AD7949 Analog Devices, AD7949 Datasheet - Page 3

• Manufacturer Part Number: AD7949
• Description: 14-Bit, 8-Channel, 250 kSPS PulSAR ADC
• Manufacturer: Analog Devices

Specifications of AD7949

• Resolution (bits): 14bit
• # Chan: 8
• Sample Rate: 250kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Adc Architecture: SAR
• Pkg Type: CSP

Data Sheet
SPECIFICATIONS
VDD = 2.3 V to 5.5 V, VIO = 1.8 V to VDD, V
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
THROUGHPUT
ACCURACY
AC ACCURACY
SAMPLING DYNAMICS
SINAD
Total Harmonic Distortion
Voltage Range
Absolute Input Voltage
Analog Input CMRR
Leakage Current at 25°C
Input Impedance
Conversion Rate
Transient Response
No Missing Codes
Integral Linearity Error
Differential Linearity Error
Transition Noise
Gain Error
Gain Error Match
Gain Error Temperature Drift
Offset Error
Offset Error Match
Offset Error Temperature Drift
Power Supply Sensitivity
Dynamic Range
Signal-to-Noise
Spurious-Free Dynamic Range
Channel-to-Channel Crosstalk
−3 dB Input Bandwidth
Aperture Delay
Full Bandwidth
¼ Bandwidth
4
4
5
2
1
2
Conditions/Comments
Unipolar mode
Bipolar mode
Positive input, unipolar and bipolar modes
Negative or COM input, unipolar mode
Negative or COM input, bipolar mode
f
Acquisition phase
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
VDD = 4.5 V to 5.5 V
VDD = 2.3 V to 4.5 V
Full-scale step, full bandwidth
Full-scale step, ¼ bandwidth
REF = VDD = 5 V
VDD = 5 V ± 5%
f
f
f
f
f
f
f
f
f
f
Full bandwidth
¼ bandwidth
VDD = 5 V
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
= 250 kHz
= 20 kHz, V
= 20 kHz, V
= 20 kHz, V
= 20 kHz, V
= 20 kHz, V
= 20 kHz, V
= 20 kHz, V
= 20 kHz
= 20 kHz
= 100 kHz on adjacent channel(s)
REF
= VDD, all specifications T
REF
REF
REF
REF
REF
REF
REF
= 2.5 V internal REF
= 4.096 V internal REF
= 2.5 V internal REF
= 5 V
= 4.096 V internal REF
= 5 V
= 5 V, −60 dB input
Rev. C | Page 3 of 32
MIN
to T
MAX
, unless otherwise noted.
Min
14
0
−V
−0.1
−0.1
V
0
0
0
0
14
−1
−1
−5
−1
−1
84.5
84
REF
REF
/2 − 0.1
/2
Typ
V
68
1
±0.5
±0.25
0.1
±0.5
±0.2
±1
±0.5
±0.2
±1
±0.2
85.6
85.5
85
84
85
33.5
85
84
−100
108
−125
1.7
0.425
2.5
REF
/2
Max
+V
+V
V
+0.1
V
250
200
62.5
50
1.8
14.5
+1
+1
+5
+1
+1
REF
REF
REF
REF
/2 + 0.1
+ 0.1
/2
AD7949
Unit
Bits
V
V
dB
nA
kSPS
kSPS
kSPS
kSPS
μs
μs
Bits
LSB
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
ppm/°C
LSB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
MHz
ns
6
3