LTC4151/LTC4151-1

12

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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

BIT

NAME

OPERATION

C7:0, D7:4

D3

ADC Busy in Snapshot Mode

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/LTC4151-1 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

VIN (C)

R/W**

ADC VIN Voltage Data (8 MSBs)

03h

VIN (D)

R/W**

ADC VIN 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)

01

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

G2

Stuck-Bus Timer Enable

G1:0

Reserved

Always Returns 0, Not Writable