AD7770_17 Datasheet, PDF (10/98 Pages) Analog Devices – 8-Channel, 24-Bit, Simultaneous Sampling ADC

Data Sheet
AD7770
Parameter
POWER SUPPLIES
AVDD1x − AVSSx
IAVDD1x4, ⁵
AVDD2x − AVSSx
IAVDD2x
AVDD4 − AVSSx
IAVDD4
AVSSxv − DGND
IOVDD − DGND
IIOVDD
Power Dissipation⁶
High Resolution Mode
Low Power Mode
Power-Down
Test Conditions/Comments
Min
Typ
All Σ-Δ channels enabled
3.0
Reference buffer pre-Q, VCM
enabled, internal reference
enabled
High resolution mode
18.5
Low power mode
5
Reference buffer enabled, VCM
enabled, internal reference
enabled
High resolution mode
20.5
Low power mode
5.5
Reference buffer disabled, VCM
disabled, internal reference
disabled
High resolution mode
14.3
Low power mode
3.9
2.2
High resolution mode
9
Low power mode
3.5
AVDD1x −
0.3
SAR enabled
1.7
SAR disabled
1
−1.8
1.8
High resolution mode
8
Low power mode
3
Internal buffers bypassed, internal
reference disabled, internal
oscillator disabled, SAR disabled
32 kSPS
117
8 kSPS
38
All ADCs disabled
530
Max
Unit
3.6
V
23.7
mA
6.4
mA
26.7
mA
7.1
mA
18.8
mA
5.1
mA
3.6
V
9.45
mA
3.7
mA
AVDD1x
V
2
mA
10
µA
0
V
3.6
V
11.3
mA
4.4
mA
136
mW
44
mW
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.}
Rev. C | Page 9 of 97