THS3061DGNR - 300MHz 7000V/us CFB Amplifier | Texas Instruments
MPN: THS3061DGNR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.8 | $38.00 |
| 100 | $3.35 | $335.00 |
| 500 | $3 | $1,500.00 |
| 1,000 | $2.7 | $2,700.00 |
Drop-in alternatives for THS3061DGNR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
THS3061DGN
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$3.26 / Unit
View Datasheet βTHS3061DGNG4
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
THS3062DGN
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
THS4062IDGNR
β Drop-Inβ In Stock
$1.45 / Unit
View Datasheet βTHS4061IDGNR
β Drop-Inπ Reference alternative (not in catalog)
THS3061DGNR Maximum Ratings & Electrical Characteristics
| Amplifier Type | Current Feedback (CFB) |
| Number of Channels | 1 |
| Unity Gain Bandwidth | 300 MHz |
| 0.1 dB Bandwidth | 120 MHz (G = 2) |
| Slew Rate | 7000 V/us |
| Output Current | +/-145 mA into 50 ohm |
| 2nd Harmonic Distortion | -81 dBc at 10 MHz |
| Supply Voltage Range | +/-15 V (30 V total) |
| Operating Temperature Range | -40C to +85C |
| Package | HVSSOP-8 (DGN) with PowerPAD, 8 pins |
| Mounting Type | Surface Mount |
| Process Technology | TI BICOM-1 |
| Packaging | Tape & Reel (R suffix) |
| Category | Linear - Amplifiers - Instrumentation, Op Amps, Buffer Amps |
THS3061DGNR Pin Configuration
| Pin 1 | IN- β Inverting input (low impedance, current-feedback node) |
| Pin 2 | IN+ β Non-inverting input (high impedance) |
| Pin 3 | V- β Negative supply |
| Pin 4 | V- β Negative supply |
| Pin 5 | NC β Not connected (per datasheet) |
| Pin 6 | V+ β Positive supply |
| Pin 7 | OUT β Amplifier output |
| Pin 8 | NC β Not connected (per datasheet) |
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
THS3061DGNR is suitable for 6 applications: High-Voltage Pulse Amplification, High-Speed ADC Input Driver, Laser Diode and LED Drivers, Video and Communications Signal Chains, Test and Measurement Instrumentation, Active Filter and Gain Blocks at High Supply.
High-Voltage Pulse Amplification
The THS3061DGNR fits pulse amplification because it combines a 7000 V/us slew rate with +/-145 mA output current and up to +/-15 V supplies, allowing fast, large-signal pulses to be reproduced without slew-induced distortion. In a typical pulse chain the amplifier is configured in a gain-of-2 or higher non-inverting CFB topology with the datasheet-recommended feedback resistor, driving 50-ohm coaxial lines directly. The PowerPAD package dissipates heat from the heavy load currents, and the 300 MHz bandwidth keeps pulse edges in the nanosecond range sharp. Unlike slower voltage-feedback parts such as the THS4061 (400 V/us), the THS3061 preserves fast rise times without adding slew limiting.
Recommended
High-Speed ADC Input Driver
Driving high-speed ADCs at high input swing benefits from the THS3061DGNR's combination of 300 MHz bandwidth, -81 dBc distortion at 10 MHz, and +/-145 mA drive into low impedances. Placed as a gain block immediately before an ADC input, it isolates the source impedance from the ADC's switched-capacitor load through a series resistor network, while the low output impedance settles the sampling transient quickly. The 0.1 dB flatness bandwidth of 120 MHz at G=2 keeps passband gain error small across wideband signal chains. Because it is a current-feedback amplifier, the feedback resistor should follow datasheet recommendations to avoid peaking near the Nyquist band.
Recommended
Laser Diode and LED Drivers
Laser diode modulation in instrumentation and optical test demands both current and speed; the THS3061DGNR's +/-145 mA output into 50 ohm and 7000 V/us slew rate let it drive modulation transistors or direct laser loads with nanosecond-class edges. Operating from +/-15 V rails gives the voltage headroom needed to keep current through series drive elements constant during fast transitions. The HVSSOP PowerPAD package routes device heat into the PCB ground plane, which matters at sustained high duty cycles. Designers should verify the load line stays inside the amplifier's output-current rating and add appropriate back-termination to damp cable reflections.
Recommended
Video and Communications Signal Chains
Wideband video distribution and IF/RF gain blocks benefit from the THS3061DGNR's 120 MHz 0.1 dB flatness bandwidth at G=2, which keeps multi-channel video signals gain-matched across the band. The -81 dBc HD2 performance at 10 MHz limits harmonic spurs that would otherwise fold into the video or communication band. Set in a gain-of-2 CFB configuration with a 50-ohm back-terminated output, it can drive distribution cables directly at +/-145 mA capability. Compared with the THS4062IDGNR voltage-feedback alternative, the CFB architecture maintains bandwidth more uniformly across gain settings in reconfigurable chains.
