Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp, differential amplifier Differential QFN 16 (3x3)

Measured3rdOrderIntermodulation

SpuriousSignalLevel

-120

-110

-100

-90

-80

-70

-60

0 50 100 150 200 250

f-Frequency-MHz

3rdOrderIntermodulationSpuriousLevel-dBc

250 W

0.1 Fm

250 W

+V =5V

10nF

Mini-Circuits

ADT2-1T

1:1.4

953 W

50 W

Mini-Circuits

ADT2-1T

1:1.4

= 20 dB

OUT

THS4509

OUT

THS4509

www.ti.com

SLOS454H –JANUARY 2005–REVISED NOVEMBER 2009

WIDEBAND, LOW-NOISE, LOW-DISTORTION, FULLY-DIFFERENTIAL AMPLIFIER

Check for Samples: THS4509

FEATURES

DESCRIPTION

• Fully-Differential Architecture

• Centered Input Common-Mode Range

The THS4509 is a wideband, fully-differential op amp

designed for 5-V data acquisition systems. It has a

• Output Common-Mode Control

low noise at 1.9 nV/√Hz, and low harmonic distortion

• Minimum Gain of 2 V/V (6 dB)

of –75 dBc HD

and –80 dBc HD

at 100 MHz with

• Bandwidth: 1900 MHz

2 V

, G = 10 dB, and 1 kΩ load. Slew rate is high at

6600 V/μs, and with settling time of 2 ns to 1% (2-V

• Slew Rate: 6600 V/μs

step), it is ideal for pulsed applications. It is designed

• 1% Settling Time: 2 ns

for a minimum gain of 6 dB, but is optimized for gains

• HD

: –75 dBc at 100 MHz

of 10 dB.

• HD

: –80 dBc at 100 MHz

To allow for dc coupling to analog-to-digital

• OIP

: 37 dBm at 70 MHz

converters (ADCs), its unique output common-mode

control circuit maintains the output common-mode

• Input Voltage Noise: 1.9 nV/√Hz (f > 10 MHz)

voltage within 3-mV offset (typ) from the set voltage,

• Power-Supply Voltage: 3 V to 5 V

when set within 0.5-V of midsupply, with less than

• Power-Supply Current: 37.7 mA

4-mV differential offset voltage. The common-mode

set point is set to midsupply by internal circuitry,

• Power-Down Current: 0.65 mA

which may be overdriven from an external source.

APPLICATIONS

The input and output are optimized for best

• 5-V Data Acquisition Systems High performance with the common-mode voltages set to

Linearity ADC Amplifiers midsupply. Along with high performance at low

power-supply voltage, this design makes it ideal for

• Wireless Communication

high-performance, single-supply 5-V data acquisition

• Medical Imaging

systems. The combined performance of the THS4509

• Test and Measurement

in a gain of 10 dB driving the ADS5500 ADC,

sampling at 125 MSPS, is 81-dBc SFDR and

69.1-dBc SNR with a –1 dBFS signal at 70 MHz.

The THS4509 is offered in a quad, leadless QFN-16

package (RGT), and is characterized for operation

over the full industrial temperature range from –40°C

to +85°C.

Summary of content (42 pages)

