AD7656-1 Analog Devices, AD7656-1 Datasheet - Page 19

• 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 19 shows the power supply rejection ratio vs. supply
ripple frequency for the AD7656-1/AD7657-1/AD7658-1. The
power supply rejection ratio is defined as the ratio of the power
in the ADC output at full-scale frequency, f, to the power of a
200 mV p-p sine wave applied to the V
ADC at a frequency sampled, f
where:
Pf is equal to the power at Frequency f in the ADC output.
Pf
V
DD
S
is equal to the power at Frequency f
and V
PSRR (dB) = 10 log(Pf/Pf
SS
supplies.
S
)
SAMPLE
, as follows:
DD
SAMPLE
and V
coupled onto the
SS
supplies of the
Rev. C | Page 19 of 32
% FSR
%FSR is calculated using the full theoretical span of the ADC.
AD7656-1/AD7657-1/AD7658-1