LM359MX datasheet(10/34 Pages) TI

部件名	LM359MX

功能描述	LM359 Dual, High Speed, Programmable, Current Mode (Norton) Amplifiers

Download	34 Pages

Scroll/Zoom	100%

制造商	TI [Texas Instruments]

网页	http://www.ti.com

标志

10 / 34 page

LM359

SNOSBT4C – MAY 1999 – REVISED MARCH 2013

www.ti.com

The nVBE biasing configuration is most useful for low noise applications where a reduced input impedance can

be accommodated (see Typical Applications section).

OPERATING CURRENT PROGRAMMABILITY (ISET)

The input bias current, slew rate, gain bandwidth product, output drive capability and total device power

consumption of both amplifiers can be simultaneously controlled and optimized via the two programming pins

ISET(OUT) and ISET(IN).

ISET(OUT)

The output set current (ISET(OUT)) is equal to the amount of current sourced from pin 1 and establishes the class A

biasing current for the Darlington emitter follower output stage. Using a single resistor from pin 1 to ground, as

shown in Figure 28, this current is equal to:

Figure 28. Establishing the Output Set Current

The output set current can be adjusted to optimize the amount of current the output of the amplifier can sink to

drive load capacitance and for loads connected to V+. The maximum output sinking current is approximately 10

times ISET(OUT). This set current is best used to reduce the total device supply current if the amplifiers are not

required to drive small load impedances.

ISET(IN)

The input set current ISET(IN) is equal to the current flowing into pin 8. A resistor from pin 8 to V

+ sets this current

to be:

Figure 29. Establishing the Input Set Current

ISET(IN) is most significant in controlling the AC characteristics of the LM359 as it directly sets the total input stage

current of the amplifiers which determines the maximum slew rate, the frequency of the open loop dominant pole,

the input resistance of the (

−) input and the biasing current Ib(−). All of these parameters are significant in wide

band amplifier design. The input stage current is approximately 3 times ISET(IN) and by using this relationship the

following first order approximations for these AC parameters are:

10

Submit Documentation Feedback

Product Folder Links: LM359

类似零件编号 - LM359MX

制造商	部件名	数据表	功能描述
Texas Instruments	LM359MX	1Mb / 34P	[Old version datasheet] Dual, High Speed, Programmable, Current Mode (Norton) Amplifiers
Texas Instruments	LM359MX/NOPB	1Mb / 34P	[Old version datasheet] Dual, High Speed, Programmable, Current Mode (Norton) Amplifiers

制造商	部件名	数据表	功能描述
Texas Instruments	LM359	1Mb / 34P	[Old version datasheet] Dual, High Speed, Programmable, Current Mode (Norton) Amplifiers
National Semiconductor ...	LM359	742Kb / 24P	Dual, High Speed, Programmable, Current Mode Norton Amplifiers
NTE Electronics	NTE869	25Kb / 3P	Integrated Circuit Dual, High Speed, Programmable Current Mode (Norton) Amp
Texas Instruments	LM2900DE4	618Kb / 16P	[Old version datasheet] QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
Texas Instruments	LM2900J	618Kb / 16P	[Old version datasheet] QUADRUPLE NORTON OPERATIONAL AMPLIFIERS
Linear Technology	LT6210	351Kb / 18P	Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers
	LT6211	351Kb / 18P	Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers
	LT6210	457Kb / 16P	Single/Dual Programmable Supply Current, R-R Output, Current Feedback Amplifiers
STMicroelectronics	TS272C	216Kb / 9P	HIGH SPEED CMOS DUAL OPERATIONAL AMPLIFIERS
STMicroelectronics	TS512	54Kb / 7P	HIGH SPEED PRECISION DUAL OPERATIONAL AMPLIFIERS