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AD7770 데이터시트(PDF) 8 Page - Analog Devices

부품명 AD7770
상세설명  8-Channel, 24-Bit, Simultaneous Sampling ADC
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AD7770
Data Sheet
Rev. A | Page 8 of 94
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
POWER SUPPLIES
All Σ-Δ channels enabled
AVDD1x − AVSSx
3.0
3.6
V
IAVDD1x4, 5
Reference buffer pre-Q, VCM
enabled, internal reference
enabled
High resolution mode
18.5
23.7
mA
Low power mode
5
6.4
mA
Reference buffer enabled, VCM
enabled, internal reference
enabled
High resolution mode
20.5
26.7
mA
Low power mode
5.5
7.1
mA
Reference buffer disabled, VCM
disabled, internal reference
disabled
High resolution mode
14.3
18.8
mA
Low power mode
3.9
5.1
mA
AVDD2x − AVSSx
2.2
3.6
V
IAVDD2x
High resolution mode
9
9.45
mA
Low power mode
3.5
3.7
mA
AVDD4 − AVSSx
AVDD1x −
0.3
AVDD1x
V
IAVDD4
SAR enabled
1.7
2
mA
SAR disabled
1
10
µA
AVSSxv − DGND
−1.8
0
V
IOVDD − DGND
1.8
3.6
V
IIOVDD
High resolution mode
8
11.3
mA
Low power mode
3
4.4
mA
Power Dissipation6
Internal buffers bypassed, internal
reference disabled, internal
oscillator disabled, SAR disabled
High Resolution Mode
32 kSPS
117
136
mW
Low Power Mode
8 kSPS
38
44
mW
Power-Down
All ADCs disabled
530
μW
1
AVSSx refers to the following pins: AVSS1A, AVSS1B, AVSS2A, AVSS2B, AVSS3, and AVSS4. This term is used throughout the data sheet.
2
At temperatures higher than 105°C, the device can be operated normally, though slight degradation on the maximum/minimum specifications is expected because
these specifications are only guaranteed up to 105°C. See the Typical Performance Characteristics section for plots showing the typical performance of the device at
high temperatures.
3
The SDO pin and the DOUTx pin are configured in the default mode of strength.
4
AVDD1x = 3.3 V, AVSSx = GND = ground, IOVDD = 1.8 V, CMOS clock.
5
Disabling either the VCM pin or the internal reference results in a 40 µA typical current consumption reduction.
6
Power dissipation is calculated using the maximum supply voltage, 3.6 V.


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