TI THS4531DGKEVM

User's Guide
SLOU334 – January 2012
THS4531DGKEVM Evaluation Module
The THS4531DGKEVM is an evaluation module for the single THS4531 amplifier in the DGK [8-lead
VSSOP (MSOP)] package. This evaluation module is designed to quickly and easily demonstrate the
functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test
instruments through the use of onboard connectors. The EVM comes configured for easy connection with
common 50-Ω laboratory equipment on its inputs and outputs. The amplifier is configured for single-ended
input with gain of 1 V/V to differential output at the device pins, which is converted to single-ended via a
transformer to the output. It can be easily configured for other functions, gains, and single- or split-supply
operation.
Contents
Features ......................................................................................................................
EVM Specifications .........................................................................................................
Power Connections .........................................................................................................
3.1
Split-Supply Operation ............................................................................................
3.2
Single-Supply Operation ..........................................................................................
Input and Output Connections ............................................................................................
THS4531DGKEVM Schematic, Layout, and Bill of Materials .........................................................
5.1
Schematic ...........................................................................................................
5.2
THS4531DGKEVM Layers .......................................................................................
5.3
Bill of Materials .....................................................................................................
1
2
3
4
5
1
1
2
2
2
2
3
3
4
5
List of Figures
1
THS4531DGKEVM Schematic ............................................................................................ 3
2
THS4531DGKEVM Layers 1 Through 4 ................................................................................. 4
List of Tables
THS4531DGKEVM Bill of Materials ...................................................................................... 5
1
1
Features
•
•
•
•
2
Configured for split-supply operation and easily modified for single supply
Default gain of 1 configuration can easily be reconfigured for other gains
Designed for easy connection to standard 50-Ω input/output impedance test equipment
Inputs and outputs include SMA connectors
EVM Specifications
Single-supply voltage range (VS– = ground)
2.5 V to 5.5 V
VS±
Split-supply voltage range
±1.25 V to ±2.75 V
IS±
Supply current
250 µA
Input voltage
VS±, Max
Output drive
±25 mA
IOUT
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1
Power Connections
3
www.ti.com
Power Connections
The THS4531DGKEVM is equipped with banana jacks for easy connection of power. The positive supply
input is labeled VS+. The negative supply input is labeled VS–. Ground is labeled GND.
3.1
Split-Supply Operation
To operate as split supply, apply the positive supply voltage to VS+, negative supply voltage to VS– , and
the ground reference from supply to GND.
3.2
Single-Supply Operation
To operate as single supply, connect jumper VS– to GND, and apply the positive supply voltage to VS+.
Inputs and outputs must be biased per data-sheet specifications for proper operation.
4
Input and Output Connections
The THS4531DGKEVM is equipped with SMA connectors for easy connection of signal generators and
analysis equipment. As shipped, the EVM is configured for a gain of 1, split supply, single-ended input and
output with 50-Ω termination. For best results, signals must be routed to and from the EVM with cables
having 50-Ω characteristic impedance. VIN+ (J2) is the input connector for single-ended input signals. VOUT+
(J10) is the output connector for single-ended output signals. VIN- (J1) is not intended for use with
single-ended input signals and has C1 and R6 added to approximate the impedance of an ac-coupled
50-Ω source and to balance the amplifier when VIN+ is driven from an ac-coupled, 50-Ω source. The
amplifier converts the single-ended input to a differential signal at its output pins. A resistor network (R20,
R21, R24) and transformer on the amplifier's output convert the differential signal to single-ended,
provides 2-kΩ load to the amplifier when terminated in 50 Ω, and 50-Ω line impedance match at VOUT+.
This results in loss, and the overall gain is approximately –38 dB. See the following THS4531 data-sheet
applications section, schematics, and layouts for more detail and how to reconfigure the EVM.
