proper routing strategy for LT1795 driver - Page 1
Forum section: electronics / projects

author: john23
author_rank: Frequent Contributor
timestamp: June 04, 2025, 11:35:21 am
content: Hello, I am trying to route using the following chip.I want to buy the following chip which already has two ampliiers inside of it.given my digikey product I have LT1795IFE package shown in the photo below.each LT1795 has SR S C pins in LTspice models.There is no SR pin in the datasheet what do they mean?Thanks.https://www.digikey.com/en/products/detail/analog-devices-inc/LT1795IFE-PBF/963543https://www.analog.com/media/en/technical-documentation/data-sheets/1795fa.pdf

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 04, 2025, 03:09:06 pm
content: I think SR = SHDNREF, S = SHDN and C = COMP.

author: john23
author_rank: Frequent Contributor
timestamp: June 04, 2025, 06:32:16 pm
content: how do you reccomend to connect these legs?

author: eutectique
author_rank: Frequent Contributor
timestamp: June 05, 2025, 11:52:42 am
content: Quote from: john23 on June 04, 2025, 06:32:16 pmAccording to your requirements and the data sheet.You've got a BSc degree in Electronics, haven't you?

author: Psi
author_rank: Super Contributor
timestamp: June 05, 2025, 12:17:17 pm
content: Quote from: eutectique on June 05, 2025, 11:52:42 amLast i checked having a BSc degree in electronics was not a requirement to use this forum.

author: eutectique
author_rank: Frequent Contributor
timestamp: June 05, 2025, 12:27:51 pm
content: Quote from: Psi on June 05, 2025, 12:17:17 pmOf course not. Though, a degree in the relevant engineering discipline would suggest an ability to read the first two paragraphs of page 7 of the linked data sheet, especially the one in bold typeface.

author: john23
author_rank: Frequent Contributor
timestamp: June 23, 2025, 02:44:47 pm
content: Hello,Given the datasheet below what is the difference between LT1795CSW and LT1795ISW.In the photo below they have two names next to the same shape . What it the difference?Thanks.https://www.digikey.com/en/products/detail/analog-devices-inc/LT1795CSW-PBF/890941https://www.analog.com/media/en/technical-documentation/data-sheets/1795fa.pdf

author: tooki
author_rank: Super Contributor
timestamp: June 23, 2025, 02:51:11 pm
content: Quote from: john23 on June 23, 2025, 02:44:47 pmThat information is found within the first few pages of the datasheet — somewhere before the datasheet information you were told about on page 7.Yes, it takes a bit of careful reading, but it’s there.Reading datasheets is a skill that must be learned and honed. I suggest practicing it.

author: john23
author_rank: Frequent Contributor
timestamp: June 23, 2025, 05:43:47 pm
content: Hello ,page seven talks about SHDN.I am looking for the reason why there are two name LT1795CSW and LT1795ISW neer each photo?

author: john23
author_rank: Frequent Contributor
timestamp: June 23, 2025, 08:19:58 pm
content: Hello , Its a temperature thing.Note 3: The LT1795C is guaranteed to meet specified performance from0°C to 70°C and is designed, characterized and expected to meet theseextended temperature limits, but is not tested at –40°C and 85°C. TheLT1795I is guaranteed to meet the extended temperature limits.

author: tooki
author_rank: Super Contributor
timestamp: June 25, 2025, 10:09:07 am
content: Quote from: john23 on June 23, 2025, 05:43:47 pmI know that. I didn’t say it wasonpage 7. I said it was somewherebeforepage 7 (the page you should already have read up to in answering the prior question). I didn’t want to just say “it’s within the first three pages” because then you’d just look on page 3.Quote from: john23 on June 23, 2025, 05:43:47 pmYep. The question was not unclear. But rather than just give you the answer, I wanted you to learn how to find it yourself, because reading datasheets, as frustrating as they often may be, is a key skill. And you did it!Quote from: john23 on June 23, 2025, 08:19:58 pmBingo!

author: john23
author_rank: Frequent Contributor
timestamp: June 26, 2025, 09:08:22 am
content: Hello, I am not using the comp nor I dont want to reduce quicent current so SHDN pin 10 is VDD,SHDNREF=GNDCorrect?For resistive loads, the COMP pin should be left open (seeCapacitive Loads sectionIf the shutdown/current set feature is not used, connectSHDN to V+ and SHDNREF to ground.SR = SHDNREF, S = SHDN and C = COMP.https://www.analog.com/media/en/technical-documentation/data-sheets/1795fa.pdf