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Analog Devices Inc./Maxim Integrated MAX9005ESA+
- Part No.:
- MAX9005ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9005ESA+.pdf
- Description:
- IC AMP COMP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,699
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Product details
Overview
MAX9005ESA+ from Maxim Integrated is a low-power, high-speed, single-supply analog IC integrating a decompensated operational amplifier (AV ≥10V/V, 8MHz GBW), a 185ns comparator, and no internal voltage reference. It operates from +2.5V to +5.5V, draws 340µA quiescent current at 5V, supports rail-to-rail output swing (±4mA drive), and features ground-sensing inputs extending to within 1.2V of VDD for the op amp and 1.1V for the comparator - enabling precision signal conditioning in battery-powered photodiode preamps and zero-crossing detectors.
For engineers reviewing the MAX9005ESA+ datasheet, MAX9005ESA+ pinout, MAX9005ESA+ application, or MAX9005ESA+ equivalent, this device is selected when a stable gain-of-10+ op amp, fast comparator with ±2mV hysteresis, and external reference flexibility are required - especially where space-constrained SO-8 packaging, low supply current, and rail-to-rail operation at 2.5V–5.5V are critical.
Technical Context
The MAX9005ESA+ implements a decompensated CMOS op amp optimized for closed-loop gains ≥10V/V, delivering 8MHz gain-bandwidth and 6.0V/µs slew rate while maintaining stability with capacitive loads up to 250pF. Its comparator uses bipolar differential inputs with ±2mV built-in hysteresis and achieves 185ns propagation delay at 50mV overdrive, with rail-to-rail CMOS output capable of ±4.0mA drive.
Unlike MAX9000/MAX9001/MAX9003/MAX9004, the MAX9005ESA+ omits the internal 1.230V reference and exposes the comparator's inverting input (CIN−) externally - allowing flexible reference sourcing (e.g., external DAC or precision resistor divider) and eliminating reference-related tempco or load-regulation constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V - enables direct interface with Li-ion, 3.3V, and 5V logic without level-shifting. |
| Op Amp Gain-Bandwidth | 8MHz - supports stable closed-loop gain ≥10V/V for high-frequency signal amplification (e.g., IR receiver baseband). |
| Comparator Propagation Delay | 185ns - ensures fast response in zero-crossing detection and keyless entry timing-critical edge sensing. |
| Quiescent Supply Current | 340µA at 5V - extends battery life in portable smart card readers and sensor nodes. |
| Input Common-Mode Range | VSS −0.15V to VDD −1.2V (op amp); VSS −0.15V to VDD −1.1V (comparator) - allows ground-referenced sensor interfacing without level shifters. |
| Rail-to-Rail Output Drive | ±4.0mA (comparator), ±2.5mA (op amp) - directly drives 10kΩ loads or logic inputs without external buffers. |
| Capacitive Load Stability | 250pF (op amp), no limit specified for comparator - simplifies layout with long traces or ADC input filtering. |
Pinout & Package
MAX9005ESA+ is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 4.0mm, 1.75mm height), compatible with automated SMT assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts +2.5V to +5.5V; requires local 0.1µF ceramic bypass to VSS. |
| 2 - AIN− | Inverting op amp input | High-impedance MOS node; used for feedback or differential sensing. |
| 3 - AIN+ | Noninverting op amp input | Ground-sensing input down to VSS −0.15V; suitable for single-ended sensor interfaces. |
| 4 - VSS | Negative supply / ground | Reference for all analog circuitry; must be low-impedance ground plane connection. |
| 5 - CIN− | Inverting comparator input | Externally accessible - enables user-defined threshold via external reference or DAC. |
| 6 - CIN+ | Noninverting comparator input | High-impedance bipolar input; accepts slow-moving signals with ±2mV hysteresis immunity. |
| 7 - COUT | Comparator output | Rail-to-rail CMOS output; sinks/sourses ±4mA; TTL/CMOS-compatible at 5V. |
| 8 - AOUT | Op amp output | Rail-to-rail CMOS output; drives ±2.5mA; stable with 250pF capacitive load. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated op amp (AV ≥10V/V) | Enables 8MHz bandwidth at gain ≥10 - ideal for high-gain photodiode transimpedance stages. |
| Comparator with ±2mV hysteresis | Eliminates oscillation on noisy or slow-rising inputs - critical for reliable infrared receiver demodulation. |
| Exposed CIN− terminal | Allows full flexibility in threshold setting - supports programmable trip points via external DAC or resistor ladder. |
| Rail-to-rail I/O with wide common-mode range | Permits direct interface with 0–5V sensors and logic without external biasing or level translation. |
| 340µA supply current at 5V | Reduces power budget in always-on sensor nodes - e.g., keyless entry wake-up circuits. |
Applications
| Photodiode Preamp | Zero-Crossing Detector |
|---|---|
|
Use Scenario: Amplifying weak current from ambient light or pulse oximetry photodiodes into clean voltage for ADC sampling. IC Role / Device Role / Timing Role: Op amp configured as transimpedance amplifier (TIA) with gain ≥10V/V; comparator monitors TIA output for event-triggered sampling. Use Value: 8MHz GBW and 6.0V/µs slew rate preserve signal integrity of fast optical pulses; 340µA current enables multi-channel battery-powered designs. |
Use Scenario: Detecting AC line zero crossings in smart energy meters or motor controllers using resistive-divider-scaled mains voltage. IC Role / Device Role / Timing Role: Comparator compares scaled AC waveform against ground (CIN− = VSS) with built-in hysteresis to reject noise near zero. Use Value: ±2mV hysteresis prevents chatter on slow-moving zero-crossings; rail-to-rail output directly drives microcontroller interrupt pins. |
| Smart Card Reader Interface | Infrared Receiver Front-End |
|
