THS4215D - 1 GHz High-Speed Amplifier with Shutdown | Texas Instruments
Teilenummer: THS4215D ✓ AktivTHS4215D Übersicht
A voltage feedback operational amplifier is a closed-loop device whose inverting feedback network sets the closed-loop gain while the forward path is regulated to minimize distortion. The amplifier sits in the analog signal conditioning hierarchy: amplifier IC -> voltage feedback amplifier -> op amp -> analog signal conditioning integrated circuit. High-speed voltage feedback amplifiers are used wherever signals must be amplified with minimal magnitude and phase error at RF-like frequencies, such as ADC drivers, video paths, and active filters.
Key differentiating features of the THS4215D include 1 GHz unity-gain bandwidth, a 970 V/us slew rate, ultra-low distortion, and a dedicated shutdown (power-down) control that lets the designer park the amplifier in a low-power state without removing it from the circuit. Because it is unity-gain stable, no external compensation network is required for gain-of-one buffering, and the same part can be used with resistive feedback for higher closed-loop gains.
The combination of high slew rate, wide bandwidth, low distortion, and unity-gain stability is what makes the THS4211/THS4215 family a high-performance device across multiple AC specifications. The THS4215 offers the same performance as the THS4211 with the addition of power-down capability, making it the preferred member when system power management or channel muting is required. Because a 1 GHz bandwidth part is extremely sensitive to parasitic feedback, the device demands short, controlled routing and clean decoupling rather than simply a good schematic.
Typical applications include high-speed ADC and DAC interface amplifiers, video and graphics signal chains, active filters, and test and measurement instrumentation front ends. In each case the part replaces a discrete or multi-stage amplifier chain with a single low-distortion, high-bandwidth device.
When designing with the THS4215D, treat the PCB as part of the circuit: use very short feedback resistors, provide local high-frequency decoupling on both supply pins, and keep the shutdown control trace away from high-impedance input nodes. Confirm that the required closed-loop gain does not demand noise gain stability limits that the unity-gain stable architecture cannot support.
This page consolidates manufacturer specifications, verified distributor pricing, drop-in replacement analysis, and practical design notes that are typically split across the datasheet, distributor listings, and application notes - helping engineers select, source, and implement the part with fewer iterations.
Drop-in-Alternativen für THS4215D – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit THS4215D (gleiche Bauform und Footprint) – abweichend in Package, Slew Rate, Amplifier Type, Operating Temperature Range, Supply Voltage Range.
THS4211D
✅ Drop-In ⚠️ Spezifikationen ungeprüftPreis auf Anfrage
Datenblatt ansehen →THS4281D
✅ Drop-In ⚠️ Spezifikationen ungeprüftPreis auf Anfrage
Datenblatt ansehen →THS4031D
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
THS4211IPB
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
THS4215D Grenzwerte & elektrische Eigenschaften
| Amplifier Type | Voltage Feedback Amplifier, single circuit |
| Small-Signal Bandwidth | 1 GHz |
| Slew Rate | 970 V/us |
| Gain Stability | Unity-gain stable |
| Supply Voltage Range | 5 V to 15 V (also specified as +/-7.5 V / 15 V) |
| Special Feature | Shutdown / power-down capability |
| Number of Circuits | 1 |
| Gehäuse | 8-pin SOIC (D), 3.9 mm wide body |
| Betriebstemperaturbereich | -40 C to +85 C |
| Montageart | Surface Mount |
| Shutdown Pin | Yes, dedicated power-down control pin |
| Standard Packaging | Tube (per distributor listing) |
THS4215D Pin-Konfiguration
| Pin 1 | -IN — Inverting input |
| Pin 2 | +IN — Non-inverting input |
| Pin 3 | V- — Negative supply (ground on single-supply designs) |
| Pin 4 | NC — Not connected (per datasheet) |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | OUT — Output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | SHUTDOWN — Power-down control input |
Typische Anwendungen
THS4215D ist geeignet für 6 Anwendungs: High-Speed ADC Driver Front End, Video Signal Chain Buffering, Test and Measurement Instrumentation, Active Filter and Frequency Response Networks, DAC Output and Level Shifting, Industrial and Communications Line Drivers.
High-Speed ADC Driver Front End
The THS4215D is used as a unity-gain buffer between a high-speed sampling ADC and its source, because the 1 GHz small-signal bandwidth guarantees flat gain well beyond the converter's Nyquist frequency while the 970 V/us slew rate preserves full-scale output amplitude without slew-induced distortion. Because the amplifier is unity-gain stable, the feedback network can be a direct output-to-inverting-input link, keeping the signal path short and minimising added phase shift at the converter aperture. The 5 V to 15 V supply flexibility allows the driver to sit on the same rail as the converter. Compared with a multi-stage discrete approach, the single SOIC-8 package reduces board area and eliminates inter-stage mismatch, and the shutdown pin lets a multi-channel acquisition board park an idle channel without disturbing the active conversion.
Empfohlen
Video Signal Chain Buffering
For video and graphics boards the THS4215D delivers 1 GHz of small-signal bandwidth with a 970 V/us slew rate, giving ample margin over composite, component, and digital video fundamentals and their harmonics. The low-distortion characteristic matters most at the output stage, where the amplifier must reproduce 0.7 V to 1 V full-scale video waveforms into 75 ohm or high-impedance loads without compression artefacts. Because the device is unity-gain stable, it can be inserted directly into an existing video line as a buffer when impedance levels differ, with only a series matching network and local decoupling added. In multi-channel video routers the shutdown input gives a clean way to mute an inactive output and cut supply current, which is difficult to achieve with older triple video amplifier families.
