AD7942_15 Datasheet, PDF (3/24 Pages) Analog Devices – 14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/LFCSP

Data Sheet
AD7942
SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 2.3 V to VDD, VREF = VDD, TA = –40°C to +85°C, unless otherwise noted.
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
Voltage Range
Absolute Input Voltage
Analog Input CMRR
Leakage Current
Input Impedance
ACCURACY
No Missing Codes
Differential Linearity Error
Integral Linearity Error
Transition Noise
Gain Error², TMIN to TMAX
Gain Error Temperature Drift
Offset Error², TMIN to TMAX
Offset Temperature Drift
Power Supply Sensitivity
THROUGHPUT
Conversion Rate
Transient Response
AC ACCURACY
Signal-to-Noise Ratio (SNR)
Spurious-Free Dynamic Range (SFDR)
Total Harmonic Distortion (THD)
Signal-to-Noise and Distortion Ratio (SINAD)
REFERENCE
Voltage Range
Load Current
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Aperture Delay
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
Conditions
IN+ − IN−
IN+
IN−
fIN = 250 kHz
TA = 25°C, acquisition phase
VREF = VDD = 5 V
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
VDD = 5 V ± 5%
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
Full-scale step
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 2.5 V
fIN = 20 kHz
fIN = 20 kHz
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 5 V, −60 dB input
fIN = 20 kHz, VREF = 2.5 V
250 kSPS, VREF = 5 V
VDD = 5 V
Min
Typ Max
14
0
VREF
−0.1
VDD + 0.1
−0.1
+0.1
65
1
See the Analog Input section
14
−0.7
±0.3 +0.7
−1
±0.4 +1
0.33
±0.7 ±6
±1
±0.45 ±3
±0.75 ±4.5
±2.5
±0.1
0
250
0
200
1.8
84.5
85
84
−100
−100
83
85
25
84
0.5
VDD + 0.3
50
2
2.5
–0.3
0.7 × VIO
−1
−1
+0.3 × VIO
VIO + 0.3
+1
+1
Unit
Bits
V
V
V
dB
nA
Bits
LSB¹
LSB
LSB
LSB
ppm/°C
mV
mV
ppm/°C
LSB
kSPS
kSPS
μs
dB³
dB
dB
dB
dB
dB
dB
V
μA
MHz
ns
V
V
μA
μA
Rev. C | Page 3 of 24