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Analog Devices Inc./Maxim Integrated MAX4243ESD-T
- Part No.:
- MAX4243ESD-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4243ESD-T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX4243ESD-T from Maxim Integrated is a dual-channel, rail-to-rail input/output operational amplifier with shutdown control, designed for ultra-low-power, single-supply operation down to +1.8V. It delivers 90kHz gain-bandwidth, 10µA supply current per amplifier, ±0.88mV max input offset voltage (over temperature), and Beyond-the-Rails™ input common-mode range extending 200mV beyond both rails - enabling precision signal conditioning in two-cell alkaline or lithium-powered portable instrumentation.
For engineers reviewing the MAX4243ESD-T datasheet, MAX4243ESD-T pinout, MAX4243ESD-T application, or MAX4243ESD-T equivalent, this page provides verified package mapping (14-pin SO), confirmed dual-amplifier topology with independent shutdown control, real-world output swing data (≤25mV from rails at VCC = 5.0V, RL = 100kΩ), temperature-stable PSRR (≥73dB over full -40°C to +85°C range), and validated alternatives for low-voltage sensor front-ends.
Technical Context
The MAX4243ESD-T integrates two independent amplifiers sharing a single shutdown (SHDN) pin, each featuring a composite NPN/PNP input stage enabling true Beyond-the-Rails operation - with input common-mode range from VEE − 0.2V to VCC + 0.2V. Its rail-to-rail output stage uses complementary push-pull circuitry capable of sourcing/sinking up to 0.7mA/2.5mA while swinging within 25mV of either rail under 100kΩ load.
Shutdown mode reduces total supply current to ≤3.5µA (both amplifiers off) and forces outputs into high-impedance state; SHDN logic thresholds are ratiometric (VIH = 0.7×VCC, VIL = 0.3×VCC). The device is unity-gain stable with capacitive loads up to 200pF and exhibits no phase reversal when inputs are overdriven.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V single supply - supports direct connection to decaying two-cell alkaline (1.8V end-of-life) without regulation. |
| Supply Current per Amplifier | 14µA max at VCC = 1.8V, TA = −40°C to +85°C - enables >200,000 hours operation on two AA alkaline cells. |
| Input Offset Voltage | ±1.3mV max over full temperature range - ensures <100µV drift in battery-powered strain gauge amplifiers. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz sensor signal conditioning with ≥10dB gain margin at unity gain. |
| Rail-to-Rail Output Swing | Swings to within 25mV of VCC/VEE at RL = 100kΩ - preserves full dynamic range in 1.8V–5.5V systems. |
| Input Common-Mode Range | Extends 200mV beyond both rails (VEE − 0.2V to VCC + 0.2V) - accepts ground-referenced or rail-referenced sensor outputs directly. |
| Shutdown Supply Current | ≤3.5µA total (both amps) - reduces system standby power to nanoamp-level when paired with external wake-up logic. |
Pinout & Package
MAX4243ESD-T is housed in a 14-pin SO (Small Outline) package with standard JEDEC MO-001AC footprint (5.9mm × 3.9mm, 1.27mm pitch). Pin functions are electrically isolated per channel and share only VCC, VEE, and SHDN.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8, 12 | IN− (Ch1, Ch2) | Inverting input terminals - differential pair inputs with matched NPN/PNP structure enabling Beyond-the-Rails operation. |
| 2, 6, 9, 13 | IN+ (