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Analog Devices Inc./Maxim Integrated MAX9005ESA+T
- Part No.:
- MAX9005ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9005ESA+T.pdf
- Description:
- IC AMP COMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,890
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Product details
Overview
MAX9005ESA+T from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated operational amplifier (GBW = 8MHz, AV ≥ 10V/V), a 185ns comparator with ±2mV internal hysteresis, and no internal voltage reference. It operates from +2.5V to +5.5V, draws 340µA quiescent current at 5V, supports rail-to-rail outputs (±4mA comparator drive), and features ground-sensing inputs (down to VSS − 150mV). It is used in photodiode preamps, zero-crossing detectors, and sensor signal conditioning where compact integration and fast response are critical.
For engineers reviewing the MAX9005ESA+T datasheet, MAX9005ESA+T pinout, MAX9005ESA+T application, or MAX9005ESA+T equivalent, this page delivers verified technical context, exact pin functions for SO-8 package, real-world design implications of its 8MHz GBW and 185ns propagation delay, and two validated alternative parts with documented functional trade-offs.
Technical Context
The MAX9005ESA+T implements a decompensated op amp optimized for closed-loop gains ≥10V/V, delivering 8MHz gain-bandwidth and 6.0V/µs slew rate - enabling high-speed signal conditioning without stability compromises. Its comparator uses bipolar input stage with rail-to-rail CMVR (VSS − 150mV to VDD − 1.1V) and proprietary output architecture that minimizes supply glitches during transitions.
No internal reference is present; the CIN− pin is externally accessible (unlike MAX9000/MAX9003), allowing flexible threshold configuration. Input offset voltage is ±1.5mV max over temperature, and comparator hysteresis remains stable at ±2mV across −40°C to +85°C - critical for noise-immune edge detection in industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion battery systems and 3.3V/5V logic without level-shifting. |
| Quiescent Current | 340µA at 5V - supports always-on sensor nodes with multi-year battery life in portable instrumentation. |
| Op Amp Gain-Bandwidth | 8MHz at AV ≥ 10V/V - allows stable amplification of >1MHz signals (e.g., IR receiver bursts) with minimal phase lag. |
| Comparator Propagation Delay | 185ns at 50mV overdrive - ensures sub-200ns response for zero-crossing detection in motor control timing loops. |
| Input Common-Mode Range | VSS − 150mV to VDD − 1.1V - permits direct sensing of ground-referenced transducer outputs without bias resistors. |
| Rail-to-Rail Output Drive | ±4.0mA comparator / ±2.5mA op amp - drives 1kΩ loads directly while maintaining full swing (e.g., TTL-compatible logic inputs). |
| Comparator Hysteresis | ±2mV input-referred - suppresses chatter on slow-moving signals like thermistor outputs or proximity sensor ramps. |
Pinout & Package
MAX9005ESA+T is housed in an 8-pin SO (Small Outline) package, 150mil width, with standard JEDEC MS-012AC footprint and gull-wing leads. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AOUT) | Op-Amp Output | Delivers rail-to-rail output (VSS to VDD) with ±2.5mA drive; connects directly to ADC input or filter network. |
| 2 (AIN−) | Inverting Op-Amp Input | High-impedance MOS node; accepts differential or single-ended feedback configurations up to 10V/V gain. |
| 3 (AIN+) | Noninverting Op-Amp Input | Ground-sensing input (VSS − 150mV min); used for single-supply transducer interfacing without DC bias. |
| 4 (VSS) | Negative Supply / Ground | Reference for all internal circuits; must be connected to system ground plane for noise immunity. |
| 5 (CIN−) | Inverting Comparator Input | Externally accessible threshold input - enables custom reference or hysteresis via external resistor divider. |
| 6 (CIN+) | Noninverting Comparator Input | High-Z bipolar input; accepts fast analog signals (e.g., photodiode current converted to voltage). |
| 7 (COUT) | Comparator Output | Rail-to-rail CMOS output driving ±4mA; compatible with 74HC logic and microcontroller interrupt pins. |
| 8 (VDD) | Positive Supply | +2.5V to +5.5V input; requires local 0.1µF ceramic bypass capacitor placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated op amp | Stable at AV ≥ 10V/V with 8MHz GBW - eliminates need for external compensation capacitors in gain-of-10 sensor amps. |
| Comparator with built-in hysteresis | ±2mV input-referred hysteresis - prevents false triggering on EMI-coupled or noisy sensor lines without external components. |
| Rail-to-rail I/O | Outputs swing within 5mV of VSS/VDD - maximizes dynamic range for 12-bit ADCs operating on 3.3V supplies. |
| Ground-sensing inputs | Operates with inputs down to VSS − 150mV - enables direct connection to current-output sensors (e.g., 4–20mA loop receivers). |
| No internal reference | CIN− pin exposed - allows precise external threshold setting using precision resistors or DACs for programmable trip points. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Amplifying weak current from IR photodiodes in remote controls or optical encoders. IC Role / Device Role / Timing Role: Op amp configured as transimpedance amplifier (TIA) with 10MΩ feedback; comparator detects crossing of amplified signal against adjustable threshold. Use Value: 8MHz GBW enables accurate amplification of >100kHz modulated IR carriers; 185ns comparator delay ensures <200ns timing resolution for pulse-width decoding. |
Use Scenario: Detecting AC line zero crossings in smart energy meters or TRIAC dimmers. IC Role / Device Role / Timing Role: Op amp buffers and conditions sine wave; comparator with ±2mV hysteresis triggers clean digital edge at each zero crossing. Use Value: Ground-sensing inputs accept transformer-coupled AC signals referenced to system ground; rail-to-rail outputs interface directly with microcontroller GPIOs. |
| Sensor Signal Detection | Smart Card Reader Interface |
|
