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Analog Devices Inc./Maxim Integrated MAX9003ESA
- Part No.:
- MAX9003ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9003ESA.pdf
- Description:
- IC AMP COMP REF 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,048
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Product details
Overview
MAX9003ESA from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated operational amplifier (AV ≥10V/V), an 185ns comparator, and a precision 1.230V ±1% reference. It operates from +2.5V to +5.5V, draws 410µA typical supply current, delivers rail-to-rail outputs (±2.5mA op-amp / ±4.0mA comparator), and features ground-sensing inputs. It is used in photodiode preamps, zero-crossing detectors, and smart card readers where space-constrained, battery-aware signal conditioning is required.
For engineers reviewing the MAX9003ESA datasheet, MAX9003ESA pinout, MAX9003ESA application, or MAX9003ESA equivalent, this page provides 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 packaging differences.
Technical Context
The MAX9003ESA integrates three independent but co-located functional blocks: a decompensated op amp (stable only at closed-loop gains ≥10V/V, GBW = 8MHz, SR = 6.0V/µs), a comparator with internal 1.230V reference connection to CIN−, and a buffered bandgap reference (1.230V ±1%, 8ppm/°C, ±1mA drive). All blocks share a common +2.5V to +5.5V single supply and operate across −40°C to +85°C.
Its comparator includes ±2mV input-referred hysteresis for noise immunity and eliminates supply glitches via proprietary output-stage cross-conduction reduction. The op amp supports capacitive loads up to 250pF, while the reference remains stable with up to 100nF load capacitance - enabling direct interface with ADC reference inputs or filter networks without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - enables direct operation from Li-ion, USB, or regulated 3.3V/5V rails without level-shifting. |
| Op Amp Gain-Bandwidth | 8MHz at AV ≥10V/V - supports stable closed-loop amplification of signals up to ~800kHz at gain=10, suitable for sensor signal conditioning before ADC sampling. |
| Comparator Propagation Delay | 185ns typical - ensures fast edge detection in timing-critical applications like zero-crossing or pulse-width measurement. |
| Reference Accuracy & Drift | 1.230V ±1% initial, 8ppm/°C - provides stable reference for precision comparators or ADCs over industrial temperature range without calibration. |
| Quiescent Current | 410µA typical - allows continuous operation in always-on sensor nodes powered by coin cells or energy-harvesting sources. |
| Input Common-Mode Range | 150mV below VSS to VDD −1.2V (op amp), VDD −1.1V (comparator) - supports ground-referenced inputs in single-supply systems without level-shifting circuitry. |
| Rail-to-Rail Output Swing | VOL ≤2mV, VOH ≥VDD −2mV (RL = 1kΩ) - maximizes dynamic range and simplifies interfacing with CMOS logic or SAR ADCs requiring full-scale input swing. |
Pinout & Package
MAX9003ESA is housed in an 8-pin SO (Small Outline) package, measuring 4.9mm × 3.9mm × 1.75mm, with standard 1.27mm pitch and gull-wing leads. It is RoHS-compliant and rated for −40°C to +85°C operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | AOUT | Op-amp output - drives loads up to ±2.5mA; rail-to-rail swing enables full utilization of ADC input range. |
| 2 | AIN− | Inverting op-amp input - high-impedance MOS input (IBIAS ≤±2nA) minimizes loading on high-Z sensors like photodiodes. |
| 3 | AIN+ | Noninverting op-amp input - same high-impedance input as AIN−; supports differential or single-ended configurations. |
| 4 | VSS | Negative supply / ground - reference point for all analog blocks; must be low-impedance to avoid PSRR degradation. |
| 5 | VDD | Positive supply - powers all internal blocks; requires local 0.1µF ceramic bypass capacitor per layout guidelines. |
| 6 | COUT | Comparator output - rail-to-rail CMOS output capable of sinking/sourcing ±4.0mA; TTL/CMOS compatible. |
| 7 | CIN+ | Noninverting comparator input - accepts signals referenced to VSS; used for threshold comparison against internal reference. |
| 8 | REF | Internal reference output - provides 1.230V ±1% voltage; can source/sink up to 1mA; connects internally to CIN− in MAX9003ESA. |
Key Features
| Feature | Design Value |
|---|---|
| Op amp + comparator + reference integration | Reduces BOM count and PCB area by consolidating three critical analog functions into one 8-pin SO package. |
| Decompensated op amp (AV ≥10V/V) | Enables higher bandwidth (8MHz GBW) than unity-gain-stable variants - ideal for fixed-gain sensor amplifiers needing speed. |
| Comparator with built-in ±2mV hysteresis | Eliminates need for external hysteresis resistors and prevents chatter on slow or noisy inputs like thermistor or proximity signals. |
| Reference-connected CIN− | Hardwired internal connection between REF and CIN− simplifies zero-crossing or threshold-detection circuits - no external routing required. |
| Rail-to-rail I/O with ground-sensing inputs | Supports direct interface with 0–VDD input signals (e.g., photodiode current converted to voltage) and full-swing digital logic without level shifters. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Amplifying weak current from a reverse-biased photodiode in optical smoke detectors or ambient light sensors. IC Role / Device Role: Op amp configured as transimpedance amplifier (TIA); comparator monitors amplified output against internal 1.230V reference to detect light threshold crossing. Use Value: Single-chip solution eliminates discrete op amp + reference + comparator layout complexity and matching errors; 410µA quiescent current extends battery life in portable units. |
Use Scenario: Detecting AC line zero crossings in TRIAC-based dimmers or motor phase-control circuits. IC Role / Device Role: Comparator uses internal 1.230V reference tied to CIN−, while CIN+ receives scaled AC waveform; hysteresis prevents false triggering near zero. Use Value: Eliminates external reference and hysteresis components; 185ns propagation delay ensures precise timing control within 1% of 50/60Hz cycle. |
| Smart Card Reader | Infrared Receiver |
|
