LM2903QPWRQ1 - 36V Automotive Dual Comparator | Texas Instruments
料号： LM2903QPWRQ1 ✓ 量产中LM2903QPWRQ1 概述
A comparator is an analog integrated circuit that evaluates two input voltages and produces a logic-level indication of their relationship. The LM2903-Q1 family belongs to the broader differential comparator and analog signal-conditioning hierarchy, where it sits between general-purpose analog front ends and downstream control logic such as system supervisors, motor controllers, and automotive ECUs. Its differential inputs allow small voltage differences to be resolved without converting the signal through an analog-to-digital converter.
Key features include a 36 V maximum supply capability, low supply-current drain independent of supply voltage, 25 nA typical input bias current, and 3 nA typical input offset current. The open-collector outputs can sink current for wired-AND logic or drive external pull-up devices, while the dual differential architecture places two independent comparator channels in one package. Automotive Grade 0 and Grade 1 qualification supports use in demanding environmental conditions.
The device supports single-supply or dual-supply operation and is designed for low-power threshold detection. Its wide supply range makes it suitable for systems that must monitor voltages well above conventional 5 V or 12 V rails, including vehicle battery systems and industrial control boards. The rail-to-rail open-collector output stage also allows the output to approach the negative supply during low-level input conditions.
Typical applications include automotive battery and power-supply monitoring, overvoltage and undervoltage detection, motor and solenoid control, sensor conditioning, and window or lighting logic. It is also appropriate for industrial control systems requiring a comparator that can operate across a wide supply range without drawing supply current that changes significantly with voltage.
When designing around the LM2903QPWRQ1, verify logic-level compatibility between the open-collector output and the connected microcontroller or system logic. Provide a suitable pull-up resistor at each output, keep input and output traces short, and place bypass capacitance close to the supply pins. Consider input common-mode limits carefully when signals exceed the supply rails.
This page consolidates the manufacturer’s automotive qualification details, package information, comparator specifications, cross-reference candidates, and practical circuit guidance. It supports faster component selection by placing electrical limits, package compatibility, replacement considerations, and application guidance in one engineering-oriented reference.
直接替换替代料： LM2903QPWRQ1 ——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： LM2903QPWRQ1 （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Output Type, Package, Number of Channels, ESD Performance.
LM2903QPWRG4Q1
✅ 直接替换联系询价
查看数据手册 →LM2903PWR
✅ 直接替换📋 参考替代料（不在目录中）
LM2903DR
✅ 直接替换联系询价
查看数据手册 →LM2903B-Q1
✅ 直接替换📋 参考替代料（不在目录中）
LM2903QPWRQ1 最大额定值与电气特性
| Comparator Type | Dual differential comparator |
| Number of Channels | 2 channels |
| 输出类型 | Open-collector, rail-to-rail |
| Maximum Supply Voltage | 36 V |
| Supply Configuration | Single or dual supply |
| 电源电流 | 0.4 mA typical per comparator |
| Input Bias Current | 25 nA typical |
| Input Offset Current | 3 nA typical |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 |
| 工作温度范围 | -40°C to 125°C |
| 封装 | TSSOP (PW), 8 pins |
| 安装类型 | Surface mount |
| Supply Current Drain | Independent of supply voltage |
| ESD Performance | 2 kV HBM for the LM2903B-Q1 family |
LM2903QPWRQ1 tssop (pw), 8 pins 引脚配置指南
LM2903QPWRQ1（tssop (pw), 8 pins 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： LM2903QPWRQ1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM2903QPWRQ1 适用于 6 应用s: Automotive Battery Threshold Monitoring, Overvoltage and Undervoltage Protection, Motor and Solenoid Drive Control, Industrial Sensor Signal Conditioning, Window and Lighting Logic Control, Power-Supply Fault Detection.
Automotive Battery Threshold Monitoring
The LM2903QPWRQ1 is appropriate for monitoring automotive battery voltages because its 36 V maximum supply rating provides headroom above common vehicle electrical rails and its AEC-Q100 Grade 0 and Grade 1 qualification supports automotive temperature requirements. Place one differential channel across a divided battery-sense node and the other across a precision threshold. The open-collector outputs can pull down discrete inputs or system-warning lines, with external pull-up resistors establishing valid logic levels.
推荐
Overvoltage and Undervoltage Protection
Both LM2903QPWRQ1 channels can implement independent voltage-window checks when resistor dividers scale a protected rail into the comparator input range. A 36 V supply limit suits many industrial and vehicle sensing rails, while the typical 0.4 mA per-comparator supply consumption keeps continuous monitoring overhead low. Configure separate resistor networks for rising and falling thresholds, and use open-collector outputs with pull-ups to drive a microcontroller fault input or shutdown latch.
