OPA858QIDSGRQ1 - 5.5GHz FET-Input TIA Op-Amp Q1 | TI
料号： OPA858QIDSGRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
OPA858QIDSGRQ1 概述
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.
直接替换替代料： OPA858QIDSGRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： OPA858QIDSGRQ1 （相同外形与封装尺寸） ——差异在于 Amplifier Type, Input Type, Package.
快速对比工具——选择替代料号进行并排对比：
OPA858QDSGRQ1
✅ 直接替换📋 参考替代料（不在目录中）
OPA858DSGR
✅ 直接替换📋 参考替代料（不在目录中）
OPA859QDSGRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA859DSGR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
OPA858QIDSGRQ1 最大额定值与电气特性
| 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) |
| 封装 | 8-WSON (2x2 mm) |
| 安装类型 | Surface Mount |
OPA858QIDSGRQ1 8-wson (2x2 mm) 引脚配置指南
OPA858QIDSGRQ1（8-wson (2x2 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： OPA858QIDSGRQ1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
OPA858QIDSGRQ1 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： OPA858QIDSGRQ1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Highest GBWP in TI FET-input amplifier family （对比 OPA859QDSGRQ1)
- Automotive AEC-Q100 qualification with extended temperature grade （对比 OPA858DSGR)
- FET (CMOS) inputs for high-impedance nodes （对比 OPA859QDSGRQ1)
设计说明
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.
合规信息
Q1 suffix denotes TI automotive product line with AEC-Q100 qualification. Other compliance statuses not stated in provided data - verify on TI product page.