PAGE 1
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 WIDEBAND, LOW-NOISE, LOW-DISTORTION, FULLY-DIFFERENTIAL AMPLIFIER Check for Samples: THS4509 FEATURES 1 • • • • • • • • • • • • • • 23 DESCRIPTION Fully-Differential Architecture Centered Input Common-Mode Range Output Common-Mode Control Minimum Gain of 2 V/V (6 dB) Bandwidth: 1900 MHz Slew Rate: 6600 V/μs 1% Settling Time: 2 ns HD2: –75 dBc at 100 MHz HD3: –80 dBc at 100 MHz OIP3: 37 dBm at 70 MHz Input Voltage Noise: 1.
PAGE 2
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 DEVICE INFORMATION TOP VIEW RGT Package THS4509 VS− 16 15 14 13 NC 1 12 PD VIN− 2 11 VIN+ VOUT+ 3 10 VOUT− CM 4 9 5 6 7 CM 8 VS+ TERMINAL FUNCTIONS TERMINAL (RGT PACKAGE) NO.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com ELECTRICAL CHARACTERISTICS: VS+ – VS– = 5 V Test conditions are at VS+ = +2.5 V, VS– = –2.5 V, G = 10 dB, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, TA = +25°C, single-ended input, differential output, and input and output referenced to midsupply, unless otherwise noted. THS4509 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL (1) AC PERFORMANCE G = 6 dB, VO = 100 mVPP Small-signal bandwidth 2.
PAGE 5
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 ELECTRICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions are at VS+ = +2.5 V, VS– = –2.5 V, G = 10 dB, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, TA = +25°C, single-ended input, differential output, and input and output referenced to midsupply, unless otherwise noted. THS4509 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL (1) INPUT Common-mode input range high 1.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com ELECTRICAL CHARACTERISTICS: VS+ – VS– = 3 V Test conditions at VS+ = +1.5 V, VS– = –1.5 V, G = 10 dB, CM = open, VO = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, TA = +25°C, single-ended input, differential output, and input and output referenced to midsupply, unless otherwise noted. THS4509 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL (1) AC PERFORMANCE G = 6 dB, VO = 100 mVPP Small-signal bandwidth 1.
PAGE 7
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 ELECTRICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, G = 10 dB, CM = open, VO = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, TA = +25°C, single-ended input, differential output, and input and output referenced to midsupply, unless otherwise noted. THS4509 PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TEST LEVEL (1) INPUT Common-mode input range high 0.4 Common-mode input range low –0.
PAGE 8
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.
PAGE 9
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 10
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 11
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 12
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 13
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted. SETTLING TIME REJECTION RATIO vs FREQUENCY 5 100 VOD = 2 Vstep 4 90 PSRR− 80 Rejection Ratio −dB 2 1 0 −1 −2 60 CMRR 50 40 30 −3 20 −4 10 −5 0 0.
PAGE 14
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted. INPUT OFFSET VOLTAGE vs INPUT COMMON-MODE VOLTAGE TURN-ON TIME 5 4 1.6 PD 1.2 3 0.8 2 Output 0.
PAGE 15
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 16
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 5 V (continued) Test conditions at VS+ = +2.5 V, VS– = –2.5V, CM = open, VO = 2 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted. OUTPUT COMMON-MODE OFFSET vs CM INPUT VOLTAGE 50 Output Common−Mode Offset − mV 40 30 20 10 0 −10 −20 −30 −40 −50 −2.5 −2 −1.5 −1 −0.5 0 0.5 1 1.5 2 2.
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THS4509 www.ti.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 19
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 20
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 21
THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted. TRANSITION RATE vs OUTPUT VOLTAGE TRANSIENT RESPONSE 4000 VOD − Differential Output Voltage - V 0.6 Rising 3000 2500 Falling 2000 1500 1000 500 0 0 0.2 1.4 1 1.2 0.4 0.6 0.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted. OUTPUT IMPEDANCE vs FREQUENCY TURN-OFF TIME 3 1 10 1 2.5 0.8 Output 1.5 0.4 PD 1 0.2 0.5 0 0.1 0.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 TYPICAL CHARACTERISTICS: VS+ – VS– = 3 V (continued) Test conditions at VS+ = +1.5 V, VS– = –1.5 V, CM = open, VOD = 1 VPP, RF = 349 Ω, RL = 200-Ω differential, G = 10 dB, single-ended input, and input and output referenced to midrail, unless otherwise noted.
PAGE 24
THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com TEST CIRCUITS The THS4509 is tested with the following test circuits built on the evaluation module (EVM). For simplicity, power-supply decoupling is not shown—see the Layout Recommendations in the Applications section for recommendations. Depending on the test conditions, component values are changed per the following tables, or as otherwise noted. The signal generators used are ac-coupled, 50-Ω sources, and a 0.22-μF capacitor and 49.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 A signal generator is used as the signal source and the output is measured with a spectrum analyzer. The output impedance of the signal generator is 50 Ω. RIT and RG are chosen to impedance-match to 50 Ω, and to maintain the proper gain. To balance the amplifier, a 0.22-μF capacitor and 49.9-Ω resistor to ground are inserted across RIT on the alternate input.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com APPLICATION INFORMATION APPLICATIONS The following circuits show application information for the THS4509. For simplicity, power-supply decoupling capacitors are not shown in these diagrams. Please see the THS4509 EVM section for recommendations. For more detail on the use and operation of fully-differential op amps refer to the application report, Fully-Differential Amplifiers (SLOA054).
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 Setting the Output Common-Mode Voltage The output common-mode voltage is set by the voltage at the CM pin(s). The internal common-mode control circuit maintains the output common-mode voltage within 3-mV offset (typ) from the set voltage, when set within 0.5 V of midsupply, with less than 4-mV differential offset voltage.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com Table 3 is a modification of Table 1 to add the proper values with RPU assuming a 50-Ω source impedance and setting the input and output common-mode voltage to midsupply. Table 3. RPU Values for Various Gains GAIN RF RG RIT RPU 6 dB 348 Ω 169 Ω 64.9 Ω 200 Ω 10 dB 348 Ω 102 Ω 78.7 Ω 133 Ω 14 dB 348 Ω 61.9 Ω 115 Ω 97.6 Ω 20 dB 348 Ω 40.2 Ω 221 Ω 80.6 Ω There are two drawbacks to this configuration.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 Figure 89 shows the two-tone FFT of the THS4509 and ADS5500 circuit with 65-MHz and 70-MHz input frequencies. The SFDR is 90 dBc. From 50-W source V IN 348 W 100 W 69 .8 W 5V 225 W 0.22 mF 100 49 .9 W 0.22 mF 69 .8 W THS4509 225 W 2 .7 pF CM 0.22 mF 348 W 14-bit, 105 MSPS A IN+ ADS 5424 A IN– VBG 49.9 W 0.1 mF 0.1 mF Figure 90. THS4509 and ADS5424 Circuit Figure 89.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com Layout Recommendations It is recommended to follow the layout of the external components near the amplifier, ground plane construction, and power routing of the EVM as closely as possible. General guidelines are: 1. Signal routing should be direct and as short as possible into and out of the op amp circuit. 2. The feedback path should be short and direct; avoid vias. 3.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 PowerPAD PCB LAYOUT CONSIDERATIONS Although there are many ways to properly heatsink the PowerPAD package, the following steps illustrate the recommended approach. 0.144 0.049 0.012 Pin 1 0.0095 0.015 0.144 0.0195 0.0705 0.010 vias 0.032 0.030 0.0245 Top View Figure 93. PowerPAD PCB Etch and Via Pattern 1. Prepare the PCB with a top side etch pattern as shown in Figure 93.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com THS4509 EVM Figure 94 is the THS4509 EVAL1 EVM schematic; layers 1 through 4 of the PCB are shown Figure 95, and Table 4 is the bill of materials for the EVM as supplied from TI. GND VS− J4 VS+ J5 J6 VEE 0.1 µF TP1 C9 C10 0.1 µF VCC 10 µF C4 10 µF J1 C15 R12 49.9 Ω 0.22 µF J2 12 3 VO+ − U1 11 + R4 4 VO− PwrPad 10 R7 86.6 Ω R8 86.6 Ω Vocm 100 Ω 9 R2 69.8 Ω 15 13 14 16 VEE R6 J3 T1 R11 69.
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THS4509 www.ti.com SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 Table 4. THS4509 EVAL1 EVM Bill of Materials ITEM DESCRIPTION SMD SIZE REFERENCE DESIGNATOR PCB QTY MANUFACTURER PART NUMBER 1 CAP, 10.0 μF, Ceramic, X5R, 6.3 V 0805 C3-C6 4 (AVX) 08056D106KAT2A 2 CAP, 0.1 μF, Ceramic, X5R, 10 V 0402 C9-C14 6 (AVX) 0402ZD104KAT2A 3 CAP, 0.22 μF, Ceramic, X5R, 6.3 V 0402 C15 1 (AVX) 04026D224KAT2A 4 OPEN 0402 C1, C2, C7, C8 4 5 OPEN 0402 R9, R10 2 6 Resistor, 49.
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THS4509 SLOS454H – JANUARY 2005 – REVISED NOVEMBER 2009 www.ti.com REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision G (May 2008) to Revision H Page • Changed title of Typical Characteristics: VS+ – VS– = 5 V ..................................................................................................... 8 • Deleted conditions from Typical Characteristics: VS+ – VS– = 5 V table of graphs .........................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant THS4509RGTR QFN RGT 16 3000 330.0 12.4 3.3 3.3 1.1 8.0 12.0 Q2 THS4509RGTT QFN RGT 16 250 180.0 12.4 3.3 3.3 1.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) THS4509RGTR QFN RGT 16 3000 367.0 367.0 35.0 THS4509RGTT QFN RGT 16 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.