Data Sheet
AD7656-1/AD7657-1/AD7658-1
SPECIFICATIONS
AD7656-1
VREF = 2.5 V internal/external, AVCC = 4.75 V to 5.25 V, DVCC = 4.75 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V; for the 4 × VREF range, VDD
10 V to 16.5 V, VSS = −10 V to −16.5 V; for the 2 × VREF range, VDD = 5 V to 16.5 V, VSS = −5 V to −16.5 V; fSAMPLE = 250 kSPS, TA = TMIN to
MAX, unless otherwise noted.
=
T
Table 1.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
Signal-to-(Noise + Distortion) (SINAD)1
Signal-to-Noise Ratio (SNR)1
Total Harmonic Distortion (THD)1
fIN = 10 kHz sine wave
88
88
dB
dB
dB
dB
dB
−90
−105
−100
VDD/VSS = 5 V to 16.5 V
fa = 10.5 kHz, fb = 9.5 kHz
Peak Harmonic or Spurious Noise (SFDR)1
Intermodulation Distortion (IMD)1
Second-Order Terms
−112
−107
dB
dB
Third-Order Terms
Aperture Delay
Aperture Delay Matching
Aperture Jitter
10
4
ns
ns
ps
35
Channel-to-Channel Isolation1
Full-Power Bandwidth
−100
4.5
2.2
dB
MHz
MHz
fIN on unselected channels up to 100 kHz
@ −3 dB
@ −0.1 dB
DC ACCURACY
Resolution
16
Bits
No Missing Codes
B Version
Y Version
Integral Nonlinearity1
15
14
Bits
Bits
LSB
3
1
LSB
% FSR
% FSR
Positive Full-Scale Error1
Positive Full-Scale Error Matching1
Bipolar Zero-Scale Error1
B Version
0.8
0.35
0.381% FSR typical
0.0137% FSR typical
0.048
0.048
0.038
0.8
% FSR
%F SR
% FSR
% FSR
% FSR
Y Version
Bipolar Zero-Scale Error Matching1
Negative Full-Scale Error1
Negative Full-Scale Error Matching1
ANALOG INPUT
0.381% FSR typical
0.35
See Table 8 for minimum VDD/VSS for each range
RNGx bits or RANGE pin = 0
RNGx bits or RANGE pin = 1
Input Voltage Ranges
−4 × VREF
−2 × VREF
+4 × VREF
+2 × VREF
1
V
V
µA
pF
pF
DC Leakage Current
Input Capacitance2
10
14
4 × VREF range when in track
2 × VREF range when in track
REFERENCE INPUT/OUTPUT
Reference Input Voltage Range
DC Leakage Current
2.5
2.5
1
V
µA
pF
Input Capacitance2
18.5
150
6
REFEN/DIS = 1
1000 hours
Reference Output Voltage
Long-Term Stability
Reference Temperature Coefficient
2.49
2.51
25
V
ppm
ppm/°C
ppm/°C
Rev. D | Page 3 of 32
ROCHESTER [ Rochester Electronics ]
