Analog Devices AD834SCHIPS, AD834JR-REEL7, AD834JR-REEL, AD834JR, AD834JN Datasheet

REV.D

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a

AD834

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone]www.analog.com
Fax: [phone] © Analog Devices, Inc., 2002

500 MHz Four-Quadrant Multiplier

FEATURES
DC to >500 MHz Operation
Differential ⴞ1 V Full-Scale Inputs
Differential ⴞ4 mA Full-Scale Output Current
Low Distortion (

££

££

£

0.05% for 0 dBm Input)
Supply Voltages from ⴞ4 V to ⴞ9 V
Low Power (280 mW Typical at VS = ⴞ5 V)

APPLICATIONS
High-Speed Real Time Computation
Wideband Modulation and Gain Control
Signal Correlation and RF Power Measurement
Voltage Controlled Filters and Oscillators
Linear Keyers for High Resolution Television
Wideband True RMS

FUNCTIONAL BLOCK DIAGRAM

87 65

12 34

CURRENT

AMPLIFIER

(W)

ⴞ4mA

FS

8.5mA

8.5mA

AD834

V/I

V/I

X-DISTORTION

CANCELLATION

Y-DISTORTION

CANCELLATION

W1

+V

S

X1X2

W2–V

S

Y2Y1

MULTIPLIER CORE

GENERAL DESCRIPTION

The AD834 is a monolithic, laser-trimmed four-quadrant analog
multiplier intended for use in high-frequency applications, with
a transconductance bandwidth (R

L

= 50 W) in excess of 500 MHz

from either of the differential voltage inputs. In multiplier modes,
the typical total full-scale error is 0.5%, dependent on the appli­cation mode and the external circuitry. Performance is relatively
insensitive to temperature and supply variations, due to the use
of stable biasing based on a band gap reference generator and
other design features.

To preserve the full bandwidth potential of the high-speed
bipolar process used to fabricate the AD834, the outputs appear
as a differential pair of currents at open collectors. To provide a
single-ended ground referenced voltage output, some form of
external current to voltage conversion is needed. This may take
the form of a wideband transformer, balun, or active circuitry
such as an op amp. In some applications (such as power mea­surement) the subsequent signal processing may not need to
have high bandwidth.

The transfer function is accurately trimmed such that when
X = Y = ± 1 V, the differential output is ± 4 mA. This absolute
calibration allows the outputs of two or more AD834s to be
summed with precisely equal weighting, independent of the
accuracy of the load circuit.

The AD834J is specified for use over the commercial temperature
range of 0∞C to 70∞C and is available in an 8-lead DIP package
and an 8-lead plastic SOIC package. AD834A is available in
cerdip and 8-lead plastic SOIC packages for operation over the
industrial temperature range of –40∞C to +85∞C. The AD834S/
D883B is specified for operation over the military temperature
range of –55∞C to +125∞C and is available in the 8-lead cerdip
package. S-grade chips are also available.

Two application notes featuring the AD834 (AN-212 and
AN-216) can now be obtained by calling 1-800-ANALOG-D.
For additional applications circuits consult the AD811 data sheet.

PRODUCT HIGHLIGHTS

l. The AD834 combines high static accuracy (low input and

output offsets and accurate scale factor) with very high band­width. As a four-quadrant multiplier or squarer, the response
extends from dc to an upper frequency limited mainly by
packaging and external board layout considerations. A large
signal bandwidth of over 500 MHz is attainable under opti­mum conditions.

2. The AD834 can be used in many high-speed nonlinear
operations, such as square rooting, analog division, vector
addition, and rms-to-dc conversion. In these modes, the
bandwidth is limited by the external active components.

3. Special design techniques result in low distortion levels (better
than –60 dB on either input) at high frequencies and low signal
feedthrough (typically –65 dB up to 20 MHz).

4. The AD834 exhibits low differential phase error over the input
range—typically 0.08∞ at 5 MHz and 0.8∞ at 50 MHz. The
large signal transient response is free from overshoot and has
an intrinsic rise time of 500 ps, typically settling to within 1%
in under 5 ns.

5. The nonloading, high impedance, differential inputs simplify
the application of the AD834.

REV. D

–2–

AD834–SPECIFICATIONS

(TA = 25ⴗC and ⴞVS = ⴞ5 V, unless otherwise noted; dBm assumes 50 ⍀ load.)

AD834J AD834A/AD834S

Parameters Conditions Min Typ Max Min Typ Max Unit

MULTIPLIER PERFORMANCE

Transfer Function

W =

XY

(1V )

2

¥ 4 mA

W =

XY

(1V )

2

¥ 4 mA

Total Error

1

–1 V £ X, Y < +1 V ± 0.5 ⴞ2 ± 0.5 ⴞ2 % FS

vs. Temperature T

MIN

to T

MAX

± 1.5 ⴞ3 % FS

vs. Supplies

2

± 4 V to ± 6 V 0.1 0.3 0.1 0.3 % FS/V

Linearity

3

± 0.5 ⴞ1 ± 0.5 ⴞ1 % FS

Bandwidth

4

500 500 MHz

Feedthrough, X X = ± 1 V, Y = Nulled 0.2 0.3 0.2 0.3 % FS
Feedthrough, Y X = Nulled, Y = ± 1 V 0.1 0.2 0.1 0.2 % FS
AC Feedthrough, X

5

X = 0 dBm, Y = Nulled
f = 10 MHz –65 –65 dB
f = 100 MHz –50 –50 dB

AC Feedthrough, Y

5

X = Nulled, Y = 0 dBm
f = 10 MHz –70 –70 dB
f = 100 MHz –50 –50 dB

INPUTS (X1, X2, Y1, Y2)

