LM2903EPWRQ1 - Automotive Dual Comparator | Texas Instruments
MPN: LM2903EPWRQ1 ✓ نشطLM2903EPWRQ1 نظرة عامة
A comparator is an analog integrated circuit that compares an input voltage with a reference or threshold voltage and switches its output when the differential polarity changes. LM2903EPWRQ1 belongs to the differential comparator family within the broader voltage-comparison, signal-conditioning, and power-management IC hierarchy. Its differential inputs allow one signal to be evaluated against another rather than against a fixed internal reference, making it useful for threshold detection, overvoltage and undervoltage monitoring, sensor conditioning, and control systems.
The dual-channel architecture provides two comparators in one package while keeping each channel independent. The open-collector output structure allows the output transistor to remain off when the output is high-impedance, which supports wired logic, pulled-up buses, and systems requiring an external pull-up resistor. The automotive qualification provides an important distinction from standard industrial comparator variants because the LM2903-Q1 family is characterized for Grade 0 and Grade 1 operating environments.
Typical applications include automotive battery monitoring, 12 V and 24 V power-system supervision, sensor threshold detection, window and system monitoring, industrial control panels, and automotive actuator or interface circuits. The 30 V maximum supply rating provides useful headroom for systems with battery transients and elevated industrial rails. When designing a comparator circuit, verify the input common-mode range, output pull-up requirements, propagation delay, and the electrical limits for the intended automotive operating environment.
The LM2903EPWRQ1 is supplied in an 8-pin TSSOP (PW) package, allowing compact PCB placement while supporting the pin arrangement of the LM2903-Q1 family. For new designs, confirm the selected ordering code against the manufacturer datasheet and validate the external pull-up resistor and input filtering for the specific signal environment.
بدائل مباشرة لـ LM2903EPWRQ1 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع LM2903EPWRQ1 (نفس عامل الشكل والبصمة) — يختلف في Package, Comparator Type, Number of Channels, Output Type, Operating Temperature Range.
LM2903QPWRG4Q1
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2903VQPWRQ1
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←LM2903EPWRQ1 الحدود القصوى والخصائص الكهربائية
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 channels |
| نوع الخرج | Open-collector |
| Supply Voltage Range | 2 V to 30 V |
| Maximum Supply Voltage | 30 V |
| Propagation Delay | 1.3 us maximum |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 |
| نطاق درجة حرارة التشغيل | -40 C to +150 C |
| العلبة | 8-pin TSSOP (PW) |
| نوع التركيب | Surface mount |
| عدد الأطراف | 8 pins |
| Input Configuration | Differential inputs, one inverting and one non-inverting input per channel |
| Input Bias Current | 0.5 nA typical |
تكوين أطراف LM2903EPWRQ1
| دبوس 1 | OUT1 — Comparator 1 open-collector output |
| دبوس 2 | IN1- — Comparator 1 inverting input |
| دبوس 3 | IN1+ — Comparator 1 non-inverting input |
| دبوس 4 | GND — Ground reference |
| دبوس 5 | IN2+ — Comparator 2 non-inverting input |
| دبوس 6 | IN2- — Comparator 2 inverting input |
| دبوس 7 | OUT2 — Comparator 2 open-collector output |
| دبوس 8 | VCC — Positive supply voltage |
التطبيقات النموذجية
LM2903EPWRQ1 مناسب لـ 6 التطبيقs: Automotive Battery Monitoring, 12 V and 24 V Power-Supply Supervision, Automotive Sensor Threshold Detection, Industrial Control and Interface Circuits, Window and System-Level State Detection, High-Voltage Interface and Fault Signaling.
Automotive Battery Monitoring
The LM2903EPWRQ1 fits automotive battery and charging-system supervision because it combines two differential comparator channels with a 2 V to 30 V supply range and AEC-Q100 Grade 0 and Grade 1 qualification. Each channel can compare a divided battery signal with a reference or another divided rail, while the open-collector output provides a simple fault or state indication after an external pull-up. The -40 C to +150 C operating range supports harsh vehicle environments. Add input clamps, filtering, and transient protection around the sensing network, and verify the final threshold and common-mode limits against the vehicle electrical architecture.
موصى به
12 V and 24 V Power-Supply Supervision
The LM2903EPWRQ1 is suitable for monitoring nominal 12 V and 24 V power rails because its supply range reaches 30 V and its differential inputs support threshold comparisons using resistor dividers. One channel can monitor an overvoltage condition and the other an undervoltage condition, with open-collector outputs suitable for pull-up-based fault signaling. The 1.3 us maximum propagation delay is useful for fast system response. Place protective filtering and surge-current handling ahead of the comparator pins, and confirm that the sensing divider keeps both inputs inside the specified common-mode range.
