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LTC2970/LTC2970-1

29701fc

ADC_MON: ADC Monitoring Mux Control Register – Read/Write

BIT(s)

SYMBOL

OPERATION

b[0]

b[1]

b[2]

b[3]

b[4]

b[5]

b[6]

Adc_mon_vdd

Adc_mon_v12

Adc_mon_ch0_a

Adc_mon_ch0_b

Adc_mon_ch1_a

Adc_mon_ch1_b

Adc_mon_temp

0 = ADC will not convert associated

channel. (Default)

1 = ADC will continuously convert

associated channel.

b[15:7]

Reserved

Always Returns 0

SYNC: Tracking Synchronization Control Register – Read/Write

LTC2970-1 Only

BIT(s)

SYMBOL

OPERATION

b[0]

Sync_track

Write

0 = Do not synchronize.

1 = Synchronize all tracking enabled

registers to the same starting point.

Read

0 = The LTC2970-1 is not synchronized

for tracking (default).

1 = The LTC2970-1 is synchronized for

tracking.

Use of the global address will allow

the synchronization status of multiple

LTC2970-1s to be veriﬁed in a single

read; since a one can only be returned

if all LTC2970-1s are synchronized. The

IO_track_start command may then be

issued with the same global address

to begin synchronized tracking across

multiple ICs.

b[15:1]

Reserved

Always Returns 0

OPERATIO

VDD_ADC, V12_ADC, CH0_A_ADC, CH0_B_ADC, CH1_A_ADC,

CH1_B_ADC, and TEMP_ADC: ADC Conversion Result Registers

– Read Only Unless Speciﬁed Otherwise

BIT(s)

SYMBOL

OPERATION

b[14:0]

Vdd_adc[14:0]

V12_adc[14:0]

Ch0_a_adc[14:0]

Ch0_b_adc[14:0]

Ch1_a_adc[14:0]

Ch1_b_adc[14:0]

Temp_adc[14:0]

Measured data from ADC conversion.

'h4000 corresponds to negative full-

scale input voltage.

'h0000 corresponds to 0V.

'h3fff corresponds to full-scale input

voltage.

2’s complement format, b[14] = sign.

Read/Write when Io_i2c_adc_wen = 1.

Default value is undeﬁned.

b[15]

Vdd_adc_new

V12_adc_new

Ch0_a_adc_new

Ch0_b_adc_new

Ch1_a_adc_new

Ch1_b_adc_new

Temp_adc_new

1 = The ADC has updated the

associated result register since the last

time the data was read.

0 = Previously read data. (Default)

VDD_OV, V12_OV, CH0_A_OV, CH0_B_OV, CH1_A_OV, CH1_B_

OV: Over Voltage Limit Registers – Read/Write

BIT(s)

SYMBOL

OPERATION

b[14:0]

Vdd_ov[14:0]

V12_ov[14:0]

Ch0_a_ov[14:0]

Ch0_b_ov[14:0]

Ch1_a_ov[14:0]

Ch1_b_ov[14:0]

ADC over-voltage threshold limit.

The associated instantaneous over

voltage fault is asserted if the channel’s

ADC result is greater than this limit.

Code 'h3fff disables OV threshold

detect feature for that channel.

2’s complement format, b[14] = sign.

Default value is undeﬁned.

b[15]

Reserved

Always Returns 0

VDD_UV, V12_UV, CH0_A_UV, CH0_B_UV, CH1_A_UV, CH1_B_

UV: Under Voltage Limit Registers – Read/Write

BIT(s)

SYMBOL

OPERATION

b[14:0]

Vdd_uv[14:0]

V12_uv[14:0]

Ch0_a_uv[14:0]

Ch0_b_uv[14:0]

Ch1_a_uv[14:0]

Ch1_b_uv[14:0]

ADC under-voltage threshold limit.

The associated instantaneous under

voltage fault is asserted if the channel’s

ADC result is greater than this limit.

Code 'h4000 disables UV threshold

detect feature for that channel.

2’s complement format, b[14] = sign.

Default value is undeﬁned.

b[15]

Reserved

Always Returns 0

4. Detailed I2C Command Register Descriptions

(Cont.)

LTC2970CUFD Datasheet(PDF) 18 Page - Linear Technology

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