LMP90100MHE National Semiconductor, LMP90100MHE Datasheet - Page 53

• 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

18.5 Calibration Registers
BGCALCN: Background Calibration Control (Address 0x10)
SCALCN: System Calibration Control (Address 0x17)
CHx_SCAL_OFFSET: CH0-CH3 System Calibration Offset Registers (Two's-Complement)
CHx_SCAL_GAIN: CH0-CH3 System Calibration Gain Registers (Two's-Complement)
CH0
0x30
0x31
0x32
CH0
0x33
0x34
0x35
[7:2] Reserved
[1:0] BGCALN
[7:2] Reserved
[1:0] SCALCN
Bit Bit Symbol
Bit Bit Symbol
CH1
0x38
0x39
0x3A 0x42
CH1
0x3B 0x43
0x3C 0x44
0x3D 0x45
ADDR
ADDR
CH2
0x40
0x41
CH2
CH3
0x48
0x49
0x4A CHx_SCAL_OFFSETL
CH3
0x4B CHx_SCAL_GAINH
0x4C CHx_SCAL_GAINM
0x4D CHx_SCAL_GAINL
Name
CHx_SCAL_OFFSETH
CHx_SCAL_OFFSETM
Name
Bit Description
-
Background calibration control – selects scheme for continuous background calibration.
0x0 (default): BgcalMode0: Background Calibration OFF
0x1: BgcalMode1: Offset Correction / Gain Estimation
0x2: BgcalMode2: Offset Correction / Gain Correction
0x3: BgcalMode3: Offset Estimation / Gain Estimation
Bit Description
-
System Calibration Control
When written, set SCALCN to:
0x0 (default): Normal Mode
0x1: “System Calibration Offset Coefficient Determination” mode
0x2: “System Calibration Gain Coefficient Determination” mode
0x3: Reserved
When read, this bit indicates the system calibration mode is in:
0x0: Normal Mode
0x1: "System Calibration Offset Coefficient Determination" mode
0x2: "System Calibration Gain Coefficient Determination" mode
0x3: Reserved
Note: when read, this bit will indicate the current System Calibration status. Since this co-
efficient determination mode will only take 1 conversion cycle, reading this register will only
return 0x00, unless this register is read within 1 conversion window.
53
Description
System Calibration Offset Coefficient Data [23:16]
System Calibration Offset Coefficient Data [15:8]
System Calibration Offset Coefficient Data[7:0]
Description
System Calibration Gain Coefficient Data [23:16]
System Calibration Gain Coefficient Data [15:8]
System Calibration Gain Coefficient Data[7:0]
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