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Analog Devices Inc./Maxim Integrated MAX952EUA+
- Part No.:
- MAX952EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX952EUA+.pdf
- Description:
- IC AMP COMP REF 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,992
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Product details
Overview
MAX952EUA+ from Maxim Integrated is a micropower, 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, infrared receivers, and smoke detector sensor interfaces.
For engineers reviewing the MAX952EUA+ datasheet, MAX952EUA+ pinout, MAX952EUA+ application, or MAX952EUA+ equivalent, key selection criteria include its 10V/V minimum stable gain, ±3mV internal comparator hysteresis, rail-to-rail output swing, and guaranteed operation across –40°C to +85°C - critical for low-power, high-impedance sensing and threshold-detection designs.
Technical Context
The MAX952EUA+ implements a dual-function analog front-end: its decompensated op amp delivers 125kHz gain-bandwidth and 66V/ms slew rate only when configured for ≥10V/V closed-loop gain, while its comparator features a dedicated inverting input tied to an internal 1.2V reference and outputs capable of continuous 40mA sourcing. Both blocks share a common rail-to-rail input range (VSS to VDD–1.6V) and rail-to-rail CMOS output stage.
This architecture enables simultaneous signal conditioning (e.g., photodiode preamplification) and precise voltage-level detection (e.g., alarm triggering) within one ultra-low-quiescent-current device - eliminating inter-device timing skew and supply noise coupling inherent in discrete op amp + comparator solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 7V - supports single-cell Li-ion (3.0–3.7V), two-cell alkaline (2.7–3.2V), and regulated 5V systems without level-shifting. |
| Supply Current (Typ) | 7μA - enables >10-year battery life in coin-cell–powered detectors with continuous monitoring. |
| Op Amp Gain Bandwidth | 125kHz at AV ≥ 10V/V - suitable for low-frequency sensor amplification (e.g., smoke chamber voltage buffering) with stable phase margin. |
| Comparator Propagation Delay | 4µs at 100mV overdrive (CL = 100pF) - ensures fast response to alarm-level thresholds in safety-critical applications. |
| Reference Accuracy | 1.200V ±2% (–40°C to +85°C) - provides stable, temperature-compensated trip point for comparator without external components. |
| Input Common-Mode Range | VSS to VDD–1.6V - allows direct interface to ground-referenced sensors (e.g., ionization chambers) and single-supply signal sources. |
| Output Swing | Rail-to-rail (VSS to VDD) - maximizes dynamic range for ADC input driving or logic-level interfacing with minimal headroom loss. |
Pinout & Package
MAX952EUA+ is housed in an 8-pin μMAX package (2.1mm × 2.3mm, 0.5mm pitch), optimized for space-constrained portable and safety-critical systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AMPOUT | Op Amp Output | Drives capacitive loads up to 1000pF; rail-to-rail swing enables full utilization of supply voltage for signal chain headroom. |
| 2 - AMPIN− | Inverting Op Amp Input | High-impedance CMOS node (IB < 5pA); requires short PCB traces to minimize leakage-induced offset in high-Z sensor interfaces. |
| 3 - AMPIN+ | Noninverting Op Amp Input | Accepts signals from VSS to VDD–1.6V; used for reference-biased sensor buffers (e.g., smoke chamber intermediate plate). |
| 4 - VSS | Negative Supply / Ground | System ground reference for both op amp and comparator; must be low-impedance to avoid crosstalk into REF and COMPOUT. |
| 5 - COMPIN+ | Noninverting Comparator Input | Detects rising input above internal 1.2V reference; supports external hysteresis via feedback resistors for noise immunity in slow-moving signals. |
| 6 - REF / COMPIN− | 1.2V Reference Output & Inverting Comparator Input | Internally connected node; supplies precision 1.2V reference to comparator and external circuitry; not bypassable (capacitive load < 100pF). |
| 7 - COMPOUT | Comparator Output | CMOS rail-to-rail output sourcing up to 40mA continuously; TTL-compatible with 5V ±10% supply; no crowbar current during switching. |
| 8 - VDD | Positive Supply | Single-supply input (2.7–7V); requires local 0.1µF ceramic bypass to VSS per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.2V ±2% bandgap reference | Eliminates need for external voltage reference IC or resistor divider, reducing BOM count and layout area in threshold-detection circuits. |
| ±3mV internal comparator hysteresis | Ensures clean, bounce-free switching on slow-rising inputs (e.g., smoke chamber voltage drift), avoiding false alarms without external components. |
| Op amp stable at AV ≥ 10V/V with 125kHz GBW | Enables high-gain, low-noise amplification of weak sensor signals (e.g., photodiode current) while maintaining stability into 1000pF loads. |
| Rail-to-rail I/O with VSS-to-(VDD–1.6V) input range | Permits direct interface to ground-referenced high-impedance sources (e.g., ionization chambers) and full-swing output into ADCs or logic. |
| Ultra-low 7μA supply current (typ) | Supports always-on monitoring in battery-powered safety devices (e.g., smoke/CO detectors) with multi-year operational lifetime. |
Applications
| Photodiode Preamp | Infrared Receiver Front End |
|---|---|
Use Scenario: Amplifying weak current from IR photodiodes (e.g., NEC PH302B) in remote control receivers operating at ~38kHz carrier frequency. IC Role / Device Role / Timing Role: MAX952EUA+ op amp acts as Delyiannis-Friend bandpass filter preamplifier; comparator discriminates filtered signal into clean digital pulses. Use Value: Integrated reference eliminates external bias network; rail-to-rail output drives logic directly; 7μA quiescent current extends battery life in handheld remotes. | Use Scenario: Signal conditioning and threshold detection in low-frequency RF alarm receivers (e.g., perimeter intrusion sensors at ~10kHz). IC Role / Device Role / Timing Role: MAX952EUA+ op amp amplifies resonant tank output; comparator provides adjustable signal-strength trigger with hysteresis for noise immunity. Use Value: Single-chip solution reduces board area and inter-stage coupling; internal 1.2V reference ensures consistent trip point across temperature and supply variation. |
