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Texas Instruments THS4567IRUNR
- Part No.:
- THS4567IRUNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFQFN
- Datasheet:
-
THS4567IRUNR.pdf
- Description:
- IC OPAMP DIFF 1 CIRCUIT 10WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,035
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Product details
Overview
THS4567IRUNR from Texas Instruments is a 220 MHz gain-bandwidth, high-input-impedance fully differential amplifier (FDA) with independent input (VICM) and output (VOCM) common-mode control loops. It operates as a single-stage transimpedance amplifier (TIA) and ADC driver in optical encoder and medical sensor front-ends, delivering 500 V/µs slew rate, 4.2 nV/√Hz voltage noise, and rail-to-rail output swing on 3.3–5.5 V single or ±1.65–±2.75 V split supplies.
For engineers reviewing the THS4567IRUNR datasheet, THS4567IRUNR pinout, THS4567IRUNR application, or THS4567IRUNR equivalent, this page provides verified specifications, WQFN-10 pin functions, differential TIA/ADC driver use cases, and validated alternative options for precision analog signal conditioning in high-speed optical and biomedical systems.
Technical Context
The THS4567IRUNR implements a decompensated FDA architecture with minimum stable gain of 10 V/V. Its dual-loop control enables simultaneous VICM regulation-decoupling photodiode reverse bias from input/output swing compliance-and VOCM setting to match downstream ADC reference levels.
In TIA mode (ICM_EN = HIGH), it sustains 5 MHz input common-mode loop bandwidth and 220 MHz GBWP; in standard FDA mode (ICM_EN = LOW), it achieves 43 MHz small-signal bandwidth, –115 dBc HD2 at 100 kHz, and 0.2 Ω closed-loop differential output impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| GBWP | 220 MHz - Enables stable 10 V/V gain up to 22 MHz; supports wideband optical encoder feedback signals. |
| Slew Rate | 500 V/µs - Supports fast transient response in pulse oximeter and OCT applications without distortion. |
| Voltage Noise | 4.2 nV/√Hz - Low-noise performance critical for high-resolution photodiode current amplification. |
| Supply Current | 2 mA (active), 28 µA (shutdown) - Enables low-power operation in battery-powered clinical devices. |
| Operating Temp | –40°C to +125°C - Qualified for industrial motor position sensing and automotive-grade optical encoders. |
| Rail-to-Rail Output | Output swings within 75 mV of either rail (RL = 20 kΩ) - Maximizes dynamic range into 16-bit+ ADCs. |
| Input Impedance | 1 GΩ differential, 1 MΩ common-mode - Minimizes loading on high-impedance photodiodes and sensors. |
Pinout & Package
THS4567IRUNR is housed in a 2.00 mm × 2.00 mm, 10-pin WQFN package (RUN) with wettable flanks for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | Accepts positive-side photodiode or sensor signal; high-impedance CMOS node (20 pA bias current). |
| IN− | Inverting input | Accepts negative-side photodiode or sensor signal; matched to IN+ for common-mode rejection. |
| OUT+ | Noninverting output | Differential output terminal; delivers amplified, VOCM-referenced signal to ADC inputs. |
| OUT− | Inverting output | Differential output terminal; complements OUT+ for balanced drive and EMI immunity. |
| VICM | Input common-mode voltage setpoint | Defines average DC level at IN+/IN−; enables independent photodiode bias control in TIA mode. |
| VOCM | Output common-mode voltage setpoint | Sets (VOUT+ + VOUT−)/2 to match ADC reference; maintains common-mode alignment across temperature. |
| AMP_EN | Amplifier enable control | Active-HIGH logic input; powers down device to 28 µA when pulled low (VS−). |
| ICM_EN | Input common-mode loop enable | Enables/disables VICM control loop; HIGH configures TIA mode, LOW reverts to standard FDA operation. |
| VS+ | Positive supply | Accepts 3.3–5.5 V single or +2.5 V in split-supply configurations; supports wide input voltage range. |