Use Scenario: Conditioning and threshold-detecting analog signals from ISO 7816 smart card contact interfaces during power-up and data exchange. IC Role / Device Role: Op amp buffers and filters card voltage signatures; comparator validates presence and protocol-level voltage thresholds using internal reference. Use Value: Integrates reference accuracy (±1%) and comparator speed (185ns) needed for EMV-compliant timing windows; SO package fits compact reader PCBs. |
Use Scenario: Demodulating pulsed IR signals from remote controls in consumer electronics (TVs, set-top boxes). IC Role / Device Role: Op amp amplifies weak IR phototransistor output; comparator compares against internal 1.230V reference to regenerate clean digital pulses. Use Value: Rail-to-rail outputs ensure compatibility with downstream microcontroller GPIO; low 410µA supply current reduces standby power in always-listening receivers. |
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 |
|---|---|---|---|
| MAX9000ESA | Unity-gain stable op amp (GBW = 1.25MHz), no shutdown, same 8-pin SO package and REF/CIN− connection. | Better suited for variable-gain or unity-gain buffer applications; lower bandwidth limits high-frequency signal conditioning. | Select when gain flexibility or unity-gain stability is required; not drop-in for fixed high-gain designs needing 8MHz GBW. |
| TLV2304IPW | Separate dual op amp (no comparator or reference); requires external reference and comparator; 14-pin TSSOP package. | Higher component count and board area; lacks integrated hysteresis and reference accuracy. | Choose only if system already uses discrete reference/comparator and needs additional op amp channels beyond MAX9003ESA's single amplifier. |
Compared with MAX9000ESA, MAX9003ESA trades unity-gain stability for 6.4× higher op amp bandwidth - critical for fast sensor signals - while retaining identical reference and comparator functionality. TLV2304IPW offers channel count but introduces design complexity, layout overhead, and performance uncertainty versus the fully characterized, integrated MAX9003ESA.
Availability
MAX9003ESA is available at Aetrix Electronics and suitable for photodiode preamplification, zero-crossing detection, and smart card reader signal conditioning requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature range (−40°C to +85°C).
Supply support for MAX9003ESA 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 and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX9000–MAX9005 family was designed to deliver integrated precision analog signal conditioning - combining op amp, comparator, and reference - in minimal footprint for space- and power-constrained portable and embedded systems.
FAQ
What is the maximum closed-loop gain supported by the op amp in MAX9003ESA?
The op amp in MAX9003ESA is decompensated and specified for stable operation only at closed-loop gains of +10V/V or greater. Attempting unity-gain or gains below 10V/V may cause oscillation or excessive overshoot. This design enables its 8MHz gain-bandwidth product and 6.0V/µs slew rate - making MAX9003ESA optimal for fixed high-gain sensor amplification, unlike unity-gain-stable variants such as MAX9000ESA.
How is the internal reference connected to the comparator in MAX9003ESA?
In MAX9003ESA, the internal 1.230V reference output (pin 8, REF) is hardwired to the comparator's inverting input (CIN−, pin 5). This eliminates external routing and ensures precise, low-noise threshold setting for zero-crossing or level-detection applications. Users apply the signal to CIN+ (pin 7); no external reference or resistor network is needed - a key differentiator from MAX9002ESA or MAX9005ESA, which expose CIN− externally.
Does MAX9003ESA include a shutdown feature?
No, MAX9003ESA does not include a shutdown feature. Shutdown capability is exclusive to MAX9001 and MAX9004 variants (e.g., MAX9001EUB, MAX9004ESD), which add a SHDN pin and reduce supply current to 2µA in disabled mode. MAX9003ESA maintains continuous 410µA operation - appropriate for always-active monitoring circuits where wake-up latency is irrelevant and simplicity is prioritized.
What is the capacitive load limit for stable operation of the MAX9003ESA op amp and reference?
The op amp in MAX9003ESA remains stable with capacitive loads up to 250pF, supporting direct driving of ADC input capacitors or RC anti-aliasing filters. The internal reference (pin 8) is stable with capacitive loads up to 100nF, allowing use with bulk decoupling or low-pass filtering without external buffer stages - a critical advantage over discrete reference ICs that require careful output capacitance management.
Can MAX9003ESA operate from a 3.3V supply?
Yes, MAX9003ESA is fully specified for operation from +2.5V to +5.5V single supply, including standard 3.3V rails. At VDD = 3.3V, it maintains rail-to-rail output swing (VOL ≤2mV, VOH ≥3.298V), 185ns comparator propagation delay, and 1.230V reference accuracy (±1%). Its 410µA typical supply current ensures efficient operation in 3.3V-powered IoT sensor nodes and portable instrumentation.
MAX9003ESA 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:
- Obsolete
- Type:
- Amplifier, Comparator, Reference
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MAX9003ESA FAQ
1.How can I place an order for MAX9003ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9003ESA 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 MAX9003ESA reliable?
The price and inventory of MAX9003ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9003ESA is usually 5 days.
3.What payment methods are accepted for MAX9003ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9003ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9003ESA?
MAX9003ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9003ESA 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 MAX9003ESA?
For technical support, including MAX9003ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9003ESA requirements.
6.How does Aetrix verify that MAX9003ESA is sourced from the original manufacturer or authorized distributors?
All MAX9003ESA 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 MAX9003ESA meets industry standards.
7.What is the process for return or replacement of MAX9003ESA?
All MAX9003ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX9003ESA, 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 MAX9003ESA part is unused and in its original packaging.
Return procedure for MAX9003ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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