MCP3421EV Microchip Technology, MCP3421EV Datasheet - Page 16

• 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
5.2
The device has an 8-bit wide configuration register to
select for: input channel, conversion mode, conversion
rate, and PGA gain. This register allows the user to
change the operating condition of the device and check
the status of the device operation.
REGISTER 5-1:
DS22003E-page 16
bit 7
* Default Configuration after Power-On Reset
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-5
bit 4
bit 3-2
bit 1-0
R/W-1
RDY
1 *
Configuration Register
RDY: Ready Bit
This bit is the data ready flag. In read mode, this bit indicates if the output register has been updated
with a latest conversion result. In One-Shot Conversion mode, writing this bit to “1” initiates a new
conversion.
Reading RDY bit with the read command:
1 = Output register has not been updated.
0 = Output register has been updated with the latest conversion result.
Writing RDY bit with the write command:
Continuous Conversion mode: No effect
One-Shot Conversion mode:
1 = Initiate a new conversion.
0 = No effect.
C1-C0: These bits are not effected for the MCP3421.
O/C: Conversion Mode Bit
1 = Continuous Conversion Mode (Default). The device performs data conversions continuously.
0 = One-Shot Conversion Mode. The device performs a single conversion and enters a low power
S1-S0: Sample Rate Selection Bit
00 =
01 =
10 =
11 =
G1-G0: PGA Gain Selection Bits
00 =
01 =
10 =
11 =
R/W-0
standby mode until it receives another write or read command.
C1
0 *
CONFIGURATION REGISTER
240 SPS (12 bits) (Default)
60 SPS (14 bits)
15 SPS (16 bits)
3.75 SPS (18 bits)
x1 (Default)
x2
x4
x8
W = Writable bit
‘1’ = Bit is set
R/W-0
C0
0 *
R/W-1
O/C
1 *
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
The user can rewrite the configuration byte any time
during the device operation. Register 5-1 shows the
configuration register bits.
0 *
S1
R/W-0
S0
0 *
© 2009 Microchip Technology Inc.
x = Bit is unknown
R/W-0
G1
0 *
R/W-0
G0
0 *
bit 0