MCP3421EV Microchip Technology, MCP3421EV Datasheet - Page 18

• Manufacturer Part Number: MCP3421EV
• Description: BOARD EVAL FOR MCP3421 SOT23-6
• Manufacturer: Microchip Technology

Specifications of MCP3421EV

• Design Resources: MCP3421EV Gerber Files
• Number Of Adc's: 1
• Number Of Bits: 18
• Sampling Rate (per Second): 4
• Data Interface: Serial
• Inputs Per Adc: 1 Single Ended
• Input Range: ±2.5 V
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: MCP3421
• Silicon Manufacturer: Microchip
• Application Sub Type: ADC
• Kit Application Type: Data Converter
• Silicon Core Number: MCP3421
• Kit Contents: Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Not applicable / Not applicable

MCP3421
FIGURE 5-1:
FIGURE 5-2:
DS22003E-page 18
Note 1:
SCL
SDA
Start Bit by
Start bit
Master
Note:
1
Specified by the customer and programmed at
the factory. If not specified by the customer,
programmed to ‘
Device Code
1
– Stop bit can be issued any time during writing.
– MCP3421 device code is 1101.
– Address Bits A2- A0 = 000 are programmed at factory unless customer requests different codes.
0
1
1
Address
Address Byte
Address
MCP3421 Address Byte.
Timing Diagram For Writing To The MCP3421.
1
MCP3421 Address Byte
1
000
with Write command
X
0
’.
Address Bits
Read/Write bit
1st Byte:
1
X
Acknowledge bit
A2 A1 A0
X
R/W ACK
R/W
(Note 1)
MCP3421
ACK by
9
1
C1 C0
5.3.2
When the Master sends an address byte with the R/W
bit low (R/W = 0), the MCP3421 expects one
configuration byte following the address. Any byte sent
after this second byte will be ignored. The user can
change the operating mode of the device by writing the
configuration register bits.
If the device receives a write command with a new
configuration setting, the device immediately begins a
new conversion and updates the conversion data.
RDY
Configuration Byte
O/C
2nd Byte:
WRITING A CONFIGURATION BYTE
TO THE DEVICE
S1 S0 G1 G0
MCP3421
ACK by
© 2009 Microchip Technology Inc.
9
Stop Bit by
Master