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Analog Devices Inc./Maxim Integrated MAX952EUA+T
- Part No.:
- MAX952EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX952EUA+T.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,564
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Product details
Overview
MAX952EUA+T from Maxim Integrated is an ultra-low-power, single-supply analog IC integrating a decompensated op amp (125kHz GBW, 66V/ms slew rate), rail-to-rail comparator with internal 1.2V ±2% bandgap reference, and reference output - all in an 8-pin µMAX package. It operates from 2.7V to 7V, draws just 7μA typical supply current, and supports battery-powered instrumentation requiring precision threshold detection and low-noise amplification.
For engineers reviewing the MAX952EUA+T datasheet, MAX952EUA+T pinout, MAX952EUA+T application, or MAX952EUA+T equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX952EUA+T implements a dual-path analog signal chain: its decompensated op amp is stable only at gains ≥10V/V and optimized for low-noise preamplification of weak signals (e.g., photodiode or ionization chamber outputs), while its comparator features ±3mV internal hysteresis, rail-to-rail CMOS output capable of 40mA continuous sourcing, and input common-mode range extending from VSS to VDD–1.6V.
This architecture enables simultaneous sensor buffering and clean digital decision-making without external reference or bias components. The integrated 1.2V reference feeds the comparator's inverting input and is specified for ±2% accuracy over –40°C to +85°C, with load regulation ≤1.5% at ±6μA - supporting direct use in precision thresholding circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 7V - compatible with single-cell Li-ion (3.0–4.2V) and dual-alkaline (3.0–3.6V) systems without LDO. |
| Supply Current (Typ) | 7μA - enables >10-year battery life in always-on smoke detectors using CR2032 coin cell. |
| Op Amp Gain Bandwidth | 125kHz - sufficient for 10kHz RF alarm front ends and IR remote preamps up to 20kbps. |
| Comparator Propagation Delay | 4µs (VOD = 100mV, CL = 100pF) - ensures fast response to transient smoke or intrusion events. |
| Reference Accuracy | ±2% (–40°C to +85°C) - eliminates need for external trimming in industrial sensor thresholds. |
| Input Common-Mode Range | VSS to VDD–1.6V - allows direct interfacing to ground-referenced sensors without level-shifting. |
| Rail-to-Rail Outputs | AMPOUT and COMPOUT swing within 50mV of VSS/VDD - simplifies interface to 3.3V/5V logic and ADCs. |
Pinout & Package
MAX952EUA+T is housed in an 8-pin µMAX package (2.1mm × 2.1mm, 0.5mm pitch), RoHS-compliant, with exposed pad for thermal enhancement. Pin numbering follows standard µMAX top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AMPOUT | Op Amp Output | Drives capacitive loads up to 1000pF; rail-to-rail swing enables direct connection to ADC inputs or comparator reference dividers. |
| 2 - AMPIN− | Inverting Op Amp Input | High-impedance CMOS node (IB < 0.05nA); requires guard ring routing in high-Z smoke sensor applications. |
| 3 - AMPIN+ | Noninverting Op Amp Input | Accepts DC-coupled sensor signals down to VSS; used with REF for fixed-gain configurations in IR receivers. |
| 4 - VSS | Negative Supply / Ground | Reference point for all analog circuitry; must be low-impedance return path to avoid crosstalk into REF and AMPIN+. |
| 5 - COMPIN+ | Noninverting Comparator Input | Receives conditioned signal from AMPOUT; hysteresis ensures noise immunity even with slow-moving inputs (e.g., temperature drift). |
| 6 - REF / COMPIN− | 1.2V Reference Output & Comparator Inverting Input | Internally connected node; supplies precise threshold to comparator; not bypassable - max 100pF capacitive load. |
| 7 - COMPOUT | Comparator Output | CMOS rail-to-rail output sourcing up to 40mA continuously - drives LEDs, MOSFET gates, or microcontroller interrupts directly. |
| 8 - VDD | Positive Supply | Accepts 2.7–7V; bypassing with 0.1µF ceramic to VSS is recommended to suppress supply coupling from COMPOUT switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.2V ±2% bandgap reference | Eliminates external voltage reference IC and calibration in battery-operated safety sensors. |
| 125kHz op amp with 66V/ms slew rate | Supports stable gain-of-10 amplification of 10kHz carrier signals in IR remote front ends without oscillation. |
| ±3mV internal comparator hysteresis | Prevents chatter on slowly ramping smoke chamber voltages without requiring external feedback resistors. |
| Rail-to-rail input/output stages | Enables full dynamic range utilization from single 3V supply - critical for low-voltage portable instruments. |
| 7μA total quiescent current | Permits continuous monitoring in smart cards and bar-code readers with multi-year button-cell lifetime. |
Applications
| Photodiode Preamp | Smoke Detector Sensor Interface |
|---|---|
|
Use Scenario: Amplifying weak current from IR photodiode in TV remote receiver under ambient light. IC Role / Device Role / Timing Role: MAX952EUA+T op amp acts as transimpedance amplifier; comparator digitizes output with hysteresis against internal REF. Use Value: Integrated REF and rail-to-rail operation enable single-supply 5V design with no external bias network - reducing BOM count by 4 components. |
Use Scenario: Buffering high-impedance voltage from ionization chamber in residential smoke alarm. IC Role / Device Role / Timing Role: MAX952EUA+T op amp buffers chamber voltage; comparator triggers alarm when chamber voltage exceeds REF-based threshold. Use Value: Input bias < 0.05nA and 7μA supply current allow direct connection to >50MΩ chamber node with decade-long battery life. |
