LM393DR2GH - Dual Low-Offset Comparator | onsemi
部品番号: LM393DR2GH ✓ 生産中LM393DR2GH 概要
A voltage comparator is an analog integrated circuit that compares two input voltages and produces a digital logic result indicating which input is higher. The LM393 belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Its open-collector outputs can sink current while operating in a wired-OR configuration, making it especially useful for simple sensing, threshold detection, and system-level protection circuits.
The two channels operate independently, allowing one package to implement two unrelated threshold functions. The 36 V maximum total supply rating supports both conventional single-supply operation and split-supply arrangements. The common-mode input range extends to ground with single-supply operation, while the open-collector output stage provides flexible interfacing with pull-up resistors and external loads.
The low input offset voltage improves the accuracy of comparisons near their reference thresholds. An offset voltage as low as 2.0 mV means the comparator can resolve relatively small differential inputs, which is beneficial in window detectors, sensor interfaces, and protection circuits operating close to a reference voltage. The open-collector architecture avoids push-pull output contention when multiple detector outputs are combined.
Typical applications include battery-voltage monitoring, overvoltage and undervoltage protection, temperature-sensor threshold detection, industrial control interfaces, and logic-level translation. The two independent channels can also monitor separate signals when their grounding and supply conditions remain compatible. A pull-up resistor is required on each output because the open-collector transistor does not actively drive a high output voltage.
Designers should account for input common-mode limits, output pull-up values, output sink current, and the maximum differential input voltage when defining the circuit. Place bypass capacitance close to the supply pins and keep sensitive input traces away from switching nodes. Because the output is open collector, its rising-edge speed depends on the pull-up resistor, load capacitance, and total wiring capacitance.
This product page consolidates the principal electrical characteristics, package details, pin assignments, application guidance, and verified drop-in comparison options. It also highlights practical differences among standard, improved, low-voltage, and low-power LM393-family choices to support faster design selection and board-level sourcing decisions.
ドロップイン代替品: LM393DR2GH — 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: LM393DR2GH （同一形状・フットプリント） — 相違点: Number of Channels, Comparator Type, Input Offset Voltage, Package, Response Time.
LM393DT
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LM393LV
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LMV393
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LM393DR2GH 最大定格＆電気的特性
| Comparator Type | Dual independent precision voltage comparator |
| Number of Channels | 2 channels |
| Supply Configuration | Single or split supply |
| Maximum Total Supply Voltage | 36 V |
| Common-Mode Input Range | To ground with single-supply operation |
| Input Offset Voltage | 2.0 mV maximum |
| 出力タイプ | Open collector |
| Output Compatibility | TTL, CMOS, and open-collector logic interfacing |
| Number of Inputs | 4 inputs total |
| 出力数 | 2 outputs |
| パッケージ | 8-pin SOIC |
| 実装タイプ | Surface mount |
| Automotive Qualification | Consumer and automotive applications supported |
LM393DR2GH ピン構成
| ピン 1 | OUT1 — Comparator 1 open-collector output |
| ピン 2 | IN-1 — Comparator 1 inverting input |
| ピン 3 | IN+1 — Comparator 1 non-inverting input |
| ピン 4 | GND — Ground connection |
| ピン 5 | IN+2 — Comparator 2 non-inverting input |
| ピン 6 | IN-2 — Comparator 2 inverting input |
| ピン 7 | OUT2 — Comparator 2 open-collector output |
| ピン 8 | VCC — Positive supply connection |
主な用途
LM393DR2GH の用途: 6 件s: Battery Voltage Monitoring, Overvoltage and Undervoltage Protection, Temperature Sensor Threshold Detection, Industrial Sensor Interfacing, Window Comparators, Power-Sequencing and Fault Logic.
Battery Voltage Monitoring
LM393DR2GH fits battery-pack protection because its two independent channels can monitor separate voltage thresholds and provide open-collector fault signals to a controller. The comparator’s input offset voltage can be as low as 2.0 mV, supporting accurate decisions near a divided battery threshold, while the common-mode range reaches ground during single-supply operation. Place each channel’s resistor divider near the input pins, compare the divided battery voltage with a reference, and use the open-collector outputs to signal an overvoltage or undervoltage event. The 36 V total supply rating supports conventional battery systems, although transient protection and the exact monitored range must be checked.
おすすめ
Overvoltage and Undervoltage Protection
LM393DR2GH can implement two rail-protection thresholds in one 8-pin SOIC package. Each channel compares a divided power rail against a reference, then uses its open-collector output to disable a downstream regulator, load switch, or microcontroller input. The input offset voltage specified as low as 2.0 mV improves threshold precision, and the to-ground common-mode range supports single-supply sensing near the lower rail. Add hysteresis to prevent output chatter when the monitored voltage crosses the threshold repeatedly. The pull-up resistor should target the fault-input logic level, while filtering may be required for switching rails with fast transients.
