MIC7201 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – GainBlock™ Difference Amplifier Preliminary Information

MIC7201
Micrel
MIC7201
GainBlock™ Difference Amplifier
Preliminary Information
General Description
The MIC7201 difference amplifier is an analog gain block
designed to convert a differential signal to a signal-ended
signal. It features an extended common-mode range that
includes rail-to-rail input/output capabilities. The part is pack-
aged in the SOT-23-5 IttyBitty™ package.
The MIC7201 is designed using the MIC7101 operational
amplifier plus well-matched monolithic resistors to provide a
unity-gain stable differential input to signal-ended output
amplifier that requires a minimum of external components.
Performance is guaranteed from 2.2V through 10V.
Features
• Operates from 2.2V to 10V
• ±1% typical gain error
• 0.6mA typical supply current at 2.2V
• 400kHz bandwidth
• Small SOT-23-5 package
• Suitable for driving capacitive loads
Applications
• Cellular telephones
• Digital audio systems
• Mobile communications
• Portable computers and PDAs
Ordering Information
Part Number
Temperature Range
MIC7201BM5
–40°C to +85°C
Other voltages available. Contact Micrel for details.
Package
SOT-23-5
Block Diagram
V+ 2
100k
IN+ ^50k
3
100k
IN– ^50k
4
MIC7201
OUT
1
50k
V– ⁵
V_IN–
V_IN+
V_OUT
Difference Amplifier Behavior
The desired 100mV, 400Hz differential sinusoidal signal is shown applied to
inputs V_IN– and V_IN+. A 500mV, 5kHz square-wave “noise” signal is super-
imposed on both V_IN– and V_IN+.
These signals demonstrate the noise cancellation ability of the MIC7201.
The output (V_OUT) shows the recovered single-ended 200mV peak-to-peak,
400Hz sine wave.
GainBlock is a trademark of Micrel, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com
December 1998
1
MIC7201