AD7151BRMZ Analog Devices Inc, AD7151BRMZ Datasheet - Page 17

• 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

TIMEOUT REGISTER
Address Pointer 0x0A
8 Bits, Read/Write, Factory Preset 0x86
Table 9. Timeout Register Bit Map
Bit
Mnemonic
Default
The register sets timeouts for the adaptive threshold mode.
The approaching timeout starts when the CDC data crosses the
data average ± sensitivity band toward the threshold, according
to the selected positive, negative, or window threshold mode. The
approaching timeout elapses after the number of conversion cycles
equals 2
significant bits of the timeout register.
The receding timeout starts when the CDC data crosses the
data average ± sensitivity band away from the threshold,
according to the selected positive or negative threshold mode.
The receding timeout is not used in the window threshold
mode. The receding timeout elapses after the number of
conversion cycles equals 2
value of the four least significant bits of the timeout register.
TimeOutApr
, where TimeOutApr is the value of the four most
TimeOutRec
TimeOutApr
Bits [7:4]
, where TimeOutRec is the
0x08
TimeOutRec
Bits [3:0]
0x06
Rev. 0 | Page 17 of 28
When either the approaching or receding timeout elapses (that
is, after the defined number of CDC conversions is counted),
the data average (and thus the thresholds) is forced to follow the
new CDC data value immediately.
When the timeout register equals 0, timeouts are disabled.
DATA AVERAGE
DATA AVERAGE
DATA AVERAGE
DATA AVERAGE
+ SENSITIVITY
+ SENSITIVITY
THRESHOLD
THRESHOLD
After a Large Change in CDC Data Away from Threshold
After a Large Change in CDC Data Toward Threshold
Figure 37. Threshold Timeout Approaching
Figure 38. Threshold Timeout Receding
AWAY FROM THE THRESHOLD
LARGE CHANGE IN DATA
TIMEOUT APPROACHING
TIMEOUT RECEDING
LARGE CHANGE IN DATA
TOWARDS THRESHOLD
TIME
TIME
AD7151