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Texas Instruments THS4531AID
- Part No.:
- THS4531AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4531AID.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,464
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Product details
Overview
THS4531AID 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 (G = 1 V/V), 200 V/µs slew rate, and –120 dBc THD at 1 kHz (1 VRMS), enabling high-fidelity signal conditioning in power-constrained data acquisition systems.
For engineers reviewing the THS4531AID datasheet, THS4531AID pinout, THS4531AID application, or THS4531AID equivalent, key selection criteria include its 250 µA quiescent current, precise VOCM control for DC-coupled ADC interfacing, wide 2.5–5.5 V supply range, and support for single-ended-to-differential conversion in SAR/ΔΣ ADC driver circuits.
Technical Context
The THS4531AID implements a fully differential architecture with independent common-mode control via the VOCM pin, allowing accurate output common-mode voltage setting across temperature and supply variations. Its input stage extends below the negative rail (VS– – 0.2 V), enabling direct interface to ground-referenced sources without level-shifting.
It features integrated power-down functionality (0.5 µA typical), low 10 nV/√Hz input voltage noise at 1 kHz, and high DC accuracy with ±100 µV input offset voltage and ±3 µV/°C drift over –40°C to +125°C - all optimized for precision, low-power analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - supports single-supply operation in battery-powered and industrial 3.3 V/5 V systems |
| Quiescent Current | 250 µA - enables >10-year battery life in always-on sensor nodes and portable instrumentation |
| Small-Signal Bandwidth | 36 MHz at G = 1 V/V - sufficient for driving 1 MSPS+ SAR ADCs with minimal group delay |
| Slew Rate | 200 V/µs - ensures faithful reproduction of fast transient signals up to ~3 MHz full-power bandwidth |
| Input Offset Voltage | ±100 µV max - reduces DC error in precision gain stages and bridge sensor amplifiers |
| THD @ 1 kHz | –120 dBc (1 VRMS) - preserves dynamic range in audio and high-resolution measurement chains |
| VOCM Control Accuracy | ±1 mV common-mode offset - guarantees matched differential output levels for optimal ADC SNR |
Pinout & Package
THS4531AID is packaged in an 8-pin SOIC (D) with body size 4.90 mm × 3.91 mm, suitable for space-constrained PCB layouts while maintaining manufacturability and thermal performance (RθJA = 133°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN– | Inverting input | Accepts differential or single-ended input; supports common-mode down to VS– – 0.2 V |
| VIN+ | Non-inverting input | Complements VIN–; enables true differential signaling or single-ended-to-differential conversion |
| VOUT– | Inverted output | Delivers complementary signal to VOUT+; rail-to-rail swing improves ADC utilization |
| VOUT+ | Non-inverted output | Paired with VOUT–; balanced differential output minimizes EMI and common-mode noise |
| VOCM | Output common-mode control | Directly sets output midpoint voltage; critical for DC-coupling to ADC reference rails |
| PD | Power-down enable | Logic-high activates normal operation; logic-low reduces current to 0.5 µA for standby mode |
| VS+ | Positive supply | Accepts 2.5–5.5 V; internal regulation ensures stable bias under supply ripple |
| VS– | Negative supply | Typically grounded; supports dual-supply operation and defines input/output voltage limits |
Key Features
| Feature | Design Value |
|---|---|
| Fully differential architecture | Enables rejection of even-order harmonics and common-mode interference in noisy environments |
| Rail-to-rail output (RRO) | Maximizes dynamic range into ADCs by delivering full supply swing without headroom loss |
| Negative-rail input (NRI) | Allows direct connection to 0-V referenced sensors (e.g., thermocouples, resistive bridges) without external biasing |
| Precision VOCM control | Maintains <±1 mV output common-mode error, ensuring optimal ADC differential input alignment |
| Ultra-low-power operation | 250 µA IQ and 0.5 µA power-down current enable energy harvesting and long-life IoT endpoints |
Applications
| Low-Power SAR ADC Driver | Single-Ended to Differential Conversion |
|---|---|
Use Scenario: Driving ADS7044 (12-bit, 1-MSPS) in a portable medical sensor node powered by a coin-cell battery. IC Role / Device Role / Timing Role: Front-end differential driver with DC-coupled VOCM control, matching ADC's internal reference and maximizing ENOB. Use Value: 250 µA quiescent current extends battery life beyond 5 years; RRO output ensures full 12-bit code utilization. | Use Scenario: Converting ground-referenced microphone output to differential signal for noise-immune transmission to codec IC. IC Role / Device Role / Timing Role: Single-ended input → differential output amplifier with NRI capability, eliminating need for AC coupling or bias resistors. Use Value: Input common-mode range extending to VS– enables direct 0-V referenced input; 36 MHz bandwidth preserves audio fidelity up to 20 kHz. |
| High-Channel-Count Data Acquisition | Low-Power ΔΣ ADC Interface |
