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Analog Devices Inc./Maxim Integrated MAX952ESA+
- Part No.:
- MAX952ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX952ESA+.pdf
- Description:
- IC AMP COMP REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,148
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Product details
Overview
MAX952ESA+ 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 rail-to-rail output stage - all in an 8-pin SO package. It operates from 2.7V to 7V, draws 7μA typical supply current, and supports battery-powered instrumentation, infrared receivers, and smoke detector sensor preamplification.
For engineers reviewing the MAX952ESA+ datasheet, MAX952ESA+ pinout, MAX952ESA+ application, or MAX952ESA+ equivalent, key selection criteria include its 125kHz gain-bandwidth op amp (stable at AV ≥ 10V/V), comparator hysteresis (±3mV), rail-to-rail I/O swing, and integrated 1.2V reference accuracy over –40°C to +85°C.
Technical Context
The MAX952ESA+ combines three functional blocks on one die: a high-gain, decompensated op amp optimized for closed-loop gains ≥10V/V; a comparator with internal hysteresis and 40mA continuous output sourcing capability; and a buffered 1.2V ±2% bandgap reference tied to the comparator's inverting input. All blocks share a common 2.7V–7V single supply and operate across –40°C to +85°C.
Its rail-to-rail input range extends from VSS to (VDD – 1.6V), enabling ground-sensing operation, while both op amp and comparator outputs swing within 50mV of rails under 100kΩ load. The reference is stable with <100pF capacitive loads and must not be bypassed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 7V - enables direct use with single Li-ion, two alkaline, or regulated 3.3V/5V rails without level shifting. |
| Supply Current (Typ) | 7μA - supports multi-year battery life in always-on sensor monitoring applications like smoke detectors. |
| Op Amp Gain Bandwidth | 125kHz - sufficient for low-frequency signal conditioning (e.g., photodiode preamps, IR receivers up to 20kbps). |
| Comparator Propagation Delay | 4µs (VOD = 100mV) - ensures fast response to alarm thresholds in safety-critical detection circuits. |
| Reference Accuracy | 1.200V ±2% (–40°C to +85°C) - provides stable trip point for precision thresholding without external calibration. |
| Rail-to-Rail Output Swing | VOL = VSS + 50mV, VOH = VDD – 500mV (100kΩ load) - maximizes dynamic range in low-voltage systems. |
| Input Common-Mode Range | VSS to (VDD – 1.6V) - allows direct sensing of signals referenced to ground in single-supply configurations. |
Pinout & Package
MAX952ESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with 1.27mm lead pitch and surface-mount footprint per JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - AMPOUT | Op Amp Output | Drives loads up to 1000pF; rail-to-rail swing enables full utilization of supply voltage headroom. |
| 2 - AMPIN− | Inverting Op Amp Input | High-impedance CMOS node (IB < 0.05nA); requires short trace routing to minimize leakage and noise pickup. |
| 3 - AMPIN+ | Noninverting Op Amp Input | Accepts signals from VSS to (VDD – 1.6V); used with REF for precision DC-coupled amplification. |
| 4 - VSS | Negative Supply / Ground | Reference node for all internal circuitry; must be low-impedance and decoupled locally. |
| 5 - COMPIN+ | Noninverting Comparator Input | Differential input with ±3mV hysteresis; accepts slow-moving signals without oscillation. |
| 6 - REF / COMPIN− | 1.2V Reference Output & Inverting Comparator Input | Internally connected 1.2V ±2% reference; supplies fixed threshold to comparator; not bypassable. |
| 7 - COMPOUT | Comparator Output | CMOS rail-to-rail output capable of 40mA continuous sourcing; TTL-compatible with 5V ±10% supply. |
| 8 - VDD | Positive Supply | Single-supply input (2.7V–7V); requires local 0.1µF ceramic bypass capacitor to VSS. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.2V ±2% bandgap reference | Eliminates need for external reference IC or resistor divider, reducing BOM count and layout area in threshold-detection designs. |
| 125kHz op amp with gain ≥10V/V stability | Enables higher closed-loop gain than unity-stable variants (e.g., MAX951), improving SNR in low-frequency sensor interfaces. |
| ±3mV internal comparator hysteresis | Prevents chatter on noisy or slowly varying inputs-critical for reliable alarm triggering in safety sensors. |
| Rail-to-rail input/output swing | Maximizes usable signal range in 3.3V or lower systems, avoiding clipping and preserving resolution near supply rails. |
| 7μA typical supply current (op amp + comparator + reference) | Supports continuous operation in energy-constrained devices such as portable gas detectors or remote IR receivers. |
Applications
| Photodiode Preamp | Infrared Receiver Front End |
|---|---|
Use Scenario: Amplifying weak, low-frequency current from PIN photodiodes in remote control receivers. IC Role / Device Role / Timing Role: MAX952ESA+ op amp configured as transimpedance amplifier; comparator digitizes output with hysteresis for noise immunity. Use Value: 125kHz bandwidth and rail-to-rail output enable clean 38kHz carrier demodulation; integrated 1.2V reference sets precise comparator threshold without external components. | Use Scenario: Signal conditioning and threshold detection in consumer IR data links (e.g., TV remotes). IC Role / Device Role / Timing Role: MAX952ESA+ op amp acts as Delyiannis-Friend bandpass filter; comparator converts filtered AC signal to digital pulse train. Use Value: Internal hysteresis (±3mV) rejects ambient light interference; 7μA quiescent current extends battery life in handheld remotes. |
| Smoke Detector Sensor Interface | Low-Frequency Local Alarm |
