LM2903VQPWRQ1 - Dual 36V Automotive Comparator | Texas Instruments
Référence : LM2903VQPWRQ1 ✓ ActifLM2903VQPWRQ1 Présentation
A comparator is an analog integrated circuit that evaluates a voltage at its non-inverting input against a voltage at its inverting input and switches its output according to the polarity of that difference. The LM2903 family belongs to the broader hierarchy of differential comparator, analog comparator, linear integrated circuit, and semiconductor. Its open-collector outputs allow the output stage to be pulled up to a local supply or logic rail, providing flexibility for wired-AND arrangements and direct interfacing with TTL, MOS, or CMOS-compatible circuitry.
The V-enhanced LM2903-Q1 family is designed for cost-sensitive applications requiring wide supply tolerance, low supply-current drain, and automotive qualification. According to the manufacturer product page, the device offers improved low-offset voltage, higher supply-voltage capability, lower supply current, lower input bias current, lower propagation delay, and improved 2 kV ESD performance compared with earlier LM293, LM393, and LM2903 families. The improved 2 kV ESD capability is especially relevant to chassis-connected and cable-driven automotive systems.
Typical uses include battery monitoring, threshold detection, overvoltage and undervoltage protection, window comparators, motor-control interfaces, and signal conditioning. Because each half of the device operates independently, one package can implement two unrelated comparison functions. This reduces component count while preserving separate inputs and outputs for each channel.
For PCB design, keep the two comparator channels away from high-current switching paths and high-impedance input traces where practical. Place input-referenced components close to their associated pins, provide an uninterrupted ground return, and use pull-up resistors on both open-collector outputs. Confirm the pull-up voltage, output-sink current, input common-mode range, and supply limits against the manufacturer datasheet before fixing the external component values.
This page consolidates the device specification, drop-in alternatives, package-level comparison data, and practical PCB guidance into a design-focused reference. It also identifies which automotive and electrical details must be confirmed in the official manufacturer documentation before production release.
Alternatives de remplacement direct pour LM2903VQPWRQ1 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM2903VQPWRQ1 (même facteur de forme et même empreinte) — différant par Package, Comparator Type, Automotive Qualification, Number of Channels, Input Configuration.
LM2903QPWRQ1
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Voir la fiche technique →LM2903VQPWR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM2903VQPWR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM2901AVQPWR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM2902KAVQPWRQ1
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Voir la fiche technique →LM2903VQPWRQ1 Valeurs maximales et caractéristiques électriques
| Comparator Type | Dual general-purpose differential comparator |
| Number of Channels | 2 channels |
| Supply Configuration | Single supply or dual supplies |
| Dual-Supply Total Voltage Range | 2 V to 36 V |
| Minimum VCC Margin | At least 1.5 V above the lower supply |
| Supply Current Drain | 0.4 mA typical per comparator |
| Type de sortie | Open-collector |
| Common-Mode Input Range | Rail-to-rail |
| Automotive Qualification | AEC-Q100 Grade 0 and Grade 1 |
| ESD Rating | 2 kV |
| Boîtier | 8-pin TSSOP |
| Type de montage | Surface mount |
| Shipping Format | Tape and reel |
Configuration des broches de LM2903VQPWRQ1
| Broche 1 | OUT1 — Open-collector output of comparator channel 1 |
| Broche 2 | IN1- — Inverting input of comparator channel 1 |
| Broche 3 | IN1+ — Non-inverting input of comparator channel 1 |
| Broche 4 | GND — Ground connection |
| Broche 5 | IN2+ — Non-inverting input of comparator channel 2 |
| Broche 6 | IN2- — Inverting input of comparator channel 2 |
| Broche 7 | OUT2 — Open-collector output of comparator channel 2 |
| Broche 8 | VCC — Positive supply connection |
Applications typiques
LM2903VQPWRQ1 convient pour 6 applications: Automotive Battery Threshold Monitoring, Overvoltage and Undervoltage Protection, Motor Drive and Control Feedback, Sensor Signal Conditioning, Industrial Limit-Switch Interface, Open-Collector Alarm and Fault Logic.
Automotive Battery Threshold Monitoring
The LM2903VQPWRQ1 suits automotive battery supervision because the LM2903-Q1 family is AEC-Q100 Grade 0 and Grade 1 qualified, supports a 2 V to 36 V dual-rail difference, and draws only 0.4 mA typical per comparator. Place one channel across a divided battery voltage and the other across a second threshold for overvoltage or undervoltage detection. Open-collector outputs can drive a low-current warning or load-management input, with pull-up resistors tied to the vehicle logic rail. Because the inputs can sit near a supply rail, verify the exact common-mode limits and temperature grade before committing the divider values.
