AD7538
Rev. B | Page 3 of 16
SPECIFICATIONS
V
DD
= 11.4 V to 15.75 V
1
, V
REF
= 10 V; V
PIN3
= V
PIN4
= 0 V, V
SS
= −300 mV; all specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter
2
A, J
Versions
B, K
Versions S Version T Version Unit Test Conditions/Comments
ACCURACY
Resolution 14 14 14 14 Bits
Relative Accuracy ±2 ±1 ±2 ±1 LSB max
All grades guaranteed
monotonic
Differential Nonlinearity ±1 ±1 ±1 ±1 LSB max Over temperature
Full-Scale Error Measured using internal R
FB
DAC
+25°C ±4 ±4 ±4 ±4 LSB max Registers loaded with all 1s
T
MIN
to T
MAX
±8 ±5 ±10 ±6 LSB max
Gain Temperature Coefficient
3
;
ΔGain/ΔTemperature
±2 ±2 ±2 ±2 ppm/°C typ
Output Leakage Current
I
OUT
(Pin 3)
25°C ±5 ±5 ±5 ±5 nA max All digital inputs 0 V
T
MIN
to T
MAX
±10 ±10 ±20 ±20 nA max V
SS
= –300 mV
T
MIN
to T
MAX
±25 ±25 ±150 ±150 nA max V
SS
= 0 V
REFERENCE INPUT
Input Resistance (Pin 1) 3.5 3.5 3.5 3.5 kΩ min Typical input resistance = 6 kΩ
10 10 10 10 kΩ max
DIGITAL INPUTS
V
IH
(Input High Voltage) 2.4 2.4 2.4 2.4 V min
V
IL
(Input Low Voltage) 0.8 0.8 0.8 0.8 V max
I
IN
(Input Current)
25°C ±1 ±1 ±1 ±1 μA max V
IN
= 0 V or V
DD
T
MIN
to T
MAX
±10 ±10 ±10 ±10 μA max
C
IN
(Input Capacitance)
3
7 7 7 7 pF max
POWER SUPPLY
V
DD
Range 11.4/15.75 11.4/15.75 11.4/15.75 11.4/15.75 V min/V max
Specification guaranteed over
this range
V
SS
Range −200/−500 −200/−500 −200/−500 −200/−500
mV min/
mV max
Specification guaranteed over
this range
I
DD
4 4 4 4 mA max All digital inputs are V
IL
or V
IH
500 500 500 500 μA max All digital inputs are 0 V or V
DD
1
Specifications are guaranteed for a V
DD
of 11.4 V to 15.75 V. At V
DD
= 5 V, the device is fully functional with degraded specifications.
2
Temperature range as follows: J, K Versions: 0°C to +70°C
A, B Versions: −25°C to +85°C
S, T Versions: −55°C to +125°C
3
Sample tested to ensure compliance.
