MCP3909-ISLASHSS datasheet(3/40 Pages) MICROCHIP

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DS22025A-page 3

MCP3909

ADC/PGA Specifications

Offset Error

VOS

—

Referred to Input, applies to both

channels

Gain Error Match

—

0.5

—

% FOUT (Note 5)

Internal Voltage Reference

Voltage

—

2.4

—

Tolerance

—

±2

—

Tempco

—

ppm/°C

Reference Input

Input Range

2.2

—

2.6

Input Impedance

3.2

—

Input Capacitance

—

Analog Inputs

Maximum Signal Level

—

±1

CH0+,CH0-,CH1+,CH1- to AGND

Differential Input Voltage

Range Channel 0

—

±470/G

G = PGA Gain on Channel 0

Differential Input Voltage

Range Channel 1

——

±660

Input Impedance

390

—

Proportional to 1/MCLK

Oscillator Input

Frequency Range

MCLK

—

MHz

Power Specifications

Operating Voltage

4.5

—

5.5

AVDD, DVDD

IDD,A

—2.3

2.8

AVDD pin only

IDD,D

—0.8

1.2

DVDD pin only

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise indicated, all parameters apply at AVDD = DVDD = 4.5V to 5.5V,

Internal VREF, HPF turned on (AC mode), AGND, DGND = 0V, MCLK = 3.58 MHz; TA = -40°C to +85°C.

Parameter

Sym

Min

Typ.

Max

Units

Comment

Note 1: Measurement error = (Energy Measured By Device - True Energy)/True Energy * 100%. Accuracy is

measured with signal (±660 mV) on Channel 1. FOUT0, FOUT1 pulse outputs. Valid from 45 Hz to 75 Hz.

See typical performance curves for higher frequencies and increased dynamic range.

2: Does not include internal VREF. Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between

measured output frequency and expected transfer function.

3: Percent of HFOUT output frequency variation; Includes external VREF = 2.5V, CH1 = 100 mVRMS @ 50 Hz,

CH2 = 100 mVRMS @ 50 Hz, AVDD = 5V + 1Vpp @ 100 Hz. DC PSRR: 5V ±500 mV

4: Error applies down to 60 degree lead (PF = 0.5 capacitive) and 60 degree 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.

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