Use Scenario: Conditioning ISO 7816-3 card clock and data signals in portable payment terminals. IC Role / Device Role / Timing Role: Op amp buffers and levels card CLK; comparator detects card presence via voltage threshold on I/O line. Use Value: Ground-sensing inputs accept card voltages referenced to VSS; 185ns comparator delay ensures accurate bit timing at 5MHz card rates. |
Use Scenario: Demodulating 30–56kHz carrier-modulated IR signals from remote controls in consumer electronics. IC Role / Device Role / Timing Role: Op amp amplifies filtered IR detector output; comparator converts analog envelope to clean digital pulse train. Use Value: 8MHz op amp bandwidth preserves envelope fidelity; comparator's low input bias (<8nA) avoids loading high-Z detector outputs. |
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). | Requires no external reference; less flexible threshold control due to fixed internal reference tied to CIN−. | Select MAX9002ESA+ if a stable, factory-trimmed reference suffices and board space for external components must be minimized. |
| TLV3604IDR | Single 180ns comparator only (no op amp or reference); 1.8V–5.5V supply; 40µA supply current; open-drain output. | Lacks integrated amplification and reference - requires separate op amp and reference ICs for full signal chain. | Select TLV3604IDR only when comparator-only function is needed and ultra-low power (<50µA) is prioritized over integration. |
Compared with MAX9002ESA+, MAX9005ESA+ trades internal reference convenience for external threshold flexibility and identical op amp/comparator performance; versus TLV3604IDR, it delivers full analog signal conditioning in one SO-8 package at higher current cost but with significant BOM and layout simplification.
Availability
MAX9005ESA+ is available at Aetrix Electronics and suitable for photodiode preamplifiers, zero-crossing detectors, and smart card reader interfaces requiring stable component supply, consistent parametric performance across temperature, and long-term industrial availability.
Supply support for MAX9005ESA+ 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, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX9000–MAX9005 family was designed to integrate precision op amps, fast comparators, and references into minimal-footprint packages for space- and power-constrained portable and sensor systems.
FAQ
What is the maximum closed-loop gain supported by the op amp in MAX9005ESA+?
The op amp in MAX9005ESA+ is decompensated and stable only for closed-loop gains of +10V/V or greater. Attempting unity-gain or gains below 10V/V may cause instability or oscillation. This design enables its 8MHz gain-bandwidth product and 6.0V/µs slew rate - making MAX9005ESA+ optimal for high-gain, high-speed signal conditioning tasks like photodiode transimpedance amplification.
Does MAX9005ESA+ include an internal voltage reference?
No, MAX9005ESA+ does not include an internal voltage reference. Unlike MAX9000/MAX9001/MAX9003/MAX9004, the MAX9005ESA+ exposes the comparator's inverting input (CIN−) externally to allow user-defined threshold sources - such as external DACs, resistor dividers, or precision references - giving full flexibility in trip-point selection without reference-related tempco or load-regulation limitations.
What is the typical supply current of MAX9005ESA+ at 3.3V operation?
At +3.3V supply and +25°C, the typical supply current of MAX9005ESA+ is 375µA, per the Electrical Characteristics table. This value remains stable across temperature (±10% variation from −40°C to +85°C) and scales linearly with supply voltage - enabling accurate power budgeting in 3.3V battery-powered systems like portable IR receivers and smart card terminals.
Can the comparator output of MAX9005ESA+ drive a 10kΩ load directly?
Yes, the comparator output (COUT) of MAX9005ESA+ can drive a 10kΩ load directly while maintaining rail-to-rail swing (VOL < 10mV, VOH > VDD −10mV at 5V). Its ±4.0mA output drive capability ensures full logic-level compatibility with 3.3V/5V microcontrollers and FPGAs - eliminating need for external pull-ups or buffer stages in zero-crossing or event-detection applications.
Is MAX9005ESA+ pin-compatible with other devices in the MAX9000 family?
MAX9005ESA+ shares the same 8-pin SO package and pinout as MAX9000ESA+, MAX9002ESA+, and MAX9003ESA+, including identical VDD, VSS, AIN+, AIN−, AOUT, CIN+, CIN−, and COUT assignments. However, functional differences exist: MAX9000/MAX9003 include internal reference (tied to CIN−), while MAX9005ESA+ leaves CIN− fully external - requiring careful schematic review before drop-in replacement.
MAX9005ESA+ 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
- Applications:
- Smart Card
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
MAX9005ESA+ FAQ
1.How can I place an order for MAX9005ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9005ESA+ 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+ reliable?
The price and inventory of MAX9005ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9005ESA+ is usually 5 days.
3.What payment methods are accepted for MAX9005ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9005ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9005ESA+?
MAX9005ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9005ESA+ 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+?
For technical support, including MAX9005ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9005ESA+ requirements.
6.How does Aetrix verify that MAX9005ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX9005ESA+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX9005ESA+?
All MAX9005ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9005ESA+, 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+ part is unused and in its original packaging.
Return procedure for MAX9005ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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