| VS− | Negative supply | Accepts ground or –2.5 V; enables true bipolar operation for AC-coupled sensor interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Independent VICM & VOCM control | Decouples photodiode bias from amplifier swing limits-enabling >90% of supply voltage as PD reverse bias while maintaining full output compliance. |
| Configurable TIA/FDA operation | ICM_EN pin selects between transimpedance mode (for photodiode current conversion) and standard FDA mode (for general differential signaling). |
| Rail-to-rail output with low ZOUT | Delivers 8 VPP differential swing into 1 kΩ load with 0.2 Ω closed-loop output impedance-minimizing gain error in ADC driver stage. |
| Low-noise, high-Z CMOS inputs | 4.2 nV/√Hz voltage noise + 10 fA/√Hz current noise + 1 GΩ input resistance-optimized for low-light optical detection. |
| Wide supply & temp range | Operates from 3.3 V to 5.5 V single supply or ±1.65 V to ±2.75 V split supply across –40°C to +125°C-suitable for harsh industrial environments. |
Applications
| Absolute Optical Encoder | AC Drive Position Feedback |
|---|---|
Use Scenario: High-resolution angular position sensing using diffraction grating and dual photodiode arrays in servo motor feedback loops. IC Role / Device Role / Timing Role: THS4567IRUNR serves as a single-stage differential TIA, converting photocurrents into clean, VOCM-aligned differential voltages for 20-bit ADC sampling. Use Value: Independent VICM control maximizes photodiode reverse bias (reducing junction capacitance), enabling >10 MHz signal bandwidth and sub-arcsecond resolution. |
Use Scenario: Real-time rotor position tracking in industrial variable-frequency drives using resolvers or optical encoders. IC Role / Device Role / Timing Role: THS4567IRUNR acts as an FDA driving SAR ADC inputs, rejecting common-mode noise from PWM switching and motor EMI. Use Value: 80 dB CMRR and –115 dBc HD2 ensure <0.001% total harmonic distortion in position calculation algorithms under heavy load transients. |
| Clinical Pulse Oximeter | Optical Coherence Tomography |
Use Scenario: Dual-wavelength (660 nm / 940 nm) photoplethysmography in portable patient monitors measuring blood oxygen saturation. IC Role / Device Role / Timing Role: THS4567IRUNR functions as a low-noise, low-power TIA per channel, amplifying weak LED-modulated photocurrents before synchronous demodulation. Use Value: 28 µA shutdown current and 4.2 nV/√Hz noise support battery life >72 hours while resolving <100 nA signal variations at 100 Hz. |
Use Scenario: Interferometric depth scanning in ophthalmic imaging systems requiring ultra-low-noise, wideband amplification of backscattered light signals. IC Role / Device Role / Timing Role: THS4567IRUNR operates as a differential ADC driver for high-speed digitization of interferogram signals up to 100 MS/s. Use Value: 220 MHz GBWP and 500 V/µs slew rate preserve femtosecond-scale temporal fidelity in axial scan reconstruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fully differential amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS4551IRUNR | Lower GBWP (120 MHz), no VICM loop, 3.5 mA IQ, same WQFN-10 package | Lacks independent input common-mode control-unsuitable for photodiode TIA configurations requiring bias decoupling | Select when only standard FDA functionality is needed and cost sensitivity outweighs TIA capability. |
| LMH5401RTAR | Higher GBWP (18 GHz), current-feedback architecture, 25 mA IQ, 16-pin QFN | Requires external VOCM resistor network; no integrated VICM loop; optimized for RF/IF, not precision optical TIA | Choose for >100 MHz signal chains where speed dominates power and layout simplicity requirements. |
Compared with THS4567IRUNR, THS4551IRUNR offers lower power but forfeits photodiode bias flexibility, while LMH5401RTAR delivers extreme bandwidth at significantly higher quiescent current and design complexity-making THS4567IRUNR the optimal choice for precision optical encoder and clinical sensor front-ends demanding dual-loop control.
