MCP3421DM-BFG Microchip Technology, MCP3421DM-BFG Datasheet - Page 10

• Manufacturer Part Number: MCP3421DM-BFG
• Description: BOARD DEMO FOR MCP3421
• Manufacturer: Microchip Technology

Specifications of MCP3421DM-BFG

• Main Purpose: Power Management, Battery Gauge
• Utilized Ic / Part: MCP3421
• Processor To Be Evaluated: MCP3421
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP3421
5.0
5.1
The user operates the device by setting up the device
configuration register and reads the conversion data
using serial I
operates in two modes: (a) Continuous Conversion
Mode or (b) One-Shot Conversion Mode (single
conversion). The selection is made by setting the O/C
bit in the Configuration Register. Refer to Section 5.2
“Configuration Register” for more information.
5.1.1
The
Conversion if the O/C bit is set to logic “high”. Once the
conversion is completed, the result is placed at the
output data register. The device immediately begins
another conversion and overwrites the output data
register with the most recent data.
The device also clears the data ready flag (RDY bit = 0)
when the conversion is completed. The device sets the
ready flag bit (RDY bit = 1), if the latest conversion
result has been read by the Master.
DS22003D-page 10
MCP3421
USING THE MCP3421 DEVICE
Operating Modes
CONTINUOUS CONVERSION
MODE (O/C BIT =
2
C interface commands. The MCP3421
device
performs
1
)
a
Continuous
5.1.2
Once the One-Shot Conversion (single conversion)
Mode is selected, the device performs a conversion,
updates the Output Data register, clears the data ready
flag (RDY = 0), and then enters a low power standby
mode. A new One-Shot Conversion is started again
when the device receives a new write command with
RDY = 1.
This One-Shot Conversion Mode is recommended for
low power operating applications. During the low
current standby mode, the device consumes less than
1 µA typical. For example, if user collects 18 bit
conversion data once a second in One-Shot Conver-
sion mode, the device draws only about one fourth of
its total operating current. In this example, the device
consumes approximately 39 µA (= ~145 µA/3.75 SPS),
if the device performs only one conversion per second
(1 SPS) in 18-bit conversion mode with 3V power
supply.
ONE-SHOT CONVERSION MODE
(O/C BIT =
© 2007 Microchip Technology Inc.
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