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Analog Devices Inc./Maxim Integrated MAX9000EUA+
- Part No.:
- MAX9000EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9000EUA+.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,405
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Product details
Overview
The MAX9000EUA+ from Maxim Integrated is a low-power, single-supply analog IC integrating a unity-gain stable op amp (1.25MHz GBW), an 185ns comparator with ±2mV hysteresis, and a precision 1.230V ±1% reference with 8ppm/°C tempco - all in an 8-pin µMAX package. It operates from +2.5V to +5.5V, draws 410µA typical supply current, and delivers rail-to-rail outputs for both amplifier and comparator, enabling compact sensor signal conditioning and zero-crossing detection in portable instrumentation.
For engineers reviewing the MAX9000EUA+ datasheet, MAX9000EUA+ pinout, MAX9000EUA+ application, or MAX9000EUA+ equivalent, key selection criteria include its integrated reference accuracy, comparator propagation delay under 200ns, op amp stability with 250pF capacitive loads, shutdown capability (in related variants), and ground-sensing input range extending to VSS −150mV.
Technical Context
The MAX9000EUA+ implements a MOS-input op amp with unity-gain stability and 0.85V/µs slew rate, paired with a bipolar-input comparator featuring internal hysteresis and rail-to-rail CMOS output. Its reference is a bandgap-based 1.230V source with ±1% initial tolerance and 8ppm/°C drift, capable of sourcing/sinking up to 1mA while remaining stable with 100nF capacitive loads.
The comparator's inverting input is internally tied to the reference output - a fixed configuration distinguishing MAX9000/MAX9003 from other family members. Input common-mode range spans VSS −150mV to VDD −1.2V (op amp) and VSS −150mV to VDD −1.1V (comparator), supporting true ground-referenced sensing without level-shifting circuitry.
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 logic systems without external regulators. |
| Op Amp Gain-Bandwidth | 1.25MHz - supports stable unity-gain configurations for precision buffering and filtering up to ~100kHz. |
| Comparator Propagation Delay | 185ns - ensures fast edge detection in timing-critical applications like zero-crossing and pulse-width measurement. |
| Reference Accuracy & Drift | 1.230V ±1%, 8ppm/°C - provides stable threshold generation over temperature without calibration. |
| Quiescent Current | 410µA typical - allows continuous operation in battery-powered devices for months on coin-cell power. |
| Capacitive Load Stability | Op amp stable to 250pF, reference stable to 100nF - eliminates need for isolation resistors when driving ADC inputs or long traces. |
| Input Common-Mode Range | VSS −150mV to VDD −1.2V (op amp), VSS −150mV to VDD −1.1V (comparator) - enables direct sensing of signals referenced to ground or negative rails. |
Pinout & Package
MAX9000EUA+ is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), thermally enhanced with exposed pad, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AOUT | Op-Amp Output | Rail-to-rail CMOS output capable of ±2.5mA drive; requires no pull-up for active-high interfacing. |
| 2 - AIN− | Inverting Op-Amp Input | MOS input with ±2nA bias current; supports high-impedance feedback networks and precision differential sensing. |
| 3 - AIN+ | Noninverting Op-Amp Input | Ground-sensing input down to VSS −150mV - enables direct connection to shunt resistors or photodiode cathodes. |
| 4 - VSS | Negative Supply / Ground | Reference node for op amp, comparator, and internal reference; must be low-impedance for noise immunity. |
| 5 - VDD | Positive Supply | Single +2.5V to +5.5V supply pin; bypassing with 0.1µF ceramic capacitor directly at pin is mandatory. |
| 6 - COUT | Comparator Output | Rail-to-rail CMOS output delivering ±4.0mA; low glitch design minimizes supply noise during transitions. |
| 7 - CIN+ | Noninverting Comparator Input | High-impedance bipolar input; accepts signals from sensors, DACs, or filtered op amp outputs. |
| 8 - REF | Internal Reference Output | 1.230V ±1% source/sink node; connects directly to CIN− internally - not user-accessible as independent pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated reference + op amp + comparator | Reduces BOM count by 3 discrete components and saves >25mm² PCB area vs. separate solutions. |
| Rail-to-rail amplifier/comparator outputs | Enables full dynamic range utilization in single-supply systems - e.g., 0–5V ADC input scaling without level shifters. |
| ±2mV comparator hysteresis | Eliminates external hysteresis resistors and prevents chatter on slow-moving or noisy inputs like thermistor outputs. |
| No phase reversal on overdrive | Guarantees predictable output polarity even when inputs exceed common-mode range - critical for fault-tolerant sensing. |
| Stable with 250pF op amp load | Permits direct connection to ADC sample capacitors or long PCB traces without destabilizing compensation. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in optical encoders or smoke detectors. IC Role / Device Role / Timing Role: Op amp configured as transimpedance amplifier; comparator monitors amplified signal against internal 1.230V reference. Use Value: Eliminates external reference and reduces component count while maintaining sub-200ns response to light pulses. | Use Scenario: Detecting AC line zero crossings in smart energy meters or motor controllers. IC Role / Device Role / Timing Role: Comparator compares AC-derived signal to internal 1.230V reference; op amp conditions input prior to comparison. Use Value: Built-in hysteresis prevents false triggering on noisy sine waves; rail-to-rail output interfaces directly with microcontroller GPIO. |
