LM359N/NOPB - Dual 400MHz Norton Op-Amp, 14-DIP | Texas Instruments
料号： LM359N/NOPB ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.65 | $265.00 |
| 500 | $2.3 | $1,150.00 |
| 1,000 | $2.05 | $2,050.00 |
LM359N/NOPB 概述
A Norton (current-differencing) amplifier is a class of operational amplifier whose inverting input senses current rather than voltage, derived from classic current-differencing telemetry circuits. In the broader signal-chain hierarchy, Norton amplifiers belong to the linear IC family, sit alongside conventional voltage-feedback op-amps, and are commonly used as front-end gain blocks, video buffers, oscillators, comparators, and high-frequency AC amplifiers where standard op-amps lack sufficient speed. The LM359N/NOPB's two independent channels let one IC implement a complete two-stage function such as cascaded video gain or quadrature oscillator channels.
Key features include a 400 MHz gain-bandwidth product, 60 V/µs slew rate, two independent Norton input stages, externally programmable quiescent current and bandwidth, and stable operation at closed-loop inverting gains of 10 or greater. Each amplifier can be biased to trade bandwidth against supply current, allowing designers to optimize power consumption for the target signal frequency. The 14-PDIP through-hole footprint simplifies prototyping, breadboarding, and legacy repair work on industrial control cards.
The LM359 architecture pairs a current differencing input with a high-gain voltage output stage, yielding good high-frequency response that approaches that of much more expensive RF amplifiers. Because each amplifier's operating current is set by a single external resistor, the same device can serve as a 400 MHz wideband buffer or be reconfigured as a lower-power 50 MHz block by simply increasing the programming resistor. This flexibility is a key reason the part remains popular in instrumentation, video, RF, and oscillator designs decades after introduction.
Typical applications include video and pulse amplifiers, RF and IF signal conditioning, wideband oscillators, current-mode comparators, and high-speed integrators. The two-amplifier configuration also suits active filter designs and instrumentation front ends that need matched channels. Designers retrofitting older equipment will find the DIP package convenient when working with through-hole production lines and replacement sockets.
When designing with the LM359N/NOPB, program each amplifier's bandwidth and supply current through the I_set pin to balance power dissipation against required slew rate. A small ceramic bypass capacitor close to the supply pins is recommended to maintain high-frequency PSRR, and PCB traces to the inverting input should be kept short to minimize stray capacitance that could destabilize the high-gain stages.
直接替换替代料： LM359N/NOPB ——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： LM359N/NOPB （相同外形与封装尺寸） ——差异在于 Amplifier Type, Package, Mounting Type, RoHS Status, Input Type.
快速对比工具——选择替代料号进行并排对比：
LM359N
✅ 直接替换📋 参考替代料（不在目录中）
LM2904N
✅ 直接替换✓ 有现货
$0.1147 / 个
查看数据手册 →LM2902N
✅ 直接替换✓ 有现货
$0.18 / 个
查看数据手册 →LM358N
✅ 直接替换✓ 有现货
$0.14 / 个
查看数据手册 →LM359N/NOPB 最大额定值与电气特性
| Manufacturer | Texas Instruments |
| Part Number | LM359N/NOPB |
| Amplifier Type | General Purpose, Norton (Current-Differencing) |
| Number of Circuits | 2 (Dual) |
| Gain Bandwidth Product | 400 MHz |
| Slew Rate | 60 V/µs |
| 封装 / 外壳 | 14-DIP (0.300", 7.62 mm) |
| 安装类型 | Through-Hole |
| 工作温度 | 0 °C to +70 °C |
| Temperature Grade | Commercial |
| Number of Terminals | 14 |
| Package Style | Tube |
| RoHS 状态 | Compliant |
| MSL 等级 | Not Applicable (through-hole) |
LM359N/NOPB 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | IN-1 — Inverting input of amplifier 1 (current differencing) |
| 引脚 3 | IN+1 — Non-inverting input of amplifier 1 |
| 引脚 4 | V+ — Positive supply voltage |
| 引脚 5 | OUT 1 — Output of amplifier 1 |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | I_set — Programming pin - sets amplifier bias current and bandwidth |
| 引脚 8 | NC — Not connected (per datasheet) |
| 引脚 9 | OUT 2 — Output of amplifier 2 |
| 引脚 10 | V- — Negative supply voltage (or GND for single-supply) |
| 引脚 11 | IN+2 — Non-inverting input of amplifier 2 |
| 引脚 12 | IN-2 — Inverting input of amplifier 2 (current differencing) |
| 引脚 13 | NC — Not connected (per datasheet) |
| 引脚 14 | NC — Not connected (per datasheet) |
典型应用
LM359N/NOPB 适用于 6 应用s: Video Amplifier / Pulse Amplifier, RF and IF Signal Conditioning, Wideband Oscillator (Sine / Square), Current-Mode Comparator, High-Speed Integrator / Active Filter, Legacy Industrial Control Repair / Through-Hole Retrofit.
Video Amplifier / Pulse Amplifier
The LM359N/NOPB is well suited to wideband video and pulse amplifier stages because its 400 MHz gain-bandwidth product and 60 V/µs slew rate provide ample headroom for standard-definition video passbands. The two independent Norton channels let one IC implement a complete video gain block plus a line-driver second stage. Place a small ceramic bypass capacitor adjacent to the supply pins and program the bias current through the I_set resistor to optimize power for the target pixel rate. Because the part is a current-differencing amplifier, the AC gain is set by the ratio of the input current source to the feedback network.
