THS4504D - 260MHz Fully Differential Amplifier | Texas Instruments
MPN： THS4504D ✓ 啟用中THS4504D 概覽
A fully differential amplifier is an amplifier IC that accepts a differential input and produces balanced differential outputs. Its architecture belongs to the operational-amplifier and buffer-amplifier hierarchy, where it provides common-mode rejection, symmetric signal paths, and controlled output common-mode voltage. This makes it particularly useful in communication, instrumentation, and analog-to-digital converter front ends where reducing differential-mode and common-mode distortion is important.
Key performance features include 260 MHz small-signal bandwidth, 1800 V/µs slew rate, third-order intermodulation distortion of -73 dBc at 30 MHz, and output third-order intercept point of 29 dBm at 30 MHz. The device supports a 15 V total supply range that can include a negative supply rail, while its operating temperature range is -40°C to +85°C. A shutdown function helps reduce power consumption when the signal chain is inactive.
The fully differential architecture provides balanced outputs and an output common-mode control function, making THS4504D suitable for driving high-speed analog-to-digital converters through resistive networks or transformer interfaces. Its bandwidth and distortion performance support 12-bit operation through 40 MHz according to the Texas Instruments product-page description. Designers should still verify signal settling, output swing, common-mode range, and external-component requirements against the manufacturer datasheet for the exact operating conditions.
Typical applications include high-speed data acquisition, communications receivers, differential analog front ends, and instrumentation chains. In these systems, the amplifier can suppress common-mode noise, maintain differential balance, and provide the slew rate needed for rapidly changing waveforms. The shutdown feature is useful in portable, test-and-measurement, and power-sequenced systems where continuous operation is unnecessary.
A critical design consideration is preserving differential symmetry. Input and output component networks should use matched layouts and values, the output common-mode voltage must remain within the valid range, and the PCB should minimize parasitic capacitance between differential nodes. Stable power-supply decoupling and careful grounding are necessary to prevent supply noise or board asymmetry from degrading distortion performance.
This page combines the verified manufacturer and distributor information for THS4504D with practical application guidance, specification comparisons, and drop-in-replacement analysis. The supplied cross-reference search did not establish five distinct pin-compatible alternatives, so the engineering analysis avoids presenting unverified substitutes as drop-in parts.
直接替換替代品，適用於 THS4504D — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： THS4504D （相同外形與佔位）.
THS4505DG4
✅ 直接替換📋 參考替代品（不在目錄中）
THS4504D 最大額定值與電氣特性
| Product Type | Fully differential amplifier |
| Amplifier Circuit Count | 1 circuit |
| Differential Architecture | Fully differential |
| Small-Signal Bandwidth | 260 MHz |
| Slew Rate | 1800 V/µs |
| Third-Order Intermodulation Distortion | -73 dBc at 30 MHz |
| Output Third-Order Intercept Point | 29 dBm at 30 MHz |
| Total Supply Voltage Range | 15 V |
| Negative Supply Rail Support | Supported |
| Output Common-Mode Control | Supported |
| Shutdown Capability | Supported |
| Supported ADC Resolution and Frequency | 12-bit operation through 40 MHz |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 8-pin SOIC (D) |
| 安裝類型 | Surface mount |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
THS4504D 8-pin soic (d) 腳位配置指南
THS4504D（8-pin soic (d) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： THS4504D.
請參閱 資料表 以查看完整腳位配置。
典型應用
THS4504D 適用於 6 應用s: High-Speed Differential Data Acquisition, Communications Receiver Signal Chain, Instrumentation and Measurement Front End, Portable Diagnostic and Monitoring Equipment, Industrial Test and Measurement, Balanced Audio and Video Signal Conditioning.
High-Speed Differential Data Acquisition
The THS4504D fits high-speed differential data-acquisition front ends because its fully differential architecture, 260 MHz bandwidth, and 1800 V/µs slew rate preserve the differential balance required by high-speed converters. Texas Instruments specifically describes support for 12-bit operation through 40 MHz. The device can sit ahead of an ADC through a matched resistive network, with its common-mode output adjusted to the converter input range. Designers should verify converter bandwidth, settling, kickback, and recommended network values, while preserving symmetry between the positive and negative signal paths. Its shutdown function can also reduce consumption during acquisition idle periods.
推薦
Communications Receiver Signal Chain
The THS4504D is appropriate for communications receivers where a low-noise, balanced signal must be conditioned before digitization or further processing. Its 260 MHz bandwidth provides margin above a 40 MHz 12-bit signal path, while the listed -73 dBc third-order intermodulation distortion and 29 dBm output third-order intercept point support linearity-sensitive designs. The fully differential implementation helps reject common-mode interference and produces balanced outputs for downstream circuitry. Layout must remain electrically symmetric, and output swing, common-mode range, and termination values must be confirmed from the manufacturer datasheet for the selected supply and load conditions.