Recommended
Test and Measurement Instrumentation
Oscilloscope front ends, active probes, and signal generators need amplifiers that combine speed, swing, and drive; the THS3061DGNR's 300 MHz bandwidth and 7000 V/us slew rate support full-scale displays of fast waveforms without visible slew distortion, while the +/-15 V supply range matches classic bench-instrument analog rails. Its -81 dBc distortion at 10 MHz preserves measurement fidelity in harmonic-sensitive test setups. The PowerPAD DGN package simplifies thermal design inside dense instrument chassis. In signal-generator output stages, a series 50-ohm termination plus the amplifier's high current capability yields accurate source impedance into cables.
Recommended
Active Filter and Gain Blocks at High Supply
Wideband active filters and general gain stages operating on +/-15 V rails use the THS3061DGNR where a 30 V total supply and 300 MHz bandwidth must coexist. Many high-speed amplifiers are limited to 12 V total supply, forcing reduced signal swing; the THS3061's high-voltage BICOM-1 process removes that constraint, doubling available output swing and improving SNR for a given noise floor. In Sallen-Key or multiple-feedback topologies, the CFB architecture's gain-independent bandwidth keeps filter corner frequencies stable as gain is adjusted. Designers must use stable CFB feedback-resistor values to prevent Q-enhancement peaking near the amplifier's phase margin limit.
Recommended
Recommended Products Summary
Engineering reference data for THS3061DGNR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | THS3061DGN | THS3062DGN | THS4062IDGNR | THS4061IDGNR |
|---|---|---|---|---|---|
| Package | HVSSOP-8 (DGN) PowerPAD | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same | HVSSOP-8 (DGN) PowerPAD - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Type | Current Feedback, single | Current Feedback, single | Current Feedback, dual | Voltage Feedback, dual | Voltage Feedback, single |
| Slew Rate | 7000 V/us | 7000 V/us | Same family class (~7000 V/us) | 400 V/us | 400 V/us |
| Bandwidth | 300 MHz (unity gain) | 300 MHz | Same family class (~300 MHz) | 180 MHz | 180 MHz |
| Output Current | +/-145 mA into 50 ohm | +/-145 mA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Supply Voltage | up to +/-15 V (30 V total) | +/-15 V | +/-15 V | [DATA_NEEDED] | [DATA_NEEDED] |
| Distortion (HD2) | -81 dBc at 10 MHz | -81 dBc at 10 MHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | Industrial (I grade) | Industrial (I grade) |
Key Differentiators
- Extreme slew rate for fast large-signal pulses (vs THS4061IDGNR)
- Same footprint with a lower-cost VFB fallback (vs THS4061IDGNR)
- Dual-channel upgrade path on the same die family (vs THS3062DGN)
Design Notes
Solder the PowerPAD under the DGN package to a solid ground plane with an array of thermal vias. This exposed pad is the primary thermal and low-inductance ground return for the amplifier; omitting it raises junction temperature and degrades high-frequency performance. Follow the TI datasheet PowerPAD layout section for recommended via pattern and pad dimensions.
Do not design the feedback network as if this were a voltage-feedback amplifier. In the THS3061 current-feedback topology, the feedback resistor RF sets the closed-loop bandwidth and stability: use the RF value recommended in the TI datasheet for your gain setting. A capacitor directly at the inverting input node (even a few pF of stray capacitance) reduces phase margin and can cause peaking or oscillation; keep that node's traces short and avoid sockets.
Decouple each supply pin (pins 3/4 for V- and pin 6 for V+) with low-ESR ceramic capacitors, e.g. 6.8 uF bulk plus 0.1 uF high-frequency bypass placed within a few millimeters of the pins. Estimated: at +/-15 V supplies and +/-145 mA peak output, transient supply currents are large; inadequate decoupling causes ringing on fast edges and may couple slew-rate transients into adjacent analog circuitry through supply impedance.
Estimated: driving +/-145 mA into 50 ohm loads from +/-15 V rails can dissipate on the order of (V+ - VOUT) * IOUT per side during sustained output; at high duty cycles this approaches hundreds of milliwatts. With the PowerPAD properly soldered to a multi-via ground plane, junction rise is manageable; without it, the small DGN thermal pad cannot remove the heat and the -40C to +85C ambient rating may be exceeded.
Use 50-ohm back-termination (series resistor at the output) when driving coaxial cables, and route the feedback trace as a short, direct connection with a ground guard beneath. For gains above the minimum stable gain, increase RF per datasheet guidance rather than adding loop capacitance, which preserves the 0.1 dB flatness bandwidth of 120 MHz at G=2 and keeps HD2 near the -81 dBc specification.
Compliance Information
Compliance data not present in provided verified web data; the G4 suffix variant (THS3061DGNG4) is TI's green packaging designation. Confirm current RoHS/REACH status on ti.com.
