LMP8350MA/NOPB-Q1 - Ultra-Low Distortion ADC Driver | TI
料号： LMP8350MA/NOPB-Q1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.16 | $316.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.53 | $2,530.00 |
LMP8350MA/NOPB-Q1 概述
A fully-differential amplifier (FDA) is a special-purpose amplifier that processes and outputs a differential signal, converting single-ended inputs to differential outputs with excellent common-mode rejection. FDAs are the preferred interface between single-ended analog sources and differential-input ADCs because they cancel common-mode noise, improve dynamic range, and maintain balance in the signal chain.
The defining feature of the LMP8350 is its unique mode-enable pin, which lets the designer choose among three operating modes that trade power consumption for dynamic performance. The high-power mode is optimized for the highest AC performance and ultra-low distortion, while lower-power modes save current in battery-powered or thermally constrained systems. As an ADC driver for data acquisition, it achieves very low harmonic distortion suitable for driving precision and high-speed converters.
According to the TI datasheet (LMP8350, 36-page document), the device is engineered for driving high-performance precision ADCs in data acquisition systems. Its differential architecture, selectable power modes, and precision DC performance make it a strong fit where signal integrity is paramount.
Typical applications include precision data acquisition front ends, industrial process control, test and measurement instrumentation, and medical imaging signal chains - anywhere a single-ended or differential source must drive a differential ADC input without degrading THD or SNR.
Design tip: the selected power mode affects both bandwidth and distortion, so verify THD at your target frequency and gain in the chosen mode, and keep the mode pin driven from a defined logic level for deterministic startup.
直接替换替代料： LMP8350MA/NOPB-Q1 ——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： LMP8350MA/NOPB-Q1 （相同外形与封装尺寸） ——差异在于 Package / Case.
快速对比工具——选择替代料号进行并排对比：
LMP8350MAX/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
THS4531A
⚡ 相同封装 ⚠️ 规格未核验✓ 有现货
$1.82 / 个
查看数据手册 →THS4532
⚡ 相同封装 ⚠️ 规格未核验✓ 有现货
$1.85 / 个
查看数据手册 →AD8138
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LMP8350MA/NOPB-Q1 最大额定值与电气特性
| Type | ADC Driver IC (fully-differential amplifier) |
| Applications | Data Acquisition |
| 封装 / 外壳 | 8-SOIC (0.154 in, 3.90 mm Width) |
| 工作温度范围 | -40C to +85C |
| Amplifier Type | Fully-Differential, Ultra-Low Distortion |
| Power Modes | 3 selectable modes via mode enable pin (PowerWise) |
| Family | LMP precision amplifier family |
| 安装类型 | Surface Mount |
| Packaging | Tube |
| Lead Free Status | Lead Free |
| RoHS 状态 | RoHS Compliant |
LMP8350MA/NOPB-Q1 引脚配置
| 引脚 1 | OUT- — Differential output, negative side |
| 引脚 2 | IN- — Inverting input |
| 引脚 3 | VS- — Negative supply |
| 引脚 4 | VOCM — Output common-mode voltage setting |
| 引脚 5 | FB — Feedback connection |
| 引脚 6 | IN+ — Non-inverting input |
| 引脚 7 | VS+ — Positive supply |
| 引脚 8 | OUT+ — Differential output, positive side / mode enable (verify per datasheet) |
典型应用
LMP8350MA/NOPB-Q1 适用于 6 应用s: Precision Data Acquisition Front End, Industrial Process Control, Test and Measurement Instrumentation, Medical Signal Acquisition, Battery-Powered Portable Instruments, Automotive Data Acquisition (Q1 variant consideration).
Precision Data Acquisition Front End
The LMP8350's core purpose is driving high-performance precision ADCs, converting single-ended or differential sensor outputs into a balanced differential signal that maximizes ADC SNR and THD. Its ultra-low distortion specification keeps harmonic content below the converter's noise floor in 16- to 18-bit acquisition systems. The three selectable power modes let a DAQ system run in high-power mode during conversions and drop to a lower-power mode between scans, saving system-level energy without a second amplifier stage. Place it immediately before the ADC input with a small RC filter to absorb sampled charge kickback.
推荐
Industrial Process Control
In industrial analog modules, transducer signals must travel to a controller ADC with minimal added distortion and drift. The LMP8350's -40C to +85C rating and fully-differential architecture reject common-mode noise picked up on long field wiring, improving measurement repeatability. Its PowerWise mode-enable feature allows multi-channel systems to bias only active channels at high performance. The 8-SOIC package fits dense analog terminal boards where board area is constrained. Use 1% gain-setting resistors and a clean low-noise supply to preserve the amplifier's precision over the full industrial temperature range.
