Datasheet

AD7294 Data Sheet
Rev. H | Page 6 of 48
ADC SPECIFICATIONS
AV
DD
= DV
DD
= 4.5 V to 5.5 V, AGND = DGND = 0 V, V
REF
= 2.5 V internal or external; V
DRIVE
= 2.7 V to 5.5 V; V
PP
= AV
DD
to 59.4 V;
T
A
= −40°C to +105°C, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
DC ACCURACY
Resolution 12 Bits
Integral Nonlinearity (INL)
1
±0.5 ±1 LSB Differential mode
±0.5 ±1.5 LSB Single-ended or pseudo differential mode
Differential Nonlinearity (DNL)
1
±0.5 ±0.99 LSB Differential, single-ended, and pseudo differential
modes
Single-Ended Mode
Offset Error ±1 ±7 LSB
Offset Error Match ±0.4 LSB
Gain Error ±0.5 ±2.5 LSB
Gain Error Match ±0.4 LSB
Differential Mode
Positive Gain Error ±1 LSB
Positive Gain Error Match ±0.5 LSB
Zero Code Error ±3 LSB
Zero Code Error Match ±0.5 LSB
Negative Gain Error ±1 LSB
Negative Gain Error Match ±0.5 LSB
CONVERSION RATE
Conversion Time
2
3 μs
Autocycle Update Rate
2
50 μs
Throughput Rate 22.22 kSPS f
SCL
= 400 kHz
ANALOG INPUT
3
Single-Ended Input Range 0 V
REF
V 0 V to V
REF
mode
0 2 × V
REF
V 0 V to 2 × V
REF
mode
Pseudo Differential Input Range: V
IN+
− V
IN−
4
0 V
REF
0 V to V
REF
mode
0 2 × V
REF
0 V to 2 × V
REF
mode
Fully Differential Input Range: V
IN+
− V
IN−
−V
REF
+V
REF
0 V to V
REF
mode
−2 × V
REF
+2 × V
REF
0 V to 2 × V
REF
mode
Input Capacitance
2
30 pF
DC Input Leakage Current ±1 µA
DYNAMIC PERFORMANCE
Signal-to-Noise Ratio (SNR)
1
73 dB f
IN
= 10 kHz sine wave; differential mode
72 dB f
IN
= 10 kHz sine wave; single-ended and pseudo
differential modes
Signal-to-Noise + Distortion (SINAD) Ratio
1
71.5 dB f
IN
= 10 kHz sine wave; differential mode
72.5 dB f
IN
= 10 kHz sine wave; single-ended and pseudo
differential modes
Total Harmonic Distortion (THD)
1
−81 dB f
IN
= 10 kHz sine wave; differential mode
−79 dB f
IN
= 10 kHz sine wave; single-ended and pseudo
differential modes
Spurious-Free Dynamic Range (SFDR)
1
−81 dB f
IN
= 10 kHz sine wave; differential mode
−79 f
IN
= 10 kHz sine wave; single-ended and pseudo
differential modes
Channel-to-Channel Isolation
2
−90 dB f
IN
= 10 kHz to 40 kHz