AD538
Rev. E | Page 3 of 16
SPECIFICATIONS
V
S
= ±15 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter
Test Conditions/
Comments
AD538AD AD538BD AD538SD
Unit Min Typ Max Min Typ Max Min Typ Max
MULTIPLIER DIVIDER
PERFORMANCE
Nominal Transfer
Function
10 V ≥ V
X
, V
Y
, V
Z
≥ 0
V
O
= V
Y
(V
Z
/V
X
)
m
V
O
= V
Y
(V
Z
/V
X
)
m
V
O
= V
Y
(V
Z
/V
X
)
m
400 µA ≥ I
X
, I
Y
, I
Z
≥ 0
V
O
= 25 kΩ × I
Y
(I
Z
/I
X
)
m
V
O
= 25 kΩ × I
Y
(I
Z
/I
X
)
m
V
O
= 25 kΩ × I
Y
(I
Z
/I
X
)
m
Total Error Terms 100 mV ≤ V
X
≤ 10 V ±0.5 ±1 ±0.25 ±0.5 ±0.5 ±1 % of Reading +
100:1 Input
Range
1
100 mV ≤ V
Y
≤ 10 V
±200 ±500 ±100 ±250 ±200 ±500 µV
100 mV ≤ V
Z
≤ 10 V
V
Z
≤ 10 V
X
, m = 1.0
T
A
= T
MIN
to T
MAX
±1 ±2 ±0.5 ±1 ±1.25 ±2.5 % of Reading +
±450 ±750 ±350 ±500 ±750 ±1000 µV
Wide Dynamic
Range
2
100 mV ≤ V
X
≤ 10 V
±1 ±2 ±0.5 ±1 ±1 ±2 % of Reading +
100 mV ≤ V
Y
≤ 10 V ±200 ±500 ±100 ±250 ±200 ±500 µV
100 mV ≤ V
Z
≤ 10 V ±100 ±250 ±750 ±150 ±200 ±250 µV × (V
Y
+ V
Z
)/V
X
V
Z
≤ 10 V
X
, m = 1.0
T
A
= T
MIN
to T
MAX
±1 ±3 ±1 ±2 ±2 ±4 % of Reading +
±450 ±750 ±350 ±500 ±750 ±1000 µV +
±450 ±750 ±350 ±500 ±750 ±1000
µV × (V
Y
+
V
Z
)/V
X
Exponent (m)
Range
T
A
= T
MIN
to T
MAX
0.2 5 0.2 5 0.2 5
OUTPUT
CHARACTERISTICS
Offset Voltage
V
Y
= 0, V
C
=
−600 mV
±200 ±500 ±100 ±250 ±200 ±500 µV
T
A
= T
MIN
to T
MAX
±450 ±750 ±350 ±500 ±750 ±1000 µV
Output Voltage
Swing
R
L
= 2 kΩ −11 +11 −11 +11 −11 +11 V
Output Current 5 10 5 10 5 10 mA
FREQUENCY
RESPONSE
Slew Rate 1.4 1.4 1.4 V/µs
Small Signal
Bandwidth
100 mV ≤ 10 V
Y
, V
Z
,
V
X
≤ 10 V
400 400 400 kHz
VOLTAGE REFERENCE
Accuracy V
REF
= 10 V or 2 V ±25 ±50 ±15 ±25 ±25 ±50 mV
Additional Error T
A
= T
MIN
or T
MAX
±20 ±30 ±20 ±30 ±30 ±50 mV
Output Current V
REF
= 10 V to 2 V 1 2.5 1 2.5 1 2.5 mA
Power Supply
Rejection
+2 V = V
REF
±4.5 V ≤ V
S
≤ ±18 V 300 600 300 600 300 600 µV/V
+10 V = V
REF
±13 V ≤ V
S
≤ ±18 V 200 500 200 500 200 500 µV/V
POWER SUPPLY
Rated R
L
= 2 kΩ ±15 ±15 ±15 V
Operating Range
3
±4.5 ±18 ±4.5 ±18 ±4.5 ±18 V
PSRR ±4.5 V<, V
S
< ±18 V 0.5 0.1 0.5 0.1 0.5 0.1 %/V
V
X
= V
Y
= V
Z
= 1 V
V
O
= 1 V
Quiescent Current 4.5 7 4.5 7 4.5 7 mA
