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Texas Instruments TLV4120IDGN
- Part No.:
- TLV4120IDGN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
TLV4120IDGN.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,783
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Product details
Overview
TLV4120IDGN from Texas Instruments is a single-supply, rail-to-rail output, high-output-current differential operational amplifier delivering >200 mA per output at 5 V, with 2.4 MHz unity-gain bandwidth and 1.5 V/µs slew rate. It integrates internal VDD/2 biasing and active shutdown, enabling use as a high-current line driver, LVDT coil driver, or bridge-tied load (BTL) amplifier in industrial sensor and actuator interfaces.
For engineers reviewing the TLV4120IDGN datasheet, TLV4120IDGN pinout, TLV4120IDGN application, or TLV4120IDGN equivalent, key selection criteria include its differential drive capability, thermal performance in MSOP PowerPAD™, shutdown current of 6 µA, and operation across −40°C to 85°C industrial temperature range.
Technical Context
The TLV4120IDGN implements a dual-amplifier architecture: A1 is a fully configurable op-amp (inverting/noninverting/difference), while A2 is an internally biased inverting amplifier referenced to VDD/2. This configuration generates true complementary differential outputs without external level-shifting circuitry.
Its MSOP-8 PowerPAD™ package features an exposed thermal pad electrically isolated from all terminals, enabling low θJA (52.7°C/W) and continuous 350 mA per output at TJ ≤ 105°C. Shutdown control disables both amplifiers, placing outputs in high-impedance state and reducing supply current to 6 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 200 mA per output at 5 V - enables direct driving of heavy resistive or inductive loads without external buffers |
| Unity-Gain Bandwidth | 2.4 MHz - supports stable closed-loop operation up to audio-frequency signals with gain ≥1 |
| Slew Rate | 1.5 V/µs at 5 V - ensures <1 µs settling for 1 VPP signals, suitable for fast transient response in actuator control |
| Rail-to-Rail Output | Swings within 0.12 V of rails at 10 mA - maximizes dynamic range in single-supply 2.7–5.5 V systems |
| Shutdown Current | 6 µA typical - reduces system standby power in battery-operated or energy-sensitive applications |
| Supply Voltage Range | 2.7 V to 5.5 V - compatible with Li-ion, USB, and industrial 3.3 V/5 V rails without level translation |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded systems with extended ambient exposure |
Pinout & Package
The TLV4120IDGN is housed in an 8-pin MSOP PowerPAD™ package (DGN), featuring an exposed thermal pad on the underside for enhanced heat dissipation. The pad is electrically isolated and must be soldered to a PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SHDN | Shutdown control input | Active-high logic: >0.75×VDD disables amplifier and forces outputs to high-Z; |
| 2 - IN− | Inverting input of A1 | Configurable node for inverting amplifier, difference amplifier, or transimpedance configurations |
| 3 - IN+ | Noninverting input of A1 | Accepts single-ended or differential input signals; high-impedance MOS input (≥1 GΩ) |
| 4 - VDD/2 | Internal mid-rail reference node | Internally generated bias point; requires external 0.1–2.2 µF low-ESR capacitor for stability and noise suppression |
| 5 - VO− | Negative differential output | Complementary output from A2; swings opposite VO+ to enable bridge-tied load operation |
| 6 - GND | Analog ground reference | Primary return path for bias currents and output load current; must connect to thermal pad ground plane |
| 7 - VDD | Positive supply rail | Accepts 2.7–5.5 V; requires local 0.1 µF ceramic + 10 µF bulk decoupling per datasheet guidelines |
| 8 - VO+ | Positive differential output | Main output from A1; forms differential pair with VO− to double effective load voltage swing |
Key Features
| Feature | Design Value |
|---|---|
| Differential output drive | Delivers true complementary VO+ and VO− signals with matched slew and current capability, enabling BTL operation that quadruples delivered load power vs single-ended drive |
| Integrated VDD/2 bias generator | Eliminates need for external resistor divider; internal 500 kΩ resistors provide stable mid-rail reference for A2's inverting stage |
| Thermally enhanced PowerPAD™ | Reduces θJC to 4.7°C/W; allows 350 mA continuous per output at TJ ≤ 105°C when properly mounted to PCB ground plane |
| Low-power shutdown mode | Reduces IDD to 6 µA while maintaining high-impedance outputs - critical for intermittent-sensing applications like valve position feedback |
| Rail-to-rail output stage | Supports full-scale signal swing in 2.7 V systems (e.g., 0.12 V to 2.58 V at 100 mA), preserving SNR in low-voltage industrial I/O modules |
Applications
| LVDT/RVDT Signal Conditioning | Industrial Analog Output Driver |
|---|---|
Use Scenario: Driving primary winding of linear variable differential transformer (LVDT) in precision position sensing for hydraulic actuators or CNC machine tools. IC Role / Device Role / Timing Role: Differential current source providing balanced AC excitation at 1–10 kHz, rejecting common-mode noise induced in long cable runs. Use Value: Delivers >200 mA peak current into inductive load while maintaining phase-matched VO+/VO− outputs, improving position resolution by >12-bit effective accuracy. | Use Scenario: Generating ±10 V or 4–20 mA analog outputs from microcontroller DACs in PLC analog output modules. IC Role / Device Role / Timing Role: High-current buffer and level shifter converting single-ended DAC output to isolated, low-impedance differential drive for transmission over noisy factory floors. Use Value: Rail-to-rail swing at 5 V supply enables full 0–10 V range with headroom for calibration margins; shutdown mode cuts quiescent power during module sleep cycles. |
| Capacitive Load Line Driver | Bridge-Tied Loudspeaker Amplifier |
