My Inquiry
My Account
Texas Instruments THS4601IDDAR
- Part No.:
- THS4601IDDAR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
THS4601IDDAR.pdf
- Description:
- IC OPAMP GP 1 CIRC 8SOPWRPAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,549
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
THS4601IDDAR from Texas Instruments is a high-speed FET-input operational amplifier optimized for wideband transimpedance gain stages, photodiode amplification, and high-impedance signal conditioning. It delivers 180 MHz gain-bandwidth product, 100 V/µs slew rate, ±15 V supply operation, 5.4 nV/√Hz input voltage noise, and 100 pA maximum input bias current - enabling low-noise amplification of weak current signals in optical and test systems.
For engineers reviewing the THS4601IDDAR datasheet, THS4601IDDAR pinout, THS4601IDDAR application, or THS4601IDDAR equivalent, this page provides verified specifications, SOIC-8 PowerPAD™ package details, transimpedance design context, real-world application mappings, and two validated alternative parts with functional and thermal differentiation.
Technical Context
The THS4601IDDAR employs a JFET-input stage to achieve ultra-low input bias current (≤100 pA) and high differential input impedance (10⁹ Ω || 3.5 pF), making it inherently suitable for capacitive current-source interfaces like photodiodes. Its unity-gain stable architecture supports configurable closed-loop gains from +1 to +100 without external compensation.
It operates across ±5 V to ±15 V supplies, delivering ±12.8 V output swing into 1 kΩ at ±15 V, and maintains 95 dB minimum CMRR and 115 dB PSRR. Thermal performance is enhanced by the PowerPAD™-equipped SOIC-8 (DDA) package, achieving θJA = 66.6°C/W - critical for sustained high-speed operation in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 180 MHz - enables simultaneous high transimpedance gain (e.g., 100 kΩ) and >3 MHz bandwidth with 18 pF photodiode capacitance. |
| Slew Rate | 100 V/µs - supports clean 10 Vpp output steps at 5 MHz without slewing distortion in high-speed integrators or DAC buffers. |
| Input Bias Current | Max 100 pA at 25°C - minimizes DC error in high-impedance photodiode and sensor front-ends where leakage dominates accuracy. |
| Input Voltage Noise | 5.4 nV/√Hz - preserves SNR when amplifying sub-µV-level signals from low-output photodiodes or precision current sources. |
| Supply Voltage Range | ±5 V to ±15 V - allows flexible rail selection: ±5 V for low-power portable instruments; ±15 V for maximum dynamic range in test equipment. |
| Output Swing | ±12.8 V (min) into 1 kΩ at ±15 V - delivers >25 Vpp signal headroom for driving ADC inputs or active filters without clipping. |
| Common-Mode Input Range | ±13.0 V at ±15 V supply - accommodates biased photodiode configurations with wide common-mode voltage margins. |
Pinout & Package
THS4601IDDAR uses an 8-pin SOIC surface-mount package with PowerPAD™ (DDA), thermally enhanced for high-power dissipation in compact PCB footprints. The exposed thermal pad must be soldered to a PCB copper plane for optimal junction-to-ambient thermal resistance (θJA = 66.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 (NC) | No internal connection | Unused pins; must remain unconnected or grounded only if required for mechanical stability - no electrical function. |
| 2 (IN−) | Inverting input | Primary node for transimpedance feedback; low input capacitance (3.5 pF) reduces peaking with photodiode capacitance. |
| 3 (IN+) | Noninverting input | High-impedance reference node; typically tied to bias voltage or ground in single-supply photodiode circuits. |
| 4 (VS−) | Negative power supply | Accepts −5 V to −16.5 V; must be decoupled with ≥0.1 µF ceramic capacitor near the pin. |
| 6 (OUT) | Amplifier output | Capable of sourcing/sinking ≥50 mA; drives 150 Ω video loads or 1 kΩ data acquisition inputs directly. |
| 7 (VS+) | Positive power supply | Accepts +5 V to +16.5 V; paired with VS− for symmetrical rail operation essential for AC-coupled photodiode amps. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables ≤100 pA input bias current - critical for minimizing offset drift and dark-current error in photodiode amplifiers. |
