AD7151BRMZ Analog Devices Inc, AD7151BRMZ Datasheet - Page 19

• 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

CONFIGURATION REGISTER
Address Pointer 0x0F
8 Bits, Read/Write, Factory Preset 0x19
Table 12. Configuration Register Bit Map
Bit
Mnemonic
Default
Table 13.Configuration Register Bit Descriptions
Bit
7
6
5
4
3
2
1
0
Mnemonic
ThrFixed
ThrMD1
ThrMD0
EnConv
–
MD2
MD1
MD0
Description
ThrFixed = 1 sets the fixed threshold mode. The output reflects comparison of data and a fixed (constant) value
of the threshold register.
ThrFixed = 0 sets the adaptive threshold mode. The output reflects comparison of data to the adaptive
threshold. The adaptive threshold is set dynamically, based on the history of the previous data.
These bits set the output comparator mode.
ThrMD1
0
0
1
1
Enables conversion. This bit must be 1 for proper operation.
This bit must be 0 for proper operation.
Converter mode of operation setup.
MD2
0
0
0
0
1
ThrFixed
Bit 7
0
MD1
0
0
1
1
X
ThrMD0
0
1
0
1
ThrMD1
Bit 6
0
MD0
0
1
0
1
X
Mode
Idle
Continuous
Conversion
Single Conversion
Power-Down
Reserved
Threshold Mode
Negative
Positive
In-Window
Out-Window
ThrMD0
Bit 5
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0
EnConv
Bit 4
1
Adaptive Threshold Mode
data < average – sensitivity
data > average + sensitivity
data > average – sensitivity
AND
data < average + sensitivity
data < average – sensitivity
OR
data > average + sensitivity
Description
Part is fully powered up but performing no conversion.
Part is repeatedly performing conversions, provided the
EnConv bit is set.
Part performs a single conversion, provided the EnConv bit
is set. After finishing the conversion(s), the part goes to the
idle mode.
Powers down the on-chip circuits, except the digital
interface.
Do not use these modes.
Bit 3
–
0
Output Active When
Bit 2
MD2
0
Fixed Threshold Mode
Data < Threshold
Data > Threshold
-
-
Bit 1
MD1
0
AD7151
Bit 0
MD0
1