LT319AN#PBF - 80ns Dual Comparator, 14-PDIP | Analog Devices
部品番号: LT319AN#PBF ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.23 | $3.23 |
| 10 | $3.23 | $32.30 |
| 100 | $3.23 | $323.00 |
| 500 | $3.23 | $1,615.00 |
| 1,000 | $3.23 | $3,230.00 |
LT319AN#PBF 概要
A comparator is a high-gain analog signal-conditioning IC that evaluates two input voltages and produces a digital logic result indicating which input is higher. The LT319A belongs to the comparator hierarchy, which supports general-purpose analog and mixed-signal systems: comparator -> analog signal IC -> integrated circuit -> semiconductor. Its open-collector output requires an external pull-up resistor and can interface with systems using open-collector, open-emitter, or TTL-compatible signaling.
Key features include two comparators per package, an 80 ns response time, a guaranteed maximum 0.5 mV input offset voltage, and 25 mA output drive capability. The single 5 V operating capability is useful for low-voltage logic systems, while the ±15 V supply capability supports higher-voltage analog and industrial control circuits. Input protection diodes help limit input stress, although external protection and supply-decoupling checks remain necessary in the final design.
The LT319A architecture is intended for threshold detection, level translation, pulse generation, and high-speed switching decisions. Because the outputs are open collector, the output high level depends on the pull-up network and system voltage rather than an internal active pull-up. This makes the device adaptable to different logic families, but it also requires correct resistor selection and confirmation that the driven node meets the timing and current requirements of the receiving circuit.
Typical applications include industrial control and automation, sensor threshold detection, pulse-width and timing circuits, level conversion, waveform conditioning, and embedded control systems. The 14-pin PDIP package is mechanically straightforward for through-hole assembly, prototyping, and repair. Its dual-channel configuration also reduces package count when two independent decisions are required in one circuit.
When designing around the LT319AN#PBF, verify supply polarity, common-mode input limits, output pull-up values, and the maximum transition rate required by the downstream logic. Place bypass capacitors close to the supply pins and keep comparator input traces short to reduce noise pickup. The open-collector outputs can pull a logic node low but cannot source current, so a suitable pull-up resistor is mandatory.
This page combines verified manufacturer and distributor data with practical comparator design guidance, application fit, package information, and drop-in replacement considerations for engineers evaluating the LT319AN#PBF.
ドロップイン代替品: LT319AN#PBF — 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: LT319AN#PBF （同一形状・フットプリント） — 相違点: Comparator Type, Mounting Type, Number of Channels, Package.
クイック比較ツール — 並列比較する代替部品を選択:
LT319AN
✅ ドロップイン✓ 在庫あり
$3.23 / 個
データシートを見る →LT119AN#PBF
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LM319N/NOPB
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT119AN
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
LM319N
✅ ドロップイン📋 参考代替品（カタログ未掲載）
LT319AN#PBF 最大定格＆電気的特性
| Comparator Type | General Purpose |
| Number of Comparators | 2 |
| Response Time | 80 ns |
| IC Output Type | Open Collector |
| Output Compatibility | Open-Collector, Open-Emitter, TTL |
| 電源電流 | 8 mA |
| Supply Voltage Range | 5 V to ±15 V |
| Maximum Input Offset Voltage | 0.5 mV |
| Output Drive Capability | 25 mA |
| Input Protection | Input protection diodes |
| Number of Channels | 2 |
| パッケージ | 14-PDIP |
| 実装タイプ | Through Hole |
| Comparator Class | Dual precision comparator |
| Single-Supply Operation | 5 V |
| Output State | Open collector with external pull-up required |
LT319AN#PBF 14-pdip ピン配置ガイド
LT319AN#PBF (14-pdip パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: LT319AN#PBF.
詳細は データシート をご参照ください。
主な用途
LT319AN#PBF の用途: 6 件s: Industrial Automation Threshold Detection, Pulse and Timing Control, Level Translation and Logic Interfacing, Sensor Signal Conditioning, Waveform Shaping and Edge Detection, Embedded Control and Instrumentation.
Industrial Automation Threshold Detection
The LT319AN#PBF fits industrial threshold-detection circuits that need two independent decisions in one through-hole package. Its verified 80 ns response time allows the comparator to react quickly when a sensor or control signal crosses a reference level, while the maximum specified 0.5 mV input offset helps keep the switching point close to the intended threshold. Use each open-collector output with an appropriate pull-up resistor so the result can drive a controller input or logic node. The main design consideration is confirming the input common-mode range at the actual supply voltage and keeping sensor traces away from switching power nodes.
