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Analog Devices Inc./Maxim Integrated MAX9003EUA
- Part No.:
- MAX9003EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9003EUA.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
MAX9003EUA from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated operational amplifier (AV ≥ 10V/V), an 185ns comparator, and a precision 1.230V ±1% reference. It operates from +2.5V to +5.5V, draws 410µA typical supply current, delivers rail-to-rail outputs (±4.0mA comparator drive), and supports capacitive loads up to 250pF (op amp) and 100nF (reference). It is used in photodiode preamps, zero-crossing detectors, and smart card readers where compact integration and stable reference-based thresholding are critical.
For engineers reviewing the MAX9003EUA datasheet, MAX9003EUA pinout, MAX9003EUA application, or MAX9003EUA equivalent, this page provides verified circuit role, validated pin functions, confirmed operating parameters across temperature and supply voltage, and real-world design implications for single-supply sensor signal conditioning and precision level detection.
Technical Context
The MAX9003EUA's op amp is decompensated for closed-loop gains ≥10V/V with 8MHz gain-bandwidth product and 6.0V/µs slew rate, enabling fast settling (6.9µs to 0.01%) for high-gain signal conditioning. Its comparator features ±2mV internal hysteresis, ground-sensing inputs (VSS −0.15V to VDD −1.1V), and glitch-reduced CMOS output stage that minimizes supply transients during switching.
The integrated 1.230V reference offers ±1% initial accuracy, 8ppm/°C tempco, ±1mA sourcing/sinking capability, and stability with up to 100nF capacitive load - directly connected to the comparator's inverting input per device architecture, eliminating external component count in threshold-comparison circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct interface with Li-ion, 3.3V, and 5V systems without level-shifting. |
| Op Amp Gain-Bandwidth | 8MHz - supports stable closed-loop operation at AV ≥10V/V for precision gain stages in sensor front-ends. |
| Comparator Propagation Delay | 185ns - ensures fast response to input overdrive ≥20mV, suitable for timing-critical zero-crossing detection. |
| Reference Accuracy & Tempco | 1.230V ±1%, 8ppm/°C - provides stable trip-point reference across −40°C to +85°C without calibration. |
| Output Drive Capability | Comparator: ±4.0mA rail-to-rail - drives 10kΩ loads while maintaining VOL ≤400mV and VOH ≥VDD −400mV. |
| Input Common-Mode Range | Op amp: VSS −0.15V to VDD −1.2V; Comparator: VSS −0.15V to VDD −1.1V - supports ground-referenced signal sensing. |
| Quiescent Current | 410µA typical - enables battery-powered operation for >1 year in low-duty-cycle sensor nodes. |
Pinout & Package
MAX9003EUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), thermally enhanced with exposed paddle, rated for −40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AOUT | Op-amp output - rail-to-rail swing, stable with ≤250pF capacitive load; requires no external compensation for AV ≥10V/V. |
| 2 | AIN− | Inverting op-amp input - MOS input with ±0.05nA bias current; accepts signals down to VSS −0.15V. |
| 3 | AIN+ | Noninverting op-amp input - same input range and impedance as AIN−; used for differential or single-ended amplification. |
| 4 | VSS | Negative supply / ground - reference point for op amp, comparator, and internal 1.230V reference. |
| 5 | VDD | Positive supply - powers all three functional blocks; bypassing with 0.1µF capacitor required near pin. |
| 6 | COUT | Comparator output - rail-to-rail CMOS output; sinks/sources up to ±4.0mA; internally pulled to REF in non-inverting config. |
| 7 | CIN+ | Noninverting comparator input - high-impedance bipolar input; accepts signals within VSS −0.15V to VDD −1.1V. |
| 8 | REF | Internal reference output - 1.230V ±1%, 8ppm/°C; connected internally to CIN−; sources/sinks up to 1mA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference + comparator + op amp | Reduces BOM count by 3 discrete components and eliminates matching drift between external reference and comparator thresholds. |
| Rail-to-rail op amp and comparator outputs | Extends dynamic range to full supply rails (e.g., 0–5.5V), maximizing ADC input utilization and reducing headroom loss. |
| ±2mV comparator hysteresis | Prevents chatter on slow-moving or noisy inputs (e.g., thermistor outputs), eliminating need for external RC hysteresis network. |
| Ground-sensing inputs | Enables direct interface with 0V-referenced sensors (photodiodes, RTDs, bridge outputs) without level-shifting circuitry. |
| Stable with 100nF reference load | Allows use of large local decoupling at REF pin to suppress noise in precision threshold applications. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Amplifying weak current from reverse-biased photodiode in optical smoke detector. IC Role / Device Role / Timing Role: Op amp configured as transimpedance amplifier (AV = 10V/V); comparator monitors amplified output against internal 1.230V reference to trigger alarm on threshold breach. Use Value: Single-chip solution eliminates offset drift between external reference and comparator, ensuring consistent detection sensitivity across temperature. |
Use Scenario: Detecting AC line zero crossings in smart energy meter for phase-aligned sampling. IC Role / Device Role / Timing Role: Op amp buffers and amplifies transformer-coupled AC signal; comparator with internal REF sets precise 0V threshold with ±2mV hysteresis to reject noise. Use Value: 185ns propagation delay enables sub-microsecond timing resolution; rail-to-rail COUT directly interfaces with microcontroller GPIO. |
| Smart Card Reader | Infrared Receiver |
|
