AD7849
Rev. C | Page 4 of 20
Parameter A Version B Version C Version Unit Test Conditions/Comments
DIGITAL INPUTS
Input High Voltage, V
INH
2.4 2.4 2.4 V min
Input Low Voltage, V
INL
0.8 0.8 0.8 V max
Input Current, I
INH
±10 ±10 ±10 μA max
Input Capacitance, C
IN
10 10 10 pF max
DIGITAL OUTPUTS
Output Low Voltage, V
OL
0.4 0.4 0.4 V max I
SINK
= 1.6 mA
Output High Voltage, V
OH
4.0 4.0 4.0 V min I
SOURCE
= 400 μA
Floating State Leakage Current ±10 ±10 ±10 μA max
Floating State Output
Capacitance
10 10 10 pF max
POWER REQUIREMENTS
2
V
DD
14.25/15.75 14.25/15.75 14.25/15.75 V min/V max
V
SS
−14.25/−15.75 −14.25/−15.75 −14.25/−15.75 V min/V max
V
CC
4.75/5.25 4.75/5.25 4.75/5.25 V min/V max
I
DD
5 5 5 mA max
V
OUT
unloaded, V
INH
= V
DD
– 0.1 V,
V
INL
= 0.1 V
I
SS
5 5 5 mA max
V
OUT
unloaded, V
INH
= V
DD
– 0.1 V,
V
INL
= 0.1 V
I
CC
2.5 2.5 2.5 mA max V
INH
= V
DD
– 0.1 V, V
INL
= 0.1 V
Power Supply Sensitivity
3
0.4 1.5 1.5 LSB/V max
Power Dissipation 100 100 100 mW typ V
OUT
unloaded
1
Guaranteed by design and characterization, not production tested.
2
The AD7849 is functional with power supplies of ±12 V. See the Typical Performance Characteristics section.
3
Sensitivity of gain error, offset error, and bipolar zero error to V
DD
, V
SS
variations.
RESET SPECIFICATIONS
These specifications apply when the device goes into reset mode during power-up or power-down sequence. V
OUT
unloaded.
Table 2.
Parameter All Versions Unit Test Conditions/Comments
V
A
,
1
Low Threshold Voltage for V
DD
, V
SS
1.2 V max This is the lower V
DD
/V
SS
threshold voltage for the reset function.
0 V typ Above this, the reset is activated.
V
B
, High Threshold Voltage for V
DD
, V
SS
9.5 V max This is the higher V
DD
/V
SS
threshold voltage for the reset function.
6.4 V min Below this, the reset is activated. Typically, 8 V.
V
C
, Low Threshold Voltage for V
CC
1 V max This is the lower V
CC
threshold voltage for the reset function.
0 V typ Above this, the reset is activated.
V
D
, High Threshold Voltage for V
CC
4 V max This is the higher V
CC
threshold voltage for the reset function.
2.5 V min Below this, the reset is activated. Typically, 3 V.
G2 R
ON
1 kΩ typ On resistance of G2; V
DD
= 2 V; V
SS
= −2 V; I
G2
= 1 mA.
1
A pull-down resistor (65 kΩ) on V
OUT
maintains 0 V output when V
DD
/V
SS
is below V
A
.