NJM844V-TE1 - Quad 3.5MHz High-Speed Op-Amp | Nisshinbo
MPN： NJM844V-TE1 ✓ 啟用中NJM844V-TE1 概覽
What is a high-speed single-supply op-amp? A high-speed single-supply operational amplifier is a general-purpose analog IC that operates from a single positive rail (as well as dual supplies) and provides GBW in the multi-MHz range with slew rates above 5 V/us. These parts belong to the linear amplifier IC family, which sits within the broader category of amplifier ICs and analog signal conditioning. They are widely used as building blocks between sensors, ADCs, DACs, and downstream analog stages where traditional low-speed op-amps cannot keep up with fast transients.
Key features of the NJM844V-TE1 include a low offset voltage and low offset voltage drift, four independent amplifiers in one 14-SSOP body, output swing to within ~1.5 V of each rail, and a wide operating temperature range of -40 C to +85 C suitable for industrial environments. The unity-gain stable output stage drives 1000 pF loads directly, simplifying buffer and cable-driver designs without external compensation.
The NJM844 internal architecture uses bipolar input stages optimized for single-supply operation, with input common-mode range that extends to the negative rail. This makes the part an effective choice for ground-referenced signal-chain blocks such as current-sense amplifiers, transducer buffers, and active filters powered from a 5 V or 12 V rail.
Typical applications include power-supply unit control loops, general-purpose inverters, high-side current sensing, motor-control signal conditioning, and active filtering. The 8.5 V/us slew rate is sufficient for audio bandwidth with substantial margin, and the quad format lets one IC replace four discrete op-amps, saving PCB area in multi-channel sensor front ends.
When designing with this part, observe the input common-mode range (signals must stay above V- and below V+ - 1.5 V) and provide adequate bypassing on each supply pin. The -TE1 suffix indicates tape-and-reel packaging for high-volume SMT assembly.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes not found in the manufacturer datasheet.
直接替換替代品，適用於 NJM844V-TE1 — 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： NJM844V-TE1 （相同外形與佔位） — 差異在於 Amplifier Type, Gain Bandwidth Product, Operating Temperature, Packaging, Slew Rate.
NJM844V-TE2
✅ 直接替換📋 參考替代品（不在目錄中）
NJM844M-TE1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
LM324DR2G
✅ 直接替換聯絡詢價
查看資料表 →LM2902DR
✅ 直接替換📋 參考替代品（不在目錄中）
MC3303DR2G
✅ 直接替換📋 參考替代品（不在目錄中）
NJM844V-TE1 最大額定值與電氣特性
| Manufacturer | Nisshinbo Micro Devices Inc. |
| Part Status | Active |
| Amplifier Type | Standard (General Purpose) |
| Number of Circuits | 4 |
| Slew Rate | 8.5 V/us (typical) |
| Gain Bandwidth Product | 3.5 MHz (typical) |
| Supply Voltage Range (Single) | 3 V to 36 V |
| Supply Voltage Range (Dual) | +/-1.5 V to +/-18 V |
| 工作溫度 | -40 C to +85 C |
| 輸出類型 | Rail-to-rail (approaching rails, within ~1.5 V) |
| Unity-Gain Stable | Yes, with up to 1000 pF load |
| 封裝 / 外殼 | 14-SSOP |
| 安裝類型 | Surface Mount |
| Supplier Device Package | SSOP-14 |
| Packaging | Tape & Reel (TE1 suffix) |
| RoHS 狀態 | Compliant (per distributor listings) |
NJM844V-TE1 腳位配置
| 腳位 1 | OUTPUT A — Channel A amplifier output |
| 腳位 2 | INVERTING INPUT A — Channel A inverting input |
| 腳位 3 | NON-INVERTING INPUT A — Channel A non-inverting input |
| 腳位 4 | V+ (VCC) — Positive supply voltage |
| 腳位 5 | NON-INVERTING INPUT B — Channel B non-inverting input |
| 腳位 6 | INVERTING INPUT B — Channel B inverting input |
| 腳位 7 | OUTPUT B — Channel B amplifier output |
| 腳位 8 | OUTPUT C — Channel C amplifier output |
| 腳位 9 | INVERTING INPUT C — Channel C inverting input |
| 腳位 10 | NON-INVERTING INPUT C — Channel C non-inverting input |
| 腳位 11 | V- (GND) — Negative supply or ground for single-supply operation |
| 腳位 12 | NON-INVERTING INPUT D — Channel D non-inverting input |
| 腳位 13 | INVERTING INPUT D — Channel D inverting input |
| 腳位 14 | OUTPUT D — Channel D amplifier output |
典型應用
NJM844V-TE1 適用於 6 應用s: Power Supply Unit (PSU) Control Loops, Industrial Sensor Signal Conditioning, Motor Control Current Sensing, Active Filters and Audio Signal Processing, General-Purpose Inverter Signal Chain, Test & Measurement Front-End Buffering.
