MAX1368ECM+ Maxim Integrated Products, MAX1368ECM+ Datasheet - Page 28

• Manufacturer Part Number: MAX1368ECM+
• Description: IC PANEL METER 3.5 DIG 48LQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1368ECM+

• Display Type: LED
• Configuration: 7 Segment
• Interface: Serial
• Digits Or Characters: A/D 3.5 Digits
• Voltage - Supply: 2.7 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -

Default values: 00h
ADC result register 2 is an 8-bit read-only register. This
register stores the 4 LSBs of the ADC result.
Default values: 0000h
ADC result register 1 is a 16-bit read-only register. This
register stores the 16 MSBs of the ADC result. The data
is represented in two’s-complement format.
Microcontroller-Interface, 4.5-/3.5-Digit Panel
Meters with 4–20mA Output
ADC Custom Offset-Calibration Register 3 (Read/Write)
Default values: 0000h
In addition to automatic offset calibration, the
MAX1366/MAX1368 offer a user-defined custom offset
16-bit read/write register. The final result of the ADC
conversion is the input after autocalibration minus
ADC Result Register 2 (Read Only)
Default values: 0000h
The LED data register is a 16-bit read/write register.
This register updates from ADC result register 1 or from
the serial interface by selecting the SPI/ADC bit in the
control register. The data is represented in two’s-com-
plement format.
28
ADC Result Register 1 (Read Only)
LED Data Register (Read/Write)
MSB
D15
MSB
D15
MSB
D15
______________________________________________________________________________________
MSB
D3
D14
D14
D14
D13
D13
D13
D2
D12
D12
D12
D11
D11
D11
D1
D10
D10
D10
D9
D9
D9
LSB
D0
D8
D8
D8
D7
D7
Use this result with the result in ADC result register 1 to
form a 20-bit two’s-complement conversion result.
For the MAX1366, the data is 16-bit and D15 is the
MSB. For the MAX1368, the data is 12-bit, D15 is the
MSB, and D4 is the LSB.
D7
the value in the custom offset. The custom offset value
is stored in this register. D15 is the MSB. The data is
represented in two’s-complement format.
For the MAX1366, the data is 16-bit and D15 is the
MSB. For the MAX1368, the data is 12-bit, D15 is the
MSB, and D4 is the LSB, followed by 4 trailing sub-bits.
0
D6
D6
D6
D5
D5
D5
(MAX1368)
(MAX1368)
0
LSB
LSB
D4
D4
D4
D3
D3
D3
0
D2
D2
D2
D1
D1
D1
(MAX1366)
(MAX1366)
0
LSB
D0
D0
LSB
D0
LSB