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Analog Devices Inc./Maxim Integrated MAX9000EUA+T
- Part No.:
- MAX9000EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9000EUA+T.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
MAX9000EUA+T 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 photodiode preamplification and zero-crossing detection.
For engineers reviewing the MAX9000EUA+T datasheet, MAX9000EUA+T pinout, MAX9000EUA+T application, or MAX9000EUA+T equivalent, key selection criteria include its integrated reference accuracy, comparator propagation delay under 200ns, op amp stability with 250pF capacitive loads, and absence of phase reversal during overdrive - critical for sensor signal conditioning in battery-powered instrumentation.
Technical Context
The MAX9000EUA+T implements a monolithic CMOS/MOS hybrid architecture: the op amp uses MOS differential inputs for ultra-low bias current (±0.05nA typ) and a CMOS output stage enabling rail-to-rail swing within 2mV of rails; the comparator employs bipolar inputs for fast response and proprietary cross-conduction suppression to eliminate supply glitches during transitions.
Its internal 1.230V reference is bandgap-based, stable with up to 100nF capacitive load, and directly connected to the comparator's inverting input - eliminating external routing while maintaining ±1% initial accuracy and 60µV line regulation over 3V supply change. No shutdown function is present, distinguishing it from MAX9001/MAX9004 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion, 3.3V, and 5V logic without level-shifting. |
| Quiescent Current | 410µA typ - supports >1-year battery life in always-on sensor nodes at 3.3V. |
| Op Amp GBW | 1.25MHz - sufficient for closed-loop gain ≥1 with bandwidth up to ~1MHz at AV=1. |
| Comparator Propagation Delay | 185ns - ensures sub-500kHz timing resolution in zero-crossing and pulse-width detection. |
| Reference Accuracy & Tempco | ±1% initial, 8ppm/°C - guarantees <±0.1% drift over -40°C to +85°C for precision threshold setting. |
| Input Common-Mode Range | VSS −150mV to VDD −1.2V - allows ground-sensing operation with single-ended inputs down to 0V. |
| Rail-to-Rail Output Swing | Within 2mV of rails at 1mA - maximizes dynamic range in ADC driver and comparator output stages. |
Pinout & Package
MAX9000EUA+T 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/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AOUT | Op-Amp Output | Drives loads up to ±2.5mA; stable with 250pF capacitive load; no phase reversal on overdrive. |
| 2 - AIN− | Inverting Op-Amp Input | MOS input with ±0.05nA bias current; common-mode range extends 150mV below VSS. |
| 3 - AIN+ | Noninverting Op-Amp Input | Matches AIN− characteristics; supports DC-coupled sensor interfaces with ground-referenced signals. |
| 4 - VSS | Negative Supply / Ground | Reference node for op amp, comparator, and internal reference; must be low-impedance. |
| 5 - VDD | Positive Supply | Accepts +2.5V to +5.5V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin. |
| 6 - COUT | Comparator Output | CMOS rail-to-rail output sourcing/sinking ±4.0mA; 185ns propagation delay with 50mV overdrive. |
| 7 - CIN+ | Noninverting Comparator Input | High-impedance bipolar input; common-mode range extends to VDD −1.1V for single-supply sensing. |
| 8 - REF | Internal Reference Output | 1.230V ±1%, 8ppm/°C; sinks/sources up to 1mA; internally connected to CIN− (no external pin). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Reference + Comparator + Op Amp | Reduces BOM count by 3 discrete components and eliminates inter-component layout mismatch in thresholding circuits. |
| Comparator with ±2mV Hysteresis | Prevents chatter on slow-moving or noisy inputs (e.g., thermistor outputs), eliminating need for external hysteresis resistors. |
| No Phase Reversal on Overdrive | Ensures predictable op amp behavior when inputs exceed common-mode range - critical in fault-detection amplifiers. |
| Stable with 250pF Capacitive Load (Op Amp) | Allows direct driving of ADC input capacitors or long PCB traces without external isolation resistor. |
| Low 410µA Quiescent Current | Enables continuous operation in energy-harvesting systems where average current budget is <500µA. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in optical smoke detectors or ambient light sensors. IC Role / Device Role / Timing Role: Op amp configured as transimpedance amplifier; reference sets bias point; comparator detects signal threshold crossing. Use Value: Integrated 1.230V reference eliminates external voltage divider error; rail-to-rail output maximizes ADC utilization across 3.3V supply. | Use Scenario: Converting AC line voltage into clean digital square wave for phase-angle control in dimmers or motor drives. IC Role / Device Role / Timing Role: Op amp buffers and conditions sine wave; comparator with internal hysteresis rejects noise near zero-crossing point. Use Value: 185ns propagation delay ensures <1° timing error at 50Hz; ±2mV hysteresis prevents multiple toggles on slow zero crossings. |
| Smart Card Reader Interface | Infrared Receiver Front-End |
