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MCP3903

Six Channel Delta Sigma A/D Converter

Microchip Technology 

MCP3903

1.2 SERIAL INTERFACE CHARACTERISTICS

SERIAL INTERFACE SPECIFICATIONS

Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = 4.5 to 5.5V,

DVDD = 2.7 to 3.6V, -40°C < TA <+125°C, CLOAD = 30 pF.

Parameters

Sym Min Typ Max Units

Conditions

Serial Clock frequency

fSCK

—

—

10

MHz 2.7 ≤ DVDD < 3.6

CS setup time

tCSS

50

—

—

ns 2.7 ≤ DVDD < 3.6

CS hold time

tCSH

100

—

—

ns 2.7 ≤ DVDD < 3.6

CS disable time

tCSD

50

—

—

ns —

Data setup time

tSU

10

—

—

ns 2.7 ≤ DVDD < 3.6

Data hold time

tHD

20

—

—

ns 2.7 ≤ DVDD < 3.6

Serial Clock high time

tHI

40

—

—

ns 2.7 ≤ DVDD < 3.6

Serial Clock low time

tLO

40

—

—

ns 2.7 ≤ DVDD < 3.6

Serial Clock delay time

tCLD

50

—

—

ns —

Serial Clock enable time

tCLE

50

—

—

ns —

Output valid from SCK low

tDO

—

—

50

ns 2.7 ≤ DVDD < 3.6

Output hold time

tHO

0

—

—

ns

Output disable time

tDIS

—

—

50

ns 2.7 ≤ DVDD < 3.6

Reset Pulse Width (RESET)

tMCLR 100

—

—

ns 2.7 ≤ DVDD < 3.6

Data Transfer Time to DR (Data Ready) tDODR

—

50

ns 2.7 ≤ DVDD < 3.6

Data Ready Pulse Low Time

tDRP

1/

—

DMCLK

µs 2.7 ≤ DVDD < 3.6

Schmitt Trigger High-level Input voltage VIH1 .7 DVDD — DVDD +1 V

(All digital inputs)

Schmitt Trigger Low-level input voltage VIL1

-0.3

—

0.25

V

(All digital inputs)

DVDD

Hysteresis of Schmitt Trigger Inputs

VHYS

50

—

mV

(All digital inputs)

Low-level output voltage, SDO pin

VOL

—

—

0.4

Low-level output voltage, DRn pins

VOL

0.4

High-level output voltage, SDO pin

VOH DVDD - —

—

0.5

High-level output voltage, DRn pins

VOH DVDD - —

—

only

0.5

Input leakage current

ILI

—

—

±1

Output leakage current

ILO

—

—

±1

Internal capacitance (all inputs and

CINT

—

—

7

outputs)

Note 1: This parameter is periodically sampled and not 100% tested.

V SDO pin only, IOL = 2 mA,

DVDD = 3.3V

V DRn pins only,

IOL = +1.5 mA, DVDD =3.3V

V SDO pin only,

IOH = -2 mA, DVDD = 3.3V

V DRn pins only,

IOH = -1.5 mA, DVDD=3.3V

µA CS = DVDD, Inputs tied to

DVDD OR DGND

µA CS = DVDD, Inputs tied to

DVDD OR DGND

pF TA = 25°C, SCK = 1.0 MHz

DVDD = 3.3V (Note 1)

DS25048B-page 6

© 2011 Microchip Technology Inc.

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