Datasheet

–2–
REV. B
AD7811/AD7812–SPECIFICATIONS
Parameter Y Version Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 30 kHz Any Channel, f
SAMPLE
= 350 kHz
Signal to (Noise + Distortion) Ratio
1
58 dB min V
REF
Internal or External
Total Harmonic Distortion (THD)
1
–66 dB max
Peak Harmonic or Spurious Noise
1
–80 dB typ
Intermodulation Distortion
1, 2
fa = 29 kHz, fb = 30 kHz
Second Order Terms –67 dB max
Third Order Terms –67 dB max
Channel-to-Channel Isolation
1, 2
–80 dB typ f
IN
= 20 kHz
DC ACCURACY Any Channel
Resolution 10 Bits
Minimum Resolution for Which
No Missing Codes are Guaranteed 10 Bits
Relative Accuracy
1
± 1 LSB max
Differential Nonlinearity
1
± 1 LSB max
Gain Error
1
± 2 LSB max
Gain Error Match
1
± 0.75 LSB max
Offset Error
1
± 2 LSB max
Offset Error Match
1
± 0.75 LSB max
ANALOG INPUT
Input Voltage Range 0 V min
V
REF
V max
Input Leakage Current
2
± 1 µA max
Input Capacitance
2
20 pF max
REFERENCE INPUTS
2
V
REF
Input Voltage Range 1.2 V min
V
DD
V max
Input Leakage Current ± 3 µA max
Input Capacitance 20 pF max
ON-CHIP REFERENCE Nominal 2.5 V
Reference Error ± 2.5 % max
Temperature Coefficient 50 ppm/°C typ
LOGIC INPUTS
2
V
INH
,
Input High Voltage 2.4 V min V
DD
= 5 V ± 10%
V
INL
, Input Low Voltage 0.8 V max V
DD
= 5 V ± 10%
V
INH
,
Input High Voltage 2 V min V
DD
= 3 V ± 10%
V
INL
, Input Low Voltage 0.4 V max V
DD
= 3 V ± 10%
Input Current, I
IN
± 1 µA max Typically 10 nA, V
IN
= 0 V to V
DD
Input Capacitance, C
IN
8 pF max
LOGIC OUTPUTS
Output High Voltage, V
OH
I
SOURCE
= 200 µA
4V minV
DD
= 5 V ± 10%
2.4 V min V
DD
= 3 V ± 10%
Output Low Voltage, V
OL
I
SINK
= 200 µA
0.4 V max
High Impedance Leakage Current ± 1 µA max
High Impedance Capacitance 15 pF max
CONVERSION RATE
Conversion time 2.3 µs max
Track/Hold Acquisition Time
1
200 ns max
(V
DD
= 2.7 V to 3.6 V, V
DD
= 5 V 10%, GND = 0 V, V
REF
= V
DD
[EXT]. All specifications –40C to +105C
unless otherwise noted.)