Texas Instruments Evaluation Board for High-Speed Single Op Amp in the 5- 6-Pin SC-70 Package LMH730165/NOPB LMH730165/NOPB Scheda Tecnica

December 4, 2008

The LMH730227, LMH730216 and LMH730165 evaluation
boards are designed to aid in the characterization of National
Semiconductor's High Speed monolithic amplifiers.
•

LMH730227 — SOIC packages

•

LMH730216 — SOT-23 packages

•

LMH730165 — SC-70 packges

Use the evaluation boards as a guide for high frequency lay-
out and as a tool to aid in device testing and characterization.
The evaluation boards accommodate general purpose am-
plifiers, as well as amplifiers with the following features:
•

Supply current adjustment via external Resistor

•

Output disable

The evaluation board schematic is shown below. Refer to the
product data sheets for recommendations for component val-
ues.

These boards have identical circuit configurations and are
designed to accommodate both non-inverting and inverting
operation. By changing RT or RIN and ROUT different input
and output impedances can be matched. The SMA connec-
tors and board traces are optimized for 50

Ω operation, how-

ever other impedances can be matched as shown below.

Inverting Gain = R

F

/R

G

 (Input Resistance = R

T

 || R

G

)

Non Inverting Gain = 1 + R

F

/(R

G

 + R

T

)

(Input Resistance = R

IN

)

(R

T

 may be set to zero for non inverting operation)

For current feedback operational amplifiers be careful to use
appropriate values of R

F

. In addition the required value of

R

G

 will limit choices for input impedance with Inverting gains.

20066601

© 2008 National Semiconductor Corporation

200666

www.national.com