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Analog Devices Inc./Maxim Integrated MAX9003EUA-T
- Part No.:
- MAX9003EUA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9003EUA-T.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,754
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Product details
Overview
MAX9003EUA-T from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated op amp (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 (±2.5mA op amp / ±4.0mA comparator), and features ground-sensing inputs with 150mV below VSS common-mode range. It is used in photodiode preamps and zero-crossing detectors where fast response and stable reference are critical.
For engineers reviewing the MAX9003EUA-T datasheet, MAX9003EUA-T pinout, MAX9003EUA-T application, or MAX9003EUA-T equivalent, this page provides verified functional identity, validated 8-pin µMAX package mapping, confirmed pin roles (including internally connected CIN− to REF), exact gain-bandwidth (8MHz), comparator hysteresis (±2mV), and real-world design implications for battery-powered sensor interfaces and precision threshold detection.
Technical Context
The MAX9003EUA-T implements a decompensated op amp optimized for closed-loop gains ≥10V/V, achieving 8MHz gain-bandwidth and 6.0V/µs slew rate - enabling high-speed signal conditioning without stability compromise. Its comparator uses bipolar differential inputs with ±2mV built-in hysteresis and proprietary output stage design that minimizes supply glitches during transitions.
The internal 1.230V bandgap reference offers ±1% initial accuracy, 8ppm/°C tempco, and supports ±1mA load while remaining stable with up to 100nF capacitive load. Critically, the inverting comparator input (CIN−) is hardwired to the REF pin - eliminating external routing and ensuring fixed 1.230V threshold in zero-crossing and level-detection configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct operation from Li-ion, 3.3V, or 5V rails without LDO overhead. |
| Op Amp Gain-Bandwidth | 8MHz - supports stable closed-loop gain ≥10V/V for high-frequency amplification (e.g., IR receiver signal conditioning). |
| Comparator Propagation Delay | 185ns - ensures sub-500ns system-level response for time-critical edge detection in smart card readers. |
| Reference Accuracy & Drift | 1.230V ±1%, 8ppm/°C - guarantees ≤±0.7mV total error over −40°C to +85°C, critical for repeatable threshold setting. |
| Input Common-Mode Range | VSS −0.15V to VDD −1.2V (op amp), VSS −0.15V to VDD −1.1V (comparator) - allows ground-referenced sensor interfacing without level-shifting. |
| Output Drive Capability | Op amp: ±2.5mA; Comparator: ±4.0mA - directly drives 10kΩ loads or logic inputs without external buffers. |
| Quiescent Current | 410µA typical - enables multi-year battery life in keyless entry sensors and portable instrumentation. |
Pinout & Package
MAX9003EUA-T is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad for improved power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AOUT | Op-Amp Output | Rail-to-rail output capable of ±2.5mA drive; connects directly to ADC input or filter network. |
| 2 - AIN− | Inverting Op-Amp Input | High-impedance MOS input; used for feedback or differential sensing in transimpedance configurations. |
| 3 - AIN+ | Noninverting Op-Amp Input | High-impedance MOS input; accepts photodiode or sensor signals referenced to ground or VSS. |
| 4 - VSS | Negative Supply / Ground | Reference node for all internal circuits; must be low-impedance ground plane connection. |
| 5 - VDD | Positive Supply | Single +2.5V to +5.5V supply input; requires local 0.1µF ceramic bypass capacitor. |
| 6 - COUT | Comparator Output | Rail-to-rail CMOS output; sinks/sourses ±4.0mA; directly interfaces with microcontroller GPIO or latch. |
| 7 - CIN+ | Noninverting Comparator Input | High-impedance bipolar input; receives conditioned signal (e.g., amplified photodiode output) for threshold comparison. |
| 8 - REF | Internal Reference Output | 1.230V ±1% output; internally connected to CIN−, establishing fixed comparator trip point - no external resistor needed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Reference + Comparator | REF pin internally tied to CIN−, enabling true zero-component zero-crossing detection with 1.230V threshold. |
| Rail-to-Rail Outputs | Op amp and comparator swing within millivolts of VSS and VDD - maximizes dynamic range in single-supply systems. |
| Ground-Sensing Inputs | Inputs operate down to VSS −0.15V - eliminates need for negative supply or level shifters when interfacing with ground-referenced sensors. |
| Low-Power High-Speed Op Amp | 8MHz GBW at ≥10V/V gain with only 410µA supply current - achieves speed/power ratio superior to general-purpose op amps. |
| Built-in Comparator Hysteresis | ±2mV input-referred hysteresis - prevents chatter on slow-moving or noisy inputs without external positive feedback. |
| Capacitive Load Stability | Op amp stable with up to 250pF; reference stable with up to 100nF - simplifies filtering and decoupling without phase compensation. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Amplifying weak current from IR photodiodes in remote control receivers or optical encoders. IC Role / Device Role: Op amp configured as transimpedance amplifier; comparator monitors output against internal 1.230V reference to detect signal crossing. Use Value: Single-chip solution eliminates discrete op amp + comparator + reference layout complexity and matching errors. |
Use Scenario: Detecting AC line zero crossings for TRIAC triggering in smart energy meters or lighting controls. IC Role / Device Role: Op amp conditions AC waveform; comparator compares against internal REF to generate clean digital zero-cross pulse. Use Value: Internal REF-to-CIN− connection ensures consistent 1.230V threshold across temperature and supply voltage variations. |
| Smart Card Reader Interface | Sensor Signal Threshold Detection |
|
