© 2005 Microchip Technology Inc.

DS21948C-page 3

MCP3905/06

TEMPERATURE CHARACTERISTICS

Reference Input

Input Range

2.2

—

2.6

V

Input Impedance

3.2

—

—

k

Ω

Input Capacitance

—

—

10

pF

Analog Inputs

Maximum Signal Level

—

—

±1

V

Differential Input Voltage

Range Channel 0

—

—

±470/G

mV

G = PGA Gain on Channel 0

Differential Input Voltage

Range Channel 1

——

±660

mV

Input Impedance

390

—

—

k

Ω

Proportional to 1/MCLK frequency

Bandwidth

(Notch Frequency)

—

14

—

kHz

Proportional to MCLK frequency,

MCLK/256

Oscillator Input

Frequency Range

MCLK

1

—

4

MHz

Power Specifications

Operating Voltage

4.5

—

5.5

V

—2.7

3.0

mA

—1.2

2.0

mA

Parameters

Sym

Min

Typ

Max

Units

Conditions

Temperature Ranges

Specified Temperature Range

-40

—

+85

°C

Operating Temperature Range

-40

—

+125

°C

Note

Storage Temperature Range

-65

—

+150

°C

Note:

The MCP3905/06 operate over this extended temperature range, but with reduced performance. In any

ELECTRICAL CHARACTERISTICS (CONTINUED)

Parameter

Sym

Min

Typ.

Max

Units

Comment

Note 1:

Measurement error = (Energy Measured By Device - True Energy)/True Energy * 100%. Accuracy is

See Section 2.0 “Typical Performance Curves” for higher frequencies and increased dynamic range.

2:

measured output frequency and expected transfer function.

3:

4:

Error applies down to 60° lead (PF = 0.5 capacitive) and 60° lag (PF = 0.5 inductive).

5:

Refer to Section 4.0 “Device Overview” for complete description.

6:

Specified by characterization, not production tested.

7:

1 MCLK period at 3.58 MHz is equivalent to less than <0.005 degrees at 50 or 60 Hz.

8:

Gain error match is measured from CH0 G = 1 to any other gain setting.