おすすめ
Temperature Sensor Threshold Detection
LM393DR2GH is useful when a thermistor or analog temperature sensor must drive a discrete threshold rather than feed a high-resolution converter. The two channels can detect separate rising and falling temperature limits, providing independent open-collector alerts. The low-offset capability helps distinguish small changes around the switching point, while the common-mode input range to ground supports divider networks referenced to the lower supply rail. Place the sensor and feedback divider close to the comparator inputs, keep the input path away from switching power nodes, and add appropriate filtering if the sensor produces slow noise. Choose pull-ups for the required logic family and include hysteresis to prevent relay or fan chatter.
おすすめ
Industrial Sensor Interfacing
LM393DR2GH provides a straightforward interface between slow-changing industrial sensor outputs and digital control logic. Its independent dual channels can evaluate two sensor levels or compare a sensor signal with an adjustable setpoint, while the 36 V total supply rating offers margin in industrial control systems. The open-collector output is useful for driving an optocoupler, relay-driver input, PLC input, or status indicator when paired with a suitable pull-up. Maintain the common-mode range of each input, use a reference with low drift where accuracy matters, and place protection networks close to the connector to limit surge energy reaching the comparator.
おすすめ
Window Comparators
LM393DR2GH is suited to window detection because its two independent channels can establish upper and lower limits for the same monitored signal. One output can indicate that the input is above the upper threshold, while the other identifies a below-threshold condition. This arrangement avoids the need for two separate packages and gives the controller two open-collector status bits. Set the thresholds with precision resistors and a stable reference, account for the comparator’s input offset voltage, and define whether the outputs are active-low or active-high at the system level. Suitable hysteresis prevents a signal hovering near either limit from repeatedly changing state.
おすすめ
Power-Sequencing and Fault Logic
LM393DR2GH can supervise multiple power rails and generate wired-OR fault indications when a monitored voltage departs from its permitted range. Because the outputs are open collector, multiple channels can share a pull-up to create a single active-low fault bus. The 36 V maximum total supply rating supports use around higher-voltage rails, while the low-offset specification improves decisions near a threshold. Keep each input divider independently scaled to remain within the common-mode limits, specify pull-ups for the logic load, and account for output rise time when several signals are combined. A fault bus should be debounced or used with system-level timing to prevent unintended shutdowns.
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: LM393DR2GH — 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 | LM393 | LM393B | LM393LV | LMV393 |
|---|---|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | onsemi | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Comparator Configuration | Dual independent comparator | Dual comparator | Dual comparator | Dual comparator | Dual comparator |
| Output Type | Open collector | Open collector | Open collector | Open collector | Open collector |
主な差別化要因
- Higher total supply rating than the low-power LMV393 option （vs LMV393)
- Two independent channels in a compact 8-pin SOIC （vs LM393LV)
- Established standard LM393 architecture rather than lower-power architecture （vs LMV393)
- Input offset voltage specified as low as 2.0 mV （vs LM393B)
設計ノート
Treat both open-collector outputs as current-sinking devices and place a pull-up resistor on every output. Select the pull-up voltage for compatibility with the driven logic and calculate its maximum sink current at the lowest output voltage. Lower resistance improves output rise time but increases static supply current from the pull-up rail; higher resistance reduces consumption but slows the edge and increases susceptibility to capacitive noise.
Place the input resistor dividers, reference components, and optional hysteresis resistors close to pins 2, 3, 5, and 6. Keep these high-impedance paths away from switching nodes and the open-collector pull-up routing. A solid ground plane and a short connection from pin 4 reduce return-path disturbance, while placing any input filtering capacitors directly between the input pin and ground limits their switching-node pickup.
Do not treat the open-collector output as a push-pull logic output, and do not omit the external pull-up. Verify that each input remains inside the comparator’s common-mode range, that the total supply does not exceed 36 V, and that differential input conditions comply with the manufacturer limits. Add hysteresis when the compared signal can cross a threshold slowly, otherwise output chatter may repeatedly trigger the controlled load.
The output rising edge is produced by the pull-up resistor rather than an active transistor, so its speed changes with resistor value, load capacitance, and trace length. For long cables or slow logic systems, use a suitably low pull-up while checking sink-current capability. For fast or noisy systems, keep output routing short, provide a nearby logic-side load, and consider filtering the analog input instead of relying on the open-collector edge speed.
コンプライアンス情報
The onsemi LM393 family is identified for consumer and automotive applications, but specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements are not present in the cited manufacturer page.