推荐
Motor and Solenoid Drive Control
The LM2903QPWRQ1 can compare a position, current-sense, or Hall-sensor signal against a reference and then sink current into a gate driver or power-stage input. Its differential inputs suit low-level sensor signals, and the dual-channel arrangement allows two control functions to share one package. The open-collector stage requires a pull-up to the gate-driver input supply, while the 36 V capability provides margin in systems containing elevated motor-supply transients when appropriately protected.
推荐
Industrial Sensor Signal Conditioning
The LM2903QPWRQ1 can convert a low-amplitude analog sensor signal into a logic decision when the signal is compared against a precision reference. Its typical 25 nA input bias current helps limit loading on high-impedance sensors, and the dual differential architecture supports two independent channels on a single 8-pin TSSOP. Connect the open-collector output to a pull-up and a controller input, and route the sensor return to the comparator ground reference to reduce common-mode conversion errors.
推荐
Window and Lighting Logic Control
The LM2903QPWRQ1 can compare scaled position or illumination signals against set-point thresholds in automotive body-control and industrial lighting systems. Two channels allow separate decisions without doubling the component count, while the 8-pin TSSOP package supports compact control boards. Pull up each open-collector output to the relevant logic rail, and account for input offset and bias currents when selecting high-value sensor-divider resistors that must not disturb the threshold accuracy.
推荐
Power-Supply Fault Detection
The LM2903QPWRQ1 can supervise a power subsystem by comparing divided supply rails against reference levels and generating active-low fault indications. Its 0.4 mA typical supply current per comparator is useful in always-on industrial controllers, and the open-collector outputs can combine multiple fault conditions with wired logic. Use pull-up resistors to the system fault rail and keep sense-divider routing away from switching nodes to avoid false triggering caused by coupling.
推荐
推荐产品汇总
工程参考数据： LM2903QPWRQ1 ——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 | LM2903QPWRG4Q1 | LM2903PWR | LM2903DR | LM2903B-Q1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TSSOP-8 (PW) | TSSOP-8 (PW) | TSSOP-8 (PW) | SOIC-8 | TSSOP-8 (PW) |
| Comparator Configuration | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator |
| Maximum Supply Voltage | 36 V | 36 V | 36 V | 36 V | Higher supply-voltage capability than the original family |
| Supply Current | 0.4 mA typical per comparator | 0.4 mA typical per comparator | 0.4 mA typical per comparator | 0.4 mA typical per comparator | Lower supply current than the original family |
| Input Bias Current | 25 nA typical | 25 nA typical | 25 nA typical | 25 nA typical | Lower input bias current than the original family |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 | AEC-Q100 Grade 0 and Grade 1 | Not specified as automotive Q1 grade | Not specified as automotive Q1 grade | AEC-Q100 Grade 0 and Grade 1 |
| Operating Temperature Range | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | -40°C to 125°C | Extended temperature range |
| Output Type | Open-collector, rail-to-rail | Open-collector, rail-to-rail | Open-collector, rail-to-rail | Open-collector, rail-to-rail | Open-collector output |
关键差异点
- Explicit automotive Grade 0 and Grade 1 qualification （对比 LM2903PWR)
- Next-generation comparator improvements （对比 LM2903PWR)
- Automotive qualification with a compact 8-pin TSSOP footprint （对比 LM2903DR)
设计说明
Place the supply bypass capacitor immediately between the device supply pins and ground, and keep the differential-input traces short and away from switching nodes. Connect the sensor or divider ground return to the comparator reference ground so input-referred noise does not appear as a false threshold crossing. High-impedance divider nodes should be guarded with a nearby ground trace where practical.
Do not treat the open-collector output as a push-pull logic output. Each output requires a pull-up resistor to a valid logic rail, and the resistor must satisfy the downstream input current while providing an acceptable rise time. Also verify that the sensed voltage remains inside the specified input common-mode range; a 36 V supply rating does not mean every input signal may approach 36 V safely.
Route comparator inputs away from power-switching nodes and high-current motor or solenoid wiring. If a sensed node must cross noisy circuitry, keep the crossing short, use a guarded connection, and ground the adjacent reference plane properly. Slow threshold noise is usually dominated by layout coupling and divider impedance rather than the comparator itself, so filtering should be placed where it will not shift the intended threshold.
Automotive and industrial rails can contain transients above the nominal battery voltage. The LM2903QPWRQ1 is rated to 36 V, so add input protection when the applied rail can exceed that limit. Calculate the continuous comparator supply demand from the typical 0.4 mA per channel and the worst-case external pull-up current, then confirm the total remains within the regulator and thermal budget of the host system.
合规信息
Texas Instruments identifies LM2903-Q1 as AEC-Q100 Grade 0 and Grade 1 qualified. RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations were not stated in the retrieved pages.