Use Scenario: Conditioning analog outputs from pressure or temperature sensors before ADC sampling. IC Role / Device Role / Timing Role: Op amp provides gain and filtering; comparator acts as window detector or over-range alarm generator. Use Value: 340µA supply current enables continuous monitoring in battery-powered IoT nodes; ±1.5mV max VOS ensures <0.1% measurement error at 1.5V full-scale. |
Use Scenario: Interfacing ISO 7816 smart card contacts (C6/C8) requiring precise voltage thresholds and fast response. IC Role / Device Role / Timing Role: Comparator monitors card presence and protocol timing; op amp conditions card analog signals (e.g., clock recovery). Use Value: 185ns propagation delay meets ISO 7816-3 timing requirements for ATR (Answer-to-Reset); CIN− accessibility allows precise 1.8V/3.0V/5.0V threshold selection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp + comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9002ESA+ | Identical pinout, same 340µA supply current and 8MHz GBW op amp, but includes internal 1.230V reference (±1%, 8ppm/°C). | Eliminates external reference for fixed-threshold comparators; adds 1mA reference sink/source capability. | Select MAX9002ESA+ when a stable internal reference simplifies BOM and layout - e.g., in cost-sensitive consumer devices with fixed trip points. |
| TLV3701IDBVR | Single comparator only (no op amp or reference); 1.8V–5.5V supply; 350ns propagation delay; 12µA supply current. | Lacks integrated amplification - requires external op amp for signal conditioning; ultra-low power suits long-life battery apps. | Select TLV3701IDBVR when only comparator functionality is needed and power budget is <10µA - e.g., wake-up circuits in wearables. |
Compared with MAX9002ESA+, MAX9005ESA+ trades internal reference capability for reduced die area and lower cost in applications where threshold is set externally; versus TLV3701IDBVR, it delivers integrated signal conditioning at higher speed but with 30× higher quiescent current - ideal for space-constrained industrial sensors needing both gain and decision logic.
Availability
MAX9005ESA+T is available at Aetrix Electronics and suitable for photodiode preamplifiers, zero-crossing detectors, and sensor signal detection systems requiring stable component supply, guaranteed SO-8 packaging, and production-ready lead times.
Supply support for MAX9005ESA+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 and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing low power, high accuracy, and integration density.
The MAX9000–MAX9005 family targets space-constrained, battery-sensitive applications requiring combined amplification, comparison, and reference functions - reducing board area and component count in portable instrumentation and sensor interfaces.
FAQ
What is the maximum closed-loop gain supported by the op amp in MAX9005ESA+T?
The op amp in MAX9005ESA+T is decompensated and stable only for closed-loop gains of +10V/V or greater. Attempting unity-gain or gains below 10V/V will cause instability and oscillation. This design enables its 8MHz gain-bandwidth product and 6.0V/µs slew rate - making MAX9005ESA+T optimal for fixed-gain sensor signal chains, not general-purpose amplification.
Does MAX9005ESA+T include an internal voltage reference?
No, MAX9005ESA+T does not include an internal voltage reference. Unlike MAX9000/MAX9002/MAX9003, it exposes the CIN− pin externally, allowing designers to set custom comparator thresholds using external resistors, DACs, or precision references. This provides flexibility in multi-voltage systems where fixed 1.230V thresholds are unsuitable.
What is the purpose of the ±2mV hysteresis in the MAX9005ESA+T comparator?
The ±2mV input-referred hysteresis in MAX9005ESA+T prevents output oscillation when the input signal changes slowly near the switching threshold - common with thermistors, potentiometers, or noisy sensor outputs. It ensures clean, chatter-free digital edges without requiring external positive feedback resistors, simplifying PCB layout and improving reliability in industrial environments.
Can MAX9005ESA+T operate from a 2.5V supply?
Yes, MAX9005ESA+T is fully specified from +2.5V to +5.5V. At 2.5V, it maintains rail-to-rail output swing (within 5mV of rails), 185ns comparator propagation delay, and 340µA typical supply current. Its ground-sensing inputs (down to VSS − 150mV) enable direct interfacing with 2.5V logic and low-voltage transducers without level shifters.
How does the MAX9005ESA+T comparator minimize power-supply glitches?
MAX9005ESA+T uses a proprietary CMOS output stage that substantially reduces cross-conduction current during output transitions. This design limits transient current spikes into the VDD rail - preventing the supply voltage droop or noise that can disrupt adjacent analog circuits or microcontrollers, a critical advantage in mixed-signal systems where clean power integrity is essential.
MAX9005ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Amplifier, Comparator
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MAX9005ESA+T FAQ
1.How can I place an order for MAX9005ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9005ESA+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 MAX9005ESA+T reliable?
The price and inventory of MAX9005ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9005ESA+T is usually 5 days.
3.What payment methods are accepted for MAX9005ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9005ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9005ESA+T?
MAX9005ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9005ESA+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 MAX9005ESA+T?
For technical support, including MAX9005ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9005ESA+T requirements.
6.How does Aetrix verify that MAX9005ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX9005ESA+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 MAX9005ESA+T meets industry standards.
7.What is the process for return or replacement of MAX9005ESA+T?
All MAX9005ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9005ESA+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 MAX9005ESA+T part is unused and in its original packaging.
Return procedure for MAX9005ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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