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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments THS3125CPWP

Name: THS3125CPWP
Brand: Texas Instruments
SKU: THS3125CPWP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: THS3125CPWP

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-PowerTSSOP (0.173", 4.40mm Width)

Datasheet:: THS3125CPWP.pdf

Description:: IC OPAMP CFA 2 CIRCUIT 14HTSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

THS3125CPWP from Texas Instruments is a dual-channel, bipolar-input, current-feedback amplifier optimized for low-noise, high-output-current video and instrumentation signal conditioning. It delivers 2.2-nV/√Hz voltage noise, 450-mA output drive into 50-Ω loads, 128-MHz –3-dB bandwidth (G = 2, RL = 50 Ω), and –80-dBc THD at 1 MHz with 2-VPP output - enabling precision wideband line driving in broadcast video distribution systems.

For engineers reviewing the THS3125CPWP datasheet, THS3125CPWP pinout, THS3125CPWP application, or THS3125CPWP equivalent, key selection criteria include shutdown-enabled power management (370-µA quiescent current), HTSSOP PowerPAD thermal performance (θJA = 37.5°C/W), dual-channel crosstalk (–67 dBc), and ±5-V to ±15-V dual-supply operation with rail-to-rail input common-mode range.

Technical Context

The THS3125CPWP implements a current-feedback architecture with separate high-impedance noninverting inputs (1 IN+, 2 IN+) and low-impedance inverting inputs (1 IN−, 2 IN−), enabling wide bandwidth independent of closed-loop gain. Its transimpedance gain stage drives a Class-AB output stage capable of ±230-mA continuous output into 50 Ω while maintaining <0.01% differential gain error across NTSC/PAL video signals.

Shutdown control is implemented via a dedicated SHUTDOWN pin referenced to the REF pin, with enable/disable thresholds defined relative to REF (Enable: REF + 0.8 V; Disable: REF + 2 V). The REF pin accepts voltages from VCC− to VCC+ − 4 V, allowing flexible biasing for single- or dual-supply systems without external level-shifting circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Bandwidth (–3 dB)	128 MHz at G = 2, RL = 50 Ω, VCC = ±15 V - supports full HD video baseband transmission without gain peaking.
Slew Rate	1550 V/µs at G = 2, RL = 50 Ω - enables clean reproduction of fast transient video sync pulses and pulse-width modulated signals.
Voltage Noise	2.2 nV/√Hz at 10 kHz - minimizes added noise in low-level sensor signal amplification chains.
Output Current Drive	±440 mA peak at VCC = ±15 V, RL = 25 Ω - sustains 26-VPP swing into 50-Ω terminated lines without clipping.
THD	–80 dBc at 1 MHz, 2-VPP, G = 2 - meets broadcast-grade distortion requirements for analog video distribution.
Shutdown Current	370 µA per channel - reduces system standby power by >95% versus active mode (8.4 mA).
Input Common-Mode Range	±12.7 V at VCC = ±15 V - accommodates large-swing AC-coupled video signals without clamping or rail interference.

Pinout & Package

THS3125CPWP is housed in a 14-pin HTSSOP PowerPAD (PWP) package measuring 5.00 mm × 4.40 mm with an exposed thermal pad on the underside requiring PCB copper connection for optimal thermal dissipation (θJA = 37.5°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 IN+	Noninverting input, Channel 1	High-impedance node for signal source connection; sets gain polarity and reference point for feedback network.
1 IN−	Inverting input, Channel 1	Low-impedance current-summing node; connects to feedback resistor (RF) and load return path.
1 OUT	Output, Channel 1	Class-AB output capable of ±440 mA into 25 Ω; requires local bypassing and proper layout for stability.
2 IN+	Noninverting input, Channel 2	Independent high-Z input for second signal path; electrically isolated from Channel 1 except via shared supply rails.
2 IN−	Inverting input, Channel 2	Separate current-summing node; allows independent gain configuration per channel without interaction.
2 OUT	Output, Channel 2	Matched output stage to Channel 1; crosstalk ≤ –67 dBc ensures minimal inter-channel interference.
VCC+	Positive power supply	Accepts +5 V to +15 V; must be decoupled with ≥100 nF ceramic capacitor near pin.
VCC−	Negative power supply	Accepts –5 V to –15 V; requires symmetric decoupling and low-inductance ground return.
REF	Shutdown reference voltage	Defines threshold for SHUTDOWN pin; internally biased to mid-supply if left floating, enabling default-on operation.
SHUTDOWN	Active-low shutdown control	Logic-low (≤ REF + 0.8 V) enables amplifier; logic-high (≥ REF + 2 V) reduces ICC to 370 µA per channel.
N/C (Pins 5, 7, 8, 10)	No internal connection	Unbonded die pads; must remain unconnected and unstubbed to avoid parasitic coupling or EMI.

