MCP3909 Microchip Technology, MCP3909 Datasheet - Page 5

• Manufacturer Part Number: MCP3909
• Description: Energy Metering IC with SPI Interface and Active Power Pulse Output
• Manufacturer: Microchip Technology

© 2006 Microchip Technology Inc.
TIMING CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all parameters apply at AV
A
Frequency Outputs
F
(Logic Low)
HF
F
HF
F
Time
F
ration
Digital I/O
F
Voltage
F
Voltage
HF
Voltage
HF
Voltage
High-Level Input Voltage
(All Digital Input Pins)
Low Level Input Voltage
(All Digital Input Pins)
Input Leakage Current
Pin Capacitance
Serial Interface Timings (Note 4)
Output Data Rate
Serial Clock Frequency
Window for serial mode entry
codes
Window start time for serial
mode entry codes
Serial Clock High Time
Serial Clock Low Time
CS Fall to First Rising CLK Edge
Data Input Setup Time
Data Input Hold Time
CS Rise to Output Disable
CLK Fall to Output Data Valid
Note 1:
OUT0
OUT0
OUT0
OUT0
OUT0
OUT0
GND
OUT
OUT
OUT
OUT
, D
2:
3:
4:
and F
and F
to F
to F
and F
and F
Pulse Width
Pulse Period
and NEG Output High
and NEG Output Low
GND
Parameter
OUT1
OUT1
If output pulse period (t
If output pulse period (t
equals 0,1,1, the HF
Specified by characterization, not production tested.
Serial timings specified and production tested with 180 pF load.
OUT1
OUT1
OUT1
OUT1
= 0V, MCLK = 3.58 MHz; T
Falling-Edge
Minimum Sepa-
Pulse Width
Pulse Period
Output High
Output Low
OUT
FP
HP
t
t
WINDOW
WINSET
pulse time is fixed at 64 x MCLK periods or 18 µs for MCLK = 3.58 MHz
t
f
Sym
) falls below 984376*2 MCLK periods, then t
SUCS
) falls below 322160*2 MCLK periods, then t
t
V
V
f
t
V
V
t
t
V
ADC
t
t
V
t
t
t
t
t
CLK
FS2
t
FW
HW
DIS
HP
SU
HD
DO
FP
FS
LO
OH
OH
OL
OL
HI
IH
IL
A
= -40°C to +85°C.
1/MCLK
Min
4.5
4.5
2.4
10
30
15
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Refer to
Refer to
MCLK/256
4/MCLK
0.5 t
Equation 4-1
Equation 4-2
Typ
275
0.1
90
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
FP
8/MCLK
Max
0.85
150
0.5
0.5
10
20
20
10
30
±1
—
—
—
—
—
—
—
—
—
—
—
40
Units
MHz
FW
HW
ms
ms
µA
pF
ns
ns
ns
ns
ns
ns
ns
—
—
DD
V
V
V
V
V
V
s
s
= 1/2 t
= 1/2 t
= DV
984376 MCLK periods
(Note 1)
322160 MCLK periods
(Note 2)
I
I
I
I
DV
DV
V
(Note 3)
V
Last bit must be clocked in
before this time.
First bit must be clocked in
after this time.
OH
OL
OH
OL
DD
IN
DD
FP
HP
DD
DD
= 12 mA, DV
= 12 mA, DV
.
MCP3909
= 0, V
= 12 mA, DV
= 12 mA, DV
. When F2, F1, F0
= 4.5V to 5.5V,
= 5V
= 5.0V
= 5.0V
Comment
IN
DS22025A-page 5
= DV
DD
DD
DD
DD
DD
= 5.0V
= 5.0V
= 5.0V
= 5.0V