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Texas Instruments THS4531IDR
- Part No.:
- THS4531IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4531IDR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
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Product details
Overview
THS4531IDR from Texas Instruments is an ultra-low-power, fully-differential amplifier with rail-to-rail output and negative-rail input capability. It delivers 36 MHz bandwidth, 200 V/µs slew rate, and –120 dBc THD at 1 kHz (1 VRMS), operating from 2.5 V to 5.5 V supply while drawing only 250 µA quiescent current. It is engineered for precision ADC driving in low-power, high-channel-count data acquisition systems.
For engineers reviewing the THS4531IDR datasheet, THS4531IDR pinout, THS4531IDR application, or THS4531IDR equivalent, this page provides verified specifications, SOIC-8 package details, differential signal conditioning use cases, and validated alternative options - all grounded in TI's production-grade characterization across –40°C to +125°C.
Technical Context
The THS4531IDR implements a fully-differential architecture with independent VOCM control, enabling precise DC-coupled interfacing to SAR and ΔΣ ADCs. Its input common-mode range extends 0.2 V below the negative rail, and its rail-to-rail output supports full dynamic range utilization with single-supply operation.
It features integrated power-down functionality (0.5 µA typical), output balance error of –67 dB at 1 MHz, and 114 dB open-loop gain - ensuring high DC accuracy and stable closed-loop performance in noise-sensitive analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - enables direct integration into battery-powered and low-voltage industrial systems without level-shifting. |
| Quiescent Current | 250 µA - reduces thermal load and extends runtime in portable or dense multi-channel sensor nodes. |
| Small-Signal Bandwidth | 36 MHz at VS = 5 V - supports wideband signal conditioning up to ~12 MHz 0.1-dB flatness for high-fidelity ADC drivers. |
| Slew Rate | 220/390 V/µs (rise/fall) - ensures faithful reproduction of fast transient signals without distortion in pulse applications. |
| THD @ 1 kHz | –122 dBc (1 VRMS, RL = 2 kΩ) - meets high-resolution audio and metrology requirements where harmonic purity is critical. |
| Input Voltage Noise | 10 nV/√Hz at 1 kHz - minimizes added noise in low-level signal amplification stages before digitization. |
| Input Offset Drift | ±4 µV/°C (–40°C to +125°C) - maintains DC accuracy over extended temperature ranges in unregulated environments. |
Pinout & Package
THS4531IDR is packaged in an 8-pin SOIC (D) with body size 4.90 mm × 3.91 mm, optimized for automated assembly and thermal reliability in industrial PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VIN– | Inverting input terminal - accepts feedback or inverted signal path; supports single-ended-to-differential conversion when paired with VIN+. |
| 2 | VOCM | Output common-mode voltage control input - sets DC bias point of differential outputs; enables seamless interface to ADC reference midpoints. |
| 3 | VS+ | Positive power supply - connects to 2.5–5.5 V rail; decoupling required within 1 cm for stability. |
| 4 | VOUT+ | Non-inverted differential output - delivers amplified positive-phase signal; matched impedance critical for balanced line driving. |
| 5 | VOUT– | Inverted differential output - delivers complementary negative-phase signal; must be routed symmetrically to VOUT+. |
| 6 | VS– | Negative power supply - typically ground in single-supply configurations; ties internally on multichannel variants. |
| 7 | PD | Power-down enable - logic high (≥2.1 V) enables operation; logic low (≤0.7 V) reduces current to 0.5 µA for system sleep modes. |
| 8 | VIN+ | Non-inverting input terminal - accepts primary signal source; combined with VIN– enables fully differential gain configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 120 mV of VS+ and 100 mV of VS– at ±25 mA load - maximizes dynamic range for 16-bit+ ADCs without external level-shifting. |
| Negative-rail input | Accepts inputs down to VS– – 0.2 V - simplifies interface to ground-referenced sensors and transducers in single-supply systems. |
| Output common-mode control | VOCM pin tracks input with 0.99–1.01 gain and ±5 mV offset - ensures accurate, programmable DC bias alignment with ADC common-mode requirements. |
| Ultra-low power-down current | 0.5 µA typical - enables rapid wake/sleep cycling in energy-constrained IoT edge nodes without sacrificing startup latency (600 ns turn-on). |
| High DC accuracy | 114 dB AOL and ±200 µV max input offset at 25°C - reduces calibration overhead in precision measurement front-ends. |
Applications
| Low-Power SAR ADC Driver | Differential Signal Conditioning |
|---|---|
|
Use Scenario: Driving 16-bit successive-approximation ADCs (e.g., ADS8860) in portable data loggers powered by coin-cell batteries. IC Role / Device Role: Fully-differential amplifier converting single-ended sensor outputs to matched differential signals while rejecting common-mode noise. Use Value: 250 µA quiescent current and rail-to-rail output preserve battery life and full-scale resolution without external biasing networks. |
Use Scenario: Preconditioning analog outputs from MEMS accelerometers and pressure sensors before multiplexed digitization in industrial PLC modules. IC Role / Device Role: Low-noise, high-PSRR differential driver providing gain, CM rejection, and VOCM-adjustable output swing. Use Value: –122 dBc THD and 10 nV/√Hz input noise maintain SNR integrity across 20 kHz bandwidth in multi-sensor acquisition systems. |
| Single-Ended to Differential Conversion | High Channel Count Data Acquisition |
|
Use Scenario: Interfacing legacy single-ended instrumentation signals (e.g., thermocouple amps) to modern differential-input ADCs in test equipment. IC Role / Device Role: Precision gain stage with VOCM-controlled output common-mode set to match ADC reference midpoint (e.g., 2.5 V). Use Value: Input common-mode range extending below ground eliminates need for level-shifting op-amps or charge pumps. |
