LMV344QIPWRQ1 - Quad 1MHz Rail-to-Rail Op-Amp | TI Automotive
MPN： LMV344QIPWRQ1 ✓ 啟用中LMV344QIPWRQ1 概覽
An operational amplifier is a high-gain DC-coupled voltage amplifier that, with external feedback networks, performs signal amplification, buffering, filtering, and comparison functions. Within the power-management hierarchy, the LMV344 belongs to the general-purpose low-voltage op-amp family (LMV341/LMV342/LMV344 single/dual/quad), itself a subset of CMOS amplifiers within the broader analog signal-chain category.
Key features include rail-to-rail output swing, which maximizes dynamic range on low-voltage 3.3 V and 5 V rails; 75 mA output current capability, roughly 10x a general-purpose op amp, enabling direct driving of low-impedance loads such as ADC inputs, capacitive loads through isolation resistors, and transmission lines; and operation up to 125C ambient, supporting under-hood and body-electronics environments. The quad configuration saves board space and BOM cost versus four single-channel devices.
The CMOS input architecture provides low input bias current and low quiescent power, while the rail-to-rail output stage minimizes headroom losses near the supply rails. The -Q1 suffix denotes AEC-Q100 qualification and PPAP support for automotive production, distinguishing it from the commercial LMV344.
Typical applications include automotive sensor signal conditioning, battery-current and voltage monitoring front ends, driving ADCs in body-control modules, LED indicator drivers, and audio buffers in instrument clusters. The 75 mA drive also suits speaker or actuator buffer duties at low frequencies.
Design tip: with 75 mA drive capability, verify power dissipation in the small TSSOP-14 package when sourcing high current continuously, and add an isolation resistor (10-50 ohm) when driving large capacitive loads to preserve phase margin. Pricing references are as of 2026-08-29.
直接替換替代品，適用於 LMV344QIPWRQ1 — 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： LMV344QIPWRQ1 （相同外形與佔位） — 差異在於 Output Type, Supply Voltage Range.
LMV344IPWRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
LMV344IPWR
✅ 直接替換聯絡詢價
查看資料表 →MC33204DR2
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TS924IQ2T
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LMV344QIPWRQ1 最大額定值與電氣特性
| Number of Channels | 4 (Quad) |
| Gain-Bandwidth Product | 1 MHz |
| Output Current | 75 mA (high output current) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| 輸出類型 | Rail-to-Rail Output |
| Amplifier Type | CMOS Operational Amplifier |
| Automotive Qualification | AEC-Q100 (Q1) |
| 工作溫度 | -40C to +125C |
| 封裝 | 14-TSSOP (PW) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
LMV344QIPWRQ1 腳位配置
| 腳位 1 | OUT1 — Amplifier 1 output (rail-to-rail) |
| 腳位 2 | -IN1 — Amplifier 1 inverting input |
| 腳位 3 | +IN1 — Amplifier 1 non-inverting input |
| 腳位 4 | V+ — Positive supply, 2.7 V to 5.5 V |
| 腳位 5 | +IN2 — Amplifier 2 non-inverting input |
| 腳位 6 | -IN2 — Amplifier 2 inverting input |
| 腳位 7 | OUT2 — Amplifier 2 output |
| 腳位 8 | OUT3 — Amplifier 3 output |
| 腳位 9 | -IN3 — Amplifier 3 inverting input |
| 腳位 10 | +IN3 — Amplifier 3 non-inverting input |
| 腳位 11 | GND — Ground / negative rail |
| 腳位 12 | +IN4 — Amplifier 4 non-inverting input |
| 腳位 13 | -IN4 — Amplifier 4 inverting input |
| 腳位 14 | OUT4 — Amplifier 4 output |
典型應用
LMV344QIPWRQ1 適用於 6 應用s: Automotive Sensor Signal Conditioning, Battery Current and Voltage Monitoring, ADC Input Buffering and Driving, LED Indicator and Backlight Drivers, Audio Buffering in Instrument Clusters, Industrial Analog Signal Chains.
Automotive Sensor Signal Conditioning
The LMV344QIPWRQ1's AEC-Q100 qualification, -40C to +125C rating, and rail-to-rail output make it a natural front end for automotive resistive and voltage-output sensors such as position, level, and pressure sensors. The 2.7 V to 5.5 V supply range matches 3.3 V and 5 V module rails, while the 75 mA output current allows it to drive ADC inputs or downstream filters directly without an extra buffer stage. Each of the four amplifiers can amplify and offset-shift one sensor channel, saving board space in body-control modules.
