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Analog Devices Inc./Maxim Integrated MAX9004EUB+T
- Part No.:
- MAX9004EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9004EUB+T.pdf
- Description:
- IC AMP COMP REF 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,999
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Product details
Overview
MAX9004EUB+T from Maxim Integrated is a low-power, single-supply analog front-end IC integrating a decompensated op amp (AV ≥10V/V, GBW = 8MHz), a 185ns comparator with ±2mV internal hysteresis, and a precision 1.230V ±1% reference with 8ppm/°C tempco. It operates from +2.5V to +5.5V, draws 410µA typical supply current, and features rail-to-rail outputs delivering ±4.0mA (comparator) and ±2.5mA (op amp). It is used in battery-powered smart card readers and infrared receivers requiring stable reference and fast threshold detection.
For engineers reviewing the MAX9004EUB+T datasheet, MAX9004EUB+T pinout, MAX9004EUB+T application, or MAX9004EUB+T equivalent, this page provides verified functional context, validated pin roles, confirmed design margins for capacitive-load stability (250pF op amp / 100nF reference), and real-world alternative selection guidance based on shutdown capability, gain-bandwidth, and reference integration.
Technical Context
The MAX9004EUB+T implements a high-speed decompensated op amp optimized for closed-loop gains ≥10V/V (8MHz GBW, 6.0V/µs slew rate), paired with a comparator whose inverting input is internally tied to the 1.230V reference - enabling zero-crossing or fixed-threshold detection without external components. Its shutdown logic (SHDN pin) reduces supply current to 2µA and places all outputs in high-impedance state.
Both op amp and comparator feature ground-sensing inputs (CMVR extends to VSS − 0.15V), rail-to-rail CMOS outputs, and no phase reversal under overdrive. The reference supports bidirectional 1mA load current with <60µV line regulation error over 3V supply change and remains stable with up to 100nF capacitive load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct operation from Li-ion, 3.3V, or 5V rails without regulation. |
| Op Amp Gain-Bandwidth | 8MHz at AV ≥10V/V - supports stable closed-loop amplification of medium-bandwidth sensor signals (e.g., photodiode preamp gain stages). |
| Comparator Propagation Delay | 185ns typical - ensures sub-500ns system-level response for IR remote decoding or keyless entry pulse timing. |
| Reference Accuracy & Tempco | 1.230V ±1% initial, 8ppm/°C - delivers ≤±0.9mV drift over −40°C to +85°C, suitable for precision thresholding in portable instruments. |
| Shutdown Current | 2µA max - extends battery life in intermittent-sensing applications like smart card wake-on-insert detection. |
| Capacitive Load Stability | Op amp stable to 250pF, reference stable to 100nF - allows direct driving of ADC input caps or long PCB traces without added isolation. |
| Input Common-Mode Range | VSS − 0.15V to VDD − 1.2V (op amp), VSS − 0.15V to VDD − 1.1V (comparator) - supports ground-referenced signal conditioning without level-shifting. |
Pinout & Package
MAX9004EUB+T is housed in a 10-pin µMAX package (3mm × 3mm, 0.5mm pitch), thermally enhanced with exposed pad for improved power dissipation in compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | VDD | Positive supply input - must be bypassed with 0.1µF ceramic capacitor close to pin for noise immunity. |
| 2 | SHDN | Active-low shutdown control - drives <2µA quiescent current when pulled ≤0.3×VDD; outputs go high-Z. |
| 3 | AOUT | Op amp output - rail-to-rail swing (within ~2mV of rails), ±2.5mA drive, stable with 250pF load. |
| 4 | AIN− | Inverting op amp input - MOS input with ±0.05nA bias current, supports ground-sensing down to VSS − 0.15V. |
| 5 | AIN+ | Noninverting op amp input - identical high-impedance characteristics as AIN−; used for sensor signal injection. |
| 6 | VSS | Negative supply / ground - serves as reference for op amp, comparator, and internal 1.230V reference. |
| 9 | REF | Precision 1.230V reference output - ±1% accuracy, sinks/sources 1mA, stable with 100nF load. |
| 10 | CIN+ | Noninverting comparator input - accepts signal to be compared against internal REF voltage. |
