MCP3910 datasheet(3/90 Pages) MICROCHIP

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DS20005116D-page 3

MCP3910

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

Maximum 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 indicated 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

Electrical Specifications:

Unless otherwise indicated, all parameters apply at AVDD = DVDD = 3V, MCLK = 4 MHz;

PRE[1:0] = 00; OSR = 256; GAIN = 1; VREFEXT = 0, CLKEXT = 1, DITHER[1:0] = 11; BOOST[1:0] = 10, VCM =0V;

TA = -40°C to +125°C (Note 1); VIN =1.2 VPP = -0.5 dBFS @ 50/60 Hz on all channels.

Characteristic

Sym.

Min.

Typ.

Max.

Units

Conditions

ADC Performance

Resolution

(No Missing Codes)

—

bits

OSR = 256 or greater

Sampling Frequency

fS(DMCLK)

—

MHz

For maximum condition,

BOOST[1:0] = 11

Output Data Rate

fD(DRCLK)

—

125

ksps

For maximum condition,

BOOST[1:0] = 11, OSR = 32

Analog Input Absolute

Voltage on CHn+/-,

n Between 0 and 1 Pins

CHn+/-

-1

—

All analog input channels

measured to AGND

Analog Input

Leakage Current

IIN

—

±1

—

RESET[1:0] = 11,

MCLK running continuously

Differential Input

Voltage Range

(CHn+–CHn-) -600/GAIN

—

+600/GAIN

VREF =1.2V,

proportional to VREF

Offset Error

VOS

-2

0.2

Note 5

Offset Error Drift

—

0.5

—

µV/°C

Note 1:

All specifications are valid down to -45°C operation.

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 =1.2 VPP = 424 mVRMS, VREF = 1.2V @ 50/60 Hz. See Section 4.0 “Terminology and

Formulas”

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

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 Section 2.0 “Typical

Performance Curves”

for typical performance.

Outside this range, the ADC accuracy is not specified. An extended input range of ±2V can be applied

continuously to the part with no damage.

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

frequency, defined in Table 5-2, as a function of the BOOST and PGA setting chosen. MCLK can take larger

values as long as the prescaler settings (PRE[1:0]) limit AMCLK = MCLK/PRESCALE within the defined

range in Table 5-2.

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