Clarification Ultrasonic Sensors..!!! - Page 3 - Electronic Circuits Projects Diagrams Free

audioguru · 25th October 2007, 11:14 PM

Quote:

Originally Posted by Lesh

Which graph? I think we are looking at different data sheets. TI and ST data sheets list a spec of 700khz min. ST does have a GBP to temperature graph.
Which manufactures data sheet are you looking at?

National Semi invented the LM358 so I look at their datasheet.

ST Micro says that its GBP is 1.1MHz when it has a 5V supply, but its graph shows 1.1MHz with a 30V supply and only about 500KHz with a 10V to 15V supply. ST Micro frequently get things mixed up.

TI says its GBP is only 700kHz typical when it has a 30V supply. No graphs.

tippa · 3rd March 2009, 12:15 AM

i too want an receiver circuit for amplifying 40khz signal from GL402R receiver... i want amplified signal of max 5v what should be the gain and can i use LM358 for that...plz anyone provide me the circuit for that

audioguru · 3rd March 2009, 01:58 AM

At 40kHz an LM358 has a max output level of only 3V p-p and a max gain of only 25 if the supply is between 10V and 15V. If the supply is 5V then it can hardly amplify 40kHz.

An MC34071 single opamp, MC34072 dual opamp or MC34074 quad opamp) also have a minimum supply voltage of 3V and have inputs that work at ground in a single supply circuit but have full output level up to 100kHz and have a max gain at 40kHz of 200.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar
Title	Starter	Forum	Replies	Latest
ultrasonic sensors	gut_but	Electronic Projects Design/Ideas/Reviews	2	25th March 2005 01:36 AM
Two sensors, one interrupt pin!!!	2camjohn	General Electronics Chat	8	11th August 2004 02:12 AM
srf04 ultrasonic sensors	cjgalway1000	Robotics Chat	2	5th March 2004 05:55 PM
ultrasonic sensors	gef1234	Datasheet/Parts Requests	1	10th December 2003 03:20 AM
Ultrasonic	tindy	Datasheet/Parts Requests	3	6th October 2003 04:47 AM

3rd March 2009, 12:15 AM	#32
tippa	i too want an receiver circuit for amplifying 40khz signal from GL402R receiver... i want amplified signal of max 5v what should be the gain and can i use LM358 for that...plz anyone provide me the circuit for that

3rd March 2009, 01:58 AM	#33
audioguru	At 40kHz an LM358 has a max output level of only 3V p-p and a max gain of only 25 if the supply is between 10V and 15V. If the supply is 5V then it can hardly amplify 40kHz. An MC34071 single opamp, MC34072 dual opamp or MC34074 quad opamp) also have a minimum supply voltage of 3V and have inputs that work at ground in a single supply circuit but have full output level up to 100kHz and have a max gain at 40kHz of 200. __________________ Uncle $crooge