AD534_15 Datasheet, PDF (1/21 Pages) Analog Devices – Internally Trimmed Precision IC Multiplier

Data Sheet
FEATURES
Pretrimmed to ±0.25% maximum 4-quadrant error (AD534L)
All inputs (X, Y, and Z) differential, high impedance for
[(X1 − X2)(Y1 − Y2)/10 V] + Z2 transfer function
Scale factor adjustable to provide up to ×100 gain
Low noise design: 90 μV rms, 10 Hz to10 kHz
Low cost, monolithic construction
Excellent long-term stability
APPLICATIONS
High quality analog signal processing
Differential ratio and percentage computations
Algebraic and trigonometric function synthesis
Wideband, high crest rms-to-dc conversion
Accurate voltage controlled oscillators and filters
Available in chip form
GENERAL DESCRIPTION
The AD534 is a monolithic laser trimmed four-quadrant multi-
plier divider having accuracy specifications previously found
only in expensive hybrid or modular products. A maximum
multiplication error of ±0.25% is guaranteed for the AD534L
without any external trimming. Excellent supply rejection, low
temperature coefficients and long-term stability of the on-chip
thin film resistors and buried Zener reference preserve accuracy
even under adverse conditions of use. It is the first multiplier to
offer fully differential, high impedance operation on all inputs,
including the Z input, a feature that greatly increases its flexibility
and ease of use. The scale factor is pretrimmed to the standard
value of 10.00 V; by means of an external resistor, this can be
reduced to values as low as 3 V.
Internally Trimmed
Precision IC Multiplier
AD534
FUNCTIONAL BLOCK DIAGRAM
STABLE
SF
REFERENCE
+V_S
AND BIAS
–V_S
TRANSFER FUNCTION
X₁
X₂
V-TO-1
TRANSLINEAR
V_OUT = A
(X₁ – X₂) (Y₁ – Y₂)
SF
– (Z₁ – Z₂)
MULTIPLIER
Y₁
V-TO-1
ELEMENT
Y₂
A
OUT
Z₁
V-TO-1
Z₂
0.75 ATTEN
HIGH GAIN
OUTPUT
AMPLIFIER
Figure 1.
The wide spectrum of applications and the availability of several
grades commend this multiplier as the first choice for all new
designs. The AD534J (±1% maximum error), AD534K (±0.5%
maximum), and AD534L (±0.25% maximum) are specified for
operation over the 0°C to +70°C temperature range. The AD534S
(±1% maximum) and AD534T (±0.5% maximum) are specified
over the extended temperature range, −55°C to +125°C. All
grades are available in hermetically sealed TO-100 metal cans
and SBDIP packages. AD534K, AD534S, and AD534T chips are
also available.
Rev. D
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