推荐
Test and Measurement Instrumentation
Bench instruments, digitizers, and automated test equipment require signal chains whose distortion contributions stay far below the device under test's error budget. The LMP8350's ultra-low distortion in high-power mode makes it well suited as the ADC driver in digitizer front ends operating into 16-bit-plus converters. The selectable power modes let battery-powered portable instruments extend runtime while reserving full AC performance for capture events. Its fully-differential output also improves immunity to ground potential differences between analog front end and converter sections in rack-based systems. Characterize THD at your exact frequency and gain using the datasheet curves.
推荐
Medical Signal Acquisition
Medical diagnostic equipment such as patient monitors and imaging front ends demands clean differential signal paths with very low harmonic content so physiological features are not masked by amplifier-induced artifacts. The LMP8350's fully-differential topology cancels common-mode interference from mains coupling and nearby switching supplies, while its ultra-low distortion preserves waveform fidelity into precision converters. The selectable power modes help portable and wearable medical devices balance measurement quality against battery life. Note the +85C upper operating limit is well beyond body-temperature requirements, and always apply the isolation and safety design practices mandated for patient-connected equipment.
推荐
Battery-Powered Portable Instruments
Portable analyzers and handheld meters benefit directly from the LMP8350's PowerWise architecture: the mode enable pin allows firmware to switch between a low-power monitoring state and a high-performance measurement state on demand, something fixed-bias amplifiers cannot do. This avoids the classic compromise of over-biasing an amplifier all day just to meet peak distortion specs during a short acquisition window. The compact 8-SOIC also conserves PCB area in handheld enclosures. Design the mode pin with a defined logic drive or pulldown so the device always powers up in a known state, and verify settle time after mode transitions in your acquisition firmware timing.
推荐
Automotive Data Acquisition (Q1 variant consideration)
For automotive-grade data acquisition nodes, the -Q1 suffix on the requested part number suggests a qualification path, but the verified web data covers only the standard LMP8350MA/NOPB; confirm AEC-Q100 status directly with TI before automotive deployment. Within the -40C to +85C verified range, the device suits in-cabin and bench-level acquisition: its differential drive rejects alternator and inverter noise common in vehicle power environments, and the ultra-low distortion supports high-resolution current, position, and acoustic sensing into precision ADCs. Use star-grounded analog layout and RC filtering after the amplifier to survive conducted transients on the sensor path.
推荐
推荐产品汇总
工程参考数据： LMP8350MA/NOPB-Q1 ——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 | LMP8350MAX/NOPB | THS4531A | AD8138 |
|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC (3.90 mm) - same | SOIC-8 / VSSOP-8 (verify footprint) | SOIC-8 (verify pinout) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Amplifier Type | Ultra-low distortion fully-differential | Identical die | Low-power fully-differential, RRO | Fully-differential, G=1 |
| Selectable Power Modes | 3 modes (mode enable pin) | 3 modes (identical) | Powerdown (150 uA) | None |
| Drop-in Compatible | Reference | Yes (100%) | No - PCB review required | No - pinout not confirmed |
关键差异点
- Three selectable power modes via a single pin （对比 AD8138)
- Ultra-low distortion focus for precision ADCs （对比 THS4531A)
- PowerWise family architecture （对比 LMP8350MAX/NOPB)
设计说明
The LMP8350's distortion performance depends on the selected power mode, gain, and load. Use the high-power mode when driving precision ADCs at higher input frequencies, and confirm THD from the datasheet typical curves at your exact conditions. Keep gain-setting resistors at 1% tolerance or better, and keep the feedback loop area small to minimize parasitic capacitance that degrades distortion.
Place a 0.1 uF ceramic decoupling capacitor directly at each supply pin plus bulk 2.2 uF to 10 uF locally. Keep the VOCM pin decoupled with 0.1 uF to stabilize the output common-mode. Route differential output traces as matched pairs to the ADC, with a short RC (e.g., 10-25 ohm and small C) between amplifier outputs and ADC inputs to isolate sampled charge kickback.
Drive the mode enable pin from a defined logic level at all times - a floating mode pin can cause the amplifier to start in an unintended power mode or oscillate during startup. Also, the operating range is -40C to +85C; do not assume automotive grade from the -Q1 request string without written TI confirmation, since the verified data covers only the standard LMP8350MA/NOPB.
合规信息
RoHS compliant and lead free per distributor data (DigiKey/digchip). AEC-Q100 qualification for the -Q1 suffix not confirmed in verified data.
