(VS = ؎15 V, TA = +25؇C unless otherwise noted)
AD538–SPECIFICATIONS
AD538AD
Typ
AD538BD
Typ
AD538SD
Typ
Parameters
Conditions
Min
Max
Min
Max
Min
Max
Units
MULTIPLIER DIVIDER
PERFORMANCE
Nominal Transfer
Function
m
m
m
⎛
⎞
⎛
⎞
⎛
⎞
VZ
VZ
VZ
10 V ≥ VX, VY, VZ ≥ 0 VO = VY
⎜
⎟
VO = Vy
⎜
⎟
VO = VY
⎜
⎟
V
V
V
⎝
⎠
⎝
⎠
⎝
⎠
X
X
X
m
m
m
⎛
⎞
⎛
⎞
IZ
⎛
⎞
IZ
IZ
400 μA ≥ IX, IY, IZ ≥ 0 VO = 25 kΩ × IY
VO = 25 kΩ × IY
VO = 25 kΩ × IY
⎜
⎟
⎜
⎟
⎜
⎟
I
I
I
⎝
⎠
⎝
⎠
X
⎝
⎠
X
X
Total Error Terms
100:1 Input Range1
100 mV ≤ VX ≤ 10 V
100 mV ≤ VY ≤ 10 V
100 mV ≤ VZ ≤ 10 V
VZ ≤ 10 VX, m = 1.0
TA = TMIN to TMAX
0.5
200
؎1
؎500
0.25
100
؎0.5
؎250
0.5
200
؎1
؎500
% of Reading +
μV
1
450
؎2
؎750
0.5
350
؎1
؎500
1.25
750
؎2.5
؎1000
% of Reading +
μV
Wide Dynamic Range2
10 mV ≤ VX ≤ 10 V
1 mV ≤ VY ≤ 10 V
0 mV ≤ VZ ≤ 10 V
VZ ≤ 10 VX, m = 1.0
TA = TMIN to TMAX
1
200
100
؎2
؎500
؎250
0.5
100
750
؎1
؎250
؎150
1
200
200
؎2
؎500
؎250
% of Reading +
μV +
μV × (VY + VZ)/VX
1
450
450
؎3
؎750
؎750
1
350
350
؎2
؎500
؎500
2
750
750
؎4
؎1000
؎1000
% of Reading +
μV +
μV × (VY + VZ)/VX
Exponent (m) Range
TA = TMIN to TMAX
0.2
5
0.2
5
0.2
5
OUTPUT
CHARACTERISTICS
Offset Voltage
V
Y = 0, VC = –600 mV
200
450
؎500
؎750
+11
100
350
–11
؎250
؎500
+11
200
750
–11
؎500
؎1000
+11
μV
μV
V
TA = TMIN to TMAX
RL = 2 kΩ
Output Voltage Swing
Output Current
–11
5
10
5
10
5
10
mA
FREQUENCY RESPONSE
Slew Rate
Small Signal Bandwidth
1.4
400
1.4
400
1.4
400
V/μs
kHz
100 mV ≤ 10 VY, VZ,
VX ≤ 10 V
VOLTAGE REFERENCE
Accuracy
Additional Error
Output Current
Power Supply Rejection
+2 V = VREF
V
REF = 10 V or 2 V
25
20
2.5
؎50
؎30
15
20
2.5
؎25
؎30
25
30
2.5
؎50
؎50
mV
mV
mA
TA = TMIN or TMAX
VREF = 10 V to 2 V
1
1
1
4.5 V ≤ VS
13 V ≤ VS
≤
18 V
300
200
600
500
300
200
600
500
300
200
600
500
μV/V
μV/V
+10 V = VREF
≤ 18 V
POWER SUPPLY
Rated
RL = 2 kΩ
15
15
15
V
V
%/V
Operating Range3
PSRR
؎4.5
؎18
0.1
؎4.5
؎18
0.1
؎4.5
؎18
0.1
4.5 V < VS
<
18 V
0.5
0.05
0.5
V
X = VY = VZ = 1 V
VOUT = 1 V
Quiescent Current
4.5
7
4.5
7
4.5
7
mA
TEMPERATURE RANGE
Rated
Storage
–25
–65
+85
+150
–25
–65
+85
+150
–55
–65
+125
+150
°C
°C
PACKAGE OPTIONS
Ceramic (D-18)
AD538AD
AD538BD
AD538SD
AD538SD/883B
Chips
AD538ACHIPS
NOTES
1Over the 100 mV to 10 V operating range total error is the sum of a percent of reading term and an output offset. With this input dynamic range the input offset
contribution to total error is negligible compared to the percent of reading error. Thus, it is specified indirectly as a part of the percent of reading error.
2The most accurate representation of total error with low level inputs is the summation of a percent of reading term, an output offset and an input offset multiplied by
the incremental gain (VY + VZ) VX.
3When using supplies below 13 V, the 10 V reference pin must be connected to the 2 V pin in order for the AD538 to operate correctly.
Specifications subject to change without notice.
Specifications shown 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.
REV. C
REV. D
–2–
ROCHESTER [ Rochester Electronics ]