| Unity-gain stable | Operates reliably at G = +1 without external compensation - simplifies design of wideband current-to-voltage converters. |
| High supply voltage tolerance | Rated for ±16.5 V absolute max - supports robust operation in industrial test gear with noisy or fluctuating rails. |
| Low harmonic distortion | −77 dBc 2nd harmonic (1 MHz, 2 Vpp, RL = 1 kΩ) - preserves signal fidelity in video and instrumentation signal chains. |
| PowerPAD™ thermal enhancement | Reduces θJA from 170°C/W (standard SOIC) to 66.6°C/W - enables continuous 100 mA output current without thermal shutdown. |
Applications
| Wideband Photodiode Amplifier | High-Speed Transimpedance Gain Stage |
|---|---|
Use Scenario: Converting nanoampere-level photocurrent from fast silicon or InGaAs photodiodes into measurable voltage signals in optical time-domain reflectometers (OTDR) and laser rangefinders. IC Role / Device Role / Timing Role: Primary transimpedance amplifier with feedback resistor and capacitor network; sets system bandwidth and noise floor. Use Value: 180 MHz GBW and 5.4 nV/√Hz noise enable >4 MHz bandwidth with 100 kΩ gain and 18 pF diode capacitance - meeting OTDR pulse resolution requirements. |
Use Scenario: Amplifying output current from high-speed DACs (e.g., 16-bit, 100 MSPS) in arbitrary waveform generators and RF signal synthesizers. IC Role / Device Role / Timing Role: Current-to-voltage buffer stage; isolates DAC output from reactive load while preserving edge integrity. Use Value: 100 V/µs slew rate ensures <170 ns settling to 0.01% for 5 V steps - maintaining waveform fidelity up to 5 MHz fundamental frequency. |
| Test and Measurement Systems | Active Filtering |
Use Scenario: Front-end gain block in digital storage oscilloscopes and spectrum analyzers requiring high-Z, low-noise signal acquisition up to 100 MHz. IC Role / Device Role / Timing Role: First-stage amplifier in multi-channel analog signal path; defines noise figure and bandwidth limit. Use Value: 115 dB PSRR and 95 dB CMRR suppress power rail and ground bounce interference - critical for accurate low-level signal capture in mixed-signal instruments. |
Use Scenario: Implementing 4th-order low-pass or bandpass filters in medical imaging front-ends and ultrasound beamforming circuits. IC Role / Device Role / Timing Role: Active filter op-amp in multiple feedback (MFB) or state-variable topologies; determines Q-factor and passband flatness. Use Value: Unity-gain stability and 180 MHz GBW support filter cutoff frequencies up to 20 MHz with <0.1 dB ripple - meeting Doppler ultrasound spectral resolution specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA655IDBVR | Higher 400 MHz GBW but lower ±5 V max supply; 6 nV/√Hz noise; not rated for ±15 V operation. | Better suited for low-voltage, ultra-wideband RF IF amplification; unsuitable for ±15 V photodiode biasing or high-dynamic-range test gear. | Select OPA655IDBVR only when supply is limited to ±5 V and bandwidth >200 MHz is mandatory - avoid where rail flexibility or photodiode bias headroom is needed. |
| THS4631D | Same SOIC-8 PowerPAD™ package; 190 MHz GBW; 120 V/µs slew; but higher 10 pA typical IIB (vs. THS4601's 30 pA typ). | Optimized for lower-noise, higher-speed DAC buffering; less ideal for ultra-low-bias photodiode amps with >100 MΩ feedback resistors. | Choose THS4631D when prioritizing speed over input bias - e.g., in high-resolution digitizer front-ends where 10 pA bias is acceptable. |
Compared with OPA655IDBVR and THS4631D, THS4601IDDAR uniquely balances ±15 V operation, ultra-low 100 pA max input bias, and 180 MHz GBW - making it the only option among the three qualified for wideband photodiode amplification with high-voltage biasing and low-dark-current sensitivity.
Availability
THS4601IDDAR is available at Aetrix Electronics and suitable for optical sensing, automated test equipment (ATE), and high-fidelity signal acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for THS4601IDDAR 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 op-amps and precision signal-chain solutions.
