MCP3911 datasheet(3/72 Pages) MICROCHIP

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DS22286A-page 3

MCP3911

1.0

ELECTRICAL

CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS †

DD ..................................................................... -0.3V to 4.0V

Digital inputs and outputs w.r.t. AGND................ --0.3V to 4.0V

Analog input w.r.t. AGND..................................... ....-2V to +2V

VREF input w.r.t. AGND ............................... -0.6V to VDD +0.6V

Storage temperature .....................................-65°C to +150°C

Ambient temp. with power applied ................-65°C to +125°C

Soldering temperature of leads (10 seconds) ............. +300°C

ESD on the analog inputs (HBM,MM) ................. 4.0 kV, 200V

ESD on all other pins (HBM,MM) ........................ 4.0 kV, 200V

† Notice: Stresses above those listed under “Absolute Maxi-

mum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the

device at those or any other conditions, above those indi-

cated in the operational listings of this specification, is not

implied. Exposure to maximum rating conditions for extended

periods may affect device reliability.

1.1

ELECTRICAL SPECIFICATIONS

TABLE 1-1:

ANALOG SPECIFICATIONS TARGET TABLE

Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 2.7V to 3.6V, MCLK =

4 MHz; PRE<1:0> = 00; OSR = 256; GAIN = 1; VREFEXT=0, CLKEXT=1, AZ_FREQ=0, DITHER<1:0>=11,

BOOST<1:0> = 10; VCM=0V; TA = -40°C to +125°C; VIN = 1.2 VPP = 424 mVRMS @ 50/60 Hz on both channels.

Sym

Characteristic

Min

Typ

Max

Units

Test Conditions

ADC Performance

Resolution (No Missing

Codes)

bits

OSR = 256 or greater

fS(DMCLK)

Sampling Frequency

MHz

For maximum condi-

tion, BOOST<1:0> = 11

fD(DRCLK)

Output Data Rate

125

ksps

For maximum condi-

tion, BOOST<1:0> = 11,

OSR = 32

CH0+/-

Analog Input Absolute Voltage

on CH0+, CH0-, CH1+, CH1-

pins

-1

All analog input

channels, measured to

AGND

IIN

Analog Input Leakage Current

+/-1

RESET<1:0>=11, MCLK

running continuously

(CHn+-CHn-) Differential Input Voltage

Range

-600/GAIN

+600/ GAIN

VREF=1.2V,

proportional to VREF

VOS

Offset Error

-1

0.2

(Note 4)

Offset Error Drift

0.5

µV/°C

Gain Error

-4

(Note 4)

Note 1:

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

instability across this input range. Dynamic Performance specified at -0.5 dB below the maximum signal range, VIN =

1.2VPP = 424 mVRMS, VREF = 1.2V @ 50/60 Hz. See terminology section for definition. This parameter is established

by characterization and not 100% tested. See performance graphs for other than default settings provided here.

For these operating currents the following configuration 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 and gain errors depend on PGA gain setting, see typical performance curves for typical per-

formance.

Outside of this range, ADC accuracy is not specified. An extended input range of +/-2 V can be applied continuously to

the part with no damage.

For proper operation, and for optimizing ADC accuracy, AMCLK should be limited to the maximum frequency defined in

the Table 5-2 as a function of the BOOST and PGA setting chosen. MCLK can take larger values as long as the pres-

caler settings (PRE<1:0>) limit AMCLK=MCLK/PRESCALE in the defined range in the Table 5-2.

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