ADS1218_14 Datasheet, PDF (23/45 Pages) Texas Instruments – 8-Channel, 24-Bit ANALOG-TO-DIGITAL CONVERTER with FLASH Memory

ADS1218
www.ti.com
SBAS187C – SEPTEMBER 2001 – REVISED SEPTEMBER 2005
MUX (Address 01_H) Multiplexer Control Register
Reset value is set by Flash memory page 0. Factory programmed to 01_H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
PSEL3
PSEL2
PSEL1
PSEL0
NSEL3
NSEL2
NSEL1
NSEL0
bits 7-4
bits 3-0
PSEL3: PSEL2: PSEL1: PSEL0: Positive Channel Select
0000 = A_IN0
0001 = A_IN1
0010 = A_IN2
0011 = A_IN3
1xxx = A_INCOM (except when all bits are 1s)
1111 = Temperature Sensor Diode
NSEL3: NSEL2: NSEL1: NSEL0: Negative Channel Select
0000 = A_IN0
0001 = A_IN1
0010 = A_IN2
0011 = A_IN3
1xxx = A_INCOM (except when all bits are 1s)
1111 = Temperature Sensor Diode
0100 = A_IN4
0101 = A_IN5
0110 = A_IN6
0111 = A_IN7
0100 = A_IN4
0101 = A_IN5
0110 = A_IN6
0111 = A_IN7
ACR (Address 02_H) Analog Control Register
Reset value is set by Flash memory page 0. Factory programmed to 00_H.
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
BOCS
IDAC2R1
IDAC2R0
IDAC1R1
IDAC1R0
PGA2
bit 1
PGA1
bit 0
PGA0
bit 7 BOCS: Burnout Current Source
0 = Disabled
1 = Enabled
ǒ Ǔ IDAC Current +
V _REF
8R_DAC
ǒ₂^RANGE*1Ǔ(DAC _Code)
bits 6-5 IDAC2R1: IDAC2R0: Full-Scale Range Select for IDAC2
00 = Off
01 = Range 1
10 = Range 2
11 = Range 3
bits 4-3 IDAC1R1: IDAC1R0: Full-Scale Range Select for IDAC1
00 = Off
01 = Range 1
10 = Range 2
11 = Range 3
bits 2-0 PGA2: PGA1: PGA0: Programmable Gain Amplifier Gain Selection
000 = 1
001 = 2
010 = 4
011 = 8
100 = 16
101 = 32
110 = 64
111 = 128
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