MCP3901 datasheet(3/60 Pages) MICROCHIP

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DS22192C-page 3

MCP3901

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

DD ................................................................................... 7.0V

Digital inputs and outputs w.r.t. AGND........ -0.6V to VDD +0.6V

Analog input w.r.t. AGND..................................... ....-6V to +6V

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) ................. 7.0 kV, 400V

ESD on all other pins (HBM,MM) ........................ 7.0 kV, 400V

† 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 indi-

cated in the operational listings of this specification, is not

implied. Exposure to maximum rating conditions for extended

periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

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

Internal Voltage Reference

Tolerance

VREF

-2%

2.37

+2%

VREFEXT = 0

Temperature Coefficient

TCREF

—

ppm/°C

VREFEXT = 0

Output Impedance

ZOUTREF

—7

—

AVDD = 5V,

VREFEXT = 0

Voltage Reference Input

Input Capacitance

—

Differential Input Voltage Range

(VREF+ – VREF-)

VREF

2.2

—

2.6

VREF = (VREF+ – VREF-),

VREFEXT = 1

Absolute Voltage on REFIN+ Pin

VREF+

1.9

—

2.9

VREFEXT = 1

Absolute Voltage on REFIN- Pin

VREF-

-0.3

—

0.3

ADC Performance

Resolution (No Missing Codes)

—

bits

OSR = 256

(See Table 5-3)

Sampling Frequency

See Table 4-2

kHz

fS = DMCLK = MCLK/

(4 x PRESCALE)

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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