Use Scenario: Conditioning ISO 7816-3 compliant card interface signals including VCC monitoring and reset pulse generation. IC Role / Device Role / Timing Role: Reference provides stable 1.230V for VCC brown-out detection; comparator triggers reset when supply drops below threshold; op amp conditions card I/O signals. Use Value: Integrated reference tempco (8ppm/°C) ensures reliable brown-out detection across industrial temperature range without recalibration. |
Use Scenario: Demodulating 38kHz IR carrier pulses from remote control in consumer electronics. IC Role / Device Role / Timing Role: Op amp amplifies weak phototransistor output; comparator with internal REF converts analog envelope to clean digital pulse train. Use Value: Low 410µA quiescent current extends battery life in handheld remotes; 8MHz GBW supports clean amplification of burst-modulated signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp + comparator + reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9000EUA | Unity-gain stable op amp (1.25MHz GBW), no shutdown, same REF and comparator specs. | Better suited for unity-gain buffer or low-gain signal conditioning; lacks decompensated speed for high-gain precision stages. | Select MAX9000EUA when gain ≤1V/V is required and lower bandwidth suffices. |
| MAX9004EUB | 10-pin µMAX with shutdown pin (2µA shutdown current), same op amp/comparator/REF specs as MAX9003EUA. | Required where power gating is needed in portable devices; pinout differs - SHDN replaces NC on MAX9003EUA. | Choose MAX9004EUB only if active shutdown control is mandatory and PCB layout accommodates 10-pin footprint. |
Compared with MAX9000EUA, MAX9003EUA trades unity-gain stability for 6.4× higher bandwidth and faster settling - essential for high-gain sensor amplification. Against MAX9004EUB, it sacrifices shutdown functionality for smaller 8-pin µMAX size and lower cost, making it optimal for space-constrained always-on applications.
Availability
MAX9003EUA is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card VCC monitoring requiring stable component supply, long-lifecycle availability, and guaranteed authentic Maxim Integrated silicon.
Supply support for MAX9003EUA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.
The MAX9000–MAX9005 family was engineered to integrate op amp, comparator, and reference into minimal-area packages for space-constrained, single-supply sensor and interface systems - prioritizing low power, rail-to-rail performance, and thermal stability.
FAQ
What is the maximum closed-loop gain supported by the op amp in MAX9003EUA?
The op amp in MAX9003EUA is decompensated and stable for closed-loop gains of +10V/V or greater. It is not unity-gain stable - attempting AV = 1V/V may cause oscillation. Designers must use gain-setting resistors to maintain AV ≥10V/V for stable operation, leveraging its 8MHz gain-bandwidth product for high-speed signal conditioning.
How is the internal reference connected to the comparator in MAX9003EUA?
In MAX9003EUA, the comparator's inverting input (CIN−) is internally hardwired to the REF pin output (1.230V). This eliminates external connections for fixed-threshold comparison. The noninverting input (CIN+) remains accessible externally, allowing standard high-side or low-side threshold detection without additional components.
Does MAX9003EUA include a shutdown feature?
No, MAX9003EUA does not include a shutdown pin or function. Unlike MAX9001EUA or MAX9004EUB, it lacks SHDN control and operates continuously at ~410µA. For battery-sensitive designs requiring ultra-low standby current, MAX9004EUB (2µA shutdown) is the functional alternative - though it uses a 10-pin µMAX package.
What is the capacitive load limit for stable operation of the op amp output in MAX9003EUA?
The op amp output of MAX9003EUA is stable with capacitive loads up to 250pF. Exceeding this value risks peaking or oscillation in closed-loop configurations. For driving larger loads (e.g., cables or ADC inputs), a series resistor (≥100Ω) should isolate the capacitance, or an external buffer stage must be added.
Can MAX9003EUA operate from a dual supply?
Yes, MAX9003EUA supports dual-supply operation from ±1.25V to ±2.75V. In this mode, VSS is connected to the negative rail and VDD to the positive rail. The internal 1.230V reference remains referenced to VSS, and all input/output voltage ranges scale accordingly - but single-supply +2.5V to +5.5V is the primary intended configuration.
MAX9003EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
MAX9003EUA FAQ
1.How can I place an order for MAX9003EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9003EUA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX9003EUA reliable?
The price and inventory of MAX9003EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9003EUA is usually 5 days.
3.What payment methods are accepted for MAX9003EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9003EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9003EUA?
MAX9003EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9003EUA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX9003EUA?
For technical support, including MAX9003EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9003EUA requirements.
6.How does Aetrix verify that MAX9003EUA is sourced from the original manufacturer or authorized distributors?
All MAX9003EUA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX9003EUA meets industry standards.
7.What is the process for return or replacement of MAX9003EUA?
All MAX9003EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9003EUA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX9003EUA part is unused and in its original packaging.
Return procedure for MAX9003EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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