موصى به
Automotive Sensor Threshold Detection
The LM2903EPWRQ1 can implement threshold detection for pressure, temperature, position, and resistive sensors when the sensor output is compared against a reference voltage. Its differential inputs help reject common-mode signal components, while the two independent channels can process complementary limits or two sensing channels. Open-collector outputs can be pulled up and connected to a vehicle control input, diagnostic logic, or an additional protection stage. The AEC-Q100 Grade 0 and Grade 1 qualification supports automotive use, but the sensor amplifier, divider tolerances, and input filtering remain part of the overall signal-chain design.
موصى به
Industrial Control and Interface Circuits
The LM2903EPWRQ1 is useful in industrial control systems that require robust differential threshold decisions and flexible output interfacing. A pair of channels can monitor a control voltage, a feedback node, or a remote sensing line, while open-collector outputs can drive a relay-driver input, optocoupler, PLC input, or status signal. The 30 V maximum supply voltage supports higher-energy industrial rails, and the automotive qualification provides additional environmental confidence. Designers should still add appropriate surge protection, define the external pull-up network, and verify the operating temperature against the enclosure environment.
موصى به
Window and System-Level State Detection
The LM2903EPWRQ1 can support vehicle state-detection logic by comparing two differential signals and producing an open-collector status output. The dual-channel arrangement allows a single package to monitor two related conditions, reducing component count when each condition requires an independent threshold decision. External pull-up resistors convert the open-collector outputs into logic levels, while input dividers establish the comparison points. Because the comparator is qualified for AEC-Q100 Grade 0 and Grade 1, it can be considered for automotive environmental requirements, subject to the complete interface, diagnostic, and transient-protection design.
موصى به
High-Voltage Interface and Fault Signaling
The LM2903EPWRQ1 fits high-voltage interface circuits where a sensed voltage must be compared with a threshold and an open-collector fault signal is preferred. Its 2 V to 30 V operating range provides more margin than a low-voltage logic comparator, while the differential input arrangement supports resistor-based sensing networks. The two channels can provide complementary fault outputs or monitor separate rails, and the 1.3 us maximum propagation delay supports prompt fault responses. Use external clamps, series resistors, and defined pull-ups, and confirm the comparator's input limits before connecting a high-energy source.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ LM2903EPWRQ1 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | LM2903QPWRG4Q1 | LM2903VQPWRQ1 |
|---|---|---|---|
| Comparator Configuration | Dual differential comparator | Dual differential comparator | Dual differential comparator |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin TSSOP (PW) | 8-pin TSSOP (PW) | 8-pin TSSOP (PW) |
| Output Type | Open-collector | Open-collector | Open-collector |
| Supply Voltage Range | 2 V to 30 V | 2 V to 30 V | 2 V to 30 V |
| Maximum Propagation Delay | 1.3 us | 1.3 us | 1.3 us |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 | Automotive AEC-Q100 | Automotive AEC-Q100 |
| Mounting Type | Surface mount | Surface mount | Surface mount |
أبرز الفروقات
- Directly specified automotive qualification (مقابلLM2903QPWRG4Q1)
- Same compact TSSOP footprint for design reuse (مقابلLM2903VQPWRQ1)
- Two independent open-collector channels (مقابلLM2903QPWRG4Q1)
- Broad supply range for vehicle and industrial rails (مقابلLM2903VQPWRQ1)
ملاحظات التصميم
The open-collector outputs do not provide a push-pull logic-high level by themselves. Add a pull-up resistor to the intended supply or interface rail, and select its value so the maximum output-current and power limits remain satisfied. Also confirm that the pull-up voltage does not exceed the output-pin absolute maximum rating.
Place the comparator close to the sensed signal source and keep the input traces short, especially when the threshold divider has a high source impedance. Route the differential pair away from switching nodes and noisy power inductors. Use a ground reference that connects cleanly to the IC ground pin, and place input filtering components close to the relevant input pins.
Before connecting a 12 V or 24 V automotive signal, verify the input common-mode range and add appropriate series resistance, clamping, and filtering. The 30 V supply rating does not by itself guarantee safe operation for every input waveform. Check the absolute maximum input ratings and the complete transient environment in the manufacturer datasheet.
Decouple the supply pin with a local ceramic capacitor and provide additional bulk capacitance according to the source impedance and wiring length. Keep the ground and supply return paths compact so comparator switching currents do not share a noisy path with the sensed signal. Use the application guidance in the manufacturer LM2903-Q1 datasheet when sizing the decoupling network.
معلومات الامتثال
Texas Instruments identifies LM2903EPWRQ1 as AEC-Q100 Grade 0 and Grade 1 qualified. Other compliance fields remain unknown because they are not stated in the available product information.
