MCP3422A3-E/ST Ver la hoja de datos (PDF) - Microchip Technology

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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

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 ................ ≥ 6 kV HBM, ≥ 400V MM

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

ELECTRICAL CHARACTERISTICS

†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 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

—

V

VIN = [CHn+ - CHn-]

Maximum Input Voltage Range

Differential Input Impedance

ZIND (f)

VSS-0.3

—

—

2.25/PGA

VDD+0.3

—

V (Note 1)

MΩ During normal mode operation

(Note 2)

Common Mode input

Impedance

ZINC (f)

—

25

—

MΩ PGA = 1, 2, 4, 8

System Performance

Resolution and No Missing

Codes

(Effective Number of Bits)

(Note 3)

12

—

14

—

16

—

18

—

—

Bits DR = 240 SPS

—

Bits DR = 60 SPS

—

Bits DR = 15 SPS

—

Bits DR = 3.75 SPS

Data Rate

(Note 4)

DR

176

240

44

60

328

SPS 12 bits mode

82

SPS 14 bits mode

11

15

20.5

SPS 16 bits mode

2.75

3.75

5.1

SPS 18 bits mode

Output Noise

Integral Non-Linearity

—

1.5

INL

—

10

—

µVRMS TA = +25°C, DR = 3.75 SPS,

PGA = 1, VIN+ = VIN- = GND

35

ppm of DR = 3.75 SPS, FSR = Full

FSR Scale Range (Note 5)

Internal Reference Voltage

Gain Error (Note 6)

VREF

—

—

2.048

0.05

—

0.35

V

% PGA = 1, DR = 3.75 SPS

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”).

© 2009 Microchip Technology Inc.

DS22088C-page 5

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