Texas instruments TLV9001DPW-EVM User Manual

User's Guide

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TLV9001DPW-EVM

This user's guide contains support documentation for the TLV9001DPW evaluation module (EVM). Included in this document is a description of how to set up and configure the EVM, printed circuit board (PCB) layout, schematic, and bill of materials (BOM) of the TLV9001DPW EVM.

Contents

1 Introduction ................................................................................................................... 2

2 TLV9001DPW EVM Kit Contents.......................................................................................... 2

3 Circuit Configurations ....................................................................................................... 2

4 Schematic and PCB Layout................................................................................................ 3

5 Connections .................................................................................................................. 8

6 Bill of Materials and References........................................................................................... 8

List of Figures

1 TLV9001DPW EVM Schematic............................................................................................ 3

2 Silkscreen Schematic ....................................................................................................... 3

3 Difference Amplifier Schematic ............................................................................................ 4

4 Difference Amplifier Configured on TLV9001DPW EVM ............................................................... 4

5 Non-Inverting Amplifier Schematic ........................................................................................ 5

6 Non-Inverting Amplifier Configured on TLV9001DPW EVM ........................................................... 5

7 Inverting Amplifier Schematic.............................................................................................. 6

8 Inverting Amplifier Configured on TLV9001DPW EVM ................................................................. 6

9 Top Layer PCB Layout...................................................................................................... 7

10 Bottom Layer PCB Layout.................................................................................................. 7

List of Tables

1 TLV9001DPW EVM Kit Contents.......................................................................................... 2

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TLV9001DPW-EVM

Introduction

1 Introduction

The TLV9001 is a high-performance, low cost, low power operational amplifier. For a full list of electrical characteristics of the TLV9001, please refer to the TLV9001 product datasheet (SBOS833). This EVM is developed to give users the ability to easily evaluate their design concepts using the TLV9001. The EVM can be configured into three circuit configurations: difference amplifier, non-inverting amplifier and inverting amplifier by populating different components on board.

2 TLV9001DPW EVM Kit Contents

Table 1 details the contents included in the TLV9001DPW EVM kit.

Table 1. TLV9001DPW EVM Kit Contents

Item Description Quantity

TLV9001DPW EVM PCB 1

Header Strip

3 Circuit Configurations

By populating different components on the PCB, the TLV9001DPW EVM can be configured into three different circuits:

• Difference Amplifier

• Non-Inverting Amplifier

• Inverting Amplifier

100-mil (2.54-mm) spacing, 32 position,

through hole

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V+

VOUT

VREF

V-

234

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4 Schematic and PCB Layout

This section provides the schematic and PCB layout of the TLV9001DPW EVM. Also included are the schematics for the three TLV9001DPW EVM circuit configuration options.

4.1 Schematic

Figure 1 displays the circuit schematic of the TLV9001DPW EVM.

Schematic and PCB Layout

Figure 1. TLV9001DPW EVM Schematic

The schematic of the EVM is provided in silk screen located on the back of the PCB for easy reference.

Figure 2 displays the schematic provided on the back of the PCB.

Figure 2. Silkscreen Schematic

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V+

IN+

VOUT

VREF

V-

Schematic and PCB Layout

4.2 Difference Amplifier

Figure 3 displays the schematic for the difference amplifier circuit configuration.

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Figure 3. Difference Amplifier Schematic

Equation 1 displays the transfer function of the difference amplifier circuit configuration.

If R1 = R4 and R2 = R3, Equation 1 can simplify to Equation 2.

Capacitors C1 and C4 provide the option to filter the output of the amplifier. Equation 3 calculates the cutoff frequency, fc, of the filter.

Where

• R1 = R4, R2 = R3, and C1 = C4

Figure 4 displays the TLV9001DPW EVM populated with the required components to be configured as a

difference amplifier.

(1)

(2)

(3)

TLV9001DPW-EVM

Figure 4. Difference Amplifier Configured on TLV9001DPW EVM

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V+

IN+

VOUT

V-

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4.3 Non-Inverting Amplifier

Figure 5 displays the schematic for the non-inverting amplifier circuit configuration. To configure the EVM

in a non-inverting configuration short R3 using a 0-Ω resistor or solder bridge, leave R4 and C4 unpopulated, and ground the input connection IN–. The input signal is applied directly to the high impedance non-inverting input terminal using the IN+ connection on the EVM.

Schematic and PCB Layout

Figure 5. Non-Inverting Amplifier Schematic

Equation 4 displays the DC transfer function of the non-inverting amplifier circuit configuration shown in Figure 5.

Capacitor C1 provides the option to filter the output. The cutoff frequency, fc, of the filter can be calculated using Equation 5.

Figure 6 displays the TLV9001DPW EVM populated with the required components to be configured as a

non-inverting amplifier.

Figure 6. Non-Inverting Amplifier Configured on TLV9001DPW EVM

(4)

(5)

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V+

VOUT

V-

Vcm

Schematic and PCB Layout

4.4 Inverting Amplifier

Figure 7 shows the schematic for the inverting amplifier circuit configuration. To configure the EVM in an

inverting configuration short R3 using a 0-Ω resistor or solder bridge, leave R4 and C4 unpopulated, and apply the desired common mode voltage to the input connection, IN+. The input signal is applied using the input connection IN–.

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Figure 7. Inverting Amplifier Schematic

Equation 6 displays the DC transfer function of the inverting amplifier circuit configuration.

Capacitor C1 provides the option to filter the output. The cutoff frequency, fc, of the filter can be calculated using Equation 7.

Figure 8 shows the TLV9001DPW EVM populated with the required components to be configured as an

inverting amplifier.

Figure 8. Inverting Amplifier Configured on TLV9001DPW EVM

(6)

(7)

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4.5 PCB Layout

The TLV9001DPW EVM is a two layer board. The PCB layout of the top layer is displayed in Figure 9.

Schematic and PCB Layout

Figure 9. Top Layer PCB Layout

The PCB layout of the bottom layer is displayed in Figure 10.

Figure 10. Bottom Layer PCB Layout

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Connections

5 Connections

This section provides a description for each connection available on the EVM.

5.1 Power

The power supply connections for the TLV9001DPW EVM can only be applied using the header strips located at the top and bottom of the PCB. The positive power supply connection is labeled V+, the negative power supply connection is labeled V–, and the ground connection is labeled GND. For the minimum and maximum supply voltages of the TLV9001DPW EVM, please refer to the TLV9001 product datasheet (SBOS833).

5.2 Input Connections

Signals for the input can be applied to the TLV9001DPW EVM through the use of SMA connectors or the header pins. The input connections are labeled as IN+ and IN–.

5.3 Output Connections

Output connections are provided through the use of SMA connectors or the header pin labeled as VOUT.

5.4 Reference Voltage Connections

Signals or DC voltages for the reference voltage is applied to the TLV9001DPW EVM through the use of the SMA connector or header pin labeled VREF.

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6 Bill of Materials and References

6.1 Bill of Materials

Designator QTY Description Part Number

PCB 1 Printed-Circuit-Board TLV9001DPW EVM

Header Strips 2 Header, 100 mil, 4x1, Gold, TH TS-104-G-AA

6.2 References

1. DIYAMP-EVM

2. DUAL-DIYAMP-EVM

3. TI Precision Labs Training

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IMPORTANT NOTICE AND DISCLAIMER

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Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

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