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MCP3901

Two-Channel Analog Front End

Microchip Technology 

MCP3901

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings †

VDD ...................................................................................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 = 333 mVRMS @ 50/60 Hz

Parameters

Symbol

Min Typical Max

Units

Conditions

Internal Voltage Reference

Internal Voltage Reference

Tolerance

Temperature Coefficient

Output Impedance

VREF

-2%

2.37

+2%

V VREFEXT = 0

TCREF

—

12

—

ppm/°C VREFEXT = 0

ZOUTREF

—

7

—

kΩ AVDD = 5V,

VREFEXT = 0

Voltage Reference Input

Input Capacitance

—

—

10

pF

Differential Input Voltage Range

(VREF+ – VREF-)

VREF

2.2

—

2.6

V

VREF = (VREF+ – VREF-),

VREFEXT = 1

Absolute Voltage on REFIN+ Pin

VREF+

1.9

—

2.9

V VREFEXT = 1

Absolute Voltage on REFIN- Pin

VREF-

-0.3

—

0.3

V

ADC Performance

Resolution (No Missing Codes)

24

—

—

bits OSR = 256

(See Table 5-3)

Sampling Frequency

fS

See Table 4-2

kHz fS = DMCLK = MCLK/

(4 x PRESCALE)

Note 1:

2:

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 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.

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

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

VREFEXT = 0, CLKEXT = 0.

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

VREFEXT = 1, CLKEXT = 1.

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

7: 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.

8: 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’.

© 2011 Microchip Technology Inc.

DS22192D-page 3

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