© 2005 Microchip Technology Inc.

DS21950B-page 3

MCP3551/3

Common Mode DC Rejection

—

-135

—

dB

Power Supply DC Rejection

—

-115

—

dB

Common Mode 50/60 Hz Rejection

CMRR

—

-135

—

dB

Power Supply 50/60 Hz Rejection

PSRR

—

-85

—

dB

Normal Mode 50 or 60 Hz

Rejection

NMRR

—

-85

—

dB

MCP3551 only,

Analog Inputs

Differential Input Range

V

Absolute/Common Mode Voltages

—

V

Analog Input Sampling Capacitor

—

10

—

pF

Note 5

Differential Input Impedance

—

2.4

—

M

Ω

Shutdown Mode Leakage Current

—

1

—

nA

(Note 3)

Reference Input

Voltage Range

0.1

—

V

DD

V

Reference Input Sampling

Capacitor

—15

—

pF

Note 5

Reference Input Impedance

—

2.4

—

M

Ω

Note 4

Shutdown Mode Reference

Leakage Current

—1

—

nA

Power Requirements

Power Supply Voltage Range

2.7

—

5.5

V

MCP3551 Supply Current

—

120

170

µA

—

100

—

µA

MCP3553 Supply Current

—

140

185

µA

—

120

—

µA

Supply Current, Sleep Mode

—10

µA

Supply Current, Shutdown Mode

——

1

µA

Serial Interface

Voltage Input High (CS, SCK)

——

V

Voltage Input Low (CS, SCK)

——

0.4

V

—

—

V

——

0.4

V

Input leakage Current

(CS, SCK)

-1

—

1

µA

Internal Pin Capacitance

(CS, SCK, SDO/RDY)

—5

—

pF

Note 1

DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all parameters apply at -40°C

applies to entire MCP3551/3 family.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note

1:

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

2:

INL is the difference between the endpoints line and the measured code at the center of the quantization band.

3:

4:

5:

Characterized by design, but not tested.

6:

Rejection performance depends on internal oscillator accuracy; see Section 4.0 “Device Overview” for more informa-

tion on oscillator and digital filter design. MCP3551 device rejection specifications characterized from 49 to 61 Hz.