MCP3422 datasheet(6/58 Pages) MICROCHIP

6 / 58 page

MCP3422/3/4

DS22088C-page 6

PGA Gain Error Match (Note 6)

—

0.1

—

Between any 2 PGA settings

Gain Error Drift (Note 6)

—

ppm/°C

PGA=1, DR=3.75 SPS

Offset Error

VOS

—

µV

Tested at PGA = 1

DR = 3.75 SPS

Offset Drift vs. Temperature

—

nV/°C

Common-Mode Rejection

—

105

—

at DC and PGA =1,

—

110

—

at DC and PGA =8, TA = +25°C

Gain vs. VDD

—

ppm/V

TA = +25°C, VDD = 2.7V to 5.5V,

PGA = 1

Power Supply Rejection at DC

Input

—

100

—

TA = +25°C, VDD = 2.7V to 5.5V,

PGA = 1

Power Requirements

Voltage Range

VDD

2.7

—

5.5

Supply Current during

Conversion

IDDA

—

145

180

µA

VDD = 5.0V

—

135

—

µA

VDD = 3.0V

Supply Current during Standby

Mode

IDDS

—0.3

µA

VDD = 5.0V

I2C Digital Inputs and Digital Outputs

High level input voltage

VIH

0.7VDD

—VDD

at SDA and SCL pins

Low level input voltage

VIL

—

0.3VDD

at SDA and SCL pins

Low level output voltage

VOL

——

0.4

IOL = 3 mA

Hysteresis of Schmidt Trigger

for inputs (Note 7)

VHYST

0.05VDD

——

fSCL = 100 kHz

Supply Current when I2C bus

line is active

IDDB

—

µA

Device is in standby mode while

I2C bus is active

Input Leakage Current

IILH

——

µA

VIH = 5.5V

IILL

-1

—

µA

VIL = GND

Logic Status of I2C Address Pins (Note 8)

Adr0 and Adr1 Pins

Addr_Low

VSS

—0.2VDD

The device reads logic low.

Adr0 and Adr1 Pins

Addr_High

0.75VDD

—VDD

The device reads logic high.

Adr0 and Adr1 Pins

Addr_Float

0.35VDD

—0.6VDD

Read pin voltage if voltage is

applied to the address pin.

(Note 9)

—VDD/2

—

Device outputs float output

voltage (VDD/2) on the address

pin, if left “floating”. (Note 10)

Pin Capacitance and I2C Bus Capacitance

Pin capacitance

CPIN

—4

I2C Bus Capacitance

——

400

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all parameters apply for TA = -40°C to +85°C, VDD = +5.0V, VSS = 0V,

CHn+ = CHn- = VREF/2, VINCOM = VREF /2. All ppm units use 2*VREF as differential full scale range.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note

Any input voltage below or greater than this voltage causes leakage current through the ESD diodes at the input pins.

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

This input impedance is due to 3.2 pF internal input sampling capacitor.

This parameter is ensured by design and not 100% tested.

The total conversion speed includes auto-calibration of offset and gain.

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

Includes all errors from on-board PGA and VREF.

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

MCP3423 and MCP3424 only.

Addr_Float voltage is applied at address pin.

10: No voltage is applied at address pin (left “floating”).

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