Power Supply Unit (PSU) Control Loops
The NJM844V-TE1 fits PSU control-loop applications because its 3.5 MHz GBW and 8.5 V/us slew rate provide ample phase margin at typical crossover frequencies of 10-100 kHz used in switching converter compensation networks. Its 3 V to 36 V single-supply range allows direct connection to 5 V, 12 V, 24 V, and 36 V rails without level shifting. Each of the four channels can implement error amplifier, current-sense amplifier, soft-start reference buffer, and housekeeping comparator in one IC, reducing BOM and PCB area. Unity-gain stability with 1000 pF loads simplifies Type-II and Type-III compensation designs and makes the part tolerant of MOSFET gate capacitance when used as a gate-driver buffer.
推薦
Industrial Sensor Signal Conditioning
For industrial sensor signal conditioning, the NJM844V-TE1's quad channel count, single-supply operation, and 3.5 MHz GBW make it ideal for buffering strain-gauge bridges, thermocouples, and 4-20 mA current loops. The input common-mode range extending to the negative rail allows ground-referenced single-supply operation critical for shunt current monitors and low-side sensor interfaces. The 8.5 V/us slew rate preserves fast transient edges from Hall-effect sensors and encoders without slew-induced distortion. The 14-SSOP package is footprint-compatible with industry-standard LM324 layouts, allowing direct drop-in performance upgrades in legacy industrial PLC and sensor-interface boards.
推薦
Motor Control Current Sensing
The NJM844V-TE1 is well suited to motor-control current-sensing applications where 8.5 V/us slew rate and 3.5 MHz GBW accurately reproduce PWM-edge current transients in brushless DC (BLDC) and stepper motor drives. The 3 V to 36 V supply range accommodates 5 V, 12 V, and 24 V motor bus rails directly, and the quad channel count handles all three phase current shunts plus one over-current comparator in a single IC. The part's ability to drive 1000 pF loads allows direct connection to MCU ADC inputs with anti-aliasing filters without instability, simplifying PCB layout in compact motor-control boards.
推薦
Active Filters and Audio Signal Processing
The NJM844V-TE1 fits active filter and audio signal-processing applications where the 3.5 MHz GBW supports multi-kHz Sallen-Key and Multiple-Feedback (MFB) filter topologies well into the audio band, while the 8.5 V/us slew rate ensures low distortion on fast musical transients. Four channels per package enable stereo two-pole or four-pole crossover networks in a single IC, simplifying audio crossover designs for portable speakers and PA systems. Unity-gain stability with 1000 pF capacitive loads tolerates long PCB trace capacitance in mixed-signal audio boards without oscillation. The single-supply 3 V-36 V range also supports direct headphone-amplifier output stages powered from a single Li-ion or 24 V industrial rail.
推薦
General-Purpose Inverter Signal Chain
The NJM844V-TE1 is suitable for general-purpose inverter signal-chain applications, including voltage-mode and current-mode feedback amplifiers, comparator stages, and reference buffers, all within a single quad package. Its wide 3 V-36 V supply range handles 12 V and 24 V battery-backed inverter systems without additional regulation, and the 3.5 MHz GBW preserves switching-frequency harmonics for accurate feedback-loop compensation. The -40 C to +85 C operating range supports outdoor solar inverter and motor-drive enclosures. The 14-SSOP package is footprint-compatible with the LM324 family, making it an upgrade path for legacy inverter designs needing higher bandwidth and slew rate.
