MAX11270 Datasheet, PDF (36/46 Pages) Maxim Integrated Products – Integrated PGA

MAX11270
24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma
ADC with Integrated PGA
Control 5 Register (Read/Write)
The CTRL5 register is an 8-bit read/write register. The byte written to the CTRL5 register determines the MAX11270’s
reset, data overflow, and calibration modes.
BIT
B07
B06
B05
BIT NAME
CAL1
CAL0
—
DEFAULT
0
0
0
B04
B03
B02
B01
B00
—
NOSYSG NOSYSO
NOSCG
NOSCO
0
1
1
0
0
BIT DEFAULT
00
0
LABEL
NOSCO
FUNCTION
No self-calibration offset bit. Set NOSCO = 1 to disable the use of the self-calibration offset
value when computing the final offset and gain-corrected data value. Set NOSCO = 0 to
enable the use of the self-calibration offset value when computing the final offset and gain-
corrected data value.
No self-calibration gain bit. Set NOSCG = 1 to disable the use of the self-calibration gain value
01
0
NOSCG
when computing the final offset and gain-corrected data value. Set NOSCG = 0 to enable the
use of the self-calibration gain value when computing the final offset and gain-corrected data
value.
No system offset bit. Set NOSYSO = 1 to disable the use of the system offset value when
02
1
NOSYSO computing the final offset and gain-corrected data value. Set NOSYSO = 0 to enable the use
of the system offset value when computing the final offset-corrected data value.
No system gain bit. Set NOSYSG = 1 to disable the use of the system gain value when
03
1
NOSYSG computing the final offset and gain-corrected data value. Set NOSYSG = 0 to enable the use
of the system gain value when computing the final gain-corrected data value.
04
0
05
0
—
Reserved
—
Reserved
06
0
07
0
CAL0
CAL1
00 Perform Self Calibration
01 Perform System-Level Offset Calibration
10 Perform System-Level Full-Scale Calibration
11 Reserved
Data Register (Read Only)
The data register is a 32-bit or 24-bit read-only register. Any attempt to write data to the data register has no effect. The
data from this register is clocked out MSB first. The data register holds the conversion result. The result is stored in either
two’s complement or offset binary format, depending on the FORMAT bit in CTRL1 register.
The data format in unipolar mode is always offset binary. In bipolar mode, set the FORMAT bit = 1 for offset binary or
FORMAT = 0 for two’s compliment. Any input exceeding the available input range is limited to the minimum or maximum
data value.
BIT
DEFAULT
B31 B30 B29 B28 B27 B26 B25 B24 B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 B09 B08 B07 B06 B05 B04 B03 B02 B01 B00
00000000000000000000000000000000
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