 72 dB

INPUT VOLTAGE NOISE f = 10 kHz 19 19 19 nV/√Hz

Wideband Noise 10 Hz to 10 MHz 60 60 60 µV rms

OPEN LOOP GAIN VO = ±10 V

R

≥ 500 Ω 15 25 20 30 15 30 V/mV

LOAD

T

MIN-TMAX

10 20 10 25 10 25 V/mV

OUTPUT CHARACTERISTICS

Voltage R

Current V
Output Resistance Open Loop 12 12 12 Ω

≥ 500 Ω 610 +11.5, 610 +11.5, 610 +11.5, V

LOAD

= ±10 V 50 50 50 mA

OUT

–12.6 –12.6 –12.6

FREQUENCY RESPONSE

Unity Gain Bandwidth V
Full Power Bandwidth

3

= 90 mV p-p 34 34 34 MHz

OUT

VO = 20 V p-p
R1 ≥ 500 Ω 2.5 3.9 2.5 3.9 2.5 3.9 MHz

Rise Time A
Overshoot A
Slew Rate A
Settling Time 10 V Step

= –1 10 10 10 ns

VCL

= –1 15 15 15 %

VCL

= –1 160 250 160 250 160 250 V/µs

VCL

A

= –1

VCL

to 0.1% 95 95 95 ns
to 0.01% 135 135 135 ns

Overdrive Recovery –Overdrive 200 200 200 ns

+Overdrive 700 700 700 ns
Differential Gain f = 4.4 MHz 0.025 0.025 0.025 %
Differential Phase f = 4.4 MHz 0.025 0.025 0.025 Degree

POWER SUPPLY

Rated Performance ± 15 ±15 ±15 V
Operating Range 64.5 618 64.5 618 64.5 618 V
Quiescent Current 12 13 12 13 12 13 mA

T
Rejection Ratio ±5 V to ±18 V 65 76 70 80 65 76 dB
Rejection Ratio T

MIN-TMAX

MIN-TMAX

12.3 14 12.3 14 12.5 16 mA

62 76 68 80 62 76 dB

TEMPERATURE RANGE

Operating, Rated Performance

Commercial (0°C to +70°C) AD843J AD843K
Industrial (–40°C to +85°C) AD843A AD843B
Military (–55°C to +125°C)

4

AD843S

PACKAGE OPTIONS

Plastic (N-8) AD843JN AD843KN
Cerdip (Q-8) AD843AQ AD843BQ AD843SQ, AD843SQ/883B
Metal Can (H-12A) AD843BH AD843SH, AD843SH/883B
LCC (E-20A) AD843SE/883B
SOIC (R-16) AD843JR–16
Tape & Reel AD843JR-16–REEL

AD843JR-16–REEL7

Chips AD843JCHIPS AD843SCHIPS

–2–

REV. D

AD843

NOTES

1

Standard Military Drawings Available: 5962-9098001M2A (SE/883B), 5962-9098001MXA (SH/883B), 5962-9098001MPA (SQ/883B).

2

Specifications are guaranteed after 5 minutes at TA = +25°C.

3

Full power bandwidth = Slew Rate/2 πV peak.

4

All “S” grade T

Specifications subject to change without notice.
Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels. All min and

max specifications are guaranteed although only those shown in boldface are tested on all production units.

MIN-TMAX

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

ABSOLUTE MAXIMUM RATINGS

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

Internal Power Dissipation

2

1

Plastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 Watts

Cerdip Package . . . . . . . . . . . . . . . . . . . . . . . . . 1.35 Watts

12-Pin Header Package . . . . . . . . . . . . . . . . . . . 1.80 Watts

16-Pin SOIC Package . . . . . . . . . . . . . . . . . . . . 1.50 Watts

20-Pin LCC Package . . . . . . . . . . . . . . . . . . . . . . 1.00 Watt

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

S

Output Short Circuit Duration . . . . . . . . . . . . . . . . Indefinite

Differential Input Voltage . . . . . . . . . . . . . . . . . . +V

and –V

S

S

Storage Temperature Range (N, R) . . . . . . . –65°C to +125°C

Storage Temperature Range (Q, H, E) . . . . –65°C to +150°C

Operating Temperature Range

AD843J/R . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C

AD843A/B . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

AD843S . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C

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

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 V

NOTES

1

Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to 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.

2

8-Pin Plastic Package: θJA = 100°C/Watt
8-Pin Cerdip Package: θJA = 110°C/Watt
12-Pin Header Package: θJA = 80°C/Watt
16-Pin SOIC Package: θJA = 100°C/Watt
20-Pin LCC Package: θJA = 150°C/Watt

METALIZATION PHOTOGRAPH

Contact factory for latest dimensions.

Dimensions shown in inches and (mm).

REV. D

–3–

AD843–Typical Characteristics

Figure 1. Input Voltage Range vs.
Supply Voltage

Figure 4. Quiescent Current vs.
Supply Voltage

Figure 2. Output Voltage Swing vs.
Supply Voltage

Figure 5. Input Bias Current vs.
Junction Temperature

Figure 3. Output Voltage Swing vs.
Load Resistance

Figure 6. Output Impedance vs.
Frequency

Figure 7. Input Bias Current vs.
Common Mode Voltage

Figure 8. Short Circuit Current
Limit vs. Junction Temperature (T

–4–

Figure 9. Gain Bandwidth Product

)

J

vs. Temperature

REV. D