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AD7656-1 Datasheet(PDF) 5 Page - Analog Devices

Part # AD7656-1
Description  250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7656-1 Datasheet(HTML) 5 Page - Analog Devices

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AD7656-1/AD7657-1/AD7658-1
Rev. 0 | Page 5 of 32
AD7657-1
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
TMAX, unless otherwise noted.
Table 2.
Parameter
B Version1
Y Version1
Unit
Test Conditions/Comments
DYNAMIC PERFORMANCE
fIN = 10 kHz sine wave
Signal-to-(Noise + Distortion) (SINAD)2
82.5
82.5
dB typ
Signal-to-Noise Ratio (SNR)2
83.5
83.5
dB typ
Total Harmonic Distortion (THD)2
−90
−90
dB max
−105
−105
dB typ
Peak Harmonic or Spurious Noise (SFDR)2
−100
−100
dB typ
Intermodulation Distortion (IMD)2
fa = 10.5 kHz, fb = 9.5 kHz
Second-Order Terms
−109
−109
dB typ
Third-Order Terms
−104
−104
dB typ
Aperture Delay
10
10
ns max
Aperture Delay Matching
4
4
ns max
Aperture Jitter
35
35
ps typ
Channel-to-Channel Isolation2
−100
−100
dB typ
fIN on unselected channels up to 100 kHz
Full-Power Bandwidth
4.5
4.5
MHz typ
@ −3 dB
2.2
2.2
MHz typ
@ −0.1 dB
DC ACCURACY
Resolution
14
14
Bits
No Missing Codes
14
14
Bits min
Integral Nonlinearity2
±1
±1
LSB max
±1
±1
LSB typ
Positive Full-Scale Error2
±0.95
±0.95
% FS max
±0.27% FSR typical
Positive Full-Scale Error Matching2
±0.366
±0.366
% FS max
Bipolar Zero-Scale Error2
±0.04
±0.04
% FS max
±0.016% FSR typical
Bipolar Zero-Scale Error Matching2
±0.0427
±0.0427
% FS max
Negative Full-Scale Error2
±0.95
±0.95
% FS max
±0.27% FSR typical
Negative Full-Scale Error Matching2
±0.366
±0.366
% FS max
ANALOG INPUT
See Table 8 for minimum VDD/VSS for
each range
Input Voltage Ranges
±4 × VREF
±4 × VREF
V
RNGx bits or RANGE pin = 0
±2 × VREF
±2 × VREF
V
RNGx bits or RANGE pin = 1
DC Leakage Current
±1
±1
μA max
Input Capacitance3
10
10
pF typ
±4 × VREF range when in track
14
14
pF typ
±2 × VREF range when in track
REFERENCE INPUT/OUTPUT
Reference Input Voltage Range
2.5
2.5
V min/max
DC Leakage Current
±1
±1
μA max
Input Capacitance3
18.5
18.5
pF typ
REFEN/DIS = 1
Reference Output Voltage
2.49/2.51
2.49/2.51
V min/max
Long-Term Stability
150
150
ppm typ
1000 hours
Reference Temperature Coefficient
25
25
ppm/°C max
6
6
ppm/°C typ
LOGIC INPUTS
Input High Voltage (VINH)
0.7 × VDRIVE
0.7 × VDRIVE
V min
Input Low Voltage (VINL)
0.3 × VDRIVE
0.3 × VDRIVE
V max
Input Current (IIN)
±10
±10
μA max
Typically 10 nA, VIN = 0 V or VDRIVE
Input Capacitance (CIN)3
10
10
pF max


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