AD7656-1 Analog Devices, AD7656-1 Datasheet - Page 17

• Manufacturer Part Number: AD7656-1
• Description: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC
• Manufacturer: Analog Devices

Specifications of AD7656-1

• Resolution (bits): 16bit
• # Chan: 6
• Sample Rate: 250kSPS
• Interface: Par,Ser,SPI
• Analog Input Type: SE-Bip
• Ain Range: 10V p-p,20 V p-p,Bip 10V,Bip 5.0V
• Adc Architecture: SAR
• Pkg Type: QFP

Figure 22. Channel-to-Channel Isolation vs. Frequency of Input Noise
120
110
100
22
20
18
16
14
12
10
90
80
70
60
–40
0
AV
f
FOR ±5V RANGE V
FOR ±10V RANGE V
SAMPLE
AV
V
T
INTERNAL REFERENCE
±2 × V
30kHz ON SELECTED CHANNEL
DD
A
CC
Figure 23. Dynamic Current vs. Temperature
CC
= 25°C
–20
/V
/DV
/DV
SS
20
REF
= 250kSPS
CC
= ±12V
CC
RANGE
/V
/V
FREQUENCY OF INPUT NOISE (kHz)
DRIVE
0
DRIVE
40
±10V RANGE
DD
= 5V
DD
TEMPERATURE (°C)
= 5V
20
/V
/V
SS
60
SS
±5V RANGE
= ±12V
= ±16.5V
40
80
60
100
80
120
100
140
120
Rev. C | Page 17 of 32
Figure 24. PSRR vs. Supply Ripple Frequency for AV
95
90
85
80
75
70
65
60
30
AD7656-1/AD7657-1/AD7658-1
70
SUPPLY RIPPLE FREQUENCY (kHz)
110
f
±2 × V
INTERNAL REFERENCE
T
f
1µF ON AV
±100mV SUPPLY RIPPLE AMPLITUDE
SAMPLE
IN
A
= 25°C
= 10kHz
REF
= 250kSPS
150
RANGE
CC
SUPPLY PIN
190
CC
Supply
230