Full-Scale Range Differential ± 1 ± 1V
Clipping Level Differential ⴞ1.1 ± 1.3 ⴞ1.1 ± 1.3 V
Input Resistance Differential 25 25 kW
Offset Voltage 0.5 3 0.5 3 mV

vs. Temperature T

MIN

to T

MAX

10 10 mV/∞C

44mV

vs. Supplies

2

± 4 V to ± 6 V 100 300 100 300 mV/V
Bias Current 45 45 mA
Common-Mode Rejection f £ 100 kHz; 1 V p-p 70 70 dB
Nonlinearity, X Y = 1 V; X = ± 1 V 0.2 0.5 0.2 0.5 % FS
Nonlinearity, Y X = 1 V; Y = ± 1 V 0.1 0.3 0.1 0.3 % FS
Distortion, X X = 0 dBm, Y = 1 V

f = 10 MHz –60 –60 dB

f = 100 MHz –44 –44 dB
Distortion, Y X = 1 V, Y = 0 dBm

f = 10 MHz –65 –65 dB

f = 100 MHz –50 –50 dB

OUTPUTS (W1, W2)

Zero Signal Current Each Output 8.5 8.5 mA
Differential Offset X = 0, Y = 0 ± 20 ⴞ60 ± 20 ⴞ60 mA

vs. Temperature T

MIN

to T

MAX

40 40 nA/∞C

ⴞ60 mA

Scaling Current Differential 3.96 4 4.04 3.96 4 4.04 mA
Output Compliance 4.75 9 4.75 9 V
Noise Spectral Density f = 10 Hz to 1 MHz 16 16 nV/÷Hz

Outputs into 50 W Load

POWER SUPPLIES

Operating Range ± 4 ± 9 ± 4 ± 9V
Quiescent Current

6

T

MIN

to T

MAX

+V

S

11 14 11 14 mA

–V

S

28 35 28 35 mA

REV. D

–3–

AD834

AD834J AD834A/AD834S

Parameters Conditions Min Typ Max Min Typ Max Unit

TEMPERATURE RANGE

Operating, Rated Performance

Commercial (0∞C to +70∞C) AD834J
Military (–55∞C to +125∞C) AD834S
Industrial (–40∞C to +85∞C) AD834A

PACKAGE OPTIONS

8-Lead SOIC (R) AD834JR, REEL, REEL7 AD834AR
8-Lead Cerdip (Q) AD834AQ, SQ/883B
8-Lead Plastic DIP (N) AD834JN

NOTES

1

Error is defined as the maximum deviation from the ideal output, and expressed as a percentage of the full-scale output. See Figure 6.

2

Both supplies taken simultaneously; sinusoidal input at f £ 10 kHz.

3

Linearity is defined as residual error after compensating for input offset voltage, output offset current, and scaling current errors.

4

Bandwidth is guaranteed when configured in squarer mode. See Figure 5.

5

Sine input; relative to full-scale output; zero input port nulled; represents feedthrough of the fundamental.

6

Negative supply current is equal to the sum of positive supply current, the signal currents into each output, W1 and W2, and the input bias currents.

Specifications in boldface are tested on all production units at final electrical test. Results from those tests are used to calculate outgoing quality levels.

Specifications subject to change without notice.

REV. D

AD834

–4–

ABSOLUTE MAXIMUM RATINGS

*

Supply Voltage (+VS to –VS) . . . . . . . . . . . . . . . . . . . . . . 18 V

Internal Power Dissipation . . . . . . . . . . . . . . . . . . . . 500 mW

Input Voltages (X1, X2, Y1, Y2) . . . . . . . . . . . . . . . . . . . +V

S

Operating Temperature Range

AD834J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0∞C to 70∞C

AD834A . . . . . . . . . . . . . . . . . . . . . . . . . . . –40∞C to +85∞C

AD834S/883B . . . . . . . . . . . . . . . . . . . . . –55∞C to +125∞C

Storage Temperature Range (Q) . . . . . . . . . –65∞C to +150∞C

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

Lead Temperature (Soldering 60 sec) . . . . . . . . . . . . . 300∞C

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

*

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

nent damage to the devices. 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.

THERMAL CHARACTERISTICS

␪

JC

␪

JA

8-Lead Cerdip Package (Q) 30∞C/W 110∞C/W
8-Lead Plastic SOIC (R) 45∞C/W 165∞C/W
8-Lead Plastic Mini-DIP (N) 50∞C/W 99∞C/W

ORDERING GUIDE

Temperature Package

Model Range Option

*

AD834JN 0∞C to 70∞C N-8
AD834JR 0∞C to 70∞C SO-8
AD834JR-REEL 0∞C to 70∞C SO-8
AD834JR-REEL7 0∞C to 70∞C SO-8
AD834AR –40∞C to +85∞C SO-8
AD834AQ –40∞C to +85∞C Q-8
AD834SQ/883B –55∞C to +125∞C Q-8
AD834SCHIPS –55∞C to +125∞C DIE

*N = Plastic DIP; Q = Cerdip; SO = Small Outline IC (SOIC) Package.

CONNECTION DIAGRAM

Small Outline (R) Package

Plastic DIP (N) Package

Cerdip (Q) Package

TOP VIEW

(Not to Scale)

8

7

6

5

1

2

3

4

Y1

Y2

–V

S

X2

X1

+V

S

W1W2

AD834

METALIZATION PHOTOGRAPH

CHIP DIMENSIONS AND BONDING DIAGRAM

Dimensions shown in inches and (mm).

Contact factory for latest dimensions.

ADI 1987USA

A834PMD

Y1

Y2

–V

S

W2 W1

+V

S

X1

X2

8

7

6

54

3

2

1

0.054 (1.37)

0.054 (1.37)