AD7151BRMZ Analog Devices Inc, AD7151BRMZ Datasheet - Page 15

• Manufacturer Part Number: AD7151BRMZ
• Description: IC CAP CONV 1CH ULT LP 10MSOP
• Manufacturer: Analog Devices Inc
• Type: Capacitance-to-Digital Converterr

Specifications of AD7151BRMZ

• Input Type: Voltage
• Output Type: Digital
• Interface: 2-Wire Serial
• Current - Supply: 120µA
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Resolution (bits): 12bit
• Sampling Rate: 100SPS
• Input Channel Type: Single Ended
• Data Interface: 2-Wire, I2C, Serial
• Supply Voltage Range - Analog: 2.7V To 3.6V
• Supply Current: 70µA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STATUS REGISTER
Address Pointer 0x00
8 Bits, Read-Only, Default Value 0x53 Before Conversion, 0x52 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
Mnemonic
Default
Table 7. Status Register Bit Descriptions
Bit
7
6
5
4
3
2
1
0
Mnemonic
PwrDown
–
–
DacStep
OUT
–
–
RDY
Description
PwrDown = 1 indicates that the part is in a power-down mode or that the part V
monitor threshold voltage.
Bit not used, always reads 1.
Bit not used, always reads 0.
DacStep = 0 indicates that the CAPDAC value was changed during the last conversion as part of the AutoDac
function. The bit value is updated after each finished CDC conversion.
OUT = 1 indicates that the data (CIN capacitance) crossed the threshold, according to the selected comparator
mode of operation. The bit value is updated after each finished CDC conversion.
Bit not used, always reads 0.
Bit not used, always reads 1.
RDY = 0 indicates a finished CDC conversion. The bit is reset back to 1 when the data register is read via the
serial interface or after the part reset or power-up.
PwrDown
Bit 7
0
Bit 6
–
1
Bit 5
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0
–
DacStep
Bit 4
1
Bit 3
OUT
0
Bit 2
–
0
DD
is below the power supply
Bit 1
–
1
AD7151
Bit 0
RDY
1