Datasheet

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  

SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D High Output Current Differential

Drive . . . >200 mA

D Rail-To-Rail Output

D Unity-Gain Bandwidth . . . 2.4 MHz

D Slew Rate . . . 1.5 V/µs

D Supply Current . . . 1.4 mA

D Supply Voltage Range . . . 2.7 V to 5.5 V

D Specified Temperature Range:

− T

= −40°C to 85°C . . . Industrial Grade

description

The TLV4120 single supply operational differential amplifier provides a differential output current in excess of

200 mA at 5 V. This enables the amplifier to be used as high current line drivers, buffers, or coil driver

applications. The TLV4120 has a shutdown feature that reduces the supply current down to 6 µA when the

amplifier is not active in the application.

The TLV4120 is available in the ultrasmall MSOP PowerPAD package, which offers the exceptional thermal

impedance required for amplifiers delivering high current levels.

AVAILABLE OPTIONS

DEVICE

NUMBER OF

PACKAGE TYPES

SYMBOL

SHUTDOWN

DEVICE

NUMBER OF

CHANNELS

MSOP (DGN)

†

SYMBOL

SHUTDOWN

−40°C to 85°C TLV4120 1 TLV4120IDGN xxTIAHU Yes

†

This package is available taped and reeled. To order this packaging option, add an R suffix to the part number (e.g.,

TLV4120IDGNR).

functional block diagram

Bias

Control

IN −

SHDN

−8

GND

3 IN+

−

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

SHDN

IN+

IN−

−

GND

DGN PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.

Summary of content (26 pages)