Use Scenario: Front-end amplification in 32-channel medical ECG monitor with tight thermal and board-space constraints. IC Role / Device Role: Low-power, thermally efficient differential driver minimizing self-heating and crosstalk in densely populated analog sections. Use Value: 133°C/W θJA (SOIC) and 250 µA supply current allow >100 devices per board without forced-air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully-differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4521IDR | Higher bandwidth (145 MHz), higher IQ (1.14 mA), no rail-to-rail output - limited output swing near rails. | Better suited for wideband RF sampling or high-speed oscilloscope front-ends where speed outweighs power budget. | Select THS4521IDR only if >36 MHz bandwidth is mandatory and power consumption is secondary. |
| THS4551IRUNR | Higher bandwidth (150 MHz), lower THD (–128 dBc), WQFN-10 package - requires different layout and lacks SOIC-8 option. | Preferred for space-constrained, high-performance designs requiring superior harmonic suppression above 100 kHz. | Choose THS4551IRUNR when footprint reduction and enhanced AC performance justify requalification and layout revision. |
Compared with THS4531IDR, THS4521IDR trades 4.5× higher supply current for 4× bandwidth, while THS4551IRUNR offers 2.5× lower THD in a smaller package but mandates new PCB design - making THS4531IDR optimal for cost-sensitive, thermally constrained, low-power ADC driver roles.
Availability
THS4531IDR is available at Aetrix Electronics and suitable for low-power SAR ADC driver, differential signal conditioning, and high channel count data acquisition applications requiring stable component supply and long-term industrial temperature support.
Supply support for THS4531IDR 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 precision amplifiers and data converter interfaces.
The THS4531IDR belongs to TI's ultra-low-power fully-differential amplifier product line, designed specifically for energy-efficient, high-accuracy analog front-ends in portable instrumentation, industrial sensing, and medical data acquisition systems.
FAQ
What is the operating temperature range for the THS4531IDR?
The THS4531IDR is characterized for continuous operation from –40°C to +125°C, meeting extended industrial requirements. All key parameters-including input offset drift (±4 µV/°C), bandwidth (36 MHz), and THD (–122 dBc)-are specified across this full range, ensuring reliability in harsh environments like motor control enclosures or outdoor sensor nodes.
Does the THS4531IDR support single-supply operation?
Yes, the THS4531IDR supports true single-supply operation from 2.5 V to 5.5 V. Its negative-rail input allows VIN– and VIN+ to accept signals down to VS– – 0.2 V, and its rail-to-rail output swings within 120 mV of both supply rails - enabling direct interface to ground-referenced sources and mid-supply-biased ADCs without external level shifters.
How does the VOCM pin function in the THS4531IDR?
The VOCM pin in the THS4531IDR sets the DC common-mode voltage of the differential outputs (VOUT+ and VOUT–) with 0.99–1.01 gain and ±5 mV offset. When driven to a stable voltage (e.g., 2.5 V), it forces the output pair's average to match that level - essential for matching ADC input common-mode requirements and enabling DC-coupled signal chains without AC coupling capacitors.
What is the power-down behavior of the THS4531IDR?
When the PD pin is pulled ≤0.7 V, the THS4531IDR enters power-down mode, reducing quiescent current to 0.5 µA typical. Output is disabled (high-impedance), and turn-off time is 15 ns. Applying ≥2.1 V to PD restores operation in 600 ns, with full output settling within 60 ns - making it ideal for burst-mode sensing and duty-cycled data acquisition systems.
Which package options are available for the THS4531IDR?
The THS4531IDR is offered exclusively in the SOIC-8 (D) package (4.90 mm × 3.91 mm), as indicated by the "IDR" suffix in the ordering code. Other variants like THS4531IDGKR (VSSOP-8) and THS4531IRUNR (WQFN-10) exist but are distinct orderable parts - the THS4531IDR itself is not available in those packages.
THS4531IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 390V/µs
- Gain Bandwidth Product:
- 27 MHz
- -3db Bandwidth:
- 36 MHz
- Current - Input Bias:
- 160 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 250µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
THS4531IDR FAQ
1.How can I place an order for THS4531IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4531IDR 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 THS4531IDR reliable?
The price and inventory of THS4531IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4531IDR is usually 5 days.
3.What payment methods are accepted for THS4531IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4531IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4531IDR?
THS4531IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4531IDR 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 THS4531IDR?
For technical support, including THS4531IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4531IDR requirements.
6.How does Aetrix verify that THS4531IDR is sourced from the original manufacturer or authorized distributors?
All THS4531IDR 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 THS4531IDR meets industry standards.
7.What is the process for return or replacement of THS4531IDR?
All THS4531IDR units undergo pre-shipment inspection (PSI). If there is an issue with THS4531IDR, 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 THS4531IDR part is unused and in its original packaging.
Return procedure for THS4531IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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