AD7985 Analog Devices, AD7985 Datasheet - Page 3

• Manufacturer Part Number: AD7985
• Description: 16-Bit, 2.5 MSPS PulSAR 11 mW ADC in QFN
• Manufacturer: Analog Devices

Specifications of AD7985

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 2.5MSPS
• Interface: Ser,SPI
• Analog Input Type: SE-Uni
• Ain Range: (Vref) p-p,Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: CSP

SPECIFICATIONS
AVDD = DVDD = 2.5 V, BVDD = 5 V, VIO = 1.8 V to 2.7 V, V
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
ACCURACY
THROUGHPUT
AC ACCURACY
SAMPLING DYNAMICS
1
2
3
4
LSB means least significant bit. With the ±4.096 V input range, one LSB is 62.5 µV.
See the Terminology section. These specifications include full temperature range variation but not the error contribution from the external reference.
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.
Tested fully in production at f
Signal-to-Noise-and-Distortion Ratio,
Voltage Range
Absolute Input Voltage
Leakage Current at 25°C
Input Impedance
No Missing Codes
Differential Nonlinearity Error, DNL
Integral Nonlinearity Error, INL
Transition Noise
Gain Error, T
Gain Error Temperature Drift
Zero Error, T
Zero Temperature Drift
Power Supply Sensitivity
Conversion Rate
Transient Response
Dynamic Range
Signal-to-Noise Ratio, SNR
Spurious-Free Dynamic Range, SFDR
Total Harmonic Distortion
−3 dB Input Bandwidth
Aperture Delay
SINAD
MIN
MIN
to T
to T
MAX
MAX
2
2
IN
= 1 kHz.
4
, THD
Test Conditions/Comments
(IN+) − (IN−)
IN+
IN−
Acquisition phase
AVDD = 2.5 V ± 5%
Full-scale step
V
V
f
reference
f
reference
f
f
reference
f
IN
IN
IN
IN
IN
REF
REF
= 20 kHz, V
= 20 kHz, V
= 20 kHz
= 20 kHz, V
= 20 kHz, V
= 4.096 V, internal reference
= 5.0 V, external reference
REF
REF
REF
REF
Rev. A | Page 3 of 28
= 4.096 V, internal
= 5.0 V, external
= 4.096 V, internal
= 4.096 V
REF
= 4.096 V, T
A
= −40°C to +85°C, unless otherwise noted.
Min
16
0
−0.1
−0.1
16
−0.99
−1.50
−15
−0.99
0
87.5
89.0
87.0
89.0
See the Analog Inputs section
Typ
250
±0.50
±0.7
0.8
±2
±0.8
±0.08
0.55
90
89
90
88.5
90.0
103
−100
90.5
19
0.7
Max
V
V
+0.1
+0.99
+1.50
+15
+0.99
2.5
100
REF
REF
+ 0.1
AD7985
Unit
Bits
V
V
V
nA
Bits
LSB
LSB
LSB
LSB
ppm/°C
mV
ppm/°C
dB
MSPS
ns
dB
dB
dB
dB
dB
dB
dB
MHz
ns
3
3
3
3
3
3
3
3
1
1
1
1