AD7688 Analog Devices, AD7688 Datasheet - Page 3

• Manufacturer Part Number: AD7688
• Manufacturer: Analog Devices

Specifications of AD7688

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,SOP

SPECIFICATIONS
VDD = 4.5 V to 5.5 V, VIO = 2.3 V to VDD, V
Table 2.
Parameter
RESOLUTION
ANALOG INPUT
ACCURACY
THROUGHPUT
AC ACCURACY
1
2
3
4
All specifications in dB are referred to a full-scale input FS. 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 152.6 μV.
See the Terminology section. These specifications do include full temperature range variation but do not include the error contribution from the external reference.
f
IN1
Voltage Range
Absolute Input Voltage
Common-Mode Input Range
Analog Input CMRR
Leakage Current at 25°C
Input Impedance
No Missing Codes
Differential Linearity Error
Integral Linearity Error
Transition Noise
Gain Error
Gain Error Temperature Drift
Zero Error
Zero Temperature Drift
Power Supply Sensitivity
Conversion Rate
Transient Response
Dynamic Range
Signal-to-Noise
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise + Distortion)
Intermodulation Distortion
= 21.4 kHz, f
2
2
, T
, T
IN2
MIN
MIN
= 18.9 kHz, each tone at −7 dB below full-scale.
to T
to T
MAX
MAX
4
Conditions
IN+ − IN−
IN+, IN−
Acquisition phase
REF = VDD = 5 V
VDD = 5V ± 5%
Full-scale step
V
f
f
f
f
IN+, IN−
f
f
f
IN
IN
IN
IN
IN
IN
IN
REF
= 250 kHz
= 20 kHz, V
= 20 kHz, V
= 20 kHz
= 20 kHz
= 20 kHz, V
= 20 kHz, V
REF
= 5 V
= VDD, T
REF
REF
REF
REF
= 5 V
= 5 V
= 5 V
= 5 V, −60 dB input
A
Rev. A | Page 3 of 28
= –40°C to +85°C, unless otherwise noted.
Min
16
−V
−0.1
0
16
−1
−1.5
0
95.8
94
93.5
REF
See the Analog Input section
Typ
V
65
1
±0.4
±0.4
0.4
±2
±0.3
±0.1
±0.3
±0.05
96.5
95.5
92.5
−118
−118
95
36.5
115
REF
/2
Max
+V
V
V
+1
+1.5
±6
±1.6
500
400
REF
REF
REF
/2 + 0.1
+ 0.1
AD7688
Unit
Bits
V
V
V
dB
nA
Bits
LSB
LSB
LSB
LSB
ppm/°C
mV
ppm/°C
LSB
kSPS
ns
dB
dB
dB
dB
dB
dB
dB
dB
3
1