Key Features

Feature	Design Value
Low-noise current-feedback architecture	2.2-nV/√Hz voltage noise + 2.9-pA/√Hz noninverting current noise enables high-fidelity signal amplification without gain-dependent bandwidth loss.
Thermally enhanced HTSSOP PowerPAD	37.5°C/W junction-to-ambient thermal resistance allows 3.3 W power dissipation with standard 2-oz copper PCB layout - critical for sustained 450-mA output drive.
Independent dual-channel operation	Channel offset voltage matching ≤ 4 mV and crosstalk ≤ –67 dBc ensure matched gain/phase response for stereo audio, dual-sensor, or differential video paths.
Programmable shutdown threshold	REF pin sets SHUTDOWN enable/disable levels relative to itself - eliminates need for external voltage dividers in single-supply or asymmetric rail applications.
Video-optimized distortion performance	0.01% differential gain error and 0.011° differential phase error at NTSC/PAL standards guarantee color fidelity in serially terminated 75-Ω video distribution.

Applications

Video Distribution	Instrumentation Signal Conditioning
Use Scenario: Driving four 75-Ω serially terminated SD/HD video lines from a single source in broadcast routing switchers. IC Role / Device Role / Timing Role: Dual-channel current-feedback amplifier providing unity-gain stable, low-distortion buffering with precise differential gain/phase matching. Use Value: Maintains <0.03% differential gain error and <0.011° phase error across NTSC/PAL signals - preserving color accuracy without post-correction circuitry.	Use Scenario: Amplifying low-level outputs from piezoelectric sensors or strain gauges in automated test equipment. IC Role / Device Role / Timing Role: High-output-current, low-noise transimpedance amplifier converting nanoamp-level sensor currents into robust voltage signals. Use Value: 450-mA drive capability enables direct interface to 50-Ω ADC front-ends or long coaxial cables without additional buffering stages.
High-Speed Line Drivers	Precision Piezo Drivers
Use Scenario: Transmitting high-fidelity analog waveforms over 50-Ω backplanes in modular instrumentation racks. IC Role / Device Role / Timing Role: Wideband current-feedback driver delivering 26-VPP swing into 50-Ω loads with <100 ns settling time to 0.1%. Use Value: 1550-V/µs slew rate and 128-MHz bandwidth support multi-MHz arbitrary waveform generation without slew-induced distortion.	Use Scenario: Generating high-voltage, low-noise excitation signals for piezoelectric actuators in nanopositioning stages. IC Role / Device Role / Timing Role: Bipolar-input amplifier operating from ±15-V supplies to deliver ±13.3-V output swing into capacitive piezo loads. Use Value: 2.2-nV/√Hz input voltage noise minimizes jitter in closed-loop position control; shutdown mode reduces idle power during actuator hold states.

Video Distribution

Instrumentation Signal Conditioning

Use Scenario: Driving four 75-Ω serially terminated SD/HD video lines from a single source in broadcast routing switchers.

IC Role / Device Role / Timing Role: Dual-channel current-feedback amplifier providing unity-gain stable, low-distortion buffering with precise differential gain/phase matching.

Use Value: Maintains <0.03% differential gain error and <0.011° phase error across NTSC/PAL signals - preserving color accuracy without post-correction circuitry.

Use Scenario: Amplifying low-level outputs from piezoelectric sensors or strain gauges in automated test equipment.

IC Role / Device Role / Timing Role: High-output-current, low-noise transimpedance amplifier converting nanoamp-level sensor currents into robust voltage signals.

Use Value: 450-mA drive capability enables direct interface to 50-Ω ADC front-ends or long coaxial cables without additional buffering stages.

High-Speed Line Drivers

Precision Piezo Drivers

Use Scenario: Transmitting high-fidelity analog waveforms over 50-Ω backplanes in modular instrumentation racks.

IC Role / Device Role / Timing Role: Wideband current-feedback driver delivering 26-VPP swing into 50-Ω loads with <100 ns settling time to 0.1%.

Use Value: 1550-V/µs slew rate and 128-MHz bandwidth support multi-MHz arbitrary waveform generation without slew-induced distortion.

Use Scenario: Generating high-voltage, low-noise excitation signals for piezoelectric actuators in nanopositioning stages.

IC Role / Device Role / Timing Role: Bipolar-input amplifier operating from ±15-V supplies to deliver ±13.3-V output swing into capacitive piezo loads.

Use Value: 2.2-nV/√Hz input voltage noise minimizes jitter in closed-loop position control; shutdown mode reduces idle power during actuator hold states.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, high-speed current-feedback amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
THS3125ID	Same electrical specs but SOIC-14 (D) package (8.65 mm × 3.91 mm); θJA = 66.6°C/W vs. PWP's 37.5°C/W.	Limited to lower-power or lower-ambient-temperature deployments due to higher thermal resistance; no PowerPAD required.	Select THS3125ID only when board space permits larger SOIC footprint and thermal load is ≤1.88 W.
THS3095DR	Single-channel, 400-mA output, 210-MHz bandwidth, 12-nV/√Hz noise; no shutdown function; SOIC-8 package.	Higher bandwidth but higher noise and no power-down mode; unsuitable for dual-channel or low-power standby use cases.	Choose THS3095DR only for single-ended, ultra-wideband (>150 MHz) applications where THS3125CPWP's dual-channel integration is unnecessary.

