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MCP3422A3-E/ST

18-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter with I2C™ Interface and On-Board Reference

Microchip Technology 

MCP3422/3/4

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

PGA Gain Error Match (Note 6)

—

0.1

—

% Between any 2 PGA settings

Gain Error Drift (Note 6)

—

15

—

ppm/°C PGA=1, DR=3.75 SPS

Offset Error

VOS

—

15

55

µV Tested at PGA = 1

DR = 3.75 SPS

Offset Drift vs. Temperature

—

50

—

nV/°C

Common-Mode Rejection

—

105

—

dB at DC and PGA =1,

Gain vs. VDD

—

110

—

5

—

dB at DC and PGA =8, TA = +25°C

—

ppm/V TA = +25°C, VDD = 2.7V to 5.5V,

PGA = 1

Power Supply Rejection at DC

Input

—

100

—

dB TA = +25°C, VDD = 2.7V to 5.5V,

PGA = 1

Power Requirements

Voltage Range

Supply Current during

Conversion

VDD

2.7

—

IDDA

—

145

—

135

Supply Current during Standby

IDDS

—

0.3

Mode

I2C Digital Inputs and Digital Outputs

5.5

V

180

µA VDD = 5.0V

—

µA VDD = 3.0V

1

µA VDD = 5.0V

High level input voltage

VIH

0.7VDD

—

Low level input voltage

VIL

—

—

Low level output voltage

VOL

—

—

Hysteresis of Schmidt Trigger

VHYST 0.05VDD

—

for inputs (Note 7)

Supply Current when I2C bus

IDDB

—

—

line is active

VDD

0.3VDD

0.4

—

10

V at SDA and SCL pins

V at SDA and SCL pins

V

IOL = 3 mA

V

fSCL = 100 kHz

µA Device is in standby mode while

I2C bus is active

Input Leakage Current

IILH

—

—

IILL

-1

—

Logic Status of I2C Address Pins (Note 8)

1

µA VIH = 5.5V

—

µA VIL = GND

Adr0 and Adr1 Pins

Adr0 and Adr1 Pins

Adr0 and Adr1 Pins

Addr_Low VSS

—

Addr_High 0.75VDD

—

Addr_Float 0.35VDD

—

0.2VDD

VDD

0.6VDD

V The device reads logic low.

V The device reads logic high.

V Read pin voltage if voltage is

applied to the address pin.

(Note 9)

—

VDD/2

—

Pin Capacitance and I2C Bus Capacitance

Device outputs float output

voltage (VDD/2) on the address

pin, if left “floating”. (Note 10)

Pin capacitance

I2C Bus Capacitance

CPIN

—

4

Cb

—

—

10

pF

400

pF

Note 1: 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.

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

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

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

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

6: Includes all errors from on-board PGA and VREF.

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

8: MCP3423 and MCP3424 only.

9: Addr_Float voltage is applied at address pin.

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

DS22088C-page 6

© 2009 Microchip Technology Inc.

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