Availability
THS4567IRUNR is available at Aetrix Electronics and suitable for absolute optical encoders, clinical pulse oximeters, and optical coherence tomography systems requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for THS4567IRUNR 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 over 90 years of innovation in precision signal chain solutions.
The THS4567IRUNR belongs to TI's high-performance fully differential amplifier product line, engineered specifically for optical sensor interfaces and medical instrumentation requiring independent common-mode control, low noise, and robust thermal stability.
FAQ
What is the minimum stable gain for THS4567IRUNR?
The THS4567IRUNR is a decompensated fully differential amplifier with a minimum stable gain of 10 V/V. This requirement applies in both FDA mode (ICM_EN = LOW) and TIA mode (ICM_EN = HIGH). Operating below this gain risks instability and peaking in frequency response, as confirmed in Section 7.4 of the SBOSA51 datasheet.
How does the VICM loop function in THS4567IRUNR?
The VICM loop in THS4567IRUNR generates matched source/sink currents at IN+ and IN− to force the average input voltage toward the voltage applied to the VICM pin. When enabled (ICM_EN = HIGH), it decouples photodiode reverse bias from input swing limits-allowing full supply utilization for bias while preserving amplifier headroom. This behavior is explicitly characterized in Table 6.5.
Can THS4567IRUNR operate on a single 3.3 V supply?
Yes, THS4567IRUNR supports single-supply operation from 3.3 V to 5.5 V, as specified in Section 6.3 Recommended Operating Conditions. At 3.3 V, it maintains rail-to-rail output swing, 220 MHz GBWP, and 2 mA quiescent current-validated across –40°C to +125°C ambient temperature.
What is the purpose of the AMP_EN pin on THS4567IRUNR?
The AMP_EN pin is an active-HIGH digital control input that enables or disables the main amplifier core. When driven HIGH (≥ VS+ – 0.5 V), THS4567IRUNR operates normally; when pulled LOW (≤ VS– + 0.2 V), it enters shutdown mode drawing only 28 µA. The 1.5 µs turn-on delay and 0.9 µs turn-off delay are measured per Section 6.6 Power Down specifications.
Does THS4567IRUNR support split-supply operation?
Yes, THS4567IRUNR is fully specified for split-supply operation from ±1.65 V to ±2.75 V. Electrical characteristics-including GBWP, slew rate, noise, and output swing-are guaranteed across this range, with all test conditions in Sections 6.5 and 6.6 explicitly using ±2.5 V supplies. The VS+ and VS− pins accept true bipolar rails without modification.
THS4567IRUNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Differential
- Number of Circuits:
- 1
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 500V/µs
- Gain Bandwidth Product:
- 220 MHz
- -3db Bandwidth:
- 43 MHz
- Current - Input Bias:
- 20 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 1.9mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 3.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WQFN (2x2)
THS4567IRUNR FAQ
1.How can I place an order for THS4567IRUNR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4567IRUNR 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 THS4567IRUNR reliable?
The price and inventory of THS4567IRUNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4567IRUNR is usually 5 days.
3.What payment methods are accepted for THS4567IRUNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4567IRUNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4567IRUNR?
THS4567IRUNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4567IRUNR 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 THS4567IRUNR?
For technical support, including THS4567IRUNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4567IRUNR requirements.
6.How does Aetrix verify that THS4567IRUNR is sourced from the original manufacturer or authorized distributors?
All THS4567IRUNR 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 THS4567IRUNR meets industry standards.
7.What is the process for return or replacement of THS4567IRUNR?
All THS4567IRUNR units undergo pre-shipment inspection (PSI). If there is an issue with THS4567IRUNR, 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 THS4567IRUNR part is unused and in its original packaging.
Return procedure for THS4567IRUNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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