ADAU1977

Data Sheet

Rev. C | Page 6 of 68

DIGITAL INPUT/OUTPUT SPECIFICATIONS

Table 3.

Parameter

Test Conditions/Comments

Min

Max

Unit

INPUT

0.7 × IOVDD

V

0.3 × IOVDD

V

Input Leakage Current

±10

µA

Input Capacitance

5

pF

OUTPUT

IOVDD − 0.60

V

0.4

V

POWER SUPPLY SPECIFICATIONS

Table 4.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

DVDD

On-chip LDO

1.62

1.8

1.98

V

AVDDx

3.0

3.3

3.6

V

IOVDD

1.62

3.3

3.6

V

VBAT1

14.4

18

V

IOVDD Current

Normal Operation

450

µA

880

µA

1.75

mA

Power-Down

20

µA

AVDDx Current

Normal Operation

Boost off, 4-channel ADC, DVDD internal

14

mA

Boost on, 4-channel ADC, DVDD internal

14.5

mA

Boost off, 4-channel ADC, DVDD external

9.6

mA

Boost on, 4-channel ADC, DVDD external

10.1

mA

Power-Down

270

µA

Boost Converter Current

Normal Operation

Boost on, 4-channel ADC, MICBIAS = 8.5 V, no load

34

mA

Boost on, 4-channel ADC, MICBIAS = 8.5 V, 42 mA

168

mA

Power-Down

180

µA

DVDD Current

Normal Operation

DVDD external = 1.8 V

4.5

mA

Power-Down

65

µA

VBAT Current

VBAT = 14.4 V

Normal Operation

575

625

µA

Power-Down

575

625

µA

POWER DISSIPATION

Normal Operation

AVDDx

DVDD internal, MICBIAS = 8.5 V at 42 mA load

265

mW

Power-Down, All Supplies

PD/RST pin held low

9

mW

1

When VBAT ≤ MICBIAS, a short to VBAT cannot be distinguished from a short to MICBIAS, and reporting a short to VBAT fault takes precedence over a short to MICBIAS fault.