MCP3422 datasheet(5/58 Pages) MICROCHIP

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DS22088C-page 5

MCP3422/3/4

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

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

All inputs and outputs ............. ..........VSS –0.4V to VDD+0.4V

Differential Input Voltage ...................................... |VDD - VSS|

Output Short Circuit Current ................................ Continuous

Current at Input Pins ....................................................±2 mA

Current at Output and Supply Pins ............................±10 mA

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

Ambient Temp. with power applied ...............-55°C to +125°C

ESD protection on all pins

................ ≥ 6kV HBM, ≥ 400V MM

Maximum Junction Temperature (TJ). .........................+150°C

†Notice: Stresses above those listed under “Maximum Rat-

ings” 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

ELECTRICAL CHARACTERISTICS

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

Analog Inputs

Differential Full Scale Input

Voltage Range

FSR

—

±2.048/PGA

—

VIN = [CHn+ - CHn-]

Maximum Input Voltage Range

VSS-0.3

—

VDD+0.3

(Note 1)

Differential Input Impedance

ZIND (f)

—

2.25/PGA

—

During normal mode operation

(Note 2)

Common Mode input

Impedance

ZINC (f)

—

PGA = 1, 2, 4, 8

System Performance

Resolution and No Missing

Codes

(Effective Number of Bits)

(Note 3)

—

Bits

DR = 240 SPS

—

Bits

DR = 60 SPS

—

Bits

DR = 15 SPS

—

Bits

DR = 3.75 SPS

Data Rate

(Note 4)

176

240

328

SPS

12 bits mode

SPS

14 bits mode

20.5

SPS

16 bits mode

2.75

3.75

5.1

SPS

18 bits mode

Output Noise

—

1.5

—

µVRMS

TA = +25°C, DR = 3.75 SPS,

PGA = 1, VIN+ = VIN- = GND

Integral Non-Linearity

INL

—

ppm of

FSR

DR = 3.75 SPS, FSR = Full

Scale Range (Note 5)

Internal Reference Voltage

VREF

—2.048

—

Gain Error (Note 6)

—

0.05

0.35

PGA = 1, DR = 3.75 SPS

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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