LMP90100MHE National Semiconductor, LMP90100MHE Datasheet - Page 56

• Manufacturer Part Number: LMP90100MHE
• Description: AFE, SENSOR, 28TSSOP
• Manufacturer: National Semiconductor

Specifications of LMP90100MHE

• Brief Features: 24bit Low Power Sigma Delta ADC, Automatic Channel Sequencer
• Supply Voltage Range: 2.7V To 5.5V
• Operating Temperature Range: -40°C To +105°C
• Digital Ic Case Style: TSSOP
• No. Of Pins: 28
• Base: RoHS Compliant
• Ic Function: Multi-Channel, Low Power 24-bit Sensor AFE
• Rohs Compliant: Yes

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DATA_ONLY_2: Data Only Read Control 2 (Address 0x0A)
SPI_DRDYBCN: SPI Data Ready Bar Control (Address 0x11 )
SPI_CRC_CN: CRC Control (Address 0x13 )
[7:3] Reserved
[2:0]
[6:4] Reserved
[2:0] Reserved
[7:5] Reserved
[1:0] Reserved
Bit Bit Symbol
Bit Bit Symbol
Bit Bit Symbol
7
5
3
4
3
2
DATA_ONLY_SZ
SPI_DRDYB_D6
DIS_DRDYB_QLFN
FGA_BGCAL
EN_CRC
DIS_CRC_RST
DRDYB_AFT_CRC
Bit Description
-
Number of bytes to be read out in Data Only mode. A value of 0x0 means read one byte
and 0x7 means read 8 bytes.
Default: 0x2
Bit Description
Enable DRDYB on D6
0 (default): D6 is a GPIO
1: D6 = drdyb signal
-
Enable DRDYB on D6
0 (default): Enter Data-Only mode when both DRDYB and CSB are asserted
1: Enter Data-Only mode when CSB is asserted
Gain background calibration
0 (default): Correct FGA gain error. This is useful only if the device is operating in Bg-
calMode2 and ScanMode2 or ScanMode3.
1: Correct FGA gain error using the last known coefficients.
Default - 0x3 (do not change this value)
Bit Description
-
Enable CRC
0 (default): Disable CRC
1: Enable CRC
0: CRC is not reinitialized at the end of the data only transaction. This way, CRC checking
can be extended to include any ADC_DOUT that follows the data only read transaction. It
could also include ADC_DOUT of subsequent data only read transactions.
1 (default): CRC is reinitialized at the end of the data only read transaction.
DRDYB After CRC
0 (default): DRDYB is deasserted (active high) after ADC_DOUTL is read.
1: DRDYB is deasserted after SPI_CRC_DAT (which follows ADC_DOUTL), is read.
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