Texas Instruments THS7001 User manual

THS7001
ProgrammableĆGain Amplifier
Evaluation Module
December 1999 Mixed-Signal Products
User’s Guide
SLOU057

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Copyright 1999, Texas Instruments Incorporated

iii
Chapter Title—Attribute Reference
Preface
Related Documentation From Texas Instruments
J THS7001 Programmable-Gain Amplifier (literature number
SLOS214) This is the data sheet for the THS7001 amplifier
integrated circuit used on the EVM.
J PowerPAD  Thermally Enhanced Package (literature number
SLMA002) This is the technical brief for the special PowerPAD
package in which the THS7001 amplifier IC is supplied.
FCC Warning
This equipment is intended for use in a laboratory test environment only. It
generates, uses, and can radiate radio frequency energy and has not been
testedforcompliancewiththelimitsofcomputingdevicespursuanttosubpart
Jofpart 15ofFCCrules,which aredesignedtoprovidereasonableprotection
against radio frequency interference. Operation of this equipment in other
environments may cause interference with radio communications, in which
case the user at his own expense will be required to take whatever measures
may be required to correct this interference.
Trademarks
TI is a trademark of Texas Instruments Incorporated.
PowerPAD is a trademark of Texas Instruments Incorporated.

iv

Running Title—Attribute Reference
v
Chapter Title—Attribute Reference
Contents
1 General Information 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Programmable Gain Amplifier Gain Control 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 EVM DIP Switch Functionality 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 EVM Circuit Configuration 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Using The THS7001 EVM 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 THS7001 EVM Performance 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 General High-Speed Amplifier Design Considerations 1-14. . . . . . . . . . . . . . . . . . . . . . . . . .
1.9 General PowerPAD t Design Considerations 1-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.10 THS7001 EVM Specifications 1-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Reference 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 THS7001 Programmable-Gain Amplifier EVM Parts List 2-2. . . . . . . . . . . . . . . . . . . . . . . . .
2.2 THS7001 EVM Board Layouts 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference
vi
Figures
1–1 THS7001 Evaluation Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 THS7001 EVM Schematic Diagram 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3 Simplified PGA Section of the THS7001 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–4 THS7001 Evaluation Module Block Diagram 1-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–5 THS7001 EVM Preamplifier Response, VCC = ±15 V 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–6 THS7001 EVM Preamplifier Response, VCC = ±5 V 1-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–7 THS7001 EVM PGA Response, VCC = ±15 V 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–8 THS7001 EVM PGA Response, VCC = ±5 V 1-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–9 THS7001 EVM Preamplifier + PGA Response, VCC = ±15 V 1-13. . . . . . . . . . . . . . . . . . . . . .
1–10 THS7001 EVM Preamplifier + PGA Response, VCC = ±5 V 1-13. . . . . . . . . . . . . . . . . . . . . . .
1–11 PowerPAD PCB Etch and Via Pattern 1-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–12 Maximum Power Dissipation vs. Free-Air Temperature 1-16. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 THS7001 EVM PC Board: Top Assembly 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–2 THS7001 EVM PC Board: Top Layer 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–3 THS7001 EVM PC Board: Bottom Layer 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tables
1–1 THS7001 EVM PGA Nominal Gain/Attenuation 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–2 EVM DIP Switch Functionality 1-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–3 THS7001 EVM Jumper Settings 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1–4 THS7001 EVM DIP Switch Settings 1-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2–1 THS7001 Programmable-Gain Amplifier EVM Parts List 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1
General Information
General
Information
This chapter details the Texas Instruments (TI) THS7001
programmable-gainamplifierevaluationmodule(EVM),SLOP250.Itincludes
a list of EVM features, a brief description of the module illustrated with a
pictorial and schematic diagrams, EVM specifications, details on configuring,
connecting,andusingtheEVM,andadiscussiononhigh-speedamplifier and
PowerPAD package design considerations.
Topic Page
1.1 Features 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Description 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Programmable Gain Amplifier Gain Control 1–6. . . . . . . . . . . . . . . . . . . . .
1.4 EVM DIP Switch Functionality 1–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 EVM CIrcuit Configuration 1–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6 Using the THS7001 EVM 1–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.7 THS7001 EVM Performance 1–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.8 General High-Speed Amplifier Design Considerations 1–14. . . . . . . . .
1.9 General PowerPADDesign Considerations 1–15. . . . . . . . . . . . . . . . . .
1.10 THS7001 EVM Specifications 1–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1