PAGE 1
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 D High Output Current Differential D D D D D D DGN PACKAGE (TOP VIEW) Drive . . . >200 mA Rail-To-Rail Output Unity-Gain Bandwidth . . . 2.4 MHz Slew Rate . . . 1.5 V/µs Supply Current . . . 1.4 mA Supply Voltage Range . . . 2.7 V to 5.5 V Specified Temperature Range: − TA = −40°C to 85°C . . .
PAGE 2
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Differential input voltage, VID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 electrical characteristics at recommend operating conditions, VDD = 2.7 V and 5 V (unless otherwise noted) dc performance PARAMETER VIO CMRR AVD Input offset voltage Common-mode rejection ratio Large-signal differential voltage amplification TEST CONDITIONS VIC = VDD/2, VO = VDD/2 , RS = 50 Ω VDD = 2.7 V, RS = 50 Ω VIC = 0.5 to 2.2 V, VDD = 5 V, RS = 50 Ω VIC = 0.
PAGE 4
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 electrical characteristics at specified free-air temperature, VDD = 2.7 V and 5 V (unless otherwise noted) (continued) output characteristics PARAMETER TA† 25°C MIN TYP 2.6 2.67 IOH = −10 mA Full range 2.58 25°C 2.35 IOH =−100 mA Full range 2.3 TEST CONDITIONS VDD = 2.7 V, VIC = VDD/2 VOH High-level output voltage VDD = 5 V, VIC = VDD/2 25°C 4.
PAGE 5
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 electrical characteristics at specified free-air temperature, VDD = 2.7 V and 5 V (unless otherwise noted) (continued) dynamic performance PARAMETER GBWP SR φM TA† 25°C MIN TYP 25°C 0.75 1.48 Full range 0.5 25°C 0.9 VDD = 5 V Full range 0.
PAGE 6
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS HIGH-LEVEL OUTPUT VOLTAGE vs HIGH-LEVEL OUTPUT CURRENT LOW-LEVEL OUTPUT VOLTAGE vs LOW-LEVEL OUTPUT CURRENT 2.7 2.1 1.8 1.5 1.2 0.9 TA = 25°C TA = 0°C TA = −40°C 0.6 0.3 TA = 85°C 0.0 5.00 VO = Positive & Negative VDD = 2.7 V 2.4 2.1 TA = 85°C 1.8 TA = 25°C TA = 0°C TA = −40°C 1.5 1.2 0.9 0.6 0.3 0.
PAGE 7
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS PHASE MARGIN vs CAPACITIVE LOAD 80 180 80 70 150 70 60 120 50 90 40 60 30 30 10 0 −10 1k 0 VDD = 2.7 V & 5 V, AV = Open Loop, RL = 100 Ω, CL = 10 pF, TA = 25°C 10 k Phase Margin − ° 20 60 Phase − ° 30 VDD = 2.
PAGE 8
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 TYPICAL CHARACTERISTICS INVERTING SMALL-SIGNAL PULSE RESPONSE vs TIME VDD = 5 V RL = 100 Ω CL = 50 pF AV = −1 TA = 25°C 0 −0.05 −0.10 2.55 2.45 VO+ 2.40 0 10 20 30 40 50 60 70 80 90 VIN = Bypass Voltage (VDD/2) 1 µF Cap on Bypass AV = 1 RL = Open Shutdown = VDD 3.5 3.0 2.5 2.0 1.5 1.0 VDD = 5 V 0.5 0.0 VDD = 2.7 V −0.5 −1.
PAGE 9
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION differential output drive The TLV4120 is two amplifiers arranged to produce high output current differential drive. The first amplifier, A1, is an operational amplifier, with both inputs uncommitted. This enables the first amplifier to be configured as an inverting amplifier, a noninverting amplifier, or even a difference amplifier.
PAGE 10
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION Figure 20 shows the TLV4120 amplifier driving both ends of the load. There are several potential benefits to this differential drive configuration but initially consider power to the load. The differential drive to the load means that as one side is slewing up, the other side is slewing down, and vice versa.
PAGE 11
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION gain setting resistors, RF and RS The differential gain for the TLV4120, with A1 configured as an inverter, is set by resistors RF and RS using the following equation: ǒ Ǔ R DiffGain + –2 R F S The differential gain for the TLV4120, with A1 in a noninverting configuration, is set by resistors RF and RS using the following equation: DiffGain + 2 ǒ 1)
PAGE 12
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION VDD/2 bypass capacitor, CB The VDD/2 bypass capacitor, CB, is the most critical capacitor and serves several important functions. During start-up or recovery from shutdown mode, CB determines the rate at which the amplifier starts up. The second function is to reduce noise produced by the power supply caused by coupling into the output drive signal.
PAGE 13
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION driving a capacitive load When the amplifier is used to drive heavy capacitive loads, the device’s phase margin will be reduced which could lead to high frequency ringing or oscillations. The TLV4120’s high current drive capability reduces this possibility.
PAGE 14
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION offset voltage (continued) The differential nature of the TLV4120 means that both amplifiers must be considered together to calculate the differential output offset voltage (VDOO) (see Figure 24). The VOO of amplifier A1 will be inverted by amplifier A2.
PAGE 15
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION general power design considerations When driving heavy loads at high junction temperatures there is an increased probability of electromigration affecting the long term reliability of ICs. Therefore for this not to be an issue: D The output current must be limited (at these high junction temperatures) or D The junction temperature must be limited.
PAGE 16
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION general PowerPAD design considerations The TLV4120 is available in a thermally-enhanced PowerPAD package. This package is constructed using a downset leadframe upon which the die is mounted [see Figure 25(a) and Figure 25(b)]. This arrangement results in the lead frame being exposed as a thermal pad on the underside of the package [see Figure 25(c)].
PAGE 17
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION Although there are many ways to properly heatsink the PowerPAD package, the following steps illustrate the recommended approach. general PowerPAD design considerations (continued) 1. The thermal pad must be connected to the same voltage potential as the device GND pin. 2.
PAGE 18
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006 APPLICATION INFORMATION general PowerPAD design considerations (continued) MAXIMUM POWER DISSIPATION vs FREE-AIR TEMPERATURE 4 TJ = 150°C Maximum Power Dissipation − W 3.5 3 2.5 2 DGN Package Low-K Test PCB θJA = 52.7°C/W 1.0 1 0.
PAGE 19
PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 21
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device TLV4120IDGNR Package Package Pins Type Drawing MSOPPower PAD DGN 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2500 330.0 12.4 Pack Materials-Page 1 5.3 B0 (mm) K0 (mm) P1 (mm) 3.4 1.4 8.0 W Pin1 (mm) Quadrant 12.
PAGE 22
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TLV4120IDGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 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.