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| ADS1218_14 Datasheet, PDF (24/45 Pages) Texas Instruments – 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory | |||
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ADS1218
SBAS187C â SEPTEMBER 2001 â REVISED SEPTEMBER 2005
IDAC1 (Address 03H) Current DAC 1
Reset value is set by Flash memory page 0. Factory programmed to 00H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
IDAC1_7
IDAC1_6
IDAC1_5
IDAC1_4
IDAC1_3
IDAC1_2
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bit 1
IDAC1_1
bit 0
IDAC1_0
The DAC code bits set the output of DAC1 from 0 to full-scale. The value of the full-scale current is set by this Byte, VREF, RDAC, and the
DAC1 range bits in the ACR register.
IDAC2 (Address 04H) Current DAC 2
Reset value is set by Flash memory page 0. Factory programmed to 00H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
IDAC2_7
IDAC2_6
IDAC2_5
IDAC2_4
IDAC2_3
IDAC2_2
IDAC2_1
IDAC2_0
The DAC code bits set the output of DAC2 from 0 to full-scale. The value of the full-scale current is set by this Byte, VREF, RDAC, and the
DAC2 range bits in the ACR register.
ODAC (Address 05H) Offset DAC Setting
Reset value is set by Flash memory page 0. Factory programmed to 00H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
SIGN
OSET6
OSET5
OSET4
OSET3
OSET2
bit 7
bits 6-0
NOTE:
Offset Sign
0 = Positive
1 = Negative
Ç Ç Offset
+
V REF
2PGA
Code
127
The offset must be used after calibration or the calibration will notify the effects.
OSET1
OSET0
DIO (Address 06H) Digital I/O
Reset value is set by Flash memory page 0. Factory programmed to 00H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
DIO7
DIO6
DIO5
DIO4
DIO3
DIO2
DIO1
DIO0
A value written to this register will appear on the digital I/O pins if the pin is configured as an output in the DIR register. Reading this
register will return the value of the digital I/O pins.
DIR (Address 07H) Direction control for digital I/O
Reset value is set by Flash memory page 0. Factory programmed to FFH.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
DIR7
DIR6
DIR5
DIR4
DIR3
DIR2
DIR1
DIR0
Each bit controls whether the Digital I/O pin is an output (= 0) or input (= 1). The default power-up state is as
inputs.
24
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