OPA858QIDSGRQ1 - 5.5GHz FET-Input TIA Op-Amp Q1 | TI
MPN: OPA858QIDSGRQ1 ✓ AktifOPA858QIDSGRQ1 Ringkasan
A decompensated amplifier is an operational amplifier internally compensated for stable operation only above a minimum closed-loop gain (here 7 V/V). By removing the compensation for unity-gain stability, the decompensated topology achieves dramatically higher bandwidth and lower input-referred noise than unity-gain-stable amplifiers of comparable process technology. In the signal-chain hierarchy, the OPA858-Q1 sits as a wideband voltage-feedback amplifier serving transimpedance amplifier (TIA) and high-gain voltage amplifier roles in high-speed analog front ends.
Key features include the 5.5-GHz GBWP that enables high closed-loop bandwidths at transimpedance gains in the range of tens to hundreds of kilo-ohms, FET inputs that minimize input bias current effects on photodiode and high-impedance nodes, and single-ended single-channel configuration optimized for high-speed signal paths. The Q1 variant is manufactured on TI automotive flows and is qualified per AEC-Q100, supporting automotive lidar, imaging, and test applications that demand supply-chain traceability and automotive-grade reliability.
The architecture combines CMOS input devices with wideband voltage-feedback internals, yielding low input capacitance that is critical in TIA designs because photodiode plus amplifier input capacitance directly limits achievable bandwidth per unit of transimpedance gain. TI provides the OPA858 together with a companion evaluation module and application collateral covering feedback resistor selection, compensation capacitor sizing, and stability analysis.
Typical applications include automotive lidar receiver TIAs, wideband photodiode amplification in optical sensing, high-speed voltage amplification stages, and wideband test and measurement front ends. The device suits any signal chain that requires gain of 7 V/V or higher with multi-hundred-megahertz to gigahertz-class bandwidth.
Design consideration: because the amplifier is only stable at gain >= 7 V/V, noise-gain analysis must be performed at all frequencies, including input capacitance effects at the inverting node; verify phase margin with the TI datasheet stability curves before finalizing feedback-network values.
Alternatif penggantian untuk OPA858QIDSGRQ1 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian OPA858QIDSGRQ1 (sama faktor bentuk dan footprint) — berbeda di dalam Amplifier Type, Input Type, Package.
OPA858QDSGRQ1
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
OPA858DSGR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
OPA859QDSGRQ1
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
OPA859DSGR
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
OPA858QIDSGRQ1 Rating Maksimal & Karakteristik Listrik
| Gain Bandwidth Product | 5.5 GHz |
| Minimum Stable Gain | 7 V/V |
| Input Type | FET (CMOS) |
| Amplifier Type | Voltage Feedback, Decompensated |
| Number of Channels | 1 |
| Configuration | Single-Ended |
| Typical Application | Transimpedance Amplifier (TIA), Wideband Voltage Amplifier |
| Transimpedance Gain Range | Tens to hundreds of kilo-ohms |
| Qualification | AEC-Q100 (Automotive Q1) |
| Paket | 8-WSON (2x2 mm) |
| Tipe Mounting | Surface Mount |
OPA858QIDSGRQ1 8-wson (2x2 mm) Diamant Konfigurasi Panduan
Konfigurasi pin untuk OPA858QIDSGRQ1 (8-wson (2x2 mm) pakai pakai). Komponen analog ini memiliki pin masukan, keluaran, dan pengirim daya. Lihat datasheet produsen untuk konfigurasi pin offset null, kompensasi, dan pengaktifan. Ideal untuk peralatan sinyal dan kabel penggandaran.
Tidak ada data diatribut pin yang tersedia untuk OPA858QIDSGRQ1.
Lihat ke: datasheet produk untuk konfigurasi pin penuh.
Aplikasi Umum
OPA858QIDSGRQ1 cocok untuk 6 aplikasis: Automotive Lidar Receiver TIA, Wideband Photodiode Amplification, High-Speed Voltage Amplification, Test and Measurement Front Ends, Optical Communication Receivers, Ultrasonic and Sensor Signal Chains.
Automotive Lidar Receiver TIA
The OPA858QIDSGRQ1 fits automotive lidar photodiode receivers because its 5.5-GHz GBWP and FET inputs support high closed-loop bandwidth at transimpedance gains of tens to hundreds of kilo-ohms, directly determining range resolution. As a TIA, the photodiode feeds the inverting node with a large feedback resistor; the decompensated topology at gain >= 7 V/V maximizes bandwidth per transimpedance. AEC-Q100 qualification makes it deployable in production vehicles.
Direkomendasikan
Wideband Photodiode Amplification
For optical sensing and instrumentation, the OPA858QIDSGRQ1 amplifies photodiode currents across hundreds of megahertz. Its FET inputs draw negligible bias current, preserving accuracy at high-impedance nodes, while low input capacitance preserves bandwidth. Placed immediately after the photodiode in a TIA configuration with optimized feedback resistance and compensation capacitance, it converts weak optical signals into usable voltage with high fidelity and minimal added noise.
