LMC7101_15 Datasheet, PDF (20/33 Pages) Texas Instruments – LMC7101, LMC7101Q-Q1 Tiny Low-Power Operational Amplifier With Rail-to-Rail Input and Output

LMC7101, LMC7101Q-Q1
SNOS719G – SEPTEMBER 1999 – REVISED SEPTEMBER 2015
7 Detailed Description
www.ti.com
7.1 Overview
The LMC7101 is a single channel, low-power operational amplifier available in a space-saving SOT-23 package,
offering rail-to-rail input and output operation across a wide range of power supply configurations. The
LMC7101Q-Q1 is the automotive Q-grade variant.
7.2 Functional Block Diagram
V+
IN– _–
IN+ ₊
OUT
V–
7.3 Feature Description
7.3.1 Benefits of the LMC7101 Tiny Amplifier
7.3.1.1 Size
The small footprint of the SOT-23-5 packaged tiny amplifier, (0.12 × 0.118 inches, 3.05 × 3 mm) saves space on
printed circuit boards, and enable the design of smaller electronic products. Because they are easier to carry,
many customers prefer smaller and lighter products.
7.3.1.2 Height
The 0.056 inches (1.43 mm) height of the tiny amplifier makes is suitable for use in a wide range of portable
applications in which a thin profile is required.
7.3.1.3 Signal Integrity
Signals can pick up noise between the signal source and the amplifier. By using a physically smaller amplifier
package, the tiny amplifier can be placed closer to the signal source, thus reducing noise pickup and increasing
signal integrity. The tiny amplifier can also be placed next to the signal destination, such as a buffer, for the
reference of an analog-to-digital converter.
7.3.1.4 Simplified Board Layout
The tiny amplifier can simplify board layout in several ways. Avoid long PCB traces by correctly placing amplifiers
instead of routing signals to a dual or quad device.
By using multiple tiny amplifiers instead of duals or quads, complex signal routing and possibly crosstalk can be
reduced.
7.3.1.5 Low THD
The high open-loop gain of the LMC7101 amp allows it to achieve very low audio distortion—typically 0.01% at
10 kHz with a 10-kΩ load at 5-V supplies. This makes the tiny amplifier an excellent for audio, modems, and low
frequency signal processing.
7.3.1.6 Low Supply Current
The typical 0.5-mA supply current of the LMC7101 extends battery life in portable applications, and may allow
the reduction of the size of batteries in some applications.
20
Submit Documentation Feedback
Copyright © 1999–2015, Texas Instruments Incorporated
Product Folder Links: LMC7101 LMC7101Q-Q1