AD7609BSTZ Analog Devices Inc, AD7609BSTZ Datasheet - Page 20

• Manufacturer Part Number: AD7609BSTZ
• Description: 58T8900
• Manufacturer: Analog Devices Inc

Specifications of AD7609BSTZ

• Resolution (bits): 18bit
• Sampling Rate: 250kSPS
• Input Channel Type: Differential
• Data Interface: Serial, SPI
• Supply Voltage Range - Analog: 4.75V To 5.25V
• Rohs Compliant: Yes

AD7609
Power Supply Rejection (PSR)
Variations in power supply affect the full-scale transition but
not the converter’s linearity. Power supply rejection is the
maximum change in full-scale transition point due to a change
in power supply voltage from the nominal value. 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 ADC V
of Frequency f
where:
Pf is equal to the power at Frequency f in the ADC output.
Pf
and V
S
is equal to the power at Frequency f
PSRR (dB) = 10 log (Pf/Pf
SS
supplies.
S
.
S
)
S
coupled onto the V
DD
and V
SS
supplies
DD
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Channel-to-Channel Isolation
Channel-to-channel isolation is a measure of the level of crosstalk
between any two channels. It is measured by applying a full-scale,
10 kHz sine wave signal to all unselected input channels and
determining the degree to which the signal attenuates in the
selected channel with a 1 kHz signal.
Common-Mode Rejection Ratio (CMRR)
CMRR is defined as the ratio of the power in the ADC
common-mode input at full-scale frequency, f, to the power in
the output of a full-scale p-p sine wave applied to the common-
mode voltage of V
where:
Pf is equal to the power at Frequency f in the ADC input.
Pf
S
is equal to the power at Frequency f
CMRR (dB) = 20 log (Pf/Pf
IN
X+ and V
IN
X− of frequency, f
S
)
S
in the ADC output.
S
,