LTM4663 datasheet(26/30 Pages) AD

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LT8722

Rev. 0

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SPIS_AMUX Register

This register is used to enable and disable analog monitor for internal signal monitoring.

BITS

SYMBOL

VALUE

SIGNAL

DESCRIPTION

B[3:0]

AMUX[3:0]

4b0000 VILIMP

The 9-bit internal DAC Voltage that controls the positive Output current limit

4b0001 VILIMN

The 9-bit internal DAC Voltage that controls the negative Output current limit

4b0010 V1P25 – 0.8 • VDAC

Translation of the internal 25-bit DAC voltage that controls VOUT

4b0011 V1P25 – VOUT/16

Translation of the VOUT Voltage. V1P25 can be measured on channel 4b0110

4b0100 V1P65 – IOUT/10

Translation of the IOUT Current. V1P65 can be measured on channel 4b0111

4b0101 0.6 • V2P5

Translation of the V2P5 Voltage when AMUX_TEST = 2b00 or 2b10

(6/13) • V2P5

Translation of the V2P5 Voltage when AMUX_TEST = 2b01 or 2b11

4b0110 V1P25

Translation of the V1P25 Voltage when AMUX_TEST = 2b00 or 2b10

0.8 • V1P25 + 0.2 • VCC

Translation of the V1P25 Voltage when AMUX_TEST = 2b01 or 2b11

4b0111 V1P65

Translation of the V1P65 Voltage when AMUX_TEST = 2b00 or 2b10

(2/3) • V1P65

Translation of the V1P65 Voltage when AMUX_TEST = 2b01 or 2b11

4b1000 VTEMP

Translation of the VTEMP Voltage when AMUX_TEST = 2b00 or 2b10

0.855 • VTEMP

Translation of the VTEMP Voltage when AMUX_TEST = 2b01 or 2b11

4b1001 0.9 • V2P5 – VIN/8

Translation of the VIN Input Voltage. V2P5 Can Be Measured by Using

Channel 4b0110

4b1010 0.4 • VCC

Translation of the VCC LDO Voltage when AMUX_TEST = 2b00 or 2b10

(3/7) • VCC

Translation of the VCC LDO Voltage when AMUX_TEST = 2b01 or 2b11

4b1011 0.4 • VDDIO

Translation of the VDDIO input Voltage when AMUX_TEST = 2b00 or 2b10

(4/7) • VDDIO

Translation of the VDDIO input Voltage when AMUX_TEST = 2b01 or 2b11

4b1100

(16/17) • V1P25 + VSFB/17

Translation of the VSFB voltage. V1P25 Can Be Measured by Using Channel

4b0110

4b1101

4b1110

4b1111

B[5:4]

AMUX_TEST[1:0] 2b00

Affects Gain of AMUX[3:0] Channels 4b0101, 0110, 0111, 1000, 1010, 1011

2b10

2b01

Affects Gain of AMUX[3:0] Channels 4b0101, 0110, 0111, 1000, 1010, 1011

2b11

B[6]

AOUT_EN

1b0

Analog Output Buffer Disabled

1b1

Analog Output Buffer Enabled

B[31:7]

–

Ignored

SPI REGISTER DESCRIPTIONS

LTM4663 Datasheet(PDF) 26 Page - Analog Devices

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