Datasheet
Table Of Contents
- FEATURES
- APPLICATIONS
- GENERAL DESCRIPTION
- FUNCTIONAL BLOCK DIAGRAM
- TABLE OF CONTENTS
- REVISION HISTORY
- SPECIFICATIONS
- ABSOLUTE MAXIMUM RATINGS
- PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
- TYPICAL PERFORMANCE CHARACTERISTICS
- ARCHITECTURE AND MAIN FEATURES
- REGISTER DESCRIPTIONS
- SERIAL INTERFACE
- HARDWARE DESIGN CONSIDERATIONS
- OUTLINE DIMENSIONS
AD7150
Rev. 0 | Page 15 of 28
STATUS REGISTER
Address Pointer 0x00
8 Bits, Read-Only, Default Value 0x53 Before Conversion, 0x54 After Conversion
The status register indicates the status of the part. The register can be read via the 2-wire serial interface to query the status of the outputs,
check the CDC finished conversion, and check whether the CAPDAC has been changed by the autoCAPDAC function.
Table 6. Status Register Bit Map
Bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Mnemonic PwrDown
DacStep2
OUT2
DacStep1
OUT1 C1/C2
RDY2 RDY1
Default 0 1 0 1 0 0 1 1
Table 7. Status Register Bit Descriptions
Bit Mnemonic Description
7 PwrDown
PwrDown = 1 indicates that the part is in a power-down mode or that the part V
DD
is below the power supply
monitor threshold voltage.
6
DacStep2 DacStep2 = 0 indicates that the Ch2 CAPDAC value was changed after the last CDC conversion as part of the
AutoDac function. The bit value is updated after each finished CDC conversion on this channel.
5 OUT2
OUT2 = 1 indicates that the Ch2 data (CIN2 capacitance) crossed the threshold, according to the selected
comparator mode of operation. The bit value is updated after each finished CDC conversion on this channel.
4
DacStep1 DacStep1 = 0 indicates that the Ch1 CAPDAC value was changed during the last conversion as part of the
AutoDac function. The bit value is updated after each finished CDC conversion on this channel.
3 OUT1
OUT1 = 1 indicates that the Ch1 data (CIN1 capacitance) crossed the threshold, according to the selected
comparator mode of operation. The bit value is updated after each finished CDC conversion on this channel.
2 C1/C2
The C1/C2 = 0 indicates that the last finished CDC conversion was on Channel 1.
The C1/C2 = 1 indicates that the last finished CDC conversion was on Channel 2.
1
RDY2 RDY2 = 0 indicates a finished CDC conversion on Ch2. The bit is reset back to 1 when the Ch2 data register is
read via the serial interface or after the part reset or power-up.
0
RDY1 RDY1= 0 indicates a finished CDC conversion on Ch1. The bit is reset back to 1 when the Ch1 data register is
read via serial interface or after the part reset or power-up.