推薦
Test & Measurement Front-End Buffering
For test-and-measurement front-end buffering, the NJM844V-TE1 provides 3.5 MHz GBW and 8.5 V/us slew rate that preserve signal integrity in oscilloscope probe buffers, data-acquisition front ends, and bench multimeter signal-conditioning paths. The quad format lets one IC implement input buffer, gain stage, offset adjustment, and output driver for a complete analog front-end channel. The wide 3 V-36 V single-supply range supports battery-powered handheld instruments and bench-top lab supplies alike. Unity-gain stability with 1000 pF loads allows direct driving of long shielded cables without oscillation, a common concern in T&M applications.
推薦
推薦產品摘要
工程參考資料，適用於 NJM844V-TE1 — 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 | NJM844V-TE2 | NJM844M-TE1 | LM324DR | LM2902DR | MC3303DR2G |
|---|---|---|---|---|---|---|
| Brand | Nisshinbo Micro Devices Inc. | Nisshinbo Micro Devices Inc. | Nisshinbo Micro Devices Inc. | Texas Instruments | Texas Instruments | onsemi |
| Package | 14-SSOP | 14-SSOP | 14-SOP | 14-SOIC | 14-SOIC | 14-SOIC |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 3.5 MHz | 3.5 MHz | 3.5 MHz | 1.3 MHz | 1.3 MHz | 1.0 MHz |
| Slew Rate | 8.5 V/us | 8.5 V/us | 8.5 V/us | 0.4 V/us | 0.4 V/us | 0.6 V/us |
| Single Supply Range | 3 V to 36 V | 3 V to 36 V | 3 V to 36 V | 3 V to 32 V | 3 V to 32 V | 3 V to 36 V |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C | -40 C to +125 C | -40 C to +85 C |
| Unity-Gain Stable | Yes (up to 1000 pF) | Yes (up to 1000 pF) | Yes (up to 1000 pF) | Yes | Yes | Yes |
| Approx. Unit Price (USD, 2026-10-09) | $1.85 | $1.85 | $1.90 | $0.16 | $0.18 | $0.32 |
主要差異化特點
- Significantly higher GBW and slew rate vs LM324 family (對比LM324DR)
- Same 14-SSOP pinout as LM324 family for direct drop-in (對比LM324DR, LM2902DR, MC3303DR2G)
- Wider single-supply range to 36 V (對比LM324DR)
設計說明
Decouple the NJM844V-TE1 with a 100 nF ceramic capacitor placed within 5 mm of the V+ pin (pin 4) and a 10 uF bulk capacitor on the same supply trace. The 3.5 MHz GBW makes the part sensitive to supply noise; inadequate bypassing can couple into the output as high-frequency ripple. For dual-supply operation, place a 100 nF bypass close to the V- pin (pin 11) as well, with a star-ground topology to avoid digital ground return currents flowing through the analog ground reference.
Keep input traces short and away from switching nodes (MOSFET drains, rectifier diodes) to minimize capacitive pickup. The 8.5 V/us slew rate will faithfully amplify any high-frequency noise on the input, and long traces can introduce parasitic inductance that destabilizes the feedback loop. For the unity-gain buffer configuration, place the feedback resistor (typically 0 ohm or a small 10-100 ohm isolation resistor) directly at the inverting input pin to minimize stray capacitance.
The NJM844V-TE1 is unity-gain stable up to 1000 pF of capacitive load, including MOSFET gate capacitance and long cable capacitance. When driving loads above 1000 pF, insert a 10-100 ohm isolation resistor between the op-amp output and the capacitive load to prevent oscillation. For Sallen-Key or MFB active filters, simulate the closed-loop response with the actual capacitor types (C0G/NP0 recommended) to avoid filter-Q peaking that could push the loop beyond the part's phase-margin limits.
Estimated: at single-supply 24 V with the input common-mode range approaching V+ (within ~1.5 V of the positive rail), the input stage can distort if the input signal exceeds V+ - 1.5 V. For signals that need to swing to within a few hundred mV of the positive rail, use a rail-to-rail input op-amp such as the TLC2274 instead. The input bias current is bipolar-type, so high-impedance source resistances (above 100 kohm) can introduce offset errors; use lower-impedance sensor interfaces or add bias-current compensation resistors.
合規資訊
RoHS and lead-free compliance confirmed via Nisshinbo Micro Devices product page and distributor listings (DigiKey, Mouser). Not AEC-Q100 qualified - this part targets industrial and commercial applications, not automotive. Halogen-free status and conflict-minerals statement not explicitly published in available data; flagged as unknown.
