MCP3913 datasheet(5/82 Pages) MICROCHIP

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 2013 Microchip Technology Inc.

DS20005227A-page 5

MCP3913

Internal Voltage Reference

Tolerance

VREF

1.176

1.2

1.224

VREFEXT = 0,

TA = +25°C only

Temperature Coefficient

TCVREF

—

ppm/°C TA = -40°C to +125°C,

VREFEXT = 0,

VREFCAL<7:0> = 0x50

Output Impedance

ZOUTVREF

—0.6

—



VREFEXT = 0

Internal Voltage Reference

Operating Current

AIDDVREF

—

µA

VREFEXT = 0,

SHUTDOWN<5:0> = 111111

Voltage Reference Input

Input Capacitance

—

Differential Input Voltage

Range (VREF+ – VREF-)

VREF

1.1

—

1.3

VREFEXT = 1

Absolute Voltage on

REFIN+ pin

VREF+

VREF-

+1.1

—VREF-

+1.3

VREFEXT = 1

Absolute Voltage

REFIN- pin

VREF-

-0.1

—

+0.1

REFIN- should be connected to

AGND when VREFEXT = 0

Master Clock Input

Frequency Range

fMCLK

—

MHz

CLKEXT = 1, (Note 7)

Crystal Oscillator

Operating Frequency

Range

fXTAL

—

MHz

CLKEXT = 0, (Note 7)

Analog Master Clock

AMCLK

—

MHz

(Note 7)

Crystal Oscillator

Operating Current

DIDDXTAL

—

µA

CLKEXT = 0

Power Supply

Operating Voltage, Analog

AVDD

2.7

—

3.6

Operating Voltage, Digital

DVDD

2.7

—

3.6

Operating Current, Analog

(Note 2)

IDD,A

—

4.5

BOOST<1:0> = 00

—

5.4

BOOST<1:0> = 01

—

7.4

BOOST<1:0> = 10

—

12.9

17.5

BOOST<1:0> = 11

TABLE 1-1:

ANALOG SPECIFICATIONS (CONTINUED)

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;VIN = -0.5 dBFS @ 50/60 Hz on all channels.

Characteristic

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1:

Dynamic Performance specified at -0.5 dB below the maximum differential input value,

VIN =1.2 VPP = 424 mVRMS @ 50/60 Hz, VREF = 1.2V. 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<5:0> = 000000

RESET<5:0> = 000000

, VREFEXT = 0, CLKEXT = 0.

For these operating currents, the following configuration bit settings apply: SHUTDOWN<5:0> = 111111

VREFEXT = 1, CLKEXT = 1.

Measured on one channel versus all others channels. The average of crosstalk performance over all channels

(see Figure 2-32 for individual channel performance).

Applies to all gains. Offset and gain errors depend on PGA gain setting, see typical performance curves for typical

performance.

Outside of this range, 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 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 in the defined range in Table 5-2.

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