THS4031 - 100MHz Low-Noise High-Speed Amplifier | TI
MPN: THS4031 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
Drop-in alternatives for THS4031 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
THS4032
✅ Drop-In📋 Reference alternative (not in catalog)
THS4031IDGNR
✅ Drop-In📋 Reference alternative (not in catalog)
THS4031CDGN
✅ Drop-In📋 Reference alternative (not in catalog)
THS4031 Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Bandwidth (G=2) | 100 MHz |
| Slew Rate | 100 V/µs |
| Settling Time (0.1%) | 60 ns |
| Voltage Noise Density | 1.6 nV/√Hz |
| Total Harmonic Distortion (THD) | -72 dBc at 1 MHz, RL=100Ω; -90 dBc at 1 MHz, RL=1kΩ |
| Input Offset Voltage | 0.5 mV (typ) |
| Output Current | 90 mA |
| Supply Current per Channel | 8.5 mA |
| Supply Voltage Range | ±5 V to ±15 V |
| Unity-Gain Bandwidth | 275 MHz |
| Package | 8-HVSSOP (DGK) |
| Operating Temperature Range | -40°C to +85°C |
| RoHS Status | Compliant |
| Amplifier Type | Voltage Feedback |
THS4031 Pin Configuration
| Pin 1 | OUT — Amplifier output |
| Pin 2 | V- — Negative supply |
| Pin 3 | IN+ — Non-inverting input |
| Pin 4 | IN- — Inverting input |
| Pin 5 | V+ — Positive supply |
| Pin 6 | NC — No connect |
| Pin 7 | NC — No connect |
| Pin 8 | NC — No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
THS4031 is suitable for 6 applications: Communication Systems, Imaging Systems, Active Filters, ADC Drivers, Video Signal Conditioning, Test and Measurement.
Communication Systems
The THS4031's 100-MHz bandwidth and 1.6 nV/√Hz noise make it ideal for IF amplification and signal conditioning in communication receivers. Its high slew rate preserves signal integrity in high-frequency paths, and the low distortion ensures minimal intermodulation products. The amplifier can drive ADCs directly, simplifying the signal chain.
Recommended
Imaging Systems
In imaging systems, the THS4031's fast settling time (60 ns) and low noise are critical for accurate pixel processing. It can be used in CCD output buffers and video signal conditioning. The high output current (90 mA) allows driving cables and filters directly, reducing component count and improving reliability.
Recommended
Active Filters
The THS4031's high bandwidth and low distortion make it suitable for active filters in communication and instrumentation. Its unity-gain stability allows use in Sallen-Key and multiple-feedback topologies. The low noise ensures high dynamic range in filter applications, and the high slew rate prevents distortion at high frequencies.
Recommended
ADC Drivers
The THS4031 is an excellent choice for driving high-speed ADCs. Its low noise and fast settling time ensure accurate conversion, while the high output current can drive the ADC's input capacitance. The low distortion maintains signal fidelity, and the wide supply range allows interfacing with various ADC input ranges.
Recommended
Video Signal Conditioning
The THS4031's 100-MHz bandwidth and 100-V/µs slew rate are ideal for video signal conditioning. It can buffer and amplify composite video signals with minimal distortion. The high output current allows driving 75Ω cables directly, and the low noise ensures a clean video signal.
Recommended
Test and Measurement
In test and measurement equipment, the THS4031 provides high bandwidth and low noise for signal conditioning. Its fast settling time is essential for accurate measurements in oscilloscopes and data acquisition systems. The low distortion ensures measurement accuracy, and the wide supply range allows use in various instrument designs.
Recommended
Recommended Products Summary
Engineering reference data for THS4031 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | THS4032 | THS4031IDGNR | THS4031CDGN | THS4631D | THS3091 | AD8065 |
|---|---|---|---|---|---|---|---|
| Package | 8-HVSSOP (DGK) | 8-HVSSOP (DGK) | 8-HVSSOP (DGK) | 8-HVSSOP (DGK) | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Number of Channels | 1 | 2 | 1 | 1 | 1 | 1 | 1 |
| Bandwidth (G=2) | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 210 MHz | 210 MHz | 145 MHz |
| Slew Rate | 100 V/µs | 100 V/µs | 100 V/µs | 100 V/µs | 100 V/µs | 7300 V/µs | 180 V/µs |
| Voltage Noise Density | 1.6 nV/√Hz | 1.6 nV/√Hz | 1.6 nV/√Hz | 1.6 nV/√Hz | 7 nV/√Hz | 2.2 nV/√Hz | 7 nV/√Hz |
| Output Current | 90 mA | 90 mA | 90 mA | 90 mA | 100 mA | 250 mA | 45 mA |
| Supply Current per Channel | 8.5 mA | 8.5 mA | 8.5 mA | 8.5 mA | 11.5 mA | 9.5 mA | 6.4 mA |
Key Differentiators
- Ultra-low voltage noise of 1.6 nV/√Hz (vs THS4631D)
- High output current of 90 mA (vs AD8065)
- Low distortion of -90 dBc at 1 MHz (vs THS3091)
Design Notes
Use 0.1-µF ceramic capacitors close to the V+ and V- pins for power supply decoupling. Additionally, place 10-µF tantalum capacitors at the supply entry points to filter low-frequency noise. Proper decoupling is critical to maintain the THS4031's low noise and high bandwidth performance.
For optimal performance, use a ground plane and keep feedback and input traces short. The thermal pad on the HVSSOP package should be soldered to a copper plane to enhance heat dissipation. Avoid routing high-speed signals near the input pins to prevent coupling.
Do not exceed the absolute maximum supply voltage of ±16.5V. Ensure the output does not short to ground for extended periods, as this can cause thermal stress. The THS4031 is not designed for capacitive loads above 100 pF without a series resistor; add a small resistor (e.g., 50Ω) in series with the output if driving capacitive loads.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified.
