Datasheet

REV. E–2–
AD7701–SPECIFICATIONS
Parameter A, S Version
2
B, T Version
2
Unit Test Conditions/Comments
STATIC PERFORMANCE
Resolution 16 16 Bits
Integral Nonlinearity
T
MIN
to T
MAX
±0.0007 % FSR typ
±0.003 ±0.0015 % FSR max
Differential Nonlinearity
T
MIN
to T
MAX
±0.125 ±0.125 LSB typ Guaranteed No Missing Codes
±0.5 ±0.5 LSB max
Positive Full-Scale Error
3
±0.13 ±0.13 LSB typ
±0.5 ±0.5 LSB max
Full-Scale Drift
4
±1.2 (±2.3 S Version) ±1.2 (±2.3 T Version) LSB typ
Unipolar Offset Error
3
±0.25 ±0.25 LSB typ
±1 ±1 LSB max
Unipolar Offset Drift
4
±1.6 (+3/–25 S Version) ±1.6 (+3/–25 T Version) LSB typ
Bipolar Zero Error
3
±0.25 ±0.25 LSB typ
±1 ± 1 LSB max
Bipolar Zero Drift
4
±0.8 (+1.5/–12.5 S Version) ±0.8 (+1.5/–12.5 T Version) LSB typ
Bipolar Negative Full-Scale Error
3
±0.5 ±0.5 LSB typ
±2 ±2 LSB max
Bipolar Negative Full-Scale Drift
4
±0.6 (±1.2 S Version) ±0.6 (±1.2 T Version) LSB typ
Noise (Referred to Output) 0.1 0.1 LSB rms typ
DYNAMIC PERFORMANCE
Sampling Frequency, f
S
f
CLKIN
/256 f
CLKIN
/256 Hz
Output Update Rate, f
OUT
f
CLKIN
/1024 f
CLKIN
/1024 Hz
Filter Corner Frequency, f
–3 dB
f
CLKIN
/409,600 f
CLKIN
/409,600 Hz
Settling Time to ±0.0007% FS 507904/f
CLKIN
507904/f
CLKIN
sec For Full-Scale Input Step
SYSTEM CALIBRATION Applies to unipolar and
Positive Full-Scale Overrange V
REF
+ 0.1 V
REF
+ 0.1 V max bipolar ranges. After cali-
Positive Full-Scale Overrange V
REF
+ 0.1 V
REF
+ 0.1 V max bration, if A
IN
> V
REF
, the
Negative Full-Scale Overrange –(V
REF
+ 0.1) –(V
REF
+ 0.1) V max device will output all 1s.
Maximum Offset Calibration Range
5, 6
If A
IN
< 0 (unipolar) or
Unipolar Input Range –(V
REF
+ 0.1) –(V
REF
+ 0.1) V max –V
REF
(bipolar), the device
Bipolar Input Range –0.4 V
REF
to +0.4 V
REF
–0.4 V
REF
to +0.4 V
REF
V max will output all 0s.
Input Span
7
0.8 V
REF
0.8 V
REF
V min
2 V
REF
+ 0.2 2 V
REF
+ 0.2 V max
ANALOG INPUT
Unipolar Input Range 0 to 2.5 0 to 2.5 V
Bipolar Input Range ±2.5 ±2.5 V
Input Capacitance 10 10 pF typ
Input Bias Current
1
11 nA typ
LOGIC INPUTS
All Inputs Except CLKIN
V
INL
, Input Low Voltage 0.8 0.8 V max
V
INH
, Input High Voltage 2.0 2.0 V min
CLKIN
V
INL
, Input Low Voltage 0.8 0.8 V max
V
INH
, Input High Voltage 3.5 3.5 V min
I
IN
, Input Current 10 10 µA max
LOGIC OUTPUTS
V
OL
, Output Low Voltage 0.4 0.4 V max I
SINK
= 1.6 mA
V
OH
, Output High Voltage DV
DD
– 1 DV
DD
– 1 V min I
SOURCE
= 100 µA
Floating State Leakage Current ±10 ±10 µA max
Floating State Output Capacitance 9 9 pF typ
(T
A
= 25C; AV
DD
= DV
DD
= +5 V; AV
SS
= DV
SS
= –5 V; V
REF
= +2.5 V; f
CLKIN
= 4.096 MHz;
Bipolar Mode: MODE = +5 V; A
IN
Source Resistance = 1k
1
with 1 nF to AGND at A
IN
; unless otherwise noted.)