Empfohlen
Test and Measurement Instrumentation
Instrumentation front ends need amplifiers that preserve the integrity of small, fast signals, and the THS4215D's 1 GHz bandwidth combined with 970 V/us slew rate keeps the closed-loop magnitude error small across the measurement bandwidth. In a bench oscilloscope or a wideband digitiser, the part is typically used as a vertical input buffer or as the drive element for an active probe, where the flat gain and low distortion of the voltage feedback topology avoid the phase non-linearity that would otherwise smear edge measurements. The shutdown pin is valuable in multi-channel instruments because unused input channels can be put into a low-power state between acquisitions. The 5 V single-rail capability also allows the amplifier to run alongside modern low-voltage ADC front ends.
Empfohlen
Active Filter and Frequency Response Networks
The THS4215D is well suited to wideband active filter stages where the signal frequency approaches the amplifier's own bandwidth, because unity-gain stability means the closed-loop noise gain set by the feedback resistors can be kept moderate while the open-loop gain stays high. A 1 GHz bandwidth amplifier allows small-signal filters with passbands in the tens of MHz to be built in a single stage per pole, avoiding the cascading penalty of several lower-bandwidth amplifiers. The 970 V/us slew rate ensures that large filter inputs do not create slew-limited output error, which would otherwise show up as harmonic distortion rather than the expected stopband attenuation. The same reasoning applies to active impedance converters and broadband gain blocks in RF test equipment.
Empfohlen
DAC Output and Level Shifting
Driving a high-speed DAC output into a 50 ohm or 75 ohm terminated line requires both bandwidth and accurate large-signal slew, and the THS4215D supplies 1 GHz of small-signal bandwidth with a 970 V/us slew rate. Because it is unity-gain stable, it can be configured as a simple gain-of-one output stage with a resistive output network, which keeps the distortion contribution of the feedback loop minimal. The 5 V to 15 V supply span lets the output stage be powered from the same rail family as the converter core, simplifying the power tree. In transmitter or waveform-generation equipment the shutdown input allows the output driver to be disabled during calibration phases, removing the need for a separate analog switch in the output path.
Empfohlen
Industrial and Communications Line Drivers
In industrial control and communications equipment the THS4215D is used to drive short, terminated connections at high data rates, where the 1 GHz bandwidth suppresses rise-time degradation across the line and the 970 V/us slew rate keeps the edge rate consistent. Because the part is a single amplifier in a 8-pin SOIC (D) package, several channels fit densely on a line-card PCB, and the shutdown pin allows a channel to be tri-stated in effect by being powered down when the port is idle, which helps meet system-level power targets in dense telecom racks. The wide 5 V to 15 V supply tolerance also allows one amplifier type to serve both 5 V and 12 V rack variants of the same board.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für THS4215D – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | THS4211D | THS4281D | THS4031D | THS4211IPB |
|---|---|---|---|---|---|
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Small-Signal Bandwidth | 1 GHz | 1 GHz | 800 MHz (-20%) | 150 MHz (-85%) | 1 GHz |
| Slew Rate | 970 V/us | 970 V/us | 380 V/us (-61%) | 160 V/us (-84%) | 970 V/us |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 |
Wichtigste Unterscheidungsmerkmale
- Shutdown capability in a 1 GHz amplifier (vs. THS4211D)
- Roughly 2.5x higher slew rate than the closest lower-cost family member (vs. THS4281D)
- Same-package, same-speed drop-in path for supply risk (vs. THS4211IPB)
Designhinweise
At 1 GHz bandwidth, PCB parasitics are part of the amplifier. Keep the feedback resistors directly at the inverting input and output pins, keep the inverting node copper area minimal to reduce stray capacitance that destabilises the loop, and avoid routing the shutdown and input nets beneath or between the amplifier pins. Place the input and output components on the same side of the board with a solid ground plane reference so that high-frequency return currents do not share a path with the sensitive signal return.
Provide local high-frequency decoupling on both supply pins. Use a small, low-inductance ceramic capacitor (for example 100 nF, X7R) placed directly across pins 3 and 7 to the ground plane, and pair it with a bulk capacitor (1 uF or 10 uF) close to the device. The 5 V to 15 V supply flexibility means a single BOM covers several rails, but the bypass network must scale with the total supply span and the transient current demanded by the 970 V/us slew rate.
Do not substitute a lower-bandwidth amplifier into a path that depends on the 1 GHz bandwidth without re-checking the closed-loop gain and the required output amplitude. The most common pitfall is assuming that bandwidth is interchangeable with slew rate: a 800 MHz part with a 380 V/us slew rate will pass small-signal tests yet fail large-signal distortion tests. Similarly, if the shutdown pin is unused, do not leave it floating - tie it to the inactive state so that the amplifier does not enter an undefined operating condition.
A 970 V/us slew rate produces high harmonic content at the output even when the signal bandwidth is small. When driving long traces or radiating cables, terminate the line close to the amplifier, use a series source resistor to slow the edge where the bandwidth budget allows it, and keep the shutdown and control nets filtered. In multi-channel boards, stagger the shutdown sequencing to avoid simultaneous supply-current steps that would disturb shared ground references.
Compliance-Informationen
The verified web data for THS4215D covers the manufacturer product page, distributor listings, and datasheet mirrors, but does not contain explicit RoHS, REACH, lead-free, or halogen-free statements. Compliance fields are therefore set to unknown rather than assumed. AEC-Q100 is marked not_applicable because the device is an industrial-temperature (-40 C to +85 C) analog IC rather than an automotive-qualified part.
