AD7942 Analog Devices, AD7942 Datasheet - Page 3

• Manufacturer Part Number: AD7942
• Manufacturer: Analog Devices

Specifications of AD7942

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

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