LMP8100AEVAL National Semiconductor, LMP8100AEVAL Datasheet

LMP8100AEVAL

Manufacturer Part Number

LMP8100AEVAL

Description

BOARD EVALUATION FOR LMP8100

Manufacturer

National Semiconductor

Series

LMP®r

Datasheets

1.LMP8100AEVAL.pdf (30 pages)

2.LMP8100AEVAL.pdf (6 pages)

Specifications of LMP8100AEVAL

Channels Per Ic

1 - Single

Amplifier Type

Programmable Gain

Output Type

Single-Ended, Rail-to-Rail

Slew Rate

12 V/µs

Current - Output / Channel

20mA

Operating Temperature

-40°C ~ 125°C

Current - Supply (main Ic)

5.3mA

Voltage - Supply, Single/dual (±)

2.7 V ~ 5.5 V, ±1.35 V ~ 2.75 V

Board Type

Fully Populated

Utilized Ic / Part

LMP8100

Lead Free Status / RoHS Status

Not applicable / Not applicable

-3db Bandwidth

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551013037 - LMP8100

Evaluation Board User

Guide

This evaluation board contains the LMP8100, along with a

logic circuit to program the register in the LMP8100.

Connectors, Jumpers, Test Points

POWER SUPPLY

There are three banana plugs labeled GND, V

power the eval board. A single supply of +5V or a dual supply

of ±2.5V can be used.

SIGNAL CONNECTORS

There are three connectors for signals.

JUMPERS

The eval board has six jumpers.

TEST POINTS

The test points are connected as follows.

TP1 – +IN pin

TP2 – GRT pin

TP3 – SDO pin

TP4 – V

TP5 – SCK pin

TP6 – SDI pin

TP7 – CS pin

J1 is a BNC labeled V

J2 is a BNC labeled V

J3 is a 5-pin header that can be connected to a

JP1 connects the SCK pin of the LMP8100 to either the on-

JP2 connects the SDI pin of the LMP8100 to either the on-

JP3 connects the CS pin of the LMP8100 to either the on-

JP4 connects the V

JP5 connects the GRT pin of the LMP8100 to ground, a

JP6 connects the enable pin of the op amp used in the low-

microcontroller. A microcontroller can be used to write

the register of the LMP8100 if the logic circuitry on the

eval board is not used. See the Writing to the Register

Using a Microcontroller section.

board logic or to J3.

banana plug or to ground.

low-impedance DC source, or an AC ground. See the

Low-Impedance DC Source section.

impedance DC source to either +5V (enabled) or

ground (disabled).

OUT

−

pin of the LMP8100 to either the V

OUT

for the input signal.

for the output signal

300188

, and V

−

National Semiconductor

Application Note 1626

Mike Stout

October 16, 2008

Hardware Setup

POWER SUPPLY SETUP

GRT PIN SETUP

COMPONENTS

Various loads can be installed on the eval board. The series

resistance at R8 can be changed or replaced by a jumper.

The resistive load at R4 can be changed. An AC coupled load

can be added by using C24 and R9. A capacitive load can be

added at C4. The eval board with a jumper at R8 has between

6 and 7 pF of parasitic capacitance.

To use the on-board logic circuit to program the

LMP8100 Register connect the jumpers as follows:

JP1 – Pins 2 and 3

JP2 – Pins 2 and 3

JP3 – Pins 2 and 3

To use an external microcontroller to program the

LMP8100 Register connect the jumpers as follows:

JP1 – Pins 1 and 2

JP2 – Pins 1 and 2

JP3 – Pins 1 and 2

Connect the external microcontroller to J3.

+5V Supply

Connect the jumper as follows:

JP4 – GND and the center pin

Connect a +5V supply to the V

±2.5V Supply

Connect the jumper as follows:

JP4 – V

Connect a +2.5V supply to the V

supply to the V

GND banana plug.

To connect the GRT pin to ground

Connect the jumpers as follows:

JP5 – GND and the center pin

JP6 – GND and the center pin

To connect the GRT pin to a Low-Impedance Source

Connect the jumpers as follows:

JP5 – DC and the center pin

JP6 – V

To connect the GRT pin to an AC ground

Connect the jumpers as follows:

JP5 – AC GND and the center pin

JP6 – GND and the center pin

−

and the center pin

−

banana plug, and supply grounds to the

and GND banana plugs.

banana plug, a −2.5V

www.national.com

Related parts for LMP8100AEVAL

LMP8100AEVAL Summary of contents

Page 1

... TP2 – GRT pin TP3 – SDO pin TP4 – V pin OUT TP5 – SCK pin TP6 – SDI pin TP7 – CS pin © 2008 National Semiconductor Corporation National Semiconductor Application Note 1626 Mike Stout October 16, 2008 Hardware Setup REGISTER PROGRAMMING SETUP 1. ...

Page 2

Using the Board INPUT AND OUTPUT SIGNALS The input signal is connected to the LMP8100 using J1 (V The output signal is taken from J2 (V PROGRAMMING THE LP8100 The register in the LMP8100 can be programmed using switches SW1 ...

Page 3

Schematic 3 www.national.com ...

Page 4

Board Layout www.national.com FIGURE 2. Top Layout FIGURE 3. Bottom Layout 4 30018802 30018803 ...

Page 5

Notes 5 www.national.com ...

Page 6

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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