Datasheet

ADC101C021, ADC101C027
SNAS446D –FEBRUARY 2008–REVISED FEBRUARY 2013 www.ti.com
Configuration Register
Pointer Address 02h (Read/Write)
Default Value: 00h
D7 D6 D5 D4 D3 D2 D1 D0
Cycle Time [2:0] Alert Hold Alert Flag Enable Alert Pin Enable 0 Polarity
Cycle Time[2:0] Conversion Typical
Interval f
convert
D7 D6 D5
(ksps)
0 0 0 Mode Disabled 0
0 0 1 T
convert
x 32 27
0 1 0 T
convert
x 64 13.5
0 1 1 T
convert
x 128 6.7
1 0 0 T
convert
x 256 3.4
1 0 1 T
convert
x 512 1.7
1 1 0 T
convert
x 1024 0.9
1 1 1 T
convert
x 2048 0.4
Bits Name Description
7:5 Cycle Time Configures Automatic Conversion mode. When these bits are set to zeros, the automatic conversion
mode is disabled. This is the case at power-up.
When these bits are set to a non-zero value, the ADC will begin operating in automatic conversion
mode. (See AUTOMATIC CONVERSION MODE). The Cycle Time table shows how different values
provide various conversion intervals.
4 Alert Hold 0: Alerts will self-clear when the measured voltage moves within the limits by more than the hysteresis
register value.
1: Alerts will not self-clear and are only cleared when a one is written to the alert high flag or the alert
low flag in the Alert Status register.
3 Alert Flag Enable 0: Disables alert status bit [D15] in the Conversion Result register.
1: Enables alert status bit [D15] in the Conversion Result register.
2 Alert Pin Enable 0: Disables the ALERT output pin. The ALERT output will TRI-STATE when the pin is disabled.
1: Enables the ALERT output pin.
*This bit does not apply to the ADC101C027.
1 Reserved Always reads zeros. Zeros must be written to these bits.
0 Polarity This bit configures the active level polarity of the ALERT output pin.
0: Sets the ALERT pin to active low.
1: Sets the ALERT pin to active high.
*This bit does not apply to the ADC101C027.
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Product Folder Links: ADC101C021 ADC101C027