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LTC2970IUFD-PBF Datasheet(PDF) 5 Page - Linear Technology |
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LTC2970IUFD-PBF Datasheet(HTML) 5 Page - Linear Technology |
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5 / 36 page  LTC2970/LTC2970-1 5 29701fc The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS I2C Interface Timing Characteristics fSCL Serial Clock Frequency (Note 6) ● 10 400 kHz tLOW Serial Clock Low Period (Note 6) ● 1.3 μs tHIGH Serial Clock High Period (Note 6) ● 0.6 μs tBUF Bus Free Time Between Stop and Start (Note 6) ● 1.3 μs tHD,STA Start Condition Hold Time (Note 6) ● 600 ns tSU,STA Start Condition Setup Time (Note 6) ● 600 ns tSU,STO Stop Condition Setup Time (Note 6) ● 600 ns tHD,DAT Data Hold Time (LTC2970 Receiving Data) Data Hold Time (LTC2970 Transmitting Data) (Note 6) ● 0 300 900 ns ns tSU,DAT Data Setup Time (LTC2970 Receiving Data) (Note 6) ● 100 ns tSP Pulse Width of Spike Suppressed (Note 6) ● 98 ns tSETUP_GPIO GPIO_0 and GPIO_1 Setup Time GPIO_0 and GPIO_1 input setup time 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) ● 2.5 μs tHOLD_GPIO GPIO_0 and GPIO_1 Hold Time GPIO_0 and GPIO_1 input hold time 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) ● 2.5 μs tOUT_GPIO GPIO_0 and GPIO_1 Output Time GPIO_0 and GPIO_1 output delay after the 35th rising SCL of an I2C write. These outputs will become high impedance or begin driving low by this time. (Note 6) ● 2.5 μs 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 ms tSETUP_ADC ADC Channel Setup Time After selecting a new ADC channel, the LTC2970 will wait this amount of time to allow the analog input to settle before beginning an ADC conversion. 304 μs tTIMEOUT_ SYNC Tracking SYNC Failure Timer LTC2970-1 Only: The LTC2970-1 will abort a pending SYNC() command if a tracking command is not received before this amount of time has elapsed. 255 ms tHOLD_TRACK Tracking IDAC Disconnect Delay LTC2970-1 Only: After the tracking 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. 32 ms |
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