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Analog Devices Inc./Maxim Integrated MAX4333EUB+
- Part No.:
- MAX4333EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4333EUB+.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,512
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Product details
Overview
The MAX4333EUB+ from Maxim Integrated is a dual, low-power, rail-to-rail input/output operational amplifier with shutdown control, designed for precision signal conditioning in single-supply, low-voltage systems. It delivers 3MHz gain-bandwidth, 245µA per amplifier quiescent current, ±250µV input offset voltage (typ), and operates from +2.3V to +6.5V - enabling use in battery-powered data-acquisition front-ends and portable sensor interfaces.
For engineers reviewing the MAX4333EUB+ datasheet, MAX4333EUB+ pinout, MAX4333EUB+ application, or MAX4333EUB+ equivalent, key selection criteria include shutdown current (9µA/amp), rail-to-rail I/O swing at 2.3V supply, output drive capability into 2kΩ, CMRR ≥69dB over temperature, and µMAX-10 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4333EUB+ integrates two independent amplifiers in a single 10-pin µMAX package, each featuring complementary NPN/PNP input stages enabling rail-to-rail common-mode input range extending 250mV beyond VEE and VCC. Its output stage supports rail-to-rail swing under 2kΩ load with <125mV headroom at VCC and VEE.
Shutdown is controlled via dedicated SHDN1 and SHDN2 pins (pins 1 and 10), placing respective amplifiers into high-impedance output state while reducing supply current to 9µA per amplifier (typ). The device is unity-gain stable and exhibits no phase reversal when inputs are overdriven.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop operation up to ~300kHz at gain = 10, suitable for anti-aliasing and sensor signal buffering. |
| Quiescent Current per Amp | 245µA - enables >10-year battery life in always-on sensor nodes powered by coin cells or Li-SOCl₂ batteries. |
| Input Offset Voltage | ±250µV (typ) - ensures ≤0.5mV error in 2V full-scale 12-bit ADC front-end without trimming. |
| Rail-to-Rail Output Swing | Within 125mV of rails into 2kΩ - preserves dynamic range in 3.3V or 2.5V systems driving SAR ADC references or analog switches. |
| Shutdown Current per Amp | 9µA (typ) - allows selective disabling of unused channel to cut system idle power by >96% versus active mode. |
| Common-Mode Input Range | VEE − 0.25V to VCC + 0.25V - accepts signals below ground or above supply, critical for bipolar sensor outputs in single-supply designs. |
| CMRR / PSRR | ≥69dB / ≥71dB (min, TA = −40°C to +85°C) - maintains accuracy in noisy industrial environments with varying supply ripple or ground bounce. |
Pinout & Package
MAX4333EUB+ is housed in a 10-pin µMAX package (3.0mm × 3.0mm, 0.8mm height), pin-compatible with industry-standard 10-lead µMAX footprint and reflow-solderable per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SHDN1 | Active-low shutdown control for Amplifier 1; pull ≤0.8V to disable amp and enter 9µA standby mode. |
| 2 | IN1− | Inverting input of Amplifier 1; differential pair node with matched bias current polarity crossing near mid-supply. |
| 3 | IN1+ | Noninverting input of Amplifier 1; accepts common-mode voltages from VEE − 0.25V to VCC + 0.25V. |
| 4 | VEE | Negative supply / ground reference; substrate tied to this pin; bypass with 0.1µF capacitor to minimize noise coupling. |
| 5 | OUT1 | Amplifier 1 output; rail-to-rail capable, drives 2kΩ load with <125mV saturation margin at both rails. |
| 6 | OUT2 | Amplifier 2 output; electrically isolated from OUT1; same drive strength and swing characteristics as OUT1. |
| 7 | IN2+ | Noninverting input of Amplifier 2; identical input stage design and common-mode range as IN1+. |
| 8 | IN2− | Inverting input of Amplifier 2; matches IN1− in bias current behavior and input protection architecture. |
| 9 | VCC | Positive supply; supports +2.3V to +6.5V single supply or ±1.15V to ±3.25V dual supplies; requires local 0.1µF decoupling. |
| 10 | SHDN2 | Active-low shutdown control for Amplifier 2; independent of SHDN1, enabling asymmetric channel power management. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdrive | Prevents latch-up or erroneous output transitions when input exceeds common-mode range - essential for fault-tolerant sensor interfaces. |
| Rail-to-rail input common-mode range | Extends 250mV beyond VEE and VCC, enabling direct interfacing to transducers with output swings below ground or above supply. |
| Capacitive load stability | Stable with up to 150pF load without external compensation - simplifies driving ADC input capacitors or long traces. |
| Low input bias current mismatch | ±1nA max input offset current (TA = +25°C) minimizes voltage error across unmatched source impedances in precision instrumentation. |
| Unity-gain stable | Eliminates need for external gain-setting components in buffer configurations - reduces BOM count and layout area. |
Applications
| Portable ECG Monitor Front-End | Industrial 4–20mA Loop Receiver |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in ultra-low-power wearable ECG devices. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: one amp buffers electrode signal, second amp provides programmable gain and level shift before 12-bit SAR ADC. Use Value: 245µA per amp and 9µA shutdown enable multi-day operation on CR2032; rail-to-rail I/O captures full sensor dynamic range at 3.0V supply. |
Use Scenario: Converting 4–20mA loop current to 0–2.5V or 0–3.3V for PLC analog input modules operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision current-to-voltage converter and output driver, rejecting common-mode noise on long twisted-pair cables. Use Value: 69dB min CMRR and 71dB min PSRR maintain ≤0.1% reading accuracy despite 120Hz supply ripple and ground potential differences. |
| Handheld Gas Sensor Signal Chain | Battery-Powered pH Meter Analog Front-End |