| Smoke Detector Sensor Interface | Low-Power Instrumentation Terminal |
Use Scenario: Buffering high-impedance voltage from ionization chamber intermediate plate and triggering alarm when smoke increases ion current. IC Role / Device Role / Timing Role: MAX952EUA+ op amp provides unity-gain buffer (high-Z input, low output impedance); comparator compares buffered voltage against internal 1.2V reference. Use Value: Input bias current < 5pA prevents charge leakage errors; 7μA supply current enables continuous monitoring without duty cycling. | Use Scenario: Analog front-end in handheld test equipment (e.g., bar-code readers, portable multimeters) requiring precision DC amplification and level detection. IC Role / Device Role / Timing Role: MAX952EUA+ op amp conditions sensor output; comparator validates pass/fail thresholds; reference stabilizes measurement accuracy. Use Value: Single 8-pin μMAX replaces three discrete ICs; rail-to-rail I/O maximizes ADC resolution; –40°C to +85°C rating supports industrial field use. |
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 electrical specs; SO-8 package (4.9mm × 6.0mm) vs. μMAX (2.1mm × 2.3mm) | Preferred where board space permits and hand-soldering or thermal mass requirements favor SOIC | Select MAX952ESA+ for easier prototyping, higher power dissipation margin, or legacy SO-8 footprint compatibility. |
| TLV2302IDR | Separate micropower op amp (1.2μA) + comparator (1.8μA); no integrated reference; SOT-23-8 package | Requires external 1.2V reference (e.g., REF3012) and additional passives for hysteresis and biasing | Choose TLV2302IDR only if system already uses discrete reference or demands independent op amp/comparator optimization. |
Compared with MAX952ESA+, the MAX952EUA+ saves >80% board area and simplifies layout by integrating reference and hysteresis; compared with TLV2302IDR, it reduces component count by three and eliminates reference accuracy drift and external hysteresis design effort.
Availability
MAX952EUA+ is available at Aetrix Electronics and suitable for battery-powered instruments, infrared receivers, and smoke detector sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for MAX952EUA+ 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 applications.
The MAX951–MAX954 family was engineered to deliver ultra-low-power, single-supply analog front-ends for safety-critical and portable systems - combining op amp, comparator, and reference functions without compromising DC accuracy or temperature stability.
FAQ
What is the maximum capacitive load the MAX952EUA+ op amp can drive while remaining stable?
The MAX952EUA+ op amp is specified to drive up to 1000pF capacitive load while maintaining stability at gains ≥10V/V. This capability enables direct connection to ADC input capacitors or long PCB traces without external isolation resistors - critical for compact sensor interface designs where board space is constrained and signal integrity must be preserved.
Does the MAX952EUA+ require external hysteresis for reliable comparator operation?
No - the MAX952EUA+ includes ±3mV internal hysteresis on its comparator, ensuring clean output transitions even with slow-moving or noisy input signals. External hysteresis is optional and only needed when higher noise immunity is required; adding it increases supply current and slows response time, so it should be avoided unless validated by system-level noise testing.
Can the internal 1.2V reference of the MAX952EUA+ be used to bias external circuitry?
Yes - the REF pin (Pin 6) provides a buffered 1.2V ±2% output capable of sourcing/sinking ±20μA. It is designed for use as a precision bias voltage for external op amps, ADC references, or sensor excitation. However, it must not be bypassed with capacitance >100pF, as this risks instability and reference voltage droop under load.
What is the operating temperature range guaranteed for the MAX952EUA+?
The MAX952EUA+ is rated for continuous operation from –40°C to +85°C (industrial grade). This range is fully characterized and guaranteed across all key parameters including supply current, reference voltage, input offset, and propagation delay - making it suitable for outdoor, automotive cabin, and industrial control environments without derating.
How does the MAX952EUA+ differ from the MAX951EUA+ in terms of op amp performance?
The MAX952EUA+ op amp is decompensated for ≥10V/V gain, delivering 125kHz gain-bandwidth and 66V/ms slew rate, whereas the MAX951EUA+ op amp is unity-gain stable with 20kHz bandwidth and 12.5V/ms slew rate. Both share identical comparator, reference, and supply current specs - so choose MAX952EUA+ when higher closed-loop gain and faster transient response are required.
MAX952EUA+ 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:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
MAX952EUA+ FAQ
1.How can I place an order for MAX952EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX952EUA+ 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+ reliable?
The price and inventory of MAX952EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX952EUA+ is usually 5 days.
3.What payment methods are accepted for MAX952EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX952EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX952EUA+?
MAX952EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX952EUA+ 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+?
For technical support, including MAX952EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX952EUA+ requirements.
6.How does Aetrix verify that MAX952EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX952EUA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX952EUA+?
All MAX952EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX952EUA+, 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+ part is unused and in its original packaging.
Return procedure for MAX952EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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