MCP3901 datasheet(5/60 Pages) MICROCHIP

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DS22192C-page 5

MCP3901

AC Power Supply Rejection

AC PSRR

—

-77

—

AVDD and DVDD = 5V +

1VPP @ 50/60 Hz

DC Power Supply Rejection

DC PSRR

—

-77

—

AVDD and DVDD = 4.5 to

5.5V

DC Common-Mode Rejection

Ratio (Note 2)

CMRR

—

-72

—

VCM varies from -1V to

+1V

Oscillator Input

Master Clock Frequency Range

MCLK

—

16.384

MHz

(Note 8)

Power Specifications

Operating Voltage, Analog

AVDD

4.5

—

5.5

Operating Voltage, Digital

DVDD

2.7

3.6

5.5

Operating Current, Analog

(Note 4)

AIDD

—

2.1

2.8

BOOST<1:0> = 00

—

3.8

5.6

BOOST<1:0> = 11

Operating Current, Digital

DIDD

—0.45

0.8

DVDD = 5V,

MCLK = 4 MHz

—

0.25

0.35

DVDD = 2.7V,

MCLK = 4 MHz

—1.2

1.6

DVDD = 5V,

MCLK = 8.192 MHz

Shutdown Current, Analog

IDDS,A

——

µA

AVDD pin only (Note 5)

Shutdown Current, Digital

IDDS,D

——

µA

DVDD pin only (Note 5)

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, AVDD = 4.5 to 5.5V, DVDD = 2.7 to 5.5V; -40°C < TA < +85°C,

MCLK = 4 MHz; PRESCALE = 1; OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5 dBFS = 353 mVRMS @ 50/60 Hz

Parameters

Symbol

Min

Typical

Max

Units

Conditions

Note 1:

This specification implies that the ADC output is valid over this entire differential range and that there is no dis-

tortion or instability across this input range. Dynamic performance is specified at -0.5 dB below the maximum

signal range, VIN = -0.5 dBFS @ 50/60 Hz = 353 mVRMS, VREF = 2.4V.

See terminology section for definition.

This parameter is established by characterization and not 100% tested.

For these operating currents, the following bit settings apply: SHUTDOWN<1:0> = 00, RESET<1:0> = 00,

VREFEXT = 0, CLKEXT = 0.

For these operating currents, the following Configuration bit settings apply: SHUTDOWN<1:0> = 11,

VREFEXT = 1, CLKEXT = 1.

Applies to all gains. Offset error is dependant on PGA gain setting (see Figure 2-19 for typical values).

Outside of this range, the ADC accuracy is not specified. An extended input range of ±6V can be applied

continuously to the part with no risk for damage.

For proper operation and to keep ADC accuracy, AMCLK should always be in the range of 1 to 5 MHz with

BOOST bits off. With BOOST bits on, AMCLK should be in the range of 1 to 8.192 MHz,

AMCLK = MCLK/PRESCALE. When using a crystal, the CLKEXT bit should be equal to ‘0’.

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