Use Scenario: Buffering high-impedance ionization chamber voltage and triggering alarm when smoke increases ion current. IC Role / Device Role / Timing Role: MAX952ESA+ op amp buffers microamp-level chamber current; comparator compares against 1.2V reference to assert alarm. Use Value: Input bias current <0.05nA prevents loading of >50MΩ sensor node; rail-to-rail input allows direct ground-referenced sensing without level shifters. | Use Scenario: Threshold-based detection in battery-powered perimeter alarms or motion-triggered alerts. IC Role / Device Role / Timing Role: MAX952ESA+ comparator monitors analog sensor output (e.g., PIR, vibration) against stable 1.2V reference; op amp conditions signal if needed. Use Value: 4µs propagation delay ensures rapid alarm assertion; 40mA sourcing capability drives LEDs or small relays directly without external drivers. |
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 |
|---|---|---|---|
| MAX952EUA+ | Same die, 8-pin μMAX package (3mm × 3mm); identical electrical specs; higher thermal resistance (4.10mW/°C derating). | Better suited for space-constrained PCBs where SO footprint is too large; requires tighter layout control due to smaller pad pitch. | Select MAX952EUA+ only when board area is critical and thermal management is verified. |
| MAX951ESA+ | Unity-gain stable op amp (20kHz GBW), same reference/comparator; 7μA supply current; identical pinout and SO package. | Preferred for unity-gain buffer or low-gain signal conditioning where bandwidth <20kHz suffices; less suitable for higher-gain filtering. | Choose MAX951ESA+ when op amp gain ≤1V/V is required and 125kHz bandwidth is unnecessary. |
Compared with MAX952ESA+, MAX952EUA+ offers identical functionality in a smaller package but demands stricter thermal design, while MAX951ESA+ trades bandwidth for unity-gain stability-making it optimal for simpler buffering tasks without sacrificing supply current or reference accuracy.
Availability
MAX952ESA+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, infrared receivers, and smoke detector sensor interfaces requiring stable component supply across industrial temperature ranges.
Supply support for MAX952ESA+ 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 for ultra-low-power, single-supply sensor signal conditioning and threshold detection - targeting portable instruments, safety sensors, and energy-harvesting systems where micropower operation and integration reduce system complexity.
FAQ
What is the operating temperature range for MAX952ESA+?
The MAX952ESA+ is rated for operation from –40°C to +85°C, matching the extended industrial temperature grade defined in its datasheet. This range covers demanding environments such as building smoke detectors, outdoor alarm sensors, and portable test equipment. All electrical specifications-including 1.2V reference accuracy (±2%), 7μA supply current, and 125kHz op amp bandwidth-are guaranteed across this full range.
Can MAX952ESA+ drive a 1000pF capacitive load with the op amp?
Yes, the MAX952ESA+ op amp is designed to drive up to 1000pF capacitive loads while maintaining stability, as confirmed in the datasheet's "Op Amp Percent Overshoot vs. Capacitive Load" graph. This capability eliminates the need for external isolation resistors in photodiode preamp or sensor interface applications where long traces or PCB parasitics introduce significant capacitance.
Is the internal 1.2V reference on MAX952ESA+ bypassable?
No, the internal 1.2V reference on MAX952ESA+ must not be bypassed. The datasheet explicitly warns against adding any capacitor to the REF pin, as it destabilizes the reference buffer. The reference is stable only with capacitive loads under 100pF, and its output is intended for direct connection to COMPIN− or external high-impedance nodes (e.g., op amp noninverting input via resistor divider).
Does MAX952ESA+ support rail-to-rail input common-mode voltage?
Yes, MAX952ESA+ supports a common-mode input voltage range from VSS to (VDD – 1.6V) for both op amp and comparator inputs. This allows direct interfacing with ground-referenced sensors (e.g., ionization chambers, thermistors) without level-shifting circuitry - a key enabler for single-supply, low-voltage battery-operated systems.
What is the maximum continuous output sourcing current of the comparator in MAX952ESA+?
The comparator output of MAX952ESA+ can continuously source up to 40mA while maintaining microamp-level quiescent current. This capability allows direct driving of LEDs, small relays, or logic inputs without external buffers - simplifying designs in low-frequency alarm and indicator applications where fast edge rates are not required.
MAX952ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MAX952ESA+ FAQ
1.How can I place an order for MAX952ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX952ESA+ 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 MAX952ESA+ reliable?
The price and inventory of MAX952ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX952ESA+ is usually 5 days.
3.What payment methods are accepted for MAX952ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX952ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX952ESA+?
MAX952ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX952ESA+ 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 MAX952ESA+?
For technical support, including MAX952ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX952ESA+ requirements.
6.How does Aetrix verify that MAX952ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX952ESA+ 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 MAX952ESA+ meets industry standards.
7.What is the process for return or replacement of MAX952ESA+?
All MAX952ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX952ESA+, 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 MAX952ESA+ part is unused and in its original packaging.
Return procedure for MAX952ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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