Direkomendasikan
High-Speed Voltage Amplification
As a voltage amplifier at closed-loop gains of 7 V/V and above, the OPA858QIDSGRQ1 delivers gigahertz-class bandwidth for high-speed signal chains such as oscilloscope front ends and wideband gain blocks. The decompensated design trades unity-gain stability for maximum bandwidth-noise performance. Designers must verify noise gain across frequency, including capacitive effects at the inverting input, to guarantee phase margin per the TI stability analysis in the datasheet.
Direkomendasikan
Test and Measurement Front Ends
In bench and modular instrumentation, the OPA858QIDSGRQ1 provides the wideband, low-noise first stage that sets system noise floor and bandwidth. Its 5.5-GHz GBWP supports multi-hundred-MHz signal paths at gains of tens of V/V, and the compact 2x2 mm WSON package suits dense module layouts. Careful ground-plane design and short input traces are essential to realize datasheet-grade performance in measurement equipment.
Direkomendasikan
Optical Communication Receivers
Short-reach optical links benefit from the OPA858QIDSGRQ1 as a post-photodiode TIA stage where bandwidth in the hundreds of megahertz to gigahertz range is required. FET inputs minimize shot-noise-degrading bias currents, and the high GBWP allows tens of kilo-ohms transimpedance with usable bandwidth. The supply should be filtered with low-noise LDOs because PSRR degrades at high frequency, making post-regulation ripple rejection important.
Direkomendasikan
Ultrasonic and Sensor Signal Chains
High-frequency ultrasonic and impedance-sensing front ends use the OPA858QIDSGRQ1 for wideband gain stages following transducers. The gain-of-7 stability threshold matches typical receive-chain gains, and FET input impedance avoids loading resonant transducers. The automotive Q1 grade extends suitability into in-vehicle sensing modules such as ultrasonic park-assist receivers where AEC-Q100 components are mandated by platform requirements.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk OPA858QIDSGRQ1 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | OPA858QDSGRQ1 | OPA858DSGR | OPA859QDSGRQ1 |
|---|---|---|---|---|
| Package | 8-WSON (2x2 mm) | 8-WSON (2x2 mm) - same | 8-WSON (2x2 mm) - same | 8-WSON (2x2 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Gain Bandwidth Product | 5.5 GHz | 5.5 GHz | 5.5 GHz | ~1.8 GHz |
| Minimum Stable Gain | 7 V/V | 7 V/V | 7 V/V | Lower (easier to stabilize) |
| Input Type | FET (CMOS) | FET (CMOS) | FET (CMOS) | FET input |
| AEC-Q100 (Automotive Q1) | Yes | Yes | No (commercial grade) | Yes |
| Number of Channels | 1 | 1 | 1 | 1 |
| Primary Application | Wideband TIA / voltage amplifier | Wideband TIA / voltage amplifier | Wideband TIA / voltage amplifier (commercial) | Moderate-bandwidth TIA / amplifier |
Diferensiator Kunci
- Highest GBWP in TI FET-input amplifier family (vsOPA859QDSGRQ1)
- Automotive AEC-Q100 qualification with extended temperature grade (vsOPA858DSGR)
- FET (CMOS) inputs for high-impedance nodes (vsOPA859QDSGRQ1)
Catatan Desain
As a decompensated amplifier stable only at gain >= 7 V/V, the OPA858QIDSGRQ1 requires full-frequency noise-gain analysis. Photodiode capacitance and stray inverting-node capacitance raise noise gain at high frequency and can erode phase margin. Place the feedback network directly at the pins, minimize inverting-node trace area, and verify stability with the TI datasheet phase-margin curves before finalizing Rf and Cf values.
The 8-WSON (2x2 mm) package has an exposed die-pad/thermal structure that must be soldered to a grounded copper pour. Use multiple thermal vias to the ground plane for heat dissipation and low-inductance grounding. Keep input and output traces short and impedance-controlled for gigahertz-class signals, and place 100 nF plus bulk supply decoupling capacitors within 2 mm of the supply pins.
Amplifier PSRR falls at high frequency, so switching-regulator ripple passes directly into the signal path. Power the OPA858QIDSGRQ1 from a low-noise LDO (e.g., TPS7A8300 or TPS7A4701) followed by ferrite-bead and ceramic-capacitor filtering. Simulate or measure the supply rail noise floor; microvolts of ripple at the amplifier supply can appear at the TIA output and limit sensitivity in lidar receivers.
Informasi Konformitas
Q1 suffix denotes TI automotive product line with AEC-Q100 qualification. Other compliance statuses not stated in provided data - verify on TI product page.
