MCP3421

DS22003B-page 2

© 2006 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings†

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

†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

Parameters

Sym

Min

Typ

Max

Units

Conditions

Analog Inputs

Differential Input Range

—

±2.048/PGA

—

V

Common-Mode Voltage Range

(absolute) (Note 1)

—

V

Differential Input Impedance

(Note 2)

—

2.25/PGA

—

M

Ω

During normal mode operation

Common Mode input

Impedance

—

25

—

M

Ω

PGA = 1, 2, 4, 8

System Performance

Resolution and No Missing

Codes (Note 8)

12

—

—

Bits

DR = 240 SPS

14

—

—

Bits

DR = 60 SPS

16

—

—

Bits

DR = 15 SPS

18

—

—

Bits

DR = 3.75 SPS

Data Rate (Note 3)

DR

176

240

328

SPS

S1,S0 = ‘00’, (12 bits mode)

44

60

82

SPS

S1,S0 = ‘01’, (14 bits mode)

11

15

20.5

SPS

S1,S0 = ‘10’, (16 bits mode)

2.75

3.75

5.1

SPS

S1,S0 = ‘11’, (18 bits mode)

Output Noise

—

1.5

—

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:

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

4:

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

5:

6:

Full Scale Range (FSR) = 2 x 2.048/PGA = 4.096/PGA.

7:

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

8:

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