Use Scenario: Multi-channel industrial temperature monitor using 16 ADS8861 (16-bit, 1-MSPS) ADCs on a single PCB. IC Role / Device Role / Timing Role: Channel-isolated differential driver providing matched gain, phase, and VOCM tracking across all channels. Use Value: ±100 µV VOS and ±3 µV/°C drift minimize inter-channel offset mismatch; 8-pin SOIC footprint simplifies layout density. | Use Scenario: Interfacing THS4531AID to ADS8321E (16-bit, 100-kSPS ΔΣ ADC) in a precision weigh scale system. IC Role / Device Role / Timing Role: Low-noise, low-drift driver with VOCM set to mid-supply, enabling DC-coupled, zero-latency signal path. Use Value: 10 nV/√Hz input voltage noise and –120 dBc THD preserve 16-bit effective resolution; power-down mode reduces idle power in sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4521DR | Higher power (1.14 mA IQ), higher bandwidth (145 MHz), lower noise (4.6 nV/√Hz) | Targeted at high-speed, high-precision applications where power budget allows >4× current draw | Select THS4521DR only when >100 MHz bandwidth or sub-5 nV/√Hz noise is required; not suitable for ultra-low-power designs. |
| THS4532RTDE | Dual-channel version in WQFN-10; identical per-channel specs but shared supply pins | Optimized for space-constrained dual-signal-path systems (e.g., I/Q demodulation, stereo audio) | Choose THS4532RTDE when two matched differential drivers are needed on one die; requires different layout and decoupling strategy. |
Compared with THS4531AID, THS4521DR trades 4.6× higher quiescent current for 4× bandwidth and 2× lower noise, while THS4532RTDE offers channel pairing at identical per-channel performance - making THS4531AID uniquely suited for single-channel, battery-operated, precision signal conditioning.
Availability
THS4531AID is available at Aetrix Electronics and suitable for low-power data acquisition, portable instrumentation, and high-channel-count industrial monitoring requiring stable component supply and long-term production continuity.
Supply support for THS4531AID 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 THS4531AID belongs to TI's ultra-low-power fully differential amplifier product line, engineered specifically for DC-coupled, single-supply interfacing between sensors and high-resolution SAR/ΔΣ ADCs in power-sensitive applications.
FAQ
What is the maximum operating supply voltage for the THS4531AID?
The THS4531AID supports a maximum supply voltage of 5.5 V across VS+ to VS–. This rating applies under absolute maximum conditions; for reliable operation, the recommended range is 2.5 V to 5.5 V. Exceeding 5.5 V risks permanent damage, and operation below 2.5 V may degrade bandwidth and output swing. The THS4531AID maintains full specification compliance across this range, including at 3.3 V and 5 V nominal supplies.
Does the THS4531AID support true DC-coupled operation with ADCs?
Yes, the THS4531AID supports true DC-coupled operation with ADCs via its precision VOCM input, which allows direct setting of output common-mode voltage within ±1 mV accuracy. Combined with rail-to-rail output and negative-rail input, it enables seamless interface to ADCs like the ADS7044 or ADS8861 without AC coupling or external bias networks - preserving low-frequency response and minimizing offset drift in the signal chain.
What is the power-down behavior of the THS4531AID?
When the PD pin is driven low (<0.7 V), the THS4531AID enters power-down mode with typical quiescent current of 0.5 µA. Output is disabled (high-impedance), and turnoff time is 15 ns. Upon re-enabling (PD >2.1 V), turnon time is 600 ns to reach 90% of final output. This rapid, low-leakage shutdown makes THS4531AID ideal for duty-cycled sensor systems where intermittent signal acquisition is required.
Can the THS4531AID drive 600-Ω loads effectively?
Yes, the THS4531AID is characterized to drive 600-Ω differential loads with specified performance: at VS = 5 V, it delivers 1 VRMS output with –120 dBc THD and maintains 36 MHz bandwidth. Its linear output current drive is ±25 mA (min), supporting 600-Ω loads with <120 mV saturation voltage - ensuring clean, undistorted signal delivery to legacy audio and test equipment interfaces.
How does the input common-mode range of the THS4531AID benefit sensor interfacing?
The THS4531AID features negative-rail input (NRI), allowing its inputs to operate down to VS– – 0.2 V. This enables direct connection to ground-referenced sensors - such as RTDs, strain gauges, and thermocouples - without external level-shifting circuitry. In practice, this simplifies front-end design, eliminates bias resistor errors, and improves DC accuracy in precision measurement systems using the THS4531AID.
THS4531AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 250µA
- Current - Output / Channel:
- -
- 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
THS4531AID FAQ
1.How can I place an order for THS4531AID through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4531AID 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 THS4531AID reliable?
The price and inventory of THS4531AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4531AID is usually 5 days.
3.What payment methods are accepted for THS4531AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4531AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4531AID?
THS4531AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4531AID 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 THS4531AID?
For technical support, including THS4531AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4531AID requirements.
6.How does Aetrix verify that THS4531AID is sourced from the original manufacturer or authorized distributors?
All THS4531AID 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 THS4531AID meets industry standards.
7.What is the process for return or replacement of THS4531AID?
All THS4531AID units undergo pre-shipment inspection (PSI). If there is an issue with THS4531AID, 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 THS4531AID part is unused and in its original packaging.
Return procedure for THS4531AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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