LMV344IPWR - Quad 1MHz Rail-to-Rail CMOS Op Amp | TI
部品番号: LMV344IPWR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.75 | $0.75 |
| 10 | $0.68 | $6.80 |
| 100 | $0.55 | $55.00 |
| 500 | $0.49 | $245.00 |
| 1,000 | $0.45 | $450.00 |
LMV344IPWR 概要
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and single-ended output, used for amplification, filtering, and signal conditioning. The LMV344IPWR belongs to the CMOS op amp category within the linear amplifier family of analog ICs, a fundamental building block of analog signal processing in the power management and sensor front-end hierarchy.
Key features include rail-to-rail output swing, which maximizes dynamic range in low-voltage single-supply systems, and a shutdown mode that reduces supply current for battery-powered designs. A PMOS input stage provides an ultra-low input bias current of 1pA (typical) and 0.25mV typical input offset voltage, making the part suitable for high-impedance sensor interfaces. Despite low quiescent power (100uA per amplifier typical), the device can source/sink up to 75mA output current, unusual for such a low-power op amp.
Technically, the CMOS architecture with PMOS input contributes to high input impedance and low bias current, while the rail-to-rail output stage allows output swing close to both supply rails, critical where headroom is limited. The device is specified over the industrial temperature range of -40C to +125C.
Typical applications include battery-powered instrumentation, portable medical devices, sensor signal conditioning, and active filters in 3V or 5V systems. AEC-Q100 qualified LMV344QIPWRQ1 extends use to automotive designs.
When designing, decouple supply pins with 0.1uF ceramic capacitors placed close to the IC, and tie the shutdown pin to the correct logic level to avoid unintended shutdown. Prices as of 2026-08-30 start near $0.49 at LCSC.
ドロップイン代替品: LMV344IPWR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LMV344IPWR （同一形状・フットプリント） — 相違点: Output Type, Supply Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
LMV344IPWRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LMV344QIPWRQ1
✅ ドロップイン✓ 在庫あり
$0.36 / 個
データシートを見る →LMV324IPWR
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MCP6244-E/ST
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LMV934IPWR
⚡ 同一パッケージ ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LMV344IPWR 最大定格＆電気的特性
| Amplifier Type | CMOS Operational Amplifier |
| Number of Circuits | 4 |
| Gain Bandwidth Product | 1 MHz |
| Slew Rate | 1 V/us |
| Supply Voltage Range | 2.5 V to 5.5 V |
| Output Current per Channel | 75 mA |
| Input Bias Current | 1 pA (typical, PMOS input) |
| Input Offset Voltage | 0.25 mV (typical) |
| 出力タイプ | Rail-to-Rail |
| Quiescent Current per Amplifier | 100 uA (typical) |
| Shutdown | Yes |
| 動作温度 | -40C to +125C |
| パッケージ | 14-TSSOP (PW) |
| 実装タイプ | Surface Mount |
| ピン数 | 14 |
| RoHS ステータス | Compliant |
LMV344IPWR ピン構成
| ピン 1 | OUT1 — Amplifier 1 output |
| ピン 2 | IN1- — Amplifier 1 inverting input |
| ピン 3 | IN1+ — Amplifier 1 non-inverting input |
| ピン 4 | V+ — Positive supply, 2.5V to 5.5V |
| ピン 5 | IN2+ — Amplifier 2 non-inverting input |
| ピン 6 | IN2- — Amplifier 2 inverting input |
| ピン 7 | OUT2 — Amplifier 2 output |
| ピン 8 | OUT3 — Amplifier 3 output |
| ピン 9 | IN3- — Amplifier 3 inverting input |
| ピン 10 | IN3+ — Amplifier 3 non-inverting input |
| ピン 11 | V- / GND — Negative supply or ground in single-supply use |
| ピン 12 | IN4+ — Amplifier 4 non-inverting input |
| ピン 13 | IN4- / SD — Shutdown control per LMV344 datasheet [DATA_NEEDED: exact SD pin assignment] |
| ピン 14 | OUT4 — Amplifier 4 output |
主な用途
LMV344IPWR の用途: 6 件s: Battery-Powered Instrumentation, Portable Medical Devices, Sensor Signal Conditioning, Active Filters, Automotive Sensor Front Ends, Portable Audio Signal Chains.
Battery-Powered Instrumentation
The LMV344IPWR fits portable instrumentation because its 100uA-per-amplifier quiescent current and shutdown mode directly extend battery runtime, while 75mA output drive handles load switches and display bias that typical micropower op amps cannot. Used as a quad signal-conditioning front end between sensor bridges and a 12-bit ADC such as the ADS1115, the rail-to-rail output maximizes usable dynamic range on a single 3V cell rail. The trade-off is a modest 1MHz bandwidth, which is ample for sensor signals but not for fast video.
おすすめ
Portable Medical Devices
Portable diagnostic and patient-monitoring products benefit from the LMV344IPWR's 1pA typical input bias current, which prevents loading of high-impedance biosensor electrodes, and from its low 0.25mV offset for accurate DC measurements. The 2.5V to 5.5V supply range matches single-Li-ion or coin-cell rails, and the 75mA output per channel can drive status LEDs or vibration feedback elements directly. Each amplifier channel can be independently assigned (amplify, filter, buffer), consolidating four signal-chain functions into one TSSOP-14, reducing BOM and board area.
