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Analog Devices Inc./Maxim Integrated MAX4275AKESA
- Part No.:
- MAX4275AKESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4275AKESA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,503
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Product details
Overview
MAX4275AKESA from Maxim Integrated is a single-channel, rail-to-rail output, fixed-gain amplifier with internal VCC/2 biasing at the noninverting input, optimized for single-supply AC-coupled applications. It delivers +5V/V noninverting gain with 0.1% gain accuracy, operates from +2.5V to +5.5V, consumes only 355µA (typ), and features ±17V input fault protection. It is used in portable instruments and smart-card readers where compact size and simplified biasing are critical.
For engineers reviewing the MAX4275AKESA datasheet, MAX4275AKESA pinout, MAX4275AKESA application, or MAX4275AKESA equivalent, key selection criteria include its factory-trimmed gain-setting resistors, internal mid-supply bias eliminating external components, rail-to-rail output swing into 1kΩ, stability with up to 470pF capacitive load, and guaranteed −40°C to +85°C operation in SOT23-5 package.
Technical Context
The MAX4275AKESA integrates a precision rail-to-rail op amp core with laser-trimmed on-chip feedback resistors (RF/RG) and dual 150kΩ resistors forming an internal VCC/2 bias network at IN+. Its compensation is optimized specifically for +5V/V gain, delivering 330kHz −3dB bandwidth and 23MHz GBW product.
This variant belongs to the MAX4275 series-dual version of the MAX4175-and shares identical electrical specifications, pinout, and internal architecture. Unlike open-loop MAX428x devices, it is not unity-gain stable but is decompensated for higher closed-loop bandwidth at fixed gain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Configuration | +5V/V noninverting, fixed and factory-trimmed - eliminates external resistor selection and layout error. |
| Supply Voltage Range | +2.5V to +5.5V single supply - supports Li-ion, USB, and low-voltage embedded rails without level shifting. |
| Supply Current | 355µA (typ) at VCC = 5V - enables battery-powered operation with multi-year runtime in low-duty-cycle systems. |
| Input Fault Protection | ±17V at IN+ or IN− - prevents latch-up or damage when interfacing with noisy or overvoltage-prone sensors. |
| Capacitive Load Stability | Stable with up to 470pF - drives ADC input filters, long traces, or RF front-end coupling caps without isolation resistor. |
| Output Voltage Swing | Rail-to-rail into 1kΩ load (VEE + 25mV to VCC − 25mV) - maximizes dynamic range in single-supply signal chains. |
| Gain Accuracy | ±0.1% (RF/RG ratio) - ensures consistent signal scaling across production batches without calibration. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin environments. |
Pinout & Package
SOT23-5 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, JEDEC MO-178AC compliant, thermal pad optional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN− | Inverting input terminal | Connected internally to RG; accepts DC- or AC-coupled signals; limited to VEE–0.3V to VCC+0.3V for safe operation. |
| 2 - IN+ | Noninverting input terminal | Biased internally to VCC/2 via dual 150kΩ resistors; requires 0.1µF bypass to ground for PSRR optimization. |
| 3 - VEE | Negative supply / ground reference | Typically connected to system ground in single-supply designs; must be ≤ 0.3V below IN−/IN+ common-mode limits. |
| 4 - VCC | Positive supply input | Accepts +2.5V to +5.5V; requires local 0.1µF ceramic bypass capacitor to VEE for noise suppression. |
| 5 - OUT | Amplifier output | Rail-to-rail capable; drives 1kΩ load while maintaining <2mV offset; stable with ≤470pF capacitive load. |
Key Features
| Feature | Design Value |
|---|---|
| Internal VCC/2 bias network | Eliminates two external bias resistors and reduces PCB area by >2mm² in AC-coupled sensor interfaces. |
| Laser-trimmed RF/RG resistors | 0.1% gain tolerance ensures consistent signal chain gain without per-unit calibration in production test. |
| ±17V input fault tolerance | Enables direct connection to unconditioned transducer outputs (e.g., thermocouples, piezoelectric sensors) without external clamping. |
| Rail-to-rail output stage | Delivers full-scale swing from 25mV above VEE to 25mV below VCC, maximizing SNR in 10-bit+ ADC front ends. |
| 470pF capacitive load stability | Supports direct driving of anti-aliasing filters or long PCB traces without adding series resistance that degrades settling time. |
| Low 355µA quiescent current | Permits integration into always-on monitoring nodes (e.g., smart-meter tamper detection, wearable biosensors). |
Applications
| Portable Instrument Signal Conditioning | Smart-Card Reader Analog Front End |
|---|---|
|
Use Scenario: Amplifying low-level analog outputs from MEMS accelerometers or temperature sensors in handheld multimeters or field testers. IC Role / Device Role / Timing Role: Fixed-gain noninverting amplifier with internal VCC/2 bias, providing DC-stable gain and rail-to-rail output swing. Use Value: Reduces BOM count by removing external bias resistors and improves gain consistency across units without trimming. |
Use Scenario: Conditioning card-detect or contact-voltage signals in ISO 7816-compliant smart-card readers. IC Role / Device Role / Timing Role: Single-supply AC-coupled amplifier with high input fault tolerance for robust interface to card insertion events. Use Value: Withstands ±17V transients during hot-plug events and maintains signal integrity through full temperature range. |
| Infrared Remote Control Receiver | Low-Side Current-Sense Amplifier |
|
Use Scenario: Amplifying weak, modulated IR photodiode currents in TV remote receivers or proximity sensors. IC Role / Device Role / Timing Role: Low-noise, fixed-gain preamplifier with 90nV/√Hz input voltage noise and fast 7µs settling to 0.01%. Use Value: Enables reliable demodulation of 38kHz carrier signals with minimal added jitter or distortion. |