Compared with THS3125ID and THS3095DR, THS3125CPWP uniquely combines dual-channel operation, industry-leading 2.2-nV/√Hz noise, thermally optimized HTSSOP PowerPAD packaging, and programmable shutdown - making it the sole option for space-constrained, high-fidelity, low-power video and instrumentation line drivers.

Availability

THS3125CPWP is available at Aetrix Electronics and suitable for video distribution systems, precision instrumentation signal chains, high-speed line drivers, and piezoelectric actuator interfaces requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for THS3125CPWP 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 and embedded processing technologies, with decades of expertise in high-performance amplifiers and signal chain solutions.

The THS3125CPWP belongs to TI's THS312x family of low-noise, high-output-current current-feedback amplifiers, designed specifically for demanding wideband applications including broadcast video, test equipment, and precision motion control.

FAQ

What is the maximum output voltage swing of THS3125CPWP into a 50-Ω load?

The THS3125CPWP delivers up to ±13.3 V (26.6-VPP) output voltage swing into a 50-Ω load at VCC = ±15 V and G = 4. This is confirmed in the Electrical Characteristics table under "Output voltage swing" with test condition VI = 3.325 V, RL = 50 Ω, and TA = +25°C. Performance degrades slightly at temperature extremes, with minimum guaranteed swing of ±11.5 V across the full industrial range.

Does THS3125CPWP support single-supply operation?

Yes, THS3125CPWP supports single-supply operation from 10 V to 30 V (VCC+ to VCC−), as specified in Recommended Operating Conditions. Input common-mode range extends to within 2.7 V of either rail (e.g., 0 V to +12.3 V with +15 V supply), and REF pin functionality allows shutdown threshold adjustment without external level shifters - enabling robust single-supply video line driving.

How does the REF pin affect THS3125CPWP shutdown behavior?

The REF pin sets the reference voltage for the SHUTDOWN pin's enable/disable thresholds: device enables when SHUTDOWN ≤ REF + 0.8 V and disables when SHUTDOWN ≥ REF + 2 V. If REF is left unconnected, it defaults to mid-supply, allowing simple logic-level control. THS3125CPWP uses this to achieve 370-µA shutdown current per channel - a key differentiator from THS3122 variants lacking this feature.

What thermal design considerations apply to THS3125CPWP in HTSSOP PowerPAD packaging?

THS3125CPWP's HTSSOP PowerPAD (PWP) package requires soldering the exposed thermal pad to a minimum 100-mm² copper pour on the PCB's inner or outer layer, connected via ≥4 thermal vias to internal ground planes. This achieves the rated θJA = 37.5°C/W. Without proper thermal pad connection, junction temperature may exceed 150°C under 450-mA load conditions, risking permanent damage per TI Technical Brief SLMA002.

Can THS3125CPWP replace THS3122CD in existing designs?

No - THS3125CPWP is not a drop-in replacement for THS3122CD. While both share core amplifier functionality, THS3125CPWP adds SHUTDOWN and REF pins (absent in THS3122CD), uses a 14-pin HTSSOP vs. 8-pin SOIC, and has different pinout and thermal characteristics. Board redesign and layout revision are required to accommodate THS3125CPWP's extra pins and PowerPAD thermal requirements.

THS3125CPWP Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-PowerTSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

Product Status:: Obsolete

Amplifier Type:: Current Feedback

Number of Circuits:: 2

Output Type:: -

Slew Rate:: 1550V/µs

Gain Bandwidth Product:: 138 MHz

-3db Bandwidth:: 160 MHz

Current - Input Bias:: 6 µA

Voltage - Input Offset:: 4.4 mV

Current - Supply:: 8.4mA (x2 Channels)

Current - Output / Channel:: 440 mA

Voltage - Supply Span (Min):: 10 V

Voltage - Supply Span (Max):: 30 V

Operating Temperature:: 0°C ~ 70°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-HTSSOP

THS3125CPWP FAQ

1.How can I place an order for THS3125CPWP through Aetrix?

Please submit a Request for Quotation (RFQ) for THS3125CPWP 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 THS3125CPWP reliable?

The price and inventory of THS3125CPWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS3125CPWP is usually 5 days.

3.What payment methods are accepted for THS3125CPWP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS3125CPWP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for THS3125CPWP?

THS3125CPWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your THS3125CPWP 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 THS3125CPWP?

For technical support, including THS3125CPWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS3125CPWP requirements.

6.How does Aetrix verify that THS3125CPWP is sourced from the original manufacturer or authorized distributors?

All THS3125CPWP 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 THS3125CPWP meets industry standards.

7.What is the process for return or replacement of THS3125CPWP?

All THS3125CPWP units undergo pre-shipment inspection (PSI). If there is an issue with THS3125CPWP, 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 THS3125CPWP part is unused and in its original packaging.

Return procedure for THS3125CPWP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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