LTC2970CUFD-1-PBF Ver la hoja de datos (PDF) - Linear Technology

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LTC2970CUFD-1-PBF

Dual I2C Power Supply Monitor and Margining Controller

Linear Technology 

LTC2970/LTC2970-1

ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C.

SYMBOL PARAMETER

CONDITIONS

MIN TYP MAX

I2C Interface Timing Characteristics

fSCL

Serial Clock Frequency

tLOW

Serial Clock Low Period

(Note 6)

(Note 6)

● 10

400

● 1.3

tHIGH

Serial Clock High Period

(Note 6)

● 0.6

tBUF

Bus Free Time Between Stop and Start

(Note 6)

● 1.3

tHD,STA

Start Condition Hold Time

(Note 6)

● 600

tSU,STA

Start Condition Setup Time

(Note 6)

● 600

tSU,STO

Stop Condition Setup Time

(Note 6)

● 600

tHD,DAT

Data Hold Time (LTC2970 Receiving Data) (Note 6)

Data Hold Time (LTC2970 Transmitting Data)

●

0

300

900

tSU,DAT

Data Setup Time (LTC2970 Receiving Data) (Note 6)

● 100

tSP

Pulse Width of Spike Suppressed

(Note 6)

●

98

tSETUP_GPIO GPIO_0 and GPIO_1 Setup Time

GPIO_0 and GPIO_1 input setup time

● 2.5

prior to the 26th rising SCL of an IO()

I2C read. These inputs must be valid and

stable by this time to be returned in the

IO() read result. (Note 6)

tHOLD_GPIO GPIO_0 and GPIO_1 Hold Time

GPIO_0 and GPIO_1 input hold time

● 2.5

after the 26th rising SCL of an IO() I2C

read. These inputs must be held until

this amount of time has elapsed to be

returned in the IO() read result. (Note 6)

tOUT_GPIO GPIO_0 and GPIO_1 Output Time

GPIO_0 and GPIO_1 output delay after ●

2.5

the 35th rising SCL of an I2C write. These

outputs will become high impedance or

begin driving low by this time. (Note 6)

Internal Timers

tTIMEOUT_SMB Stuck BUS Timer

The LTC2970 will release the I2C bus and

terminate the current command if the

command is not completed before this

amount of time has elapsed.

24

32

39

tSETUP_ADC ADC Channel Setup Time

After selecting a new ADC channel, the

304

LTC2970 will wait this amount of time

to allow the analog input to settle before

beginning an ADC conversion.

tTIMEOUT_ Tracking SYNC Failure Timer

LTC2970-1 Only: The LTC2970-1 will

255

SYNC

abort a pending SYNC() command if a

tracking command is not received before

this amount of time has elapsed.

tHOLD_TRACK Tracking IDAC Disconnect Delay

LTC2970-1 Only: After the tracking

32

algorithm asserts CPIO_CFG low, the

LTC2970-1 will delay disconnecting the

IDACs from the power supply feedback

nodes by this amount of time. Used while

tracking power supplies on.

UNITS

kHz

μs

μs

μs

ns

ns

ns

ns

ns

ns

ns

μs

μs

μs

ms

μs

ms

ms

29701fc

5

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