おすすめ
Pulse and Timing Control
The LT319AN#PBF is suitable for pulse-width, edge, and timing control because its dual-channel architecture provides two comparator decisions without requiring two separate packages. The verified 80 ns response time is useful when the circuit must make a fast decision around a reference ramp or timing node, and the 25 mA drive capability supports current transitions at the output pull-up network. Because the outputs are open collector, choose the pull-up value to balance sink current against the required rise time. Confirm downstream receiver limits and avoid excessive capacitance on timing-critical output nodes.
おすすめ
Level Translation and Logic Interfacing
The LT319AN#PBF can support level translation when a system needs a comparator-defined logic result rather than a fixed-voltage buffer. Its open-collector output can be pulled up to the voltage required by the receiving logic, making the interface flexible across open-collector, open-emitter, and TTL-compatible arrangements identified in the verified data. The 8 mA supply-current specification helps define the power budget, but the pull-up resistor determines the output high level and rise time. Verify absolute maximum voltage, input limits, and output sink-current requirements against the complete manufacturer datasheet before production use.
おすすめ
Sensor Signal Conditioning
The LT319AN#PBF can turn a conditioned sensor signal into a clean digital event when the application needs fast thresholding. Its two comparators allow complementary or independent sensor decisions, and the specified 0.5 mV maximum input offset provides a useful starting point when defining the switching threshold. The open-collector outputs are convenient for wired alarm or interlock signals because the node can be pulled up to the system logic voltage. For noisy sensor environments, use shielding, filtering, and short comparator input traces; also verify that the sensor signal remains inside the permitted common-mode range.
おすすめ
Waveform Shaping and Edge Detection
The LT319AN#PBF is appropriate for waveform shaping when a clean digital transition is needed from a bipolar or single-supply analog waveform. Its verified 80 ns response time supports rapid edge decisions, while the dual-channel configuration can detect both rising and falling events or compare two independent signal levels. The output is open collector, so an external pull-up resistor is required and its value controls the output rise time. Keep the input network short, use appropriate source impedance, and check comparator input protection limits when the source can overshoot the supply rails.
おすすめ
Embedded Control and Instrumentation
The LT319AN#PBF can support embedded instrumentation, measurement, and control loops that require fast binary decisions around analog thresholds. The dual comparator package reduces board-space requirements compared with two separate single comparators, and the 14-PDIP format is useful for prototypes and repairable through-hole assemblies. The 0.5 mV maximum specified offset is meaningful for close-threshold measurement, but system accuracy also depends on the reference, resistor tolerances, noise, and input filtering. Use a clean reference and decouple the supply close to the device before interpreting small threshold differences.
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: LT319AN#PBF — 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 | LT319AN | LT119AN#PBF | LM319N/NOPB | LM319N |
|---|---|---|---|---|---|
| Number of Comparators | 2 | 2 | 2 | 2 | 2 |
| Package | 14-PDIP | 14-PDIP | 14-PDIP | 14-PDIP | 14-PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
主な差別化要因
- Dual comparator in one through-hole package （vs LM319N/NOPB)
- Verified fast response time （vs LM319N/NOPB)
- Single-supply and bipolar-range flexibility （vs LT319AN)
設計ノート
The LT319AN#PBF output is open collector, so a pull-up resistor is required on each output used as a logic signal. Do not treat the output as a push-pull driver. Select the resistor to balance output sink current, receiver input current, node capacitance, and the required rise time. Verify that the downstream device accepts the pulled-up voltage and that the comparator can sink the maximum current during a low output state.
Place the bypass capacitor close to the comparator supply pins and keep input traces short, especially when the threshold difference is small. Route sensitive comparator inputs away from switching nodes, relay contacts, power inductors, and high-current return paths. A compact ground return helps reduce noise pickup and prevents the input offset specification from being degraded by board-level interference.
Before applying power, check the selected supply arrangement against the verified 5 V to ±15 V range and the complete datasheet’s input and output absolute maximum limits. The verified supply current is 8 mA, but total current also includes pull-up current and the load driven by each open-collector output. Estimate worst-case dissipation and ensure the 14-PDIP through-hole package is not placed next to a heat source without adequate airflow.
For fast threshold decisions, minimize input capacitance and use a stable reference source. The verified 80 ns response time does not remove the need to account for propagation delay, reference settling, pull-up RC time, and downstream receiver delay. Use an oscilloscope to verify the complete decision path when the output timing or switching threshold is critical.
コンプライアンス情報
The supplied verified snippets identify the LT319AN#PBF and LT319A family but do not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The part is an analog comparator IC, so AEC-Q100 is treated as not applicable rather than qualified.
