December 2001

1

MIC921

MIC921

Micrel

MIC921

45MHz Low-Power SC-70 Op Amp

Final Information

General Description

The MIC921 is a high-speed operational amplifier with a gain-

bandwidth product of 45MHz. The part is unity gain stable. It

has a very low 300

µA supply current, and features the

Supply voltage range is from

±2.5V to ±9V, allowing the

MIC921 to be used in low-voltage circuits or applications

requiring large dynamic range.

The MIC921 is stable driving any capacitative load and

achieves excellent PSRR and CMRR, making it much easier

to use than most conventional high-speed devices. Low

supply voltage, low power consumption, and small packing

make the MIC921 ideal for portable equipment. The ability to

drive capacitative loads also makes it possible to drive long

coaxial cables.

Features

• 45MHz gain bandwidth product

• 61MHz –3dB bandwidth

• 300

µA supply current

• SC-70 or SOT-23-5 packages

• 3200V/

µs slew rate

• Drives any capacitive load

• 112dB CMRR

• Unity gain stable

Applications

• Video

• Imaging

• Ultrasound

• Portable equipment

• Line drivers

Ordering Information

Part Number

Junction Temp. Range

Package

MIC921BM5

–40

°C to +85°C

SOT-23-5*

MIC921BC5

–40

°C to +85°C

SC-70

*Contact factory for availability of SOT-23-5 package.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

Pin Description

Pin Number

Pin Name

Pin Function

1

IN+

Noninverting Input

2

V–

Negative Supply (Input)

3

IN–

Inverting Input

4

OUT

Output: Amplifier Output

5

V+

Positive Supply (Input)

Pin Configuration

IN+

V–

OUT

IN–

1

3

45

2

V+

A38

Part

Identification

SOT-23-5 or SC-70

Functional Pinout

IN+

V–

OUT

IN–

1

3

45

2

V+

SOT-23-5 or SC-70