MICREL MIC7201BM5 Datasheet

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 pack­aged 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 Package

MIC7201BM5 –40°C to +85°C SOT-23-5

Other voltages available. Contact Micrel for details.

Block Diagram

IN+

IN–

50k

3

50k

4

MIC7201

100k

100k

V+

V–

2

V

IN–

OUT

1

50k

5

V

V

OUT

IN+

Difference Amplifier Behavior

The desired 100mV, 400Hz differential sinusoidal signal is shown applied to
inputs V
imposed on both V

These signals demonstrate the noise cancellation ability of the MIC7201.
The output (V
400Hz sine wave.

IN–

and V

. A 500mV, 5kHz square-wave “noise” signal is super-

IN+

and V

IN–

) shows the recovered single-ended 200mV peak-to-peak,

OUT

IN+

.

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

MIC7201 Micrel

Pin Configuration

Pin Description

Pin Number Pin Name Pin Function

1 OUT Amplifier Output: Single-ended output.
2 V+ Positive Supply: Positive power supply input.
3 IN+ Noniverting Input: In-phase differential input.
4 IN– Inverting Input: Out-of-phase differential input.
5 V– Ground: Power supply ground return.

IN+

OUTV+

13

2

A16

45

IN–

SOT-23-5

V–

Part
Identification

MIC7201 2 December 1998

MIC7201 Micrel

Absolute Maximum Ratings (Note 1)

Supply Voltage (VV+–VV–).............................................12V

Differential Input Voltage (VV+–VV–) .................±(VV+–VV–)

I/O Pin Voltage (VIN, V

................................................ VV––0.3V to VV++0.3V

Junction Temperature (TJ) ...................................... +150°C

Storage Temperature (TS) ....................... –65°C to +150°C

Lead Temperature (soldering, 10 sec.) .....................260°C

OUT

), Note 2

Operating Ratings (Note 1)

Supply Voltage (VV+–VV–)............................ +2.2V to +10V

Input Voltage (V

Continuous Output Current ......................................±15mA

Junction Temperature (TJ) ......................... –40°C to +85°C

Max. Junction Temperature (T

Package Thermal Resistance (θJA), Note 4..........325°C/W

Max. Power Dissipation............................................ Note 3

IN+

, V

)................................... VV– to V

IN–

), Note 3 ...........+85°C

J(max)

ESD, Note 5.................................................................. 2kV

Electrical Characteristics (2.2V)

VV+ = 2.2V, VV– = 0V, VCM = V

Symbol Parameter Condition Min Typ Max Units

E

Z

TCV
R

IN

OS

Zero Error EZ = V
Input Offset Voltage Temp. Drift 14 µV/°C

Input Resistance 35 50 65 kΩ
CMRR Common-mode Rejection Ratio VCM = 0V to V
±PSRR Split-Supply Rejection Ratio V

+PSRR Single-Supply Rejection Ratio, V

Note 8

E
V

I

G
OUT

SC

Gain Error, Note 9 0.2V ≤ V

Output Voltage Swing output high, RL = 2k, 10 33 mV

Note 10 specified as VV+ – V

Output Short-Circuit Current sinking or sourcing, Note 6, Note 7 20 60 mA
BW Bandwidth –3dB point 400 kHz
SR Slew Rate 0.5 V/µs
THD Total Harmonic Distortion f = 1kHz 0.02 %

e

n

I

S

Input Referred Voltage Noise f = 1kHz 30

Supply Current no load 0.6 2.0 mA

= V+/2; RL = 1MΩ; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted

OUT

– VV+/2 944mV

OUT

V+

= VV– = 1.1V to 2.5V, 50 dB

V+

VCM = 0V

= 2.2V to 5V, VV– = 0V, VCM = 1.1V 6 dB

V+

≤ 2.0V ±1%

OUT

OUT

output low, R

output high, R
specified as VV+ – V

output low, R

= 2k 10 33 mV

L

= 600Ω,33mV

L

OUT

= 600Ω 33 mV

L

f = 10kHz 0.02 %

65 dB

50 mV

50 mV

mV

mV

nV Hz/

V+

December 1998 3 MIC7201