MCP3903-I/SS Microchip Technology, MCP3903-I/SS Datasheet - Page 31

• Manufacturer Part Number: MCP3903-I/SS
• Description: IC AFE 24BIT 64KSPS 28SSOP
• Manufacturer: Microchip Technology
• Series: -r

Specifications of MCP3903-I/SS

• Featured Product: MCP3903 Six Channel ΔΣ A/D Converter
• Number Of Bits: 24
• Number Of Channels: 6
• Power (watts): -
• Voltage - Supply, Analog: 4.5 V ~ 5.5 V
• Voltage - Supply, Digital: 2.7 V ~ 3.6 V
• Package / Case: 28-SSOP (0.209", 5.30mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FIGURE 6-2:
FIGURE 6-3:
6.6
In this SPI mode, the clock idles High. For the
MCP3903, this means that there will be a falling edge
before there is a rising edge.
FIGURE 6-4:
© 2011 Microchip Technology Inc.
Note:
SDO
SDO
SCK
SCK
SDI
SDI
SDO
SCK
CS
CS
SDI
CS
BITS ON THE RISING EDGE
MCU AND MCP3901 LATCH
BITS ON THE RISING EDGE
MCU AND MCP3901 LATCH
SPI MODE 1,1 - Clock Idle High,
Read/Write Examples
DATA TRANSITIONS ON
BITS ON THE RISING EDGE
MCU AND MCP3901 LATCH
THE FALLING EDGE
DATA TRANSITIONS ON
HI-Z
DATA TRANSITIONS ON
THE FALLING EDGE
THE FALLING EDGE
HI-Z
HI-Z
Device Read (SPI MODE 0,0 - Clock Idles Low)
Device Write (SPI Mode 0,0 - Clock Idles Low).
Device Read (SPI Mode 1,1 - Clock Idles High).
1
A6 A5 A4 A3 A2 A1 A0
1
1
A6 A5 A4 A3 A2 A1
A6 A5 A4 A3 A2 A1 A0
HI-Z
HI-Z
A0
R/W
R/W
R/W
(ADDRESS) 24 BIT DATA
D23
D23
(ADDRESS) DATA
(ADDRESS) DATA
22 21
23
22
22 21
21
20 19 18 17
20 19 18
20 19 18
HI-Z
17
16
17
16
D15
D16
.
D15
D07
D8
D7
06
D7
D6 D5 D4 D3 D2 D1
05
D6 D5 D4 D3 D2 D1
04 03 02 01
00
D0
MCP3903
32
D23 (OF ADDRESS + 1 DATA)
32
32
D23 OF (ADDRESS + 1) DATA
D0
DS25048B-page 31
HI-Z
HI-Z
HI-Z