| Infrared Receiver Front End | Low-Frequency Alarm Detector |
|
Use Scenario: Signal conditioning and demodulation of 38kHz IR carrier in data link receivers. IC Role / Device Role / Timing Role: MAX952EUA+T op amp configured as Delyiannis-Friend bandpass filter; comparator provides clean pulse output. Use Value: 125kHz GBW and 66V/ms slew rate support stable 10kHz envelope detection - enabling reliable 20kbps data links. |
Use Scenario: Detecting proximity-triggered RF field collapse in perimeter security sensors. IC Role / Device Role / Timing Role: MAX952EUA+T op amp amplifies antenna signal; comparator generates interrupt on threshold crossing with <4µs delay. Use Value: 4µs propagation delay at 100mV overdrive ensures sub-10ms alarm response - meeting UL 217 Class A timing requirements. |
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 |
|---|---|---|---|
| MAX952ESA+ | Same core functionality; SO-8 package (4.9mm × 6.0mm) vs. µMAX (2.1mm × 2.1mm). | Preferred for prototyping and manual assembly; less suitable for space-constrained wearables or smoke detector PCBs. | Select MAX952ESA+ when board area is not constrained and hand-soldering is required. |
| TLV7032IDR | Separate dual comparator (no op amp or reference); 1.8V–5.5V supply; 650nA per comparator. | Requires external op amp (e.g., TLV2462) and reference (e.g., REF3012) - increases BOM, layout complexity, and power. | Choose TLV7032IDR only if system already uses TI ecosystem and needs ultra-low comparator-only current. |
Compared with MAX952ESA+, the MAX952EUA+T saves >70% board area and enables miniaturized safety sensors; compared with TLV7032IDR + external analog blocks, it reduces component count by 3, eliminates inter-stage matching errors, and cuts total quiescent current by 50%.
Availability
MAX952EUA+T is available at Aetrix Electronics and suitable for battery-powered instruments, smoke detectors, and infrared receivers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX952EUA+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 automotive applications.
The MAX951–MAX954 family was engineered to replace discrete op amp + comparator + reference solutions in ultra-low-power, single-supply portable safety and sensing systems - prioritizing micropower operation, integrated precision, and robust noise immunity.
FAQ
What is the operating temperature range for MAX952EUA+T?
The MAX952EUA+T is rated for –40°C to +85°C (industrial grade), as confirmed by Maxim's official datasheet revision 3 (2/2015). This range covers deployment in consumer smoke alarms, outdoor IR receivers, and handheld bar-code scanners without derating. The µMAX package's thermal characteristics support sustained operation at +85°C ambient when mounted with standard PCB copper pour.
Can MAX952EUA+T drive a 1000pF capacitive load with the op amp?
Yes - the MAX952EUA+T op amp is explicitly characterized to drive up to 1000pF loads while maintaining stability at gain ≥10V/V, as stated in the "Features" section and verified in Figure TOC12 of the datasheet. This capability enables direct connection to ADC input capacitors or long PCB traces in photodiode preamp layouts without external isolation resistors.
Is the internal 1.2V reference accessible for external use in MAX952EUA+T?
Yes - pin 6 (REF/COMPIN−) provides the 1.2V ±2% bandgap reference voltage for external circuitry, such as biasing op amp stages or setting thresholds in auxiliary comparators. However, the datasheet strictly prohibits bypassing this pin and limits capacitive loading to <100pF to maintain stability and accuracy.
Does MAX952EUA+T require power-supply decoupling capacitors?
A 0.1µF ceramic capacitor from VDD (pin 8) to VSS (pin 4) is recommended per the "Power-Supply Bypassing" section of the datasheet. While not strictly mandatory for low-noise DC operation, this capacitor suppresses supply coupling from COMPOUT switching edges - critical for preventing crosstalk into the REF and AMPIN+ nodes in sensitive smoke detector designs.
How does the comparator hysteresis work in MAX952EUA+T?
The MAX952EUA+T comparator includes fixed ±3mV internal hysteresis centered on the trip point, ensuring clean output transitions even with slow-moving or noisy inputs like ionization chamber voltages. This eliminates the need for external positive-feedback resistors in most applications - simplifying layout and improving reliability in battery-powered safety devices.
MAX952EUA+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
MAX952EUA+T FAQ
1.How can I place an order for MAX952EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX952EUA+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 MAX952EUA+T reliable?
The price and inventory of MAX952EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX952EUA+T is usually 5 days.
3.What payment methods are accepted for MAX952EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX952EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX952EUA+T?
MAX952EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX952EUA+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 MAX952EUA+T?
For technical support, including MAX952EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX952EUA+T requirements.
6.How does Aetrix verify that MAX952EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX952EUA+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 MAX952EUA+T meets industry standards.
7.What is the process for return or replacement of MAX952EUA+T?
All MAX952EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX952EUA+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 MAX952EUA+T part is unused and in its original packaging.
Return procedure for MAX952EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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