Recommandé
Overvoltage and Undervoltage Protection
Each LM2903VQPWRQ1 channel can form an independent window-comparator stage for supply protection. A resistive divider scales the monitored voltage, one channel detects the upper limit, and the other detects the lower limit; their open-collector outputs can be combined or routed to separate control logic. The low 0.4 mA typical drain per comparator reduces standing load in always-on systems, while the 2 V to 36 V dual-supply span supports industrial and automotive rails. Select divider tolerance for the required threshold accuracy and confirm input bias-current effects across the full temperature range.
Recommandé
Motor Drive and Control Feedback
The LM2903VQPWRQ1 can monitor a current-sense or position-feedback signal against a reference in an automotive motor-control subsystem. Two independent channels allow simultaneous comparison of, for example, a low-speed threshold and an overcurrent threshold without allocating two packages. Its open-collector output can pull a fault line low, and the 2 kV ESD improvement highlighted for the LM2903-Q1 family adds margin in chassis-connected equipment. Keep sensitive sense-node routing away from motor-switching nodes, and confirm whether the input common-mode voltage remains within the comparator limits during switching transitions.
Recommandé
Sensor Signal Conditioning
The LM2903VQPWRQ1 is useful for converting a slowly changing sensor signal into a logic-level decision. A resistive network establishes the reference voltage, while the sensor voltage is applied to the opposite input; the open-collector output can then drive a digital input through a pull-up. With two channels in one 8-TSSOP package, a design can combine a sensor limit check with a second independent diagnostic. The low typical drain of 0.4 mA per comparator helps preserve sensor-system power budget, although input offset and bias-current values must be checked against the smallest threshold the application needs to resolve.
Recommandé
Industrial Limit-Switch Interface
The LM2903VQPWRQ1 can interface a mechanical or resistive limit switch to low-voltage digital logic by referencing the switch voltage against a threshold. One channel may detect the upper travel limit and the other the lower travel limit, with each open-collector output pulled up to the controller rail. The wide dual-supply operating span supports systems where the comparator supply and logic supply differ. The TSSOP footprint allows placement close to the connector, reducing susceptibility to pickup on long sensor traces. Add input filtering as required, and avoid exceeding the negative differential input limit during switching transients.
Recommandé
Open-Collector Alarm and Fault Logic
Open-collector outputs allow the LM2903VQPWRQ1 to implement wired-AND fault reporting in which either comparator can pull a shared line low. This arrangement works well in automotive or industrial modules where multiple monitored conditions must reach one controller input. Pull the combined line up to the receiving logic supply, and account for the summed sink current from both channels when sizing the resistor. The 0.4 mA typical drain per comparator supports low-power always-on monitoring, while AEC-Q100 Grade 0 and Grade 1 qualification supports automotive qualification programs when the correct grade and documentation are selected.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM2903VQPWRQ1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM2903QPWRQ1 | LM2903VQPWR | LM2903VQPWR | LM2901AVQPWR | LM2902KAVQPWRQ1 |
|---|---|---|---|---|---|---|
| Package | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP | 8-TSSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | ROHM Semiconductor | Texas Instruments | Texas Instruments |
| Comparator Configuration | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator | Dual differential comparator |
| Number of Channels | 2 | 2 | 2 | 2 | 2 | 2 |
Principaux différenciateurs
- Automotive qualification in the standard LM2903-Q1 ordering family (vs LM2903VQPWR)
- Enhanced family specifications for automotive system robustness (vs LM2901AVQPWR)
- Two independent channels in a compact 8-pin TSSOP package (vs LM2902KAVQPWRQ1)
Notes de conception
Both open-collector outputs require external pull-up resistors. Select the pull-up rail so it remains within the output-pin voltage limits, and size the resistor for the required rise time, leakage current, and the sum of sink current from both channels when their fault outputs are wired together. The typical device supply drain is 0.4 mA per comparator, but output pull-up current is external and can dominate the total system demand.
Route the two input nets as short, guarded traces and connect input-referenced dividers close to the relevant comparator pins. Keep the TSSOP ground connection on a low-impedance plane without cuts beneath the device. Because the part supports 2 V to 36 V between dual supplies, isolate any input node that can exceed the local ground by more than the documented differential-input limit.
Do not treat an open-collector output as actively driven high. Without a pull-up, the output can float and may pick up noise. Also avoid assuming that identical TSSOP pinouts guarantee interchangeable electrical behavior: LM2903QPWRQ1, LM2903VQPWR, LM2901AVQPWR, and LM2902KAVQPWRQ1 can differ in offset voltage, common-mode range, propagation delay, and qualification grade.
The LM2903-Q1 family includes improved 2 kV ESD performance, which is valuable in automotive environments, but it does not eliminate the need for board-level transient protection. Keep connector-side surge paths away from the comparator inputs, use appropriately rated series resistance or clamps where required, and validate the complete module against the applicable automotive transient requirement.
Informations de conformité
Texas Instruments identifies the LM2903-Q1 family as AEC-Q100 Grade 0 and Grade 1 qualified. Other environmental and material compliance statements should be confirmed from the manufacturer's current product documentation.