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MCP3202

2.7V Dual Channel 12-Bit A/D Converter with SPI Serial Interface

Microchip Technology 

MCP3202

1.0 ELECTRICAL

CHARACTERISTICS

1.1 Maximum Ratings*

VDD......................................................................... 7.0V

All inputs and outputs w.r.t. VSS ...... -0.6V to VDD +0.6V

Storage temperature ..........................-65°C to +150°C

Ambient temp. with power applied .....-65°C to +125°C

ESD protection on all pins (HBM)......................... > 4 kV

*Notice: Stresses above those listed under “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 indicated in the operational listings of this specification is

not implied. Exposure to maximum rating conditions for extended

periods may affect device reliability.

PIN FUNCTION TABLE

Name

VDD/VREF

CH0

CH1

CLK

DIN

DOUT

CS/SHDN

Function

+2.7V to 5.5V Power Supply and

Reference Voltage Input

Channel 0 Analog Input

Channel 1 Analog Input

Serial Clock

Serial Data In

Serial Data Out

Chip Select/Shutdown Input

ELECTRICAL CHARACTERISTICS

All parameters apply at VDD = 5.5V, VSS = 0V, TAMB = -40°C to +85°C, fSAMPLE = 100 ksps and fCLK = 18*fSAMPLE

unless otherwise noted.

Parameter

Sym

Min. Typ. Max. Units

Conditions

Conversion Rate:

Conversion Time

Analog Input Sample Time

tCONV

—

—

12

clock

cycles

tSAMPLE

1.5

clock

cycles

Throughput Rate

DC Accuracy:

fSAMPLE

—

—

100

ksps VDD = VREF = 5V

—

—

50

ksps VDD = VREF = 2.7V

Resolution

12

bits

Integral Nonlinearity

INL

— ±0.75 ±1

LSB MCP3202-B

—

±1

±2

LSB MCP3202-C

Differential Nonlinearity

DNL

—

±0.5

±1

LSB No missing codes over

temperature

Offset Error

— ±1.25 ±3

LSB

Gain Error

— ±1.25 ±5

LSB

Dynamic Performance:

Total Harmonic Distortion

THD

—

-82

—

Signal to Noise and Distortion

SINAD

—

72

—

(SINAD)

dB VIN = 0.1V to 4.9V@1 kHz

dB VIN = 0.1V to 4.9V@1 kHz

Spurious Free Dynamic Range SFDR

—

86

—

Analog Inputs:

dB VIN = 0.1V to 4.9V@1 kHz

Input Voltage Range for CH0 or

CH1 in Single-Ended Mode

VSS

—

VDD

V

Input Voltage Range for IN+ in

IN+

Pseudo-Differential Mode

IN-

— VDD+IN-

See Sections 3.1 and 4.1

Input Voltage Range for IN- in

Pseudo-Differential Mode

IN-

VSS-100 — VSS+100 mV See Sections 3.1 and 4.1

Leakage Current

—

.001

±1

μA

Switch Resistance

RSS

—

1k

—

Ω See Figure 4-1

Note 1: This parameter is established by characterization and not 100% tested.

2: Because the sample cap will eventually lose charge, effective clock rates below 10 kHz can affect linearity

performance, especially at elevated temperatures. See Section 6.2 for more information.

DS21034D-page 2

© 2006 Microchip Technology Inc.

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