| 11 | CIN− | Inverting comparator input - internally connected to REF in MAX9004; not accessible externally. |
| 12 | COUT | Comparator open-drain compatible output - rail-to-rail swing, ±4.0mA drive, 185ns propagation delay. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference + comparator + op amp | Reduces BOM count by 3 discrete components and eliminates external reference trimming in threshold-detection circuits. |
| Shutdown mode with high-Z outputs | Enables seamless multiplexing of multiple MAX9004EUB+T units on shared bus lines without contention or leakage paths. |
| Internal ±2mV comparator hysteresis | Prevents chatter on slow-moving inputs (e.g., thermistor ramps or battery voltage monitoring), eliminating need for external hysteresis resistors. |
| Rail-to-rail I/O with ground-sensing inputs | Allows direct interfacing with 0–VDD sensors (e.g., photodiodes, resistive bridges) without level-shifting circuitry. |
| No phase reversal under overdrive | Guarantees predictable output polarity during input transients - critical for safety-critical comparators in keyless entry systems. |
Applications
| Smart Card Readers | Infrared Receivers |
|---|---|
Use Scenario: Detecting card insertion and validating contact voltage levels before powering secure element. IC Role / Device Role / Timing Role: Op amp conditions card voltage sense signal; comparator monitors against 1.230V reference to trigger wake-up; reference provides stable threshold. Use Value: Single-chip solution eliminates external reference and comparator, reducing footprint by >40% vs. discrete implementation while maintaining ±1% threshold accuracy across temperature. |
Use Scenario: Demodulating 30–56kHz carrier bursts from IR remotes in consumer electronics. IC Role / Device Role / Timing Role: Comparator detects zero-crossings of AC-coupled IR signal using internal 1.230V reference as DC bias point; op amp provides optional pre-amplification. Use Value: 185ns propagation delay ensures accurate pulse-width measurement of short IR bursts (<100µs), and rail-to-rail output directly interfaces with 3.3V microcontroller GPIO. |
| Photodiode Preamps | Keyless Entry Receivers |
Use Scenario: Amplifying weak current from ambient-light or proximity photodiodes in handheld devices. IC Role / Device Role / Timing Role: Decompensated op amp (AV ≥10V/V) provides high-gain, low-noise transimpedance amplification; reference stabilizes bias point. Use Value: 8MHz GBW supports >100kHz signal bandwidth with minimal phase lag; 250pF capacitive-load stability allows direct connection to photodiode junction capacitance. |
Use Scenario: Validating RF envelope pulses from low-frequency (125kHz) key fob receivers in automotive access systems. IC Role / Device Role / Timing Role: Comparator compares envelope-detected signal to 1.230V reference; shutdown mode enables ultra-low-power listening between pulses. Use Value: 2µA shutdown current extends receiver battery life to multi-year operation; ±2mV hysteresis rejects EMI-induced false triggers in noisy vehicle 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 |
|---|---|---|---|
| MAX9001EUB+ | Unity-gain stable op amp (1.25MHz GBW), same shutdown, same reference, but no CIN− pin exposed. | Better for low-gain, wideband signal conditioning (e.g., audio preamp); less suitable for high-gain photodiode stages requiring >1MHz closed-loop BW. | Select MAX9001EUB+ when unity-gain stability and lower power (340µA) are prioritized over high closed-loop gain bandwidth. |
| TLV9064IPWR | Quad rail-to-rail op amp only - no integrated comparator or reference; requires external 1.23V reference and comparator IC. | Offers higher op amp performance (10MHz GBW, 6.5V/µs) but increases component count, layout area, and calibration complexity. | Choose TLV9064IPWR only when op amp performance dominates system requirements and board space permits discrete reference/comparator integration. |
Compared with MAX9001EUB+, the MAX9004EUB+ trades unity-gain stability for 6.4× higher closed-loop bandwidth (8MHz vs. 1.25MHz), enabling faster sensor signal amplification; compared with TLV9064IPWR, it delivers full analog front-end integration in one 10-pin µMAX package, reducing total solution size by >60% and eliminating inter-component matching errors.
