Datasheet

AD7834/AD7835
Rev. D | Page 3 of 28
SPECIFICATIONS
V
CC
= 5 V ± 5%; V
DD
= 15 V ± 5%; V
SS
= −15 V ± 5%; AGND = DGND = 0 V; T
A
1
= T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter A B S Unit Test Conditions/Comments
ACCURACY
Resolution 14 14 14 Bits
Relative Accuracy ±2 ±1 ±2 LSB max
Differential Nonlinearity ±0.9 ±0.9 ±0.9 LSB max Guaranteed monotonic over temperature.
Full-Scale Error V
REF
(+) = +7 V, V
REF
(−) = −7 V.
T
MIN
to T
MAX
±5 ±5 ±8 mV max
Zero-Scale Error ±4 ±4 ±5 mV max V
REF
(+) = +7 V, V
REF
(−) = −7 V.
Gain Error ±0.5 ±0.5 ±0.5 mV typ V
REF
(+) = +7 V, V
REF
(−) = −7 V.
Gain Temperature
Coefficient
2
4 4 4 ppm FSR/°C typ
20 20 20 ppm FSR/°C max
DC Crosstalk
2
50 50 50 μV max See the Terminology section. R
L
= 10 kΩ.
REFERENCE INPUTS
DC Input Resistance 30 30 30 MΩ typ
Input Current ±1 ±1 ±1 μA max Per input.
V
REF
(+) Range 0/8.192 0/8.192 0/8.192 V min/max
V
REF
(−) Range −8.192/0 −8.192/0 −8.192/0 V min/max
V
REF
(+) − V
REF
(−) 5/14 7/14 5/14 V min/max
For specified performance. Can go as low as
0 V, but performance is not guaranteed.
DEVICE SENSE GROUND INPUTS
Input Current ±2 ±2 ±2 μA max Per input. V
DSG
= −2 V to +2 V.
DIGITAL INPUTS
V
INH
, Input High Voltage 2.4 2.4 2.4 V min
V
INL
, Input Low Voltage 0.8 0.8 0.8 V max
I
INH
, Input Current ±10 ±10 ±10 μA max
C
IN
, Input Capacitance 10 10 10 pF max
POWER REQUIREMENTS
V
CC
5.0 5.0 5.0 V nom ±5% for specified performance.
V
DD
15.0 15.0 15.0 V nom ±5% for specified performance.
V
SS
−15.0 −15.0 −15.0 V nom ±5% for specified performance.
Power Supply Sensitivity
ΔFull Scale/ΔV
DD
110 110 110 dB typ
ΔFull Scale/ΔV
SS
100 100 100 dB typ
I
CC
0.2 0.2 0.5 mA max V
INH
= V
CC
, V
INL
= DGND.
3 3 3 mA max AD7834: V
INH
= 2.4 V min, V
INL
= 0.8 V max.
6 6 6 mA max AD7835: V
INH
= 2.4 V min, V
INL
= 0.8 V max.
I
DD
13 13 15 mA max AD7834: outputs unloaded.
15 15 15 mA max AD7835: outputs unloaded.
I
SS
13 13 15 mA max Outputs unloaded.
1
Temperature range for A, B, and C versions is −40°C to +85°C.
2
Guaranteed by design.