Use Scenario: Amplifying mV-level shunt voltage in battery-powered IoT node power management circuits. IC Role / Device Role / Timing Role: Precision gain block with 0.1% accuracy and rail-to-rail output for accurate current measurement into ADC. Use Value: Delivers sub-1% total measurement error over temperature without calibration, reducing firmware overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4175AKESA | Same +5V/V gain, identical pinout and specs, but single-channel version of MAX4175 family (not dual); same SOT23-5 package. | Designed for space-constrained single-channel systems; lacks dual-channel redundancy or channel matching. | Select MAX4175AKESA when only one amplifier channel is required and board real estate is premium. |
| MAX4274AKESA | Same package and supply specs, but lacks internal VCC/2 bias; requires external bias network for single-supply use. | Suitable for DC-coupled or dual-supply applications where IN+ biasing is controlled externally. | Choose MAX4274AKESA when precise DC offset control or dual-supply operation is needed, and external biasing is acceptable. |
Compared with MAX4175AKESA, the MAX4275AKESA offers identical performance in a dual-channel configuration, enabling matched gain paths in differential or redundant sensing. Compared with MAX4274AKESA, it eliminates two external resistors and associated layout complexity for AC-coupled single-supply designs.
Availability
MAX4275AKESA is available at Aetrix Electronics and suitable for portable instrumentation, smart-card readers, and infrared receiver designs requiring stable component supply, guaranteed −40°C to +85°C operation, and long-term industrial lifecycle support.
Supply support for MAX4275AKESA 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 MAX4275 belongs to Maxim's GainAmp™ fixed-gain amplifier product line, designed to replace discrete op-amp-plus-resistor configurations with integrated, precision, low-power solutions for space- and cost-sensitive signal conditioning.
FAQ
What is the exact gain value and configuration of the MAX4275AKESA?
The MAX4275AKESA is configured for noninverting +5V/V fixed gain using factory-laser-trimmed internal resistors. This gain is specified and tested across the full −40°C to +85°C operating range with ±0.1% accuracy. The device does not support inverting or adjustable gain modes; its topology is hardwired for this specific noninverting transfer function.
Does the MAX4275AKESA require external biasing components for single-supply operation?
No. The MAX4275AKESA includes internal 150kΩ/150kΩ resistors that bias the IN+ pin to VCC/2, eliminating the need for external resistors in AC-coupled single-supply applications. A 0.1µF bypass capacitor from IN+ to VEE is recommended to suppress high-frequency supply noise, but no DC bias network is required.
What is the maximum capacitive load the MAX4275AKESA can drive without oscillation?
The MAX4275AKESA is stable with capacitive loads up to 470pF when driving a 100kΩ load, as verified in the datasheet's Typical Operating Characteristics. No isolation resistor is needed within this limit. For loads exceeding 470pF, a series isolation resistor (e.g., 100Ω) between OUT and the load restores phase margin and prevents peaking or oscillation.
Can the MAX4275AKESA be used in dual-supply configurations?
Yes. The MAX4275AKESA operates from ±1.25V to ±2.75V dual supplies. However, its internal VCC/2 bias network is referenced to the positive rail, so in dual-supply use, VEE must be connected to the negative rail and the IN+ bias point becomes VCC/2 relative to that rail - requiring careful interpretation of common-mode ranges and potential external bias adjustment for symmetric operation.
What package type and footprint does the MAX4275AKESA use?
The MAX4275AKESA is supplied in a 5-pin SOT23-5 package (JEDEC MO-178AC), measuring 2.9mm × 1.6mm × 1.1mm with gull-wing leads. It uses standard SOT23 land patterns and is compatible with reflow soldering. The package has no exposed thermal pad, and pin 1 is marked by a dot or notch on the top surface.
MAX4275AKESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- GainAmp™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.7V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- 970 kHz
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 355µA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4275AKESA FAQ
1.How can I place an order for MAX4275AKESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4275AKESA 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 MAX4275AKESA reliable?
The price and inventory of MAX4275AKESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4275AKESA is usually 5 days.
3.What payment methods are accepted for MAX4275AKESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4275AKESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4275AKESA?
MAX4275AKESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4275AKESA 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 MAX4275AKESA?
For technical support, including MAX4275AKESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4275AKESA requirements.
6.How does Aetrix verify that MAX4275AKESA is sourced from the original manufacturer or authorized distributors?
All MAX4275AKESA 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 MAX4275AKESA meets industry standards.
7.What is the process for return or replacement of MAX4275AKESA?
All MAX4275AKESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4275AKESA, 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 MAX4275AKESA part is unused and in its original packaging.
Return procedure for MAX4275AKESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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