Features
1-2
General Information
1.1 Features
THS7001 programmable-gain amplifier EVM features include:
J Multiple Input Configurations Set Via On Board Jumpers
J DIP Switches Allow Quick and Easy Adjustment of Gain, Shut Down,
Reference Voltage, and Output Clamping
J Standard BNC Connector Inputs and Outputs
J ±5-V to ±15-V Operation With 5-V Reference Input
J Nominal 50-ΩImpedance Inputs and Outputs
J Includes Test Points for Easy Digital Control of EVM Circuit Gain and
Operating Parameters
J Good Example of PowerPAD Package and High-Speed Amplifier
Design and Layout
1.2 Description
The TI THS7001 programmable-gain amplifier evaluation module (EVM) is a
complete low-noise receiver and a highly configurable programmable-gain
amplifiercircuit.ItconsistsoftheTITHS7001programmable-gainamplifierIC
and a number of passive parts, all mounted on a multilayer circuit board
(Figure 1–1).
Although the THS7001 IC was developed primarily for xDSL receiver
front-ends, a large number of different circuits can benefit from the many
features incorporated into the THS7001. This EVM illustrates a universal
design and can be used for numerous system configurations.
The EVM uses standard BNC connectors for inputs and outputs and also
includes test points for user connections and testing. It is completely
assembled, fully tested, and ready to use—just connect it to power, a signal
source, and a load (if desired).

Description
1-3
General Information
Figure 1–1.THS7001 Evaluation Module
PGA – A
Output
C21L2C5C4L1
+VCC GND +5 V–VCC
Pre-AmpA
Output
JP3
J9
C15
R9
Input
J6
J5
R24
R26
R28
R30
R32
C18, C10
C19, C9
R42
R44
R18 R5
U1
G2
(3)
G1
(2)
G0
(1)
S1
VH
S/D
(4)
AVREF
(5)
VL
(6)
C17
JP1
R6
C6
R20
C7
C12
R2
R41
R23
R25
R27
R29
R31
JP2
C8
1999
Texas Instruments
J4J3
J2
J1
SLOP250 THS7001 EVM Board
+++
R8
GND
1
R7
C1
C3
R1
A
C13
C14
InputpowerisappliedtotheEVMthroughbananajacksJ1,J2,J3, and J4. An
LCfilteroneachpowerbusisolatestheEVMcircuitsfromtheexternalsupply.
J4 provides a reference point for numerous circuit functions and draws
relativelylittlecurrent.TheschematicfortheEVMamplifiersappearsinFigure
1–2.

Description
1-4
General Information
R9 49.9 Ω
J6
Input A 3
2
JP2
+ –
5
64
R1 TBD
R2
TBD
C3
TBD
C8, TBD
R8
499 Ω
R7
499 Ω
3 2
1
R5
49.9 ΩJ5
Pre-amp A Output
JP1
C6, TBD
R6
0 Ω
R20
TBD C17
TBD
G2
G1
G0
VREF
SID
–Vcc VCC
VH
VL
VO
GND
VIN
18
20
13
19
C18, 0.1 µF–15 V
17
14
R29 330 ΩR18
49.9 Ω
R30
3.3 kΩ
5 V
S1:D S1:E
VREF TP8
S/D
TP7
C19, 0.1 µF
+15 V
R23, 330Ω
R25, 330Ω
R27, 330Ω
R24, 3.3 kΩ R26, 3.3 kΩ R28, 3.3 kΩ3
2
1
TP5
VH
R41
49.9 ΩR42
4.7 kΩ
R31
49.9 ΩR32
4.7 kΩ
R44
100 ΩJ9
PGA-A Output
VL
TP6
S1:F
–15 V
5 V+15 VJP3
G2, TP3
C17, 0.1 µF
5 V
12 16
15
3
2
1
TP2, G0 TP4, G1
U1:B
Figure 1–2.THS7001 EVM Schematic Diagram
–15 V
L1
0.22 µHC4
6.8 µF
+15 V
J1
+VCC
+
J2
GND
+
J3
–VCC
+
J4
+5 V
5 V
L2
0.22 µH
C5
6.8 µFC21
6.8 µF
TP1
C13
0.1 µFC14
0.1 µF
1
C11
0.1 µF
C12
0.1 µF
+15 V
–15 V
U1:A
PREAMPLIFIER
S1:A
S1:B
S1:C
C15
0.1 µF
C9, 0.1 µF
C10, 0.1 µF
PGA
7
8