2
THS4531DGKEVM Evaluation Module
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THS4531DGKEVM Schematic, Layout, and Bill of Materials
5
THS4531DGKEVM Schematic, Layout, and Bill of Materials
5.1
Schematic
Figure 1. THS4531DGKEVM Schematic
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THS4531DGKEVM Schematic, Layout, and Bill of Materials
5.2
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THS4531DGKEVM Layers
(a) Top Layer 1
(b) Ground Layer 2
(c) Ground Layer 3
(d) Bottom Layer 4
Figure 2. THS4531DGKEVM Layers 1 Through 4
4
THS4531DGKEVM Evaluation Module
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5.3
Bill of Materials
Table 1. THS4531DGKEVM Bill of Materials
Item
Description
SMD Size
Reference Designator
PCB Qty.
Manufacturer's Part No.
1
CAP, 10.0uF, CERAMIC, X5R, 16V
0805
C7, C10
2
(AVX) 0805YD106KAT2A
2
CAP, 0.1uF, CERAMIC, X7R, 16V
0603
C3, C4, C6, C11
4
(AVX) 0603YC104KAT2A
3
CAP, 0.22uF, CERAMIC, X7R, 10V
0603
C1
1
(AVX) 0603ZC224KAT2A
4
OPEN
0603
C2, C5, C12
3
5
OPEN
0805
C8, C9
2
6
OPEN
0603
R1, R2, R3, R7, R8, R9, R14, R15,
R22, R23, R25, R26, R27, R30
13
7
RESISTOR, 0 OHM
0603
R28, R29
2
(ROHM) MCR03EZPJ000
8
RESISTOR, 49.9 OHM, 1/10W, 1%
0603
R6
1
(ROHM) MCR03EZPFX49R9
9
RESISTOR, 51.1 OHM, 1/10W, 1%
0603
R10, R11, R24
3
(ROHM) MCR03EZPFX51R1
10
RESISTOR, 976 OHM, 1/10W, 1%
0603
R20, R21
2
(ROHM) MCR03EZPFX9760
11
RESISTOR, 2K OHM, 1/10W, 1%
0603
R12, R13, R16, R17
4
(ROHM) MCR03EZPFX2001
12
RESISTOR, 10K OHM, 1/10W, 1%
0603
R18, R19
2
(ROHM) MCR03EZPFX1002
13
RESISTOR, 0 OHM
0805
R4, R5
2
(ROHM) MCR10EZPJ000
14
OPEN
T1
1
15
TRANSFORMER, RF
T2
1
(MINI-CIRCUITS) ADT1-1WT+
16
JACK, BANANA RECEPTANCE, 0.25" DIA. HOLE
J7, J8, J9
3
(SPC) 15459
17
OPEN
J1, J3, J4, J5, J6, J11
6
18
CONNECTOR, EDGE, SMA PCB JACK
J2, J10
2
(JOHNSON) 142-0701-801
19
HEADER, 0.1" CTRS, 0.025" SQ. PINS
JP1
1
(SULLINS) PBC36SAAN
20
SHUNTS
JP1
1
(SULLINS) SSC02SYAN
21
TEST POINT, RED
TP1
1
(KEYSTONE) 5000
22
TEST POINT, BLACK
TP2, TP3
2
(KEYSTONE) 5001
23
IC, THS4531
U1
1
(TI) THS4531IDGK
24
STANDOFF, 4-40 HEX, 0.625" LENGTH
4
(KEYSTONE) 1808
25
SCREW, PHILLIPS, 4-40, 0.250"
4
PMSSS 440 0025 PH
26
BOARD, PRINTED CIRCUIT
1
(TI) EDGE# 6528462 REV.A
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3 POS.
THS4531DGKEVM Evaluation Module
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5
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EVM Warnings and Restrictions
It is important to operate this EVM within the input voltage range of 2.5 V to 5.5 V and the output voltage range of 2.5 V to 5.5 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
questions concerning the input range, please contact a TI field representative prior to connecting the input power.
Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the
EVM. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load
specification, please contact a TI field representative.
During normal operation, some circuit components may have case temperatures greater than 85°C. The EVM is designed to
operate properly with certain components above 85°C as long as the input and output ranges are maintained. These components
include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of
devices can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near
these devices during operation, please be aware that these devices may be very warm to the touch.
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