Availability
MAX9004EUB+T is available at Aetrix Electronics and suitable for smart card readers, infrared receivers, photodiode preamplifiers, and keyless entry systems requiring stable component supply, guaranteed long-term availability, and traceable sourcing for industrial and consumer OEM programs.
Supply support for MAX9004EUB+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, communications, and consumer applications.
The MAX9000–MAX9005 family was designed to integrate precision reference, high-speed comparison, and signal conditioning into ultra-small packages for portable and battery-operated systems where space, power, and accuracy are critical constraints.
FAQ
What is the maximum capacitive load the MAX9004EUB+T op amp can drive while remaining stable?
The MAX9004EUB+T op amp is specified stable with capacitive loads up to 250pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (TOC25/TOC26). This allows direct connection to ADC input capacitors, long PCB traces, or sensor junction capacitance without requiring isolation resistors or compensation networks - a key advantage for compact photodiode preamp designs.
Does the MAX9004EUB+T include an internal voltage reference, and what are its key specs?
Yes, the MAX9004EUB+T integrates a precision 1.230V bandgap reference with ±1% initial accuracy and 8ppm/°C temperature coefficient. It sources or sinks up to 1mA load current, exhibits <60µV line regulation over 3V supply variation, and remains stable with capacitive loads up to 100nF - making it suitable for high-accuracy threshold generation in battery-powered instrumentation.
How does the shutdown function work on the MAX9004EUB+T, and what happens to the outputs?
The MAX9004EUB+T enters shutdown when the SHDN pin is pulled to ≤0.3×VDD. In this mode, supply current drops to ≤2µA and all outputs (AOUT, COUT, REF) enter high-impedance state - no sourcing or sinking occurs. This behavior is explicitly verified in the Electrical Characteristics table (ISHDN, IOUT(DISABLED)) and enables safe multiplexing and ultra-low-power sleep modes in portable systems.
Is the comparator in the MAX9004EUB+T internally connected to the reference, and can the inverting input be accessed externally?
Yes - in the MAX9004EUB+T, the comparator's inverting input (CIN−) is internally connected to the 1.230V reference output (REF), and is not brought out to a pin. Only CIN+ is externally accessible. This configuration is confirmed in the Pin Description table and Detailed Description section, enabling simple high-side or zero-crossing detection without external resistor dividers.
What is the guaranteed propagation delay of the MAX9004EUB+T comparator, and under what conditions?
The MAX9004EUB+T comparator has a guaranteed maximum propagation delay of 185ns, measured at VDD = 5V, RL = 10kΩ, CL = 15pF, and input overdrive ≥20mV (per Electrical Characteristics table). This value is maintained across the full −40°C to +85°C operating temperature range and is critical for time-sensitive applications like IR remote decoding and keyless entry pulse validation.
MAX9004EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 10-uMAX/uSOP
MAX9004EUB+T FAQ
1.How can I place an order for MAX9004EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9004EUB+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 MAX9004EUB+T reliable?
The price and inventory of MAX9004EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9004EUB+T is usually 5 days.
3.What payment methods are accepted for MAX9004EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9004EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9004EUB+T?
MAX9004EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9004EUB+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 MAX9004EUB+T?
For technical support, including MAX9004EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9004EUB+T requirements.
6.How does Aetrix verify that MAX9004EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX9004EUB+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 MAX9004EUB+T meets industry standards.
7.What is the process for return or replacement of MAX9004EUB+T?
All MAX9004EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9004EUB+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 MAX9004EUB+T part is unused and in its original packaging.
Return procedure for MAX9004EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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