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Analog Devices Inc./Maxim Integrated MAX4275BKEUA
- Part No.:
- MAX4275BKEUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
MAX4275BKEUA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,052
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Product details
Overview
MAX4275BKEUA 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 300µA, and features ±17V input fault protection.
For engineers reviewing the MAX4275BKEUA datasheet, MAX4275BKEUA pinout, MAX4275BKEUA application, or MAX4275BKEUA equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts for signal conditioning in portable and low-power systems.
Technical Context
The MAX4275BKEUA integrates a precision rail-to-rail op amp core with laser-trimmed on-chip feedback resistors (RF/RG) and dual 150kΩ internal bias resistors forming a VCC/2 divider at IN+. This eliminates external bias components in AC-coupled designs while maintaining DC accuracy and full output swing.
It is decompensated for its specific +5V/V gain setting, achieving a 3.3MHz –3dB bandwidth and 23MHz GBW product. Input fault protection uses back-to-back SCR structures and diode clamps with current limiting (≤3.5mA at ±17V), preventing phase reversal and protecting both device and source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | +5V/V noninverting, factory-set and laser-trimmed for 0.1% accuracy - eliminates external resistor matching and layout sensitivity. |
| Supply Voltage | +2.5V to +5.5V single supply - supports Li-ion, USB, and regulated 3.3V/5V rails without level-shifting. |
| Supply Current | 300µA typical - enables battery-powered operation for >1 year in low-duty-cycle portable instruments. |
| Input Fault Protection | ±17V at either input - withstands ESD transients and sensor overvoltage without latch-up or damage. |
| Bandwidth | 3.3MHz –3dB (AV = +5V/V) - sufficient for audio-band and fast pulse amplification in smart-card readers. |
| Output Swing | Rail-to-rail into 1kΩ load - delivers full dynamic range across VEE to VCC, maximizing SNR in ADC front-ends. |
| Input Bias | Internal VCC/2 at IN+ via 150kΩ/150kΩ divider - removes need for external bias network in AC-coupled photodiode or IR receiver preamps. |
Pinout & Package
MAX4275BKEUA is housed in a 5-pin SOT23 package (JEDEC MO-178AA), footprint-compatible with standard SOT-23 op amps and suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting input | Connected internally to RG; accepts differential or inverting signal; voltage must stay within supply rails to avoid distortion. |
| 2 (OUT) | Amplifier output | Rail-to-rail capable; drives 1kΩ load with <250mV headroom; stable up to 470pF capacitive load without isolation resistor. |
| 3 (VCC) | Positive supply | Accepts +2.5V to +5.5V; requires 0.1µF bypass capacitor to ground near pin for noise suppression. |
| 4 (VEE) | Negative supply / ground | Typically connected to system ground in single-supply operation; forms reference for internal bias network. |
| 5 (IN+) | Noninverting input | Internally biased to VCC/2 via 150kΩ resistors; ideal for AC-coupled inputs; add 0.1µF capacitor to ground to filter supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated VCC/2 bias network | Eliminates two external resistors and one decoupling capacitor in AC-coupled single-supply designs, reducing BOM count and board area by ~30%. |
| 0.1% gain accuracy (RF/RG) | Factory laser-trimmed resistors ensure consistent gain across temperature and unit-to-unit variation, removing calibration steps in production test. |
| ±17V input fault tolerance | Back-to-back SCR + diode clamp structure limits input current to <3.5mA during overvoltage events, protecting both MAX4275BKEUA and upstream sensors. |
| Rail-to-rail output with 1kΩ drive | Maintains <0.5% THD at 1Vp-p and 10kHz while swinging within 25mV of rails - preserves full ADC input range in 12-bit+ data acquisition. |
| Stable with 470pF capacitive load | No external isolation resistor required when driving ADC input capacitance or long traces, simplifying layout and improving transient response. |
Applications
| Portable Instruments | Smart-Card Readers |
|---|---|
|
Use Scenario: Amplifying low-level analog signals from thermistors, potentiometers, or MEMS sensors in handheld multimeters and environmental monitors. IC Role / Device Role / Timing Role: Fixed-gain signal conditioning stage with internal bias, converting sensor outputs to full-scale ADC input range. Use Value: Eliminates external bias resistors and gain-setting network, reducing component count and enabling compact 2-layer PCB designs. |
Use Scenario: Boosting weak analog pulses from ISO 7816-compliant smart-card contact interfaces before digitization. IC Role / Device Role / Timing Role: Noninverting +5V/V amplifier with rail-to-rail output, preserving pulse edge integrity and amplitude fidelity. Use Value: 3.3MHz bandwidth and <7µs settling time to 0.01% support 5MHz card clock rates without signal degradation. |
| Infrared Receivers | Low-Side Current-Sense |
|
Use Scenario: Amplifying modulated IR detector outputs (e.g., TSOP series) in remote controls and proximity sensors. IC Role / Device Role / Timing Role: AC-coupled preamplifier with VCC/2 bias, rejecting DC offset while preserving 30–56kHz carrier envelope. Use Value: Internal bias and 90nV/√Hz input noise enable >50dB SNR at 38kHz, critical for reliable demodulation in ambient light. |