The THS4601IDDAR belongs to TI's high-speed FET-input op-amp family, engineered specifically for transimpedance amplification, photodiode interfacing, and wideband signal conditioning in test, medical, and optical infrastructure applications.
FAQ
What is the operating temperature range for THS4601IDDAR?
The THS4601IDDAR is specified for −40°C to +85°C ambient operation (I-suffix grade). This extended industrial range ensures reliable performance in optical modules deployed in outdoor telecom cabinets, factory-floor ATE systems, and medical diagnostic equipment where thermal cycling occurs. The DDA package's 66.6°C/W θJA helps maintain safe junction temperatures even under sustained 100 mA output loading.
Does THS4601IDDAR require external compensation for unity-gain stability?
No, THS4601IDDAR is internally compensated for unity-gain stability. It operates cleanly at closed-loop gains of +1 without external phase compensation components - a key enabler for simple, robust transimpedance amplifier designs. This eliminates tuning complexity in photodiode circuits where feedback resistor and capacitor values are selected solely for bandwidth and noise optimization, not stability margin.
How does the PowerPAD™ feature improve thermal performance of THS4601IDDAR?
The PowerPAD™ on THS4601IDDAR is an exposed thermal pad on the underside of the SOIC-8 (DDA) package that must be soldered to a PCB copper pour. It reduces junction-to-ambient thermal resistance from 170°C/W (standard SOIC-8) to 66.6°C/W - enabling 2.5× higher continuous power dissipation. This allows THS4601IDDAR to sustain 100 mA output current without thermal derating in space-constrained layouts typical of portable test instruments.
Can THS4601IDDAR drive a 150 Ω video load at 10 MHz?
Yes, THS4601IDDAR can drive a 150 Ω load at 10 MHz with minimal distortion. At G = +2, it delivers −77 dBc 2nd harmonic (1 MHz, 2 Vpp) and maintains >5 MHz small-signal bandwidth into 150 Ω. Its 100 V/µs slew rate supports full-scale 2 Vpp video swings at 10 MHz without slewing artifacts, and its 115 dB PSRR rejects sync pulse noise on shared power rails - meeting NTSC/PAL differential gain (0.02%) and phase (0.08°) specs.
What is the maximum feedback resistor value usable with THS4601IDDAR in a photodiode amplifier?
THS4601IDDAR supports feedback resistors up to 1 MΩ in photodiode amplifiers, as validated in TI's SLOS388B datasheet Table 1. With 18 pF source capacitance, a 1 MΩ RF achieves 1.1 MHz −3 dB bandwidth using zero feedback capacitance. For higher gains, parasitic capacitance dominates - so layout optimization (guard rings, short traces) and optional CF tuning (e.g., 0.4 pF for 220 pF sources) are essential to preserve stability and flatness in THS4601IDDAR-based transimpedance designs.
THS4601IDDAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 100V/µs
- Gain Bandwidth Product:
- 180 MHz
- -3db Bandwidth:
- 440 MHz
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 10mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO PowerPad
THS4601IDDAR FAQ
1.How can I place an order for THS4601IDDAR through Aetrix?
Please submit a Request for Quotation (RFQ) for THS4601IDDAR 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 THS4601IDDAR reliable?
The price and inventory of THS4601IDDAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for THS4601IDDAR is usually 5 days.
3.What payment methods are accepted for THS4601IDDAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for THS4601IDDAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for THS4601IDDAR?
THS4601IDDAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your THS4601IDDAR 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 THS4601IDDAR?
For technical support, including THS4601IDDAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your THS4601IDDAR requirements.
6.How does Aetrix verify that THS4601IDDAR is sourced from the original manufacturer or authorized distributors?
All THS4601IDDAR 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 THS4601IDDAR meets industry standards.
7.What is the process for return or replacement of THS4601IDDAR?
All THS4601IDDAR units undergo pre-shipment inspection (PSI). If there is an issue with THS4601IDDAR, 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 THS4601IDDAR part is unused and in its original packaging.
Return procedure for THS4601IDDAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
THS4601IDDAR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
