Datasheet

AD7765
Rev. A | Page 5 of 32
Parameter Test Conditions/Comments Specification Unit
Normal Power Mode
AI
DD
1 (Modulator) 19 mA typ
AI
DD
2 (General)
5
MCLK = 40 MHz 13 mA typ
AI
DD
3 (Differential Amplifier) AV
DD
3 = 5 V 10 mA typ
AI
DD
4 (Reference Buffer) AV
DD
4 = 5 V 9 mA typ
DI
DD
5
MCLK = 40 MHz 37 mA typ
Low Power Mode
AI
DD
1 (Modulator) 10 mA typ
AI
DD
2 (General)
5
MCLK = 40 MHz 7 mA typ
AI
DD
3 (Differential Amplifier) AV
DD
3 = 5 V 5.5 mA typ
AI
DD
4 (Reference Buffer) AV
DD
4 = 5 V 5 mA typ
DI
DD
5
MCLK = 40 MHz 20 mA typ
POWER DISSIPATION
Normal Power Mode MCLK = 40 MHz, decimate 128× 300 mW typ
371 mW max
Low Power Mode MCLK = 40 MHz, decimate 128× 160 mW typ
215 mW max
Power-Down Mode
6
PWRDWN
1
held logic low
mW typ
1
See Terminology section.
2
SNR specifications in decibels are referred to a full-scale input, FS. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
3
Output data rate (ODR) = [(MCLK/2)]/decimation rate. That is, the maximum ODR for AD7765 = [(40 MHz/2)/128] = 156.25 kHz.
4
Tested with a 400 µA load current.
5
Tested at MCLK = 40 MHz. This current scales linearly with the MCLK frequency applied.
6
Tested at 125°C.