推薦
Battery Current and Voltage Monitoring
In 12 V battery-management front ends, the LMV344QIPWRQ1 amplifies shunt-resistor voltages and scales battery-divider voltages into ADC range. The rail-to-rail output maximizes resolution on 3.3 V rails, and the 75 mA drive capability settles large switched-capacitor ADC inputs quickly between conversions. Its AEC-Q100 qualification supports under-hood-adjacent modules, while the low-voltage CMOS input draws negligible bias current that would otherwise corrupt high-impedance shunt measurements.
推薦
ADC Input Buffering and Driving
SAR and delta-sigma ADCs present dynamic, switched-capacitor input loads that demand amplifiers with strong drive and fast settling. The LMV344QIPWRQ1's 75 mA output current and 1 MHz gain-bandwidth let it charge ADC sample capacitors within acquisition windows, while the rail-to-rail output preserves full-scale codes on low-voltage supplies. A series isolation resistor of 10-50 ohm is recommended for large input capacitance to maintain phase margin, per standard TI amplifier-stability practice.
推薦
LED Indicator and Backlight Drivers
The 75 mA per-channel output current allows the LMV344QIPWRQ1 to source or sink LED indicator and small-panel backlight currents directly, eliminating external driver transistors for currents under the op-amp limit. Configured with a sense resistor, each channel becomes a simple linear current regulator; the rail-to-rail output enables control near the supply rails for low-voltage LED strings. This suits interior ambient lighting and instrument-panel indicators in automotive and industrial equipment.
推薦
Audio Buffering in Instrument Clusters
Chime, alert-tone, and low-power speaker signals in instrument clusters benefit from the LMV344QIPWRQ1's rail-to-rail output and 75 mA drive, which let the amplifier deliver meaningful voltage swing into 32-ohm and higher loads from a 5 V rail. The quad package supports stereo or multi-channel paths plus gain stages in one footprint, and AEC-Q100 qualification covers the cluster's temperature environment. Note that 1 MHz gain-bandwidth limits use to audio-band (20 Hz-20 kHz) applications.
推薦
Industrial Analog Signal Chains
Beyond automotive, the LMV344QIPWRQ1 serves industrial PLC I/O cards, transducer interfaces, and 4-20 mA loop transmitters where the rail-to-rail output and 75 mA drive support loop and actuator requirements on 3.3 V or 5 V rails. Its low-voltage CMOS operation reduces quiescent power in multi-channel cards, and the quad configuration halves board area versus single-channel amplifiers. The 125C rating also covers high-temperature industrial enclosures and motor-control cabinets.
推薦
推薦產品摘要
工程參考資料，適用於 LMV344QIPWRQ1 — 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 | LMV344IPWRQ1 | LMV344IPWR | MC33204DR2 |
|---|---|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Channels | 4 | 4 | 4 | 4 |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.2 V to 9 V |
| Gain-Bandwidth | 1 MHz | 1 MHz | 1 MHz | 2.2 MHz |
| AEC-Q100 | Qualified (Q1) | Qualified (Q1) | Not qualified | Qualified (per onsemi) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
主要差異化特點
- 75 mA high output current in a quad package (對比LMV324-Q1 family)
- Automotive AEC-Q100 qualification with PPAP support (對比LMV344IPWR)
- Trade-off: input common-mode not rail-to-rail (對比MC33204DR2)
設計說明
With 75 mA drive capability, check power dissipation: P = (V+ - VOUT) * IOUT per loaded channel. The 14-TSSOP (PW) package has limited thermal relief; at 5 V driving 75 mA continuously, dissipation approaches 200 mW/channel, raising junction temperature noticeably above ambient. Derive worst-case TJ using datasheet theta-JA and keep margin below 150C for reliability in automotive modules.
When driving capacitive loads such as long cables or ADC sample capacitors, add a 10-50 ohm series isolation resistor at the output to preserve phase margin; the 75 mA drive stage can otherwise ring or oscillate with large capacitive loads. Keep feedback paths short and place gain-setting resistors close to the -IN pins to limit stray capacitance at 1 MHz bandwidth.
Do not confuse the commercial LMV344IPWR with the -Q1 part in automotive BOMs - qualification and traceability requirements demand the Q1 suffix. Also note the LMV344 is rail-to-rail OUTPUT only; inputs are not rail-to-rail, so ensure input common-mode stays within the datasheet range, especially near the positive rail, to avoid output phase inversion or degraded accuracy.
合規資訊
Q1 suffix denotes AEC-Q100 automotive qualification per TI product page. RoHS/lead-free status per standard TI automotive product offering; detailed REACH/halogen data should be confirmed on ti.com product pages.
