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MCP3909T

Energy Metering IC with SPI Interface and Active Power Pulse Output

Microchip Technology 

MCP3909

TEMPERATURE CHARACTERISTICS

Electrical Specifications: Unless otherwise indicated, VDD = 4.5V to 5.5V, AGND, DGND = 0V.

Parameters

Sym Min Typ Max Units

Conditions

Temperature Ranges

Specified Temperature Range

TA

Operating Temperature Range

TA

Storage Temperature Range

TA

Thermal Package Resistances

-40 — +85

-40 — +125

-65 — +150

°C

°C Note

°C

Thermal Resistance, 24L-SSOP JA

— 73

—

°C/W

Note: The MCP3909 operates over this extended temperature range, but with reduced performance. In any case,

the Junction Temperature (TJ) must not exceed the Absolute Maximum specification of +150°C.

TIMING CHARACTERISTICS

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

Frequency Outputs

FOUT0 and FOUT1 Pulse Width

tFW

—

275

—

ms 984376 MCLK periods

(Logic Low)

(Note 1)

HFOUT Pulse Width

tHW

—

90

—

ms 322160 MCLK periods

(Note 2)

FOUT0 and FOUT1 Pulse Period

tFP

Refer to Equation 4-1

s

HFOUT Pulse Period

tHP

Refer to Equation 4-2

s

FOUT0 to FOUT1 Falling-Edge

tFS2

—

0.5 tFP

—

Time

FOUT0 to FOUT1 Minimum Sepa-

tFS

ration

—

4/MCLK

—

Digital I/O

FOUT0 and FOUT1 Output High

VOH

4.5

—

—

V IOH = 10 mA, DVDD = 5.0V

Voltage

FOUT0 and FOUT1 Output Low

VOL

—

Voltage

—

0.5

V IOL = 10 mA, DVDD = 5.0V

HFOUT and NEG Output High

VOH

4.0

—

—

V IOH = 5 mA, DVDD = 5.0V

Voltage

HFOUT and NEG Output Low

VOL

—

Voltage

—

0.5

V IOL = 5 mA, DVDD = 5.0V

High-Level Input Voltage

(All Digital Input Pins)

VIH

2.4

—

—

V DVDD = 5.0V

Low Level Input Voltage

(All Digital Input Pins)

VIL

—

—

0.85

V DVDD = 5.0V

Input Leakage Current

Pin Capacitance

—

0.1

±1

µA VIN = 0, VIN = DVDD

—

—

10

pF (Note 3)

Note 1:

2:

3:

4:

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.

Serial timings specified and production tested with 180 pF load.

 2006-2012 Microchip Technology Inc.

DS22025C-page 5

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