Datasheet

REV. E–2–
AD7703–SPECIFICATIONS
Parameter A/S Version
2
B Version
2
C Version
2
Unit Test Conditions/Comments
STATIC PERFORMANCE
Resolution 20 20 20 Bits
Integral Nonlinearity, T
MIN
to T
MAX
±0.0015 ±0.0007 ±0.0003 % FSR typ
25°C ±0.003 ±0.0015 ±0.0008 % FSR max
T
MIN
to T
MAX
±0.003 ±0.0015 ±0.0012 % FSR max
Differential Nonlinearity, T
MIN
to T
MAX
±0.5 ±0.5 ±0.5 LSB typ Guaranteed No Missing Codes
Positive Full-Scale Error
3
±4 ±4 ±4 LSB typ
±16 ±16 ±16 LSB max
Full-Scale Drift
4
±19/±37 ±19 ±19 LSB typ
Unipolar Offset Error
3
±4 ±4 ±4 LSB typ
±16 ±16 ±16 LSB max
Unipolar Offset Drift
4
±26 ±26 ±26 LSB typ Temp Range: 0°C to +70°C
±67 +48/–400 ±67 ±67 LSB typ Specified Temp Range
Bipolar Zero Error
3
±4 ±4 ±4 LSB typ
±16 ±16 ±16 LSB max
Bipolar Zero Drift
4
±13 ±13 ±13 LSB typ Temp Range: 0°C to +70°C
±34 +24/–200 ±34 ±34 LSB typ Specified Temp Range
Bipolar Negative Full-Scale Errors
3
±8 ±8 ±8 LSB typ
±32 ±32 ±32 LSB max
Bipolar Negative Full-Scale Drift
4
±10/±20 ±10 ±10 LSB typ
Noise (Referred to Output) 1.6 1.6 1.6 LSB rms typ
DYNAMIC PERFORMANCE
Sampling Frequency, f
S
f
CLKIN
/256 f
CLKIN
/256 f
CLKIN
/256 Hz
Output Update Rate, f
OUT
f
CLKIN
/1024 f
CLKIN
/1024 f
CLKIN
/1024 Hz
Filter Corner Frequency, f
–3 dB
f
CLKIN
/409,600 f
CLKIN
/409,600 f
CLKIN
/409,600 Hz
Settling Time to ±0.0007% FS 507904/f
CLKIN
507904/f
CLKIN
507904/f
CLKIN
sec For Full-Scale Input Step
SYSTEM CALIBRATION
Positive Full-Scale Calibration Range V
REF
+ 0.1 V
REF
+ 0.1 V
REF
+ 0.1 V max System calibration applies to
Positive Full-Scale Overrange V
REF
+ 0.1 V
REF
+ 0.1 V
REF
+ 0.1 V max unipolar and bipolar ranges.
Negative Full-Scale Overrange –(V
REF
+ 0.1) –(V
REF
+ 0.1) –(V
REF
+ 0.1) V max After calibration, if A
IN
> V
REF
,
Maximum Offset Calibration Ranges
5, 6
the device will output all 1s.
Unipolar Input Range –(V
REF
+ 0.1) –(V
REF
+ 0.1) –(V
REF
+ 0.1) V max If A
IN
< 0 (unipolar) or –V
REF
Bipolar Input Range –0.4 V
REF
to +0.4 V
REF
–0.4 V
REF
to +0.4 V
REF
–0.4 V
REF
to +0.4 V
REF
V max (bipolar), the device will
Input Span
7
0.8 V
REF
0.8 V
REF
0.8 V
REF
V min output all 0s.
2 V
REF
+ 0.2 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 0 to 2.5 V
Bipolar Input Range ±2.5 ±2.5 ±2.5 V
Input Capacitance 20 20 20 pF typ
Input Bias Current
1
111nA typ
LOGIC INPUTS
All Inputs Except CLKIN
V
INL
, Input Low Voltage 0.8 0.8 0.8 V max
V
INH
, Input High Voltage 2.0 2.0 2.0 V min
CLKIN
V
INL
, Input Low Voltage 0.8 0.8 0.8 V max
V
INH
, Input High Voltage 3.5 3.5 3.5 V min
I
IN
, Input Current 10 10 10 µA max
LOGIC OUTPUTS
V
OL
, Output Low Voltage 0.4 0.4 0.4 V max I
SINK
= 1.6 mA
V
OH
, Output High Voltage DV
DD
– 1DV
DD
– 1DV
DD
– 1V min I
SOURCE
= 100 µA
Floating State Leakage Current ±10 ±10 ±10 µA max
Floating State Output Capacitance 999pF typ
POWER REQUIREMENTS
Power Supply Voltages
Analog Positive Supply (AV
DD
) 4.5/5.5 4.5/5.5 4.5/5.5 V min/V max For Specified Performance
Digital Positive Supply (DV
DD
) 4.5/AV
DD
4.5/AV
DD
4.5/AV
DD
V min/V max
Analog Negative Supply (AV
SS
) –4.5/–5.5 –4.5/–5.5 –4.5/–5.5 V min/V max
Digital Negative Supply (DV
SS
) –4.5/–5.5 –4.5/–5.5 –4.5/–5.5 V min/V max
Calibration Memory Retention
Power Supply Voltage 2.0 2.0 2.0 V min
(T
A
= 25ⴗC; AV
DD
= DV
DD
= +5 V; AV
SS
= DV
SS
= –5 V; V
REF
= +2.5 V; f
CLKIN
= 4.096 MHz;
BP/UP = +5 V; MODE = +5 V; A
IN
Source Resistance = 1 k⍀
1
with 1 nF to AGND at A
IN
; unless otherwise noted.)