MCP39F521 datasheet(5/52 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS20005442A-page 5

MCP39F521

Calibration, Calculation and Event Detection Times

Auto-Calibration Time

tCAL

—

2N x(1/fLINE)

—ms

Note 3

Minimum Time

for Voltage Surge/Sag

Detection

tAC_SASU

—

see

Section 7.0

—ms

Note 4

24-Bit Delta-Sigma ADC Performance

Analog Input

Absolute Voltage

VIN

-1

—

Analog Input

Leakage Current

AIN

—1

—

Differential Input

Voltage Range

(I1+ – I1-),

(V1+ – V1-)

-600/GAIN

—

+600/GAIN

VREF = 1.2V,

proportional to VREF

Offset Error

VOS

-1

—

Offset Error Drift

—

0.5

—

µV/°C

Gain Error

-4

—

Note 5

Gain Error Drift

—

ppm/°C

Differential Input

Impedance

ZIN

232

—



G= 1

142

—



G= 2

—



G= 4

—



G= 8

—



G= 16

—



G= 32

Signal-to-Noise

and Distortion Ratio

SINAD

94.5

—

Note 6

Total Harmonic Distortion

THD

—

-106.5

-103

dBc

Note 6

Signal-to-Noise Ratio

SNR

—

Note 6

Spurious Free

Dynamic Range

SFDR

—

111

—

Note 6

Crosstalk

CTALK

—

-122

—

AC Power

Supply Rejection Ratio

AC PSRR

—

-73

—

AVDD and

DVDD =3.3V + 0.6VPP,

100 Hz, 120 Hz, 1 kHz

DC Power

Supply Rejection Ratio

DC PSRR

—

-73

—

AVDD and DVDD = 3 to

3.6V

DC Common

Mode Rejection Ratio

DC CMRR

—

-105

—

VCM varies

from -1V to +1V

TABLE 1-1:

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications:

Unless otherwise indicated, all parameters apply at AVDD, DVDD = 2.7 to 3.6V, TA = -40°C

to +125°C, MCLK = 4 MHz, PGA GAIN = 1.

Characteristic

Sym.

Min.

Typ.

Max.

Units

Test Conditions

Note 1:

Calculated from reading the register values with no averaging, single computation cycle with accumulation

interval of 4 line cycles.

Specification by design and characterization; not production tested.

N = Value in the Accumulation Interval Parameter register. The default value of this register is 2 or

TCAL = 80 ms for 50 Hz line.

Applies to Voltage Sag and Voltage Surge events only.

Applies to all gains. Offset and gain errors depend on the PGA gain setting. See Section 2.0, Typical

Performance Curves

for typical performance.

VIN =1VPP =353 mVRMS @ 50/60 Hz.

Variation applies to internal clock and I2C only. All calculated output quantities are temperature

compensated to the performance listed in the respective specification.

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