Use Scenario: Reading ISO 7816-compliant smart cards requiring precise voltage-level detection during reset and data transfer. IC Role / Device Role: Op amp buffers card I/O signal; comparator validates logic levels using internal reference for reliable protocol timing. Use Value: 185ns propagation delay enables accurate sampling of high-speed card communication edges. |
Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into digital alerts when thresholds are exceeded. IC Role / Device Role: Op amp conditions sensor signal; comparator triggers interrupt on microcontroller when signal crosses 1.230V reference. Use Value: ±2mV hysteresis prevents false triggers from noise or slow-drift sensor outputs in industrial environments. |
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-T | Unity-gain stable op amp (1.25MHz GBW), no shutdown, same REF and comparator architecture. | Preferred for unity-gain buffer or low-frequency amplification where stability at AV = 1 is required. | Select MAX9000EUA-T when circuit requires AV = 1 configuration and lower bandwidth suffices. |
| MAX9004EUB-T | 10-pin µMAX, adds SHDN pin (2µA shutdown current), same 8MHz GBW op amp and REF/comparator functions. | Required for battery-powered devices needing active power gating between measurement cycles. | Choose MAX9004EUB-T when system-level power management mandates shutdown capability and PCB space allows 10-pin footprint. |
Compared with MAX9000EUA-T, MAX9003EUA-T trades unity-gain stability for higher 8MHz bandwidth at AV ≥10V/V - ideal for faster signal chains - while MAX9004EUB-T adds shutdown control at the cost of one extra pin and larger package, making it optimal for ultra-low-power duty-cycled systems.
Availability
MAX9003EUA-T is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card interface designs requiring stable component supply, long-term lifecycle support, and guaranteed authentic Maxim Integrated sourcing.
Supply support for MAX9003EUA-T 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The MAX9000–MAX9005 family was designed to integrate precision amplification, fast comparison, and stable voltage referencing into minimal-footprint packages for space-constrained, battery-sensitive systems like portable medical devices and IoT edge sensors.
FAQ
What is the op amp gain configuration supported by MAX9003EUA-T?
The MAX9003EUA-T op amp is decompensated and stable only for closed-loop gains of +10V/V or greater. It is not unity-gain stable. Attempting AV = 1 will cause instability and oscillation. Designers must use minimum gain ≥10V/V - for example, noninverting configuration with Rf/Rin ≥ 9 - to ensure 8MHz bandwidth and 6.0V/µs slew rate performance. This is confirmed in the Electrical Characteristics table and Typical Operating Characteristics (TOC22/TOC23).
How is the comparator's reference input connected in MAX9003EUA-T?
In MAX9003EUA-T, the comparator's inverting input (CIN−) is internally hardwired to the REF pin. This means the device uses its internal 1.230V reference as the fixed threshold for the comparator - no external resistors or connections are needed. The noninverting input (CIN+) is the only externally accessible comparator input, simplifying zero-crossing and level-detection designs.
Does MAX9003EUA-T include a shutdown feature?
No, MAX9003EUA-T does not include a shutdown feature. Shutdown functionality is exclusive to the MAX9001 and MAX9004 variants (e.g., MAX9004EUB-T), which add a dedicated SHDN pin that reduces supply current to 2µA. MAX9003EUA-T draws 410µA continuously and has no enable/disable control - confirmed in the Selector Guide and General Description sections of the datasheet.
What is the maximum capacitive load the op amp output can drive stably?
The MAX9003EUA-T op amp is specified to remain stable with capacitive loads up to 250pF, as stated in the Electrical Characteristics table under "CLOAD". This allows direct connection to ADC input capacitors, cable capacitance, or small filter networks without requiring isolation resistors or external compensation. Stability is verified in TOC25 (overshoot vs. CLOAD) and TOC23 (gain/phase with CL = 270pF shows marginal stability margin).
Can MAX9003EUA-T operate from a 2.5V supply?
Yes, MAX9003EUA-T is fully specified for operation from +2.5V to +5.5V. All key parameters - including 410µA supply current, 185ns comparator delay, rail-to-rail output swing, and 1.230V reference accuracy - are guaranteed across this full range. The input common-mode range extends to VSS −0.15V, enabling ground-referenced signal acquisition even at 2.5V, making it suitable for coin-cell or single-LiFePO₄ powered devices.
MAX9003EUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
MAX9003EUA-T FAQ
1.How can I place an order for MAX9003EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9003EUA-T 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-T reliable?
The price and inventory of MAX9003EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9003EUA-T is usually 5 days.
3.What payment methods are accepted for MAX9003EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9003EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9003EUA-T?
MAX9003EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9003EUA-T 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-T?
For technical support, including MAX9003EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9003EUA-T requirements.
6.How does Aetrix verify that MAX9003EUA-T is sourced from the original manufacturer or authorized distributors?
All MAX9003EUA-T 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-T meets industry standards.
7.What is the process for return or replacement of MAX9003EUA-T?
All MAX9003EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9003EUA-T, 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-T part is unused and in its original packaging.
Return procedure for MAX9003EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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