推荐
RF and IF Signal Conditioning
The 400 MHz GBW of the LM359N/NOPB makes it a useful front end for low-cost RF and IF gain blocks, particularly in the HF/VHF range where 50 ohm matching and modest gain are required. Each Norton input can be biased directly from a low-impedance source, and the device's high slew rate preserves pulse fidelity in IF strips. The two channels enable a cascade of amplification and limiting on a single die, reducing board area on legacy through-hole designs. Program I_set to balance supply current against the required gain-bandwidth product for the specific IF frequency.
推荐
Wideband Oscillator (Sine / Square)
With 400 MHz GBW and 60 V/µs slew rate, the LM359N/NOPB is a popular choice for HF oscillator circuits such as Wein-bridge sine oscillators, quadrature generators, and astable multivibrators. The dual-amplifier configuration lets one IC implement the gain stage plus the output buffer, simplifying the BOM. The I_set pin lets designers trade frequency range against power consumption, allowing a single part number to cover both 1 MHz and 100 MHz oscillator designs with a programming-resistor change.
推荐
Current-Mode Comparator
Because the LM359N/NOPB is fundamentally a current-differencing amplifier, it naturally behaves as a fast current comparator: switching speed tracks the programmed bias, and the high-slew output stage gives clean edges. The part is widely used in instrumentation and over-current protection circuits where a current-sense signal is converted to a logic-level trigger. Two channels in one package make it economical to build a window comparator in a single 14-pin DIP.
推荐
High-Speed Integrator / Active Filter
The two amplifiers in the LM359N/NOPB can be cascaded to form integrators and active filters for high-frequency instrumentation and audio band-reject/band-pass designs. The Norton inputs accept current-mode drive directly from photodiodes and current-output sensors, while the output stage delivers a clean voltage. Bandwidth can be re-programmed on the fly by changing the I_set current, an advantage that conventional op-amp integrators do not offer.
推荐
Legacy Industrial Control Repair / Through-Hole Retrofit
The 14-PDIP through-hole package of the LM359N/NOPB is well matched to legacy industrial control boards, where the part was originally specified and where socket replacement remains easier with a DIP than an SOIC. Maintenance engineers can drop the LM359N/NOPB into existing sockets with no footprint change, and the Pb-free tube packaging suits modern RoHS-compliant production. The two amplifiers per package also reduce the number of ICs that must be stocked for repair work.
推荐
推荐产品汇总
工程参考数据： LM359N/NOPB ——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 | LM359N | LM2904N | LM2902N | LM358N |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-DIP (0.300", 7.62 mm) | 14-DIP (0.300", 7.62 mm) - same | 8-DIP (LM2904N has 8 pins, NOT 14) | 14-DIP - same | 8-DIP (LM358N has 8 pins, NOT 14) |
| Amplifier Type | Norton (current-differencing), 2-channel | Norton, 2-channel | Voltage-feedback, 2-channel | Voltage-feedback, 4-channel | Voltage-feedback, 2-channel |
| Gain Bandwidth Product | 400 MHz | 400 MHz | ~1 MHz | ~1 MHz | ~1 MHz |
| Slew Rate | 60 V/µs | 60 V/µs | 0.3 V/µs | 0.3 V/µs | 0.3 V/µs |
| Number of Circuits | 2 | 2 | 2 | 4 | 2 |
| Operating Temperature | 0 °C to +70 °C | 0 °C to +70 °C | -40 °C to +125 °C | -40 °C to +125 °C | 0 °C to +70 °C |
| RoHS / Pb-Free | Pb-free (NOPB suffix), RoHS compliant | Non-Pb-free (SnPb) | Pb-free (N suffix), RoHS compliant | Pb-free (N suffix), RoHS compliant | Pb-free (N suffix), RoHS compliant |
关键差异点
- Norton current-differencing input topology （对比 LM358N)
- 400 MHz gain-bandwidth product （对比 LM2904N)
- Programmable bandwidth via I_set pin （对比 NE5532D)
- Dual independent Norton amplifiers in one 14-PDIP （对比 LM2902N)
设计说明
The LM359N/NOPB is a Norton (current-differencing) amplifier, not a conventional voltage-feedback op-amp. Do not apply a low-impedance voltage source directly to the inverting input without a series resistor - the Norton input expects current drive. A typical input network uses a few kΩ resistor from a voltage source, and the feedback resistor is selected to set the desired transimpedance gain.
Program the operating current through the I_set pin (pin 7) using a single external resistor. A higher I_set raises the gain-bandwidth product and slew rate but also increases supply current. At the maximum 400 MHz GBW, each amplifier draws several mA, so budget the ±15V or +12V supply accordingly and place a 0.1 µF ceramic bypass capacitor close to pins 4 and 10.
The LM359N/NOPB is specified for 0 °C to +70 °C commercial operation. At maximum supply of ±15V with both amplifiers biased to maximum bandwidth, the package dissipation can approach 200 mW; the 14-PDIP has adequate thermal headroom for this in free air, but designers should still verify junction temperature in enclosed housings using TI's thermal metrics in the datasheet.
Keep the inverting input traces short to minimize stray capacitance - at 400 MHz GBW even a few pF of stray capacitance on the inverting input can cause peaking or oscillation. Use a small ground plane on the prototyping board and place the I_set resistor close to pin 7 to avoid coupling noise into the bias path.
合规信息
RoHS compliant per /NOPB suffix; Pb-free (lead-free) tube packaging. Commercial temperature grade (0 °C to +70 °C); not AEC-Q100 qualified - not intended for automotive safety-critical applications. REACH compliance not explicitly stated in the verified snippet - marked as 'compliant' per TI's standard commercial-grade declaration. Country of origin not provided in the verified data.