Use Scenario: Driving long cables (≥100 m) with distributed capacitance (>1 nF) in building automation HVAC control valves. IC Role / Device Role / Timing Role: High-slew, current-limited line driver with optional RNULL series resistor to maintain phase margin and prevent ringing. Use Value: 1.5 V/µs slew rate and 200 mA drive ensure clean step response into 1000 pF + 100 Ω loads; thermal design prevents derating in enclosed enclosures. | Use Scenario: Low-power audio amplification for embedded UI speakers or alarm tones in medical devices and test equipment. IC Role / Device Role / Timing Role: Bridge-tied load (BTL) amplifier delivering up to 64 mW into 8 Ω with THD+N <1% at 1 kHz. Use Value: Doubled effective load voltage (2×VO(PP)) enables 4× power delivery vs single-ended topology - critical for space-constrained designs lacking external H-bridge ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3091D | Higher slew rate (2000 V/µs), wider bandwidth (210 MHz), but no integrated VDD/2 bias or shutdown; requires external level-shifting network | Targeted at high-speed video or RF IF stages, not low-frequency high-current drive | Choose THS3091D only when bandwidth >100 MHz is required and board space permits discrete biasing circuitry |
| OPA2674IDGKT | Lower output current (250 mA peak, not continuous), no shutdown, fixed gain options only; uses SOIC-8, no thermal pad | Designed for broadband communications; lacks rail-to-rail output and industrial temp range | Select OPA2674IDGKT for wideband signal chain buffering where thermal constraints are less severe and shutdown is unnecessary |
Compared with THS3091D and OPA2674IDGKT, the TLV4120IDGN uniquely combines integrated mid-rail biasing, active shutdown, rail-to-rail operation, and thermally robust PowerPAD™ packaging - making it the only option optimized for continuous high-current differential drive in space- and power-constrained industrial systems.
Availability
TLV4120IDGN is available at Aetrix Electronics and suitable for industrial sensor conditioning, analog output modules, and embedded actuator drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLV4120IDGN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and personal electronics markets.
The TLV4120IDGN belongs to TI's precision high-output-current op-amp product line, designed specifically for single-supply differential drive applications including LVDT excitation, analog output stages, and bridge-tied load amplification in harsh industrial environments.
FAQ
What is the maximum continuous output current per channel for TLV4120IDGN at 85°C ambient?
The TLV4120IDGN delivers 350 mA continuous per output at TJ ≤ 105°C. At TA = 85°C with proper PCB thermal design (PowerPAD™ soldered to ground plane), junction temperature remains within limit, sustaining full 350 mA capability. Derating applies only above TJ = 105°C - e.g., 110 mA at TJ = 150°C. The TLV4120IDGN datasheet specifies this under "Absolute Maximum Ratings" and "Dissipation Rating Table" for DGN package.
Does TLV4120IDGN require external resistors to set differential gain?
Yes - differential gain depends on external RF and RS resistors. With A1 configured as inverter: DiffGain = −2×(RF/RS); with A1 noninverting: DiffGain = 2×(1 + RF/RS). The TLV4120IDGN does not include internal gain-setting resistors; RF values typically range 5–20 kΩ to balance noise, stability, and gain accuracy per the "Gain Setting Resistors" section of the SLOS310B datasheet.
Can TLV4120IDGN drive capacitive loads, and what is the recommended compensation?
Yes - TLV4120IDGN can drive capacitive loads up to 1 nF stably. For loads >1 nF, add a series nulling resistor (RNULL) between each output and the load, as shown in Figure 22 of the datasheet. This preserves phase margin and prevents ringing. The TLV4120IDGN's high output current inherently improves capacitive drive capability compared to standard op-amps, but RNULL remains essential for stability at higher CL.
How is the VDD/2 reference used in TLV4120IDGN, and what capacitor value is recommended?
The VDD/2 pin provides the internal bias reference for amplifier A2. A low-ESR capacitor (0.1–2.2 µF ceramic or tantalum) must be placed directly from VDD/2 to GND to stabilize the reference and suppress noise coupling. Per Equation 4 in the datasheet, CB must satisfy CB ≥ 250 kΩ × (1/(RF + RS + CS)) to prevent start-up bounce. For typical RF = 10 kΩ, RS = 10 kΩ, CS = 0.47 µF, a 2.2 µF CB meets this requirement and ensures robust PSRR and THD+N performance.
Is the thermal pad of TLV4120IDGN electrically connected to any pin?
No - the exposed thermal pad on the TLV4120IDGN's MSOP PowerPAD™ package is electrically isolated from all pins, as confirmed in Figure 25(c) and the "General PowerPAD Design Considerations" section of the datasheet. It must be soldered to a PCB copper area tied to GND for thermal conduction, but no electrical connection is made through the pad itself. This isolation prevents ground loops while enabling efficient heat transfer to the PCB ground plane.
TLV4120IDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- 1.57V/µs
- Gain Bandwidth Product:
- 2.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.3 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.4mA
- Current - Output / Channel:
- 320 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
TLV4120IDGN FAQ
1.How can I place an order for TLV4120IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV4120IDGN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TLV4120IDGN reliable?
The price and inventory of TLV4120IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV4120IDGN is usually 5 days.
3.What payment methods are accepted for TLV4120IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV4120IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV4120IDGN?
TLV4120IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV4120IDGN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TLV4120IDGN?
For technical support, including TLV4120IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV4120IDGN requirements.
6.How does Aetrix verify that TLV4120IDGN is sourced from the original manufacturer or authorized distributors?
All TLV4120IDGN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLV4120IDGN meets industry standards.
7.What is the process for return or replacement of TLV4120IDGN?
All TLV4120IDGN units undergo pre-shipment inspection (PSI). If there is an issue with TLV4120IDGN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TLV4120IDGN part is unused and in its original packaging.
Return procedure for TLV4120IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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