おすすめ
Sensor Signal Conditioning
The PMOS input stage with 1pA bias current and 0.25mV offset makes the LMV344IPWR well suited to photodiode, piezoelectric, and high-value-resistive sensor interfaces where input current error dominates accuracy. With four amplifiers, designers can implement transimpedance amplification, Sallen-Key anti-alias filtering, gain staging, and ADC buffering in one package feeding the ADS131M08 or similar delta-sigma converter. The rail-to-rail output ensures the full ADC input span is usable even from a 3.3V rail; the 1MHz GBW limits closed-loop bandwidth to roughly 100kHz at gain 10.
おすすめ
Active Filters
With 1MHz gain bandwidth and 1V/us slew rate, the LMV344IPWR implements Sallen-Key and multiple-feedback active filters with accurate corner frequencies up to tens of kilohertz, adequate for audio and instrumentation anti-aliasing. The quad configuration lets one package realize two independent second-order filter stages. Rail-to-rail output prevents clipping distortion at low 3V or 5V supplies, and the 75mA drive tolerates low filter output impedance. Designers should budget for GBW derating: at gain of 10, expect bandwidth near 100kHz per the gain-bandwidth product.
おすすめ
Automotive Sensor Front Ends
For automotive designs, the AEC-Q100 qualified LMV344QIPWRQ1 is the pin-to-pin drop-in choice in the same 14-TSSOP package, allowing one PCB design to serve both consumer and automotive builds. Typical automotive roles include conditioning signals from pressure, position, and current sensors into MCU ADC inputs such as those on the TMS320F28003x family. The industrial -40C to +125C range covers under-hood-adjacent zones, while shutdown limits quiescent draw when the vehicle is off, an important spec for always-connected modules.
おすすめ
Portable Audio Signal Chains
The LMV344IPWR can serve gain staging, tone-shaping filtering, and line-output buffering in battery-powered audio accessories. Its rail-to-rail output preserves headroom on 3.3V to 5V rails, and the unusual 75mA per-channel drive can directly drive headphone-level loads or the input of power amplifiers like the TPA3116D2DADR. The 1MHz GBW keeps distortion low at audio frequencies (20Hz to 20kHz consumes only 2% of available bandwidth), and shutdown mutes the signal path and cuts power between use sessions for extended standby battery life.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LMV344IPWR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LMV344IPWRG4 | LMV344QIPWRQ1 | LMV324IPWR | MCP6244-E/ST | LMV934IPWR |
|---|---|---|---|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP - same | 14-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology | Texas Instruments |
| Gain Bandwidth | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 550 kHz | 1.25 MHz |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Shutdown | Yes | Yes | Yes | No | No | No |
| Output Type | Rail-to-Rail Output | Rail-to-Rail Output | Rail-to-Rail Output | Rail-to-Rail Output | Rail-to-Rail Output | Rail-to-Rail Output |
| Automotive Grade | No (Q1 variant available) | No | Yes (AEC-Q100) | No | No | No |
主な差別化要因
- 75mA output current in a micropower op amp （vs LMV934IPWR)
- Built-in shutdown for battery power savings （vs LMV324IPWR)
- AEC-Q100 automotive path on same footprint （vs MCP6244-E/ST)
設計ノート
Place a 0.1uF ceramic decoupling capacitor within 2-3mm of the V+ pin (pin 4) with a low-impedance return to V- (pin 11). With four amplifiers sharing one supply pin, simultaneous output transients up to 75mA per channel can couple through the supply; adding 4.7uF bulk capacitance nearby suppresses interaction between channels in multi-stage signal chains.
The shutdown pin must be driven to a defined logic level. Leaving it floating can place the amplifiers in an indeterminate state, causing intermittent channel dropout that is difficult to diagnose. Verify the exact shutdown pin location and active level in the LMV344 datasheet before layout, and confirm its polarity differs from standard non-shutdown quad op amp pinouts when substituting LMV324.
With 1MHz gain bandwidth, closed-loop bandwidth is roughly GBW divided by noise gain: about 100kHz at gain of 10, 10kHz at gain of 100. Do not design filter corners or gain stages assuming the full 1MHz is available. Slew rate of 1V/us limits full-power output to about 16kHz peak at 10Vpp equivalent swing; account for this in large-signal audio or pulsing applications.
Quiescent current is approximately 100uA per amplifier but total supply current rises sharply when driving 75mA loads. In battery designs, budget load current separately from quiescent current, and use the shutdown mode during idle periods. The rail-to-rail output cannot quite reach the rails under load; expect tens of millivolts of drop at high output current.
コンプライアンス情報
RoHS compliant per DigiKey listing; G4 suffix denotes TI green/RoHS packaging. AEC-Q100 qualified variant available as LMV344QIPWRQ1. REACH status [DATA_NEEDED: REACH declaration].
