Datasheet > MS-2212

MS-2212

更新时间： 2022-03-31 02:18:27

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
5页	248K
描述
Technical Article

阅读下载

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

MS-2212 数据手册

MS-2212

Technical Article

Table 1.

Competitor

Type

Spec (mA)

Follower (mA)

0.707

Vol (mA)

0.506

0.565

1.188

3.442

2.051

5.336

0.544

0.361

2.759

0.822

Voh (mA)

0.671

0.567

6.683

0.708

3.998

3.786

0.625

10.152

2.475

0.667

LM358

Bipolar

CMOS

30V

36V

30V

24V

30V

LM393

2.5

0.548

OP184

1.239

0.45

3.4

4.5

1.2

0.9

2.4

1.4

0.361

2.785

4.063

AD8605

0.998

0.511

1.916

1.039

Red highlighted values indicate exceeds data sheet limit.

V+

Finally, in the desire to reduce die size and, therefore, cost,

some circuits, such as bias circuits and the associated startup

circuit, may be shared by both op amps. As mentioned

previously (8), if one op amp operates outside of its normal

range and causes the bias circuit to malfunction, then the

other op amp will malfunction also.

INPUT FROM

SECOND GAIN

STAGE

OUT

In battery operated systems or when using low current series

regulators, the additional supply current should be

considered. Battery life may be less than calculated, or the

regulator may not start up under all conditions, especially

over temperature.

V–

Tips

Figure 6.

For new designs, the easiest solution is “Don’t use op amps

as comparators!” If you must, or have used one by accident

as a comparator:

CMOS Rail-to-Rail Op Amps

The CMOS op amps have an interesting behavior. In some

cases, the supply current actually goes down when driven to

a rail. The output stage of a CMOS op amp consists of

common source PMOS and NMOS transistors, and gain is

taken in the output stage. The gain is gm × R_L, and to get a

reasonable value of transconductance, the drive circuit is

designed to set the quiescent current to a certain value. As

the output is driven into the rail, the drive circuit will

decrease the drive on the complementary transistor.

Depending on the transfer characteristics from the top

transistor to the bottom transistor, the current will actually

decrease. Note the wide variation in behavior among the

four CMOS op amps selected.

•

Check the data sheet to see if the manufacturer

has any information on operation as a

comparator. Some manufacturers are adding

this information (9,±0).

•

If the information is not there, ask the

manufacturer if it is available.

If they cannot provide it, measure several date

codes yourself using the circuits shown previously,

and add 50% for a safety factor.

www.analog.com

November 2011 | Page 4 of 5

1 2 345

下载PDF

与MS-2212相关器件

型号	品牌	描述	获取价格	数据表
MS2212102	AMETHERM	Circuit Protection Thermistors	获取价格
MS2212102_14	AMETHERM	Erin Landis	获取价格
MS2212102-A	AMETHERM	Circuit Protection Thermistors	获取价格
MS2212102-B	AMETHERM	Circuit Protection Thermistors	获取价格
MS2212103	AMETHERM	Circuit Protection Thermistors	获取价格
MS2212103-A	AMETHERM	Circuit Protection Thermistors	获取价格