Datasheet

AD7849
Rev. C | Page 3 of 20
SPECIFICATIONS
V
DD
= 14.25 V to 15.75 V; V
SS
= −14.25 V to −15.75 V; V
CC
= 4.75 V to 5.25 V; V
OUT
loaded with 2 kΩ, 200 pF to 0 V; V
REF+
= 5 V; R
OFS
connected to 0 V; T
A
= T
MIN
to T
MAX
, unless otherwise noted. Temperature range for A, B, C versions is −40°C to +85°C.
Table 1.
Parameter A Version B Version C Version Unit Test Conditions/Comments
RESOLUTION 14 16 16 Bits
A version: 1 LSB = 2 (V
REF+
− V
REF−
)/2
14
;
B, C versions: 1 LSB = 2 (V
REF+
− V
REF−
)/2
16
UNIPOLAR OUTPUT V
REF−
= 0 V, V
OUT
= 0 V to 10 V
Relative Accuracy at 25°C ±4 ±6 ±4 LSB typ
T
MIN
to T
MAX
±5 ±16 ±8 LSB max
Differential Nonlinearity ±0.25 ±0.9 ±0.5 LSB max
All grades guaranteed monotonic
over temperature
Gain Error at 25°C ±1 ±4 ±4 LSB typ V
OUT
load = 10 MΩ
T
MIN
to T
MAX
±4 ±16 ±16 LSB max
Offset Error at 25°C ±1 ±4 ±4 LSB typ
T
MIN
to T
MAX
±6 ±24 ±16 LSB max
Gain Temperature Coefficient
1
±2 ±2 ±2
ppm FSR/
°C typ
Offset Temperature Coefficient
1
±2 ±2 ±2
ppm FSR/
°C typ
BIPOLAR OUTPUT V
REF−
= 5 V, V
OUT
= −10 V to +10 V
Relative Accuracy at 25°C ±2 ±3 ±2 LSB typ
T
MIN
to T
MAX
±3 ±8 ±4 LSB max
Differential Nonlinearity ±0.25 ±0.9 ±0.5 LSB max
All grades guaranteed monotonic
over temperature
Gain Error at 25°C ±1 ±4 ±4 LSB typ V
OUT
load = 10 MΩ
T
MIN
to T
MAX
±4 ±16 ±16 LSB max
Offset Error at 25°C ±0.5 ±2 ±2 LSB typ
T
MIN
to T
MAX
±3 ±12 ±8 LSB max
Bipolar Zero Error at 25°C ±0.5 ±2 ±2 LSB typ
T
MIN
to T
MAX
±4 ±12 ±8 LSB max
Gain Temperature Coefficient
1
±2 ±2 ±2
ppm FSR/
°C typ
Offset Temperature Coefficient
1
±2 ±2 ±2
ppm FSR/
°C typ
Bipolar Zero Temperature
Coefficient1
±2 ±2 ±2
ppm FSR/
°C typ
REFERENCE INPUT
Input Resistance 25 25 25 kΩ min Resistance from V
REF+
to V
REF−
43 43 43 kΩ max Typically 34 kΩ
V
REF+
Range
V
SS
+ 6 to
V
DD
− 6
V
SS
+ 6 to
V
DD
− 6
V
SS
+ 6 to
V
DD
− 6
V
V
REF−
Range
V
SS
+ 6 to
V
DD
− 6
V
SS
+ 6 to
V
DD
− 6
V
SS
+ 6 to
V
DD
− 6
V
OUTPUT CHARACTERISTICS
Output Voltage Swing
V
SS
+ 4 to
V
DD
− 4
V
SS
+ 4 to
V
DD
− 4
V
SS
+ 4 to
V
DD
− 4
V max
Resistive Load 2 2 2 kΩ min To 0 V
Capacitive Load 200 200 200 pF max To 0 V
Output Resistance 0.3 0.3 0.3 Ω typ
Short-Circuit Current ±25 ±25 ±25 mA typ Voltage range: −10 V to +10 V