MCP3906AT-E/SS【PDF 3/32 页】IC ENERGY METERING 24SSOP

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MCP3905A/05L/06A

1.0

ELECTRICAL

? Notice: Stresses above those listed under “ Maximum

CHARACTERISTICS

Absolute Maximum Ratings ?

V DD ...................................................................................7.0V

Digital inputs and outputs w.r.t. A GND ........ -0.6V to V DD +0.6V

Ratings ” 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 operation listings of this specification is

not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

Analog input w.r.t. A GND ..................................... ....-6V to +6V

V REF input w.r.t. A GND ............................... -0.6V to V DD +0.6V

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

Ambient temp. with power applied ................-65°C to +125°C

Soldering temperature of leads (10 seconds) ............. +300°C

ESD on the analog inputs (HBM,MM) ................. 5.0 kV, 500V

ESD on all other pins (HBM,MM) ........................ 5.0 kV, 500V

ELECTRICAL CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, all parameters apply at AV DD = DV DD = 4.5V – 5.5V,

Internal V REF , HPF turned on (AC mode), A GND , D GND = 0V, MCLK = 3.58 MHz; T A = -40°C to +85°C.

Parameter

Sym

Min

Typ

Max

Units

Comment

Overall Measurement Accuracy

Energy Measurement Error

E

—

0.1

—

% F OUT Channel 0 swings 1:500 range,

MCP3905A, MCP3905L only

( Note 1 , Note 4 )

—

0.1

—

% F OUT Channel 0 swings 1:1000 range,

MCP3906A only ( Note 1 , Note 4 )

No-Load Threshold/

NLT

—

0.0015

—

% F OUT Disabled when F2, F1, F0 = 0, 1, 1

Minimum Load

Max

( Note 5 , Note 6 )

Phase Delay Between

—

—

1/MCLK

s

HPF = 0 and 1, < 1 MCLK

Channels

( Note 4 , Note 6 , Note 7 )

AC Power Supply Rejection

AC PSRR

—

0.01

—

% F OUT F2, F1, F0 = 0, 1, 1 ( Note 3 )

(output frequency variation)

DC Power Supply Rejection

DC PSRR

—

0.01

—

% F OUT HPF = 1, Gain = 1 ( Note 3 )

(output frequency

variation)

System Gain Error

—

3

10

% F OUT ( Note 2 , Note 5 )

ADC/PGA Specifications

Offset Error

V OS

—

2

5

mV

Referred to Input

Gain Error Match

—

0.5

—

% F OUT ( Note 5 )

Internal Voltage Reference

Voltage

Tolerance

Tempco

—

—

—

2.4

±2

15

—

—

—

V

%

ppm/°C

Note 1:

2:

3:

4:

5:

6:

7:

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

measured with signal (±660 mV) on Channel 1. F OUT0 , F OUT1 pulse outputs. Valid from 45 Hz to 65 Hz.

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

Does not include internal V REF . Gain = 1, CH0 = 470 mVDC, CH1 = 660 mVDC, difference between

measured output frequency and expected transfer function.

Percent of HF OUT output frequency variation; Includes external V REF = 2.5V, CH1 = 100 mVRMS @

50 Hz, CH2 = 100 mVRMS @ 50 Hz, AV DD = 5V + 1V pp @ 100 Hz. DC PSRR: 5V ±500 mV

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

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

Specified by characterization, not production tested.

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

? 2006-2011 Microchip Technology Inc.

DS22011B-page 3

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