Use Scenario: Amplifying mV-level shunt voltage in battery-powered IoT nodes monitoring charging/discharging current. IC Role / Device Role / Timing Role: Precision noninverting amplifier with ±17V fault tolerance, interfacing between shunt and SAR ADC. Use Value: 0.1% gain accuracy ensures ±0.1% current measurement error; 300µA quiescent current extends battery life in always-on monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4175BKEUA | +1.25V/V noninverting gain; same VCC/2 bias, package, and supply range; lower bandwidth (1.7MHz). | Better suited for ultra-low-noise DC-coupled sensor buffering where minimal gain error dominates over speed. | Select when gain stability and offset performance outweigh bandwidth requirements - not a drop-in replacement for +5V/V circuits. |
| TLV2782IDR | Unity-gain-stable rail-to-rail op amp (no internal resistors); requires external RF/RG; higher IQ (1.2mA); no ±17V fault protection. | Used where programmable gain or DC-coupled biasing is needed; lacks integrated bias and fault hardening. | Choose only if design flexibility justifies added components, layout complexity, and reduced robustness in field-deployed devices. |
Compared with MAX4175BKEUA and TLV2782IDR, the MAX4275BKEUA uniquely combines factory-set +5V/V gain, internal VCC/2 bias, ±17V fault tolerance, and sub-300µA operation - making it optimal for space-constrained, battery-powered AC-signal chains requiring zero calibration and high reliability.
Availability
MAX4275BKEUA is available at Aetrix Electronics and suitable for portable instruments, smart-card readers, infrared receivers, and low-side current-sense applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MAX4275BKEUA 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 MAX4275BKEUA belongs to the GainAmp™ family of fixed-gain amplifiers, designed specifically to replace discrete op-amp-plus-resistor configurations in space- and power-constrained signal-conditioning circuits.
FAQ
What is the exact gain configuration of the MAX4275BKEUA?
The MAX4275BKEUA is configured for noninverting +5V/V gain using factory-laser-trimmed internal resistors. Its gain is fixed and unchangeable - no external feedback components are required or supported. This value is confirmed in the Gain Selection Guide and electrical characteristics table of the official datasheet (Rev 3, 8/99), where MAX4275BKEUA maps to the +5V/V variant.
Does the MAX4275BKEUA require external biasing resistors for single-supply operation?
No. The MAX4275BKEUA includes internal 150kΩ/150kΩ resistors that generate a precise VCC/2 bias at the IN+ pin, eliminating the need for external bias networks in AC-coupled applications. A 0.1µF capacitor from IN+ to ground is recommended to suppress high-frequency supply noise, but no resistors are required.
What is the maximum capacitive load the MAX4275BKEUA can drive without oscillation?
The MAX4275BKEUA is stable with capacitive loads up to 470pF when driving a 100kΩ load, per the Electrical Characteristics table and Typical Operating Characteristics (Figure 12). No isolation resistor is needed within this limit - making it suitable for direct connection to ADC inputs and moderate-length PCB traces.
Can the MAX4275BKEUA be used in DC-coupled applications?
The MAX4275BKEUA is optimized for AC-coupled use due to its internal VCC/2 bias at IN+. For DC-coupled applications requiring precise input referencing, the MAX4274BKEUA (same package, no internal bias) is the appropriate variant. Using MAX4275BKEUA in DC-coupled mode introduces a fixed VCC/2 offset at the output unless actively nullified.
What does the 'B' in MAX4275BKEUA indicate?
The 'B' suffix in MAX4275BKEUA denotes the +5V/V gain version within the MAX4275 family. Maxim uses letter codes to specify gain: 'A' = +1.25V/V, 'B' = +5V/V, 'C' = +10V/V, etc. This is defined in the Gain Selection Guide (page 10 of the datasheet) and confirmed by ordering information and top-mark correlation.
MAX4275BKEUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- GainAmp™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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:
- 330 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-uMAX-EP|8-uSOP-EP
MAX4275BKEUA FAQ
1.How can I place an order for MAX4275BKEUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4275BKEUA 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 MAX4275BKEUA reliable?
The price and inventory of MAX4275BKEUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4275BKEUA is usually 5 days.
3.What payment methods are accepted for MAX4275BKEUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4275BKEUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4275BKEUA?
MAX4275BKEUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4275BKEUA 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 MAX4275BKEUA?
For technical support, including MAX4275BKEUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4275BKEUA requirements.
6.How does Aetrix verify that MAX4275BKEUA is sourced from the original manufacturer or authorized distributors?
All MAX4275BKEUA 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 MAX4275BKEUA meets industry standards.
7.What is the process for return or replacement of MAX4275BKEUA?
All MAX4275BKEUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4275BKEUA, 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 MAX4275BKEUA part is unused and in its original packaging.
Return procedure for MAX4275BKEUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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