Datasheet

Data Sheet AD7656-1/AD7657-1/AD7658-1
Rev. D | Page 5 of 32
AD7657-1
V
REF
= 2.5 V internal/external, AV
CC
= 4.75 V to 5.25 V, DV
CC
= 4.75 V to 5.25 V, V
DRIVE
= 2.7 V to 5.25 V; for the ±4 × V
REF
range, V
DD
=
10 V to 16.5 V, V
SS
= −10 V to −16.5 V; for the ±2 × V
REF
range, V
DD
= 5 V to 16.5 V, V
SS
= −5 V to −16.5 V; f
SAMPLE
= 250 kSPS, T
A
= T
MIN
to
T
MAX
, unless otherwise noted.
Table 2.
Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE f
IN
= 10 kHz sine wave
Signal-to-(Noise + Distortion)
(SINAD)
1
82.5 dB
Signal-to-Noise Ratio (SNR)
1
83.5 dB
Total Harmonic Distortion (THD)
1
−90 dB
−105 dB
Peak Harmonic or Spurious Noise
(SFDR)
1
−100 dB
Intermodulation Distortion (IMD)
1
fa = 10.5 kHz, fb = 9.5 kHz
Second-Order Terms −109 dB
Third-Order Terms −104 dB
Aperture Delay 10 ns
Aperture Delay Matching 4 ns
Aperture Jitter 35 ps
Channel-to-Channel Isolation
1
−100 dB f
IN
on unselected channels up to 100 kHz
Full-Power Bandwidth
4.5
MHz
@ −3 dB
2.2 MHz @ −0.1 dB
DC ACCURACY
Resolution 14 Bits
No Missing Codes 14 Bits
Integral Nonlinearity
1
±1 LSB
±1
Positive Full-Scale Error
1
±0.95 % FSR ±0.27% FSR typical
Positive Full-Scale Error Matching
1
±0.366 % FSR
Bipolar Zero-Scale Error
1
±0.04 % FSR ±0.016% FSR typical
Bipolar Zero-Scale Error Matching
1
±0.0427 % FSR
Negative Full-Scale Error
1
±0.95 % FSR ±0.27% FSR typical
Negative Full-Scale Error Matching
1
±0.366 % FSR
ANALOG INPUT See Table 8 for minimum V
DD
/V
SS
for each range
Input Voltage Ranges −4 × V
REF
+4 × V
REF
V RNGx bits or RANGE pin = 0
−2 × V
REF
+2 × V
REF
V RNGx bits or RANGE pin = 1
DC Leakage Current
±1
µA
Input Capacitance
2
10 pF ±4 × V
REF
range when in track
14 pF ±2 × V
REF
range when in track
REFERENCE INPUT/OUTPUT
Reference Input Voltage Range 2.5 2.5 V
DC Leakage Current ±1 µA
Input Capacitance
2
18.5 pF
REF
EN/
DIS
= 1
Reference Output Voltage
2.49
2.51
V
Long-Term Stability 150 ppm 1000 hours
Reference Temperature Coefficient 25 ppm/°C
6 ppm/°C
LOGIC INPUTS
Input High Voltage (V
INH
) 0.7 × V
DRIVE
V
Input Low Voltage (V
INL
) 0.3 × V
DRIVE
V
Input Current (I
IN
) ±10 µA Typically 10 nA, V
IN
= 0 V or V
DRIVE
Input Capacitance (C
IN
)
2
10 pF