推薦
Instrumentation and Measurement Front End
The THS4504D can amplify low-level differential signals in instrumentation when the required signal bandwidth exceeds the capabilities of general-purpose precision amplifiers. Its 260 MHz bandwidth and 1800 V/µs slew rate allow it to process fast sensor and transducer outputs without the slew limitation of slower operational amplifiers. Fully differential operation preserves signal polarity and rejects shared-mode disturbance, while output common-mode control provides flexibility when driving subsequent converter stages. The practical benefit is reduced analog-channel complexity, although system designers must still account for sensor noise, source impedance, gain error, and the amplifier's DC operating-point limits.
推薦
Portable Diagnostic and Monitoring Equipment
The shutdown capability of the THS4504D is useful in portable diagnostic and monitoring equipment where the high-speed signal path operates only during selected measurement intervals. Its 260 MHz bandwidth allows the device to handle broadband differential sensors, while its fully differential outputs simplify connection to balanced ADC inputs. Powering down the amplifier when measurements are not active can reduce system energy use without redesigning the analog path. The benefit depends on the actual shutdown behavior and available supply levels, which should be checked in the manufacturer datasheet. Signal-chain isolation and controlled startup are also necessary to prevent transients from disturbing adjacent channels.
推薦
Industrial Test and Measurement
The THS4504D is well matched to industrial test systems that combine wideband differential excitation, signal conditioning, and digitization. Its 260 MHz bandwidth supports rapid pulses and high-frequency test signals, while 1800 V/µs slew rate reduces distortion on fast edges. The balanced architecture limits common-mode pickup and can improve measurement repeatability when the DUT, cable, and input network are also balanced. Shutdown permits unused channels to be placed in a lower-power state when a multichannel fixture does not require continuous operation. Fixture designers must control impedance, connector transitions, grounding, and component matching to retain the amplifier's specified distortion performance.
推薦
Balanced Audio and Video Signal Conditioning
The THS4504D can serve as a high-speed balanced signal-conditioning element in professional audio, video, and other low-distortion differential interfaces. Its fully differential inputs and outputs minimize common-mode conversion, and the listed third-order distortion of -73 dBc at 30 MHz provides a defined starting point for frequency-dependent linearity evaluation. The 260 MHz bandwidth is much broader than typical audio-band requirements, allowing the same device to be evaluated for higher-bandwidth balanced systems. Designers must nevertheless verify output swing, slew-induced distortion at the actual signal amplitude, noise behavior, and stability with the selected load and termination network.
推薦
推薦產品摘要
工程參考資料，適用於 THS4504D — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | THS4505D | THS4505DR | THS4504DR |
|---|---|---|---|---|
| Product Type | Fully differential amplifier | Fully differential amplifier | Fully differential amplifier | Fully differential amplifier |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin SOIC (D) | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Shutdown Capability | Yes | No | No | Yes |
主要差異化特點
- Shutdown capability distinguishes the selected device from the related THS4505 (對比THS4505D)
- Wideband bandwidth supports high-speed differential data acquisition (對比THS4505D)
- High slew rate reduces edge-rate distortion in fast signals (對比THS4504DR)
- Fully differential implementation provides balanced signal handling (對比THS4505D)
設計說明
Preserve differential symmetry from the input source through the feedback and output networks. Use identical routing geometry, spacing, and component placement for the positive and negative branches, and keep the feedback loops compact. A grounded or via-fenced ground plane can reduce inductance and common-mode pickup, but excessive ground vias directly beneath sensitive differential nodes may increase parasitic capacitance and upset impedance control.
Place the supply bypass capacitors immediately beside the power terminals and provide a low-impedance return path for high-frequency current. The THS4504D supports a negative supply rail, so both positive and negative rails require suitable decoupling when used. Keep analog and digital return currents separated where possible, and verify ground bounce because supply impedance can translate directly into differential-output distortion in this wideband, high-slew-rate amplifier.
Do not treat the THS4505 as a drop-in substitute for the THS4504 merely because both are related 8-pin fully differential amplifiers. Texas Instruments documents the THS4504 as having shutdown capability and the THS4505 as lacking it. Verify every terminal function, output-common-mode requirement, supply arrangement, and stability condition in the ordered datasheet before substituting either device.
Check output swing, output common-mode voltage, load impedance, and feedback-network values at the intended supply voltage and signal frequency. The verified 260 MHz bandwidth and 1800 V/µs slew rate describe the device capability, not guaranteed performance in every board environment. Add output isolation or termination only when its loading effect is included in the signal-integrity simulation, and use controlled-impedance routing for longer differential interconnects.
合規資訊
The supplied manufacturer and distributor excerpts do not provide explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations for THS4504D. The stated -40°C to +85°C operating range does not establish AEC-Q100 qualification.
