Datasheet

LTC4151
12
4151ff
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Table 3. SENSE Registers A (00h) and B (O1h)—Read/Write
BIT NAME OPERATION
A7:0, B7:4 SENSE Voltage Data 12-Bit Data of Current Sense Voltage with 20µV LSB and 81.92mV Full-Scale
B3 ADC Busy in Snapshot Mode 1 = SENSE Being Converted; 0 = SENSE Conversion Completed. Not Writable
B2:0 Reserved Always Returns 0. Not Writable
Table 4. V
IN
Registers C (02h) and D (O3h)—Read/Write
BIT NAME OPERATION
C7:0, D7:4 V
IN
Voltage Data 12-Bit Data of V
IN
Voltage with 25mV LSB and 102.4V Full-Scale
D3 ADC Busy in Snapshot Mode 1 = V
IN
Being Converted; 0 = V
IN
Conversion Completed. Not Writable
D2:0 Reserved Always Returns 0, Not Writable
Table 5. ADIN Registers E (04h) and F (O5h)—Read/Write
BIT NAME OPERATION
E7:0, F7:4 ADIN Voltage Data 12-Bit Data of Current Sense Voltage with 500µV LSB and 2.048V Full-Scale
F3 ADC Busy in Snapshot Mode 1 = ADIN Being Converted; 0 = ADIN Conversion Completed. Not Writable
F2:0 Reserved Always Returns 0, Not Writable
applicaTions inForMaTion
Table 2. LTC4151 Register Address and Contents
REGISTER ADDRESS* REGISTER NAME READ/WRITE DESCRIPTION
00h SENSE (A) R/W** ADC Current Sense Voltage Data (8 MSBs)
01h SENSE (B) R/W** ADC Current Sense Voltage Data (4 LSBs)
02h V
IN
(C) R/W** ADC V
IN
Voltage Data (8 MSBs)
03h V
IN
(D) R/W** ADC V
IN
Voltage Data (4 LSBs)
04h ADIN (E) R/W** ADC ADIN Voltage Data (8 MSBs)
05h ADIN (F) R/W** ADC ADIN Voltage Data (4 LSBs)
06h CONTROL (G) R/W Controls ADC Operation Mode and Test Mode
07h Reserved
*Register address MSBs b7-b3 are ignored. **Writable if bit G4 is set.
Table 6. CONTROL Register G (06h)—Read/Write
BIT NAME OPERATION
G7 ADC Snapshot Mode
Enable
Enables ADC Snapshot Mode; 1 = Snapshot Mode Enabled. Only the channel selected by G6 and G5 is
measured by the ADC. After the conversion, the channel busy bit is reset and the ADC is halted.
0 = Snapshot Mode Disabled (ADC free running, Default).
G6
ADC Channel Label for
Snapshot Mode
ADC Channel Label for Snapshot Mode
G6 G5 ADC CHANNEL
0 0 SENSE (Default)
0 1 V
IN
1 0 ADIN
G5 ADC Channel Label for
Snapshot Mode
G4 Test Mode Enable Test Mode Halts ADC Operation and Enables Writes to ADC Registers; 1 = Enable Test Mode,
0 = Disable Test Mode (Default)
G3
Page Read/Write Enable Enables Page Read/Write; 1 = Enable I
2
C Page Read/Write (Default), 0 = Disable I
2
C Page Read/Write
G2 Stuck-Bus Timer Enable Enables I
2
C Stuck-Bus Reset Timer; 1 = Enable Stuck-Bus Timer (Default), 0 = Disable Stuck-Bus Timer
G1:0 Reserved Always Returns 0, Not Writable