AD7621
SPECIFICATIONS
AVDD = DVDD = 2.5 V; OVDD = 2.3 V to 3.6 V; VREF = 2.5 V; all specifications TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Conditions
Min
Typ Max
Unit
RESOLUTION
16
Bits
ANALOG INPUT
Voltage Range
Operating Input Voltage
Analog Input CMRR
Input Current
Input Impedance2
VIN+ − VIN−
VIN+, VIN− to AGND
fIN = 100 kHz
3 MSPS throughput
−VREF
−0.1
VREF
V
AVDD1
V
55
dB
25
μA
THROUGHPUT SPEED
Complete Cycle
Wideband warp, warp modes
333
ns
Throughput Rate
Wideband warp, warp modes 0.001
3
MSPS
Time Between Conversions
Wideband warp, warp modes
1
ms
Complete Cycle
Throughput Rate
Complete Cycle
Throughput Rate
Normal mode
Normal mode
0
Impulse mode
Impulse mode
0
500
ns
2
MSPS
800
ns
1.25
MSPS
DC ACCURACY
Integral Linearity Error3
No Missing Codes
Differential Linearity Error
Transition Noise
Transition Noise
Zero Error, TMIN to TMAX5
Zero Error Temperature Drift
Gain Error, TMIN to TMAX5
Gain Error Temperature Drift
Power Supply Sensitivity
All modes
VREF = 2.048 V, PDREF = high
VREF = 2.048 V, PDREF = high
VREF = 2.048 V, PDREF = high
VREF = 2.5 V
VREF = 2.048 V
AVDD = 2.5 V ± 5%
−2
16
−1
−30
−0.38
±1 +2
+2
0.69
0.82
+30
±1
+0.38
±2
±3
LSB4
Bits
LSB
LSB
LSB
LSB
ppm/°C
% of FSR
ppm/°C
LSB
AC ACCURACY
Dynamic Range
fIN = 20 kHz, VREF = 2.5 V
90.5
dB6
Signal-to-Noise
fIN = 20 kHz, VREF = 2.5 V
88
90
dB
fIN = 20 kHz, VREF = 2.048 V
86
88
dB
fIN = 100 kHz, VREF = 2.5 V
89.2
dB
Spurious-Free Dynamic Range
fIN = 20 kHz
103
dB
fIN = 100 kHz
101
dB
Total Harmonic Distortion
fIN = 20 kHz
–102
dB
fIN = 100 kHz
−100
dB
Signal-to-(Noise + Distortion)
fIN = 20 kHz, VREF = 2.5 V
87.5
89.8
dB
fIN = 20 kHz, VREF = 2.048 V
87.5
dB
fIN = 100 kHz, VREF = 2.5 V
89
dB
–3 dB Input Bandwidth
50
MHz
SAMPLING DYNAMICS
Aperture Delay
Aperture Jitter
Transient Response
Full-scale step
1
5
50
ns
ps rms
ns
INTERNAL REFERENCE
Output Voltage
Temperature Drift
Line Regulation
PDREF = PDBUF = low
REF @ 25°C
–40°C to +85°C
AVDD = 2.5 V ± 5%
2.038
2.048
±7
±15
2.058
V
ppm/°C
ppm/V
Rev. A | Page 3 of 32