| Smart Card Reader | Infrared Receiver |
Use Scenario: Conditioning analog signals from ISO 7816 card contacts during power-up and data exchange. IC Role / Device Role / Timing Role: Op amp buffers card voltage levels; comparator validates VCC ramp and detects card insertion via voltage threshold. Use Value: Single-supply operation matches card reader architecture; integrated reference ensures repeatable power-on sequencing. | Use Scenario: Demodulating 38kHz IR carrier bursts from remote controls in consumer electronics. IC Role / Device Role / Timing Role: Op amp amplifies filtered IR detector output; comparator converts analog envelope to clean digital pulses. Use Value: 185ns propagation delay preserves pulse timing integrity; low quiescent current extends standby battery life. |
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+ | Includes shutdown pin (SHDN), reduces supply current to 2µA in disabled state; same 1.25MHz GBW op amp and 185ns comparator. | Required where system-level power gating is needed - e.g., battery-powered handheld test equipment with intermittent sampling. | Select MAX9001EUB+ when active-low shutdown control and ultra-low standby current are mandatory; pinout differs (10-pin µMAX). |
| TLV2304IPW | Discrete dual op amp only (no comparator or reference); rail-to-rail I/O, 1.2MHz GBW, 550µA supply current per channel. | Requires external comparator (e.g., TLV3501) and reference (e.g., REF3012) - increases board area and design complexity. | Choose TLV2304IPW only if op amp performance is primary concern and integration is secondary; no functional equivalence to MAX9000EUA+. |
Compared with MAX9001EUB+, MAX9000EUA+ lacks shutdown but offers identical analog performance in a smaller 8-pin footprint; compared with TLV2304IPW, it delivers full signal-chain integration at lower total solution current and reduced layout risk.
Availability
MAX9000EUA+ is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card reader designs requiring stable component supply across industrial temperature ranges.
Supply support for MAX9000EUA+ 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 product line was designed to consolidate precision analog functions - op amp, comparator, and reference - into space-constrained, battery-sensitive systems without sacrificing speed or accuracy.
FAQ
What is the maximum capacitive load the MAX9000EUA+ op amp can drive while remaining stable?
The MAX9000EUA+ op amp is specified stable with capacitive loads up to 250pF without external compensation. This allows direct connection to ADC input capacitors, long PCB traces, or RC filters without risk of oscillation - verified across temperature and supply voltage ranges per the manufacturer's Typical Operating Characteristics (TOC25).
Does the MAX9000EUA+ include a shutdown feature?
No, the MAX9000EUA+ does not include a shutdown pin or function. Shutdown capability is present only in MAX9001/MAX9004 variants (e.g., MAX9001EUB+). The MAX9000EUA+ operates continuously with 410µA typical supply current and cannot be placed into a 2µA low-power state.
Can the internal reference of the MAX9000EUA+ be used independently of the comparator?
Yes - the 1.230V reference output (pin 8, REF) is accessible externally and may be used to bias external circuits (e.g., ADC references, sensor excitation). However, the comparator's inverting input (CIN−) is permanently tied to this reference internally and is not brought out to a pin - unlike MAX9002/MAX9005.
What is the input common-mode voltage range for the op amp in the MAX9000EUA+?
The op amp input common-mode range in the MAX9000EUA+ extends from VSS −150mV to VDD −1.2V. At VDD = 5V, this means usable input voltages from −0.15V to +3.8V - enabling true ground-referenced signal acquisition and compatibility with sensors whose outputs swing below ground.
Is the MAX9000EUA+ pin-compatible with other devices in the MAX9000–MAX9005 family?
No - the MAX9000EUA+ uses an 8-pin µMAX package with a unique pinout optimized for its integrated reference topology. MAX9001EUB+ (10-pin µMAX) and MAX9002EUA+ (8-pin µMAX, no reference) have different pin assignments and terminal functions; PCB layout is not interchangeable between variants.
MAX9000EUA+ 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:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
MAX9000EUA+ FAQ
1.How can I place an order for MAX9000EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9000EUA+ 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 MAX9000EUA+ reliable?
The price and inventory of MAX9000EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9000EUA+ is usually 5 days.
3.What payment methods are accepted for MAX9000EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9000EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9000EUA+?
MAX9000EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9000EUA+ 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 MAX9000EUA+?
For technical support, including MAX9000EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9000EUA+ requirements.
6.How does Aetrix verify that MAX9000EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX9000EUA+ 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 MAX9000EUA+ meets industry standards.
7.What is the process for return or replacement of MAX9000EUA+?
All MAX9000EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9000EUA+, 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 MAX9000EUA+ part is unused and in its original packaging.
Return procedure for MAX9000EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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