Use Scenario: Conditioning analog signals from ISO 7816 smart card contacts during power-up and data exchange. IC Role / Device Role / Timing Role: Op amp provides gain and filtering; reference establishes precise voltage thresholds for card presence detection. Use Value: 8ppm/°C reference tempco maintains card detection accuracy across industrial temperature range (-40°C to +85°C). | Use Scenario: Demodulating 38kHz IR carrier bursts from remote controls in consumer electronics. IC Role / Device Role / Timing Role: Op amp amplifies weak phototransistor output; comparator with fast 185ns response recovers digital data stream. Use Value: 1.25MHz GBW supports >100kHz small-signal bandwidth; rail-to-rail output ensures full logic swing into microcontroller input. |
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 |
|---|---|---|---|
| MAX9003EUA+T | 8MHz GBW op amp (AV ≥10V/V only); same reference and comparator; no shutdown. | Better suited for higher-gain, higher-bandwidth signal chains (e.g., active filters), but not unity-gain stable. | Select MAX9003EUA+T only if closed-loop gain ≥10V/V is required and unity-gain stability is unnecessary. |
| TLV2304IDR | Separate dual op amp (no comparator or reference); rail-to-rail I/O; 120µA per channel; 200kHz GBW. | Requires external comparator (e.g., TLV3501) and reference (e.g., REF3012) - increases board area and calibration complexity. | Choose TLV2304IDR only when lower quiescent current (<250µA total) outweighs integration benefits and timing-critical comparator performance is not needed. |
Compared with MAX9003EUA+T, the MAX9000EUA+T offers unity-gain stability and lower bandwidth - ideal for general-purpose buffering and thresholding; compared with TLV2304IDR, it trades off some quiescent current for full signal-chain integration, reducing design cycle time and component count in space-constrained portable instruments.
Availability
MAX9000EUA+T is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card reader interface applications requiring stable component supply and guaranteed long-term availability.
Supply support for MAX9000EUA+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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.
The MAX9000–MAX9005 family was engineered to consolidate op amp, comparator, and reference functions into minimal-footprint packages for battery-powered instrumentation and sensor interface modules.
FAQ
What is the maximum capacitive load the op amp output of MAX9000EUA+T can drive while remaining stable?
The op amp in MAX9000EUA+T is stable with capacitive loads up to 250pF, as confirmed in the Electrical Characteristics table and Typical Operating Characteristics (TOC25). This allows direct connection to ADC input capacitors or moderate-length PCB traces without requiring isolation resistors or compensation networks - a key advantage for compact sensor front-end designs.
Does MAX9000EUA+T include a shutdown feature?
No, MAX9000EUA+T does not include a shutdown feature. Unlike MAX9001EUA+T or MAX9004 variants, it lacks a SHDN pin and operates continuously. Its typical supply current is 410µA, making it suitable for always-on applications where shutdown functionality is not required.
How is the comparator's inverting input connected in MAX9000EUA+T?
In MAX9000EUA+T, the comparator's inverting input (CIN−) is internally connected to the internal 1.230V reference output (REF pin), as explicitly stated in the General Description and Pin Description sections. This eliminates the need for external routing and reduces sensitivity to PCB noise - simplifying zero-crossing and threshold-detection circuitry.
What is the input common-mode voltage range for the op amp in MAX9000EUA+T?
The op amp input common-mode voltage range in MAX9000EUA+T extends from VSS −150mV to VDD −1.2V, enabling true ground-sensing operation with single-supply configurations. This specification is guaranteed across the full −40°C to +85°C temperature range and supports interfacing with 0V-referenced sensors such as thermistors and bridge elements.
Can MAX9000EUA+T operate from a 2.5V supply while maintaining rail-to-rail output swing?
Yes, MAX9000EUA+T operates down to +2.5V supply and maintains rail-to-rail output swing - delivering VOH within 2mV of VDD and VOL within 2mV of VSS at 1mA load, as verified in the Electrical Characteristics tables (VOL/VOH rows). This ensures full dynamic range utilization in low-voltage 2.5V systems such as portable medical sensors.
MAX9000EUA+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:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
MAX9000EUA+T FAQ
1.How can I place an order for MAX9000EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9000EUA+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 MAX9000EUA+T reliable?
The price and inventory of MAX9000EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9000EUA+T is usually 5 days.
3.What payment methods are accepted for MAX9000EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9000EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9000EUA+T?
MAX9000EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9000EUA+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 MAX9000EUA+T?
For technical support, including MAX9000EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9000EUA+T requirements.
6.How does Aetrix verify that MAX9000EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX9000EUA+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 MAX9000EUA+T meets industry standards.
7.What is the process for return or replacement of MAX9000EUA+T?
All MAX9000EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9000EUA+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 MAX9000EUA+T part is unused and in its original packaging.
Return procedure for MAX9000EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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