AD7984 Analog Devices, AD7984 Datasheet - Page 3

• Manufacturer Part Number: AD7984
• Description: 18-Bit, 1.33 MSPS PulSAR 10.5 mW ADC in MSOP/QFN
• Manufacturer: Analog Devices

Specifications of AD7984

• Resolution (bits): 18bit
• # Chan: 1
• Sample Rate: 1.33MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, REF = 5 V, T
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
ACCURACY
THROUGHPUT
AC ACCURACY
1
2
3
4
All specifications expressed in decibels are referred to a full-scale input FSR and tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
LSB means least significant bit. With the ±5 V input range, one LSB is 38.15 μV.
See Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
Tested fully in production at f
Common-Mode Input Range
Signal-to-Noise, SNR
Voltage Range
Absolute Input Voltage
Analog Input CMRR
Leakage Current at 25°C
Input Impedance
No Missing Codes
Differential Linearity Error
Integral Linearity Error
Transition Noise
Gain Error, T
Gain Error Temperature Drift
Zero Error, T
Zero Temperature Drift
Power Supply Sensitivity
Conversion Rate
Transient Response
Dynamic Range
Spurious-Free Dynamic Range, SFDR
Total Harmonic Distortion
Signal-to-(Noise + Distortion), SINAD
MIN
MIN
to T
to T
MAX
MAX
3
3
IN
= 1 kHz.
4
, THD
Conditions
IN+ − IN−
IN+, IN−
IN+, IN−
f
Acquisition phase
VDD = 2.5 V ± 5%
Full-scale step
V
f
f
f
f
IN
IN
IN
IN
IN
REF
= 450 kHz
= 1 kHz, V
= 10 kHz
= 10 kHz
= 10 kHz, V
A
= 5 V
= −40°C to +85°C, unless otherwise noted.
REF
REF
= 5 V, T
Rev. A | Page 3 of 24
= 5 V, T
A
A
= 25°C
= 25°C
Min
18
−V
−0.1
V
18
−1
−2.25
−0.075
−700
0
96.5
REF
REF
× 0.475
See the Analog Inputs section
Typ
V
67
200
0.95
±0.022
−0.6
±100
0.3
90
99.7
98.5
112.5
−110.5
98
REF
× 0.5
Max
+V
V
V
+1.5
+2.25
+0.075
+700
1.33
290
REF
REF
REF
+ 0.1
× 0.525
AD7984
Unit
Bits
V
V
V
dB
nA
Bits
LSB
LSB
LSB
% of FS
ppm/°C
μV
ppm/°C
dB
MSPS
ns
dB
dB
dB
dB
dB
1
1
1
1
1
1
1
2
2
2