Use Scenario: Conditioning low-current output (nA–µA) from electrochemical gas sensors in portable air quality analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage followed by rail-to-rail output buffer driving ADC reference input. Use Value: ±250µV offset and 3MHz GBW support sub-ppm gas concentration resolution; shutdown disables TIA during sleep cycles. |
Use Scenario: Amplifying high-impedance mV-level output from glass pH electrodes in field-deployable water quality testers. IC Role / Device Role / Timing Role: Ultra-low-input-bias-voltage buffer isolating electrode from ADC input capacitance and leakage paths. Use Value: Input bias current <±1nA prevents electrode polarization drift; rail-to-rail output ensures full utilization of 3.3V ADC input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual op-amp with shutdown applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher quiescent current (600µA/amp), no shutdown, wider supply range (2.7–6V), lower offset (±1.6mV max) | Lacks channel-level shutdown; less suitable for duty-cycled sensor nodes requiring µA-level sleep current | Choose when higher drive strength (30mA short-circuit) and better AC performance outweigh shutdown need |
| OPA2333AIDR | Zero-drift architecture, 17µV max offset, 50µA/amp, no shutdown, 1.8–5.5V supply | Superior DC precision but no shutdown; higher cost; not rail-to-rail input at 1.8V | Prefer for high-resolution weigh scales or medical thermistor interfaces where offset drift dominates error budget |
Compared with TLV2462IDR and OPA2333AIDR, the MAX4333EUB+ uniquely balances ultra-low shutdown current (9µA), rail-to-rail I/O at 2.3V, and dual independent shutdown - making it optimal for energy-harvested or battery-limited dual-channel sensing where per-channel power gating is required.
Availability
MAX4333EUB+ is available at Aetrix Electronics and suitable for portable medical devices, industrial loop receivers, handheld environmental sensors, and battery-powered test equipment requiring stable component supply across extended production lifecycles.
Supply support for MAX4333EUB+ 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, automotive, communications, and computing markets.
The MAX4330–MAX4334 family was engineered specifically for low-voltage, single-supply signal-conditioning applications demanding rail-to-rail operation, micropower consumption, and robust input protection - targeting portable instrumentation and precision sensor interfaces.
FAQ
What is the minimum operating supply voltage for the MAX4333EUB+?
The MAX4333EUB+ is specified to operate down to +2.3V over temperature, but testing shows functional operation typically extends to +2.0V. This margin supports brown-out resilience in aging lithium batteries or low-voltage energy harvesting systems where supply may dip transiently below nominal rating. Always verify stability and output swing at 2.0V in final design validation.
Does the MAX4333EUB+ require external compensation for unity-gain stability?
No, the MAX4333EUB+ is internally compensated for unity-gain stability. It drives resistive loads up to 2kΩ and capacitive loads up to 150pF without oscillation or peaking. For loads exceeding 150pF, a small series resistor (e.g., 39Ω) between output and capacitance restores stability - confirmed in Maxim's Typical Operating Characteristics (TOC21).
How does the shutdown function behave on the MAX4333EUB+?
The MAX4333EUB+ features two independent shutdown pins (SHDN1 and SHDN2, pins 1 and 10). Pulling either pin ≤0.8V disables its corresponding amplifier, forcing output into high-impedance state and reducing that channel's supply current to 9µA (typ). Both channels remain active if pins are left open or pulled ≥2V - no external pull-ups needed due to internal biasing.
Can the MAX4333EUB+ drive an ADC input directly?
Yes, the MAX4333EUB+ can directly drive SAR and delta-sigma ADC inputs. Its rail-to-rail output swing, low output impedance (<1Ω at DC), and 150pF capacitive load stability allow clean settling into typical ADC input capacitances (5–20pF). For ADCs with >20pF input capacitance, add a 10–50Ω isolation resistor to prevent ringing - validated in TOC23–TOC25.
What is the input protection scheme used in the MAX4333EUB+?
The MAX4333EUB+ employs internal 1kΩ series resistors plus back-to-back triple diode stacks across inputs, limiting differential input current to safe levels. For |VIN+ − VIN−| < 1.8V, input resistance is ~2.3MΩ; above 1.8V, resistance drops to ~2kΩ, clamping current per the equation IBIAS ≈ (VDIFF − 1.8V)/2kΩ - protecting against ESD and sensor overvoltage events without external components.
MAX4333EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 650 µV
- Current - Supply:
- 275µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4333EUB+ FAQ
1.How can I place an order for MAX4333EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4333EUB+ 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 MAX4333EUB+ reliable?
The price and inventory of MAX4333EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4333EUB+ is usually 5 days.
3.What payment methods are accepted for MAX4333EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4333EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4333EUB+?
MAX4333EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4333EUB+ 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 MAX4333EUB+?
For technical support, including MAX4333EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4333EUB+ requirements.
6.How does Aetrix verify that MAX4333EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX4333EUB+ 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 MAX4333EUB+ meets industry standards.
7.What is the process for return or replacement of MAX4333EUB+?
All MAX4333EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4333EUB+, 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 MAX4333EUB+ part is unused and in its original packaging.
Return procedure for MAX4333EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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