AD7722 Analog Devices, AD7722 Datasheet - Page 2

• Manufacturer Part Number: AD7722
• Description: CMOS, 16-Bit, 195 kSPS Sigma-Delta ADC
• Manufacturer: Analog Devices

Specifications of AD7722

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 12.5MSPS
• Interface: Par,Ser
• Analog Input Type: Diff-Bip,Diff-Uni
• Ain Range: (Vref) p-p,2.5V p-p,Uni (Vref),Uni 2.5V
• Adc Architecture: Sigma-Delta
• Pkg Type: QFP

AD7722–SPECIFICATIONS
UNI = Logic Low or High; f
Parameter
DYNAMIC SPECIFICATIONS
ANALOG INPUTS
CLOCK
REFERENCE
STATIC PERFORMANCE
Bipolar Mode, UNI = V
Unipolar Mode, UNI = V
Intermodulation Distortion
AC CMRR
Digital Filter Response
Full-Scale Input Span
Absolute Input Voltage
Input Sampling Capacitance
Input Sampling Rate
Differential Input Impedance
CLKIN Mark Space Ratio
REF1 Output Voltage
REF1 Output Voltage Drift
REF1 Output Impedance
Reference Buffer
Using Internal Reference
Using External Reference
Resolution
Differential Nonlinearity
Integral Nonlinearity
After Calibration
Without Calibration
Offset Error Drift
Gain Error Drift
Signal-to-(Noise + Distortion)
Total Harmonic Distortion
Spurious-Free Dynamic Range
Signal-to-(Noise + Distortion)
Total Harmonic Distortion
Spurious-Free Dynamic Range
Pass-Band Ripple
Cutoff Frequency
Stop-Band Attenuation
Bipolar Mode
Unipolar Mode
Offset Voltage
REF2 Output Voltage
REF2 Output Voltage Drift
REF2 Input Impedance
External Reference Voltage Range
Offset Error
Gain Error
Offset Error
Gain Error
4, 5
5
4
INH
CLKIN
INL
= 12.5 MHz; f
3
3
2
3
3
Test Conditions/Comments
V
or V
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–100 kHz, f
V
Input Bandwidth 0 kHz–90.625 kHz
Input Bandwidth 0 kHz–97.65 kHz
Input Bandwidth 0 kHz–97.65 kHz
V
V
0 kHz to 90.625 kHz
104.6875 kHz to 12.395 MHz
V
UNI = V
UNI = V
V
Guaranteed by Design
Offset between REF1 and REF2
REF1 = AGND
Applied to REF1 or REF2
Guaranteed Monotonic
REF2 Is an Ideal Reference, REF1 = AGND
Unipolar Mode
Bipolar Mode
CM
IN
IN
CM
IN
IN
(–) = 0 V, V
(+) = V
(+) – V
(+) and V
S
IN
= 2.5 V, V
= 1.25 V to 3.75 V, 20 kHz
= 195.3 kSPS; REF2 = 2.5 V; T
(–) = 1.25 V, V
INH
INL
IN
IN
(–)
(–) = 2.5 V p-p
IN
1
(–)
IN
IN
(+) = V
(+) = 0 V to 2.5 V
(AV
DD
IN
(+) = 0 V to 2.5 V
= AV
IN
(–) =1.25 V p-p,
DD1
–2–
= 5 V
CLKIN
CLKIN
CLKIN
A
= T
5%; DV
= 14 MHz 84.5/83
= 14 MHz
= 14 MHz
MIN
to T
MAX
DD
= 5 V
, unless otherwise noted.)
Min
86/84.5
84.5/83
96.92
–V
0
0
45
2.32
2.32
2.32
16
REF2
5%; AGND = AGND1 = DGND = 0 V;
/2
Typ
90
88
–93
96
90
2
2 × f
1/(4 × 10
2.47
60
3
2.47
60
1/(16 × 10
2.5
± 0.5
± 2
± 6
± 0.6
± 1
± 1
± 0.5
A Version
CLKIN
-9
)f
−9
CLKIN
)f
CLKIN
Max
–90/–88
–88/–86
–90
–88
–89/–87
–90
± 0.005
+V
V
AV
55
2.62
± 12
2.62
2.62
± 1
± 3
± 0.6
REF2
REF2
DD
/2
REV. B
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
kHz
dB
V
V
V
pF
Hz
kΩ
%
V
ppm/°C
kΩ
mV
V
ppm/°C
kΩ
V
Bits
LSB
LSB
mV
% FSR
mV
% FSR
LSB/°C
LSB/°C
LSB/°C