MCP3909(2006) Ver la hoja de datos (PDF) - Microchip Technology

Número de pieza

componentes Descripción

Fabricante

MCP3909
(Rev.:2006)

Energy Metering IC with SPI Interface and Active Power Pulse Output

Microchip Technology 

MCP3909

TIMING CHARACTERISTICS (CONTINUED)

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

AGND, DGND = 0V, MCLK = 3.58 MHz; TA = -40°C to +85°C.

Parameter

Sym

Min

Typ

Max Units

Comment

SDO Rise Time

tR

—

2

—

ns

SDO Fall Time

tF

—

2

—

ns

Note 1:

2:

3:

If output pulse period (tFP) falls below 984376*2 MCLK periods, then tFW = 1/2 tFP.

If output pulse period (tHP) falls below 322160*2 MCLK periods, then tHW = 1/2 tHP. When F2, F1, F0

equals 0,1,1, the HFOUT pulse time is fixed at 64 x MCLK periods or 18 µs for MCLK = 3.58 MHz

Specified by characterization, not production tested.

4: Serial timings specified and production tested with 180 pF load.

FOUT0

FOUT1

tFW

tFS2

tFP

tFS

HFOUT

tHW

tHP

NEG

FIGURE 1-1:

Output Timings for Active Power Pulse Outputs and Negative Power Pin.

CS

CLK

SDI

SDO

tSUCS

tSU tHD

tDO

Hi-z

tCLK

tR

tF

tHI tLO

tDIS

FIGURE 1-2:

Serial Interface Timings showing Output, Rise, Hold, and CS Times.

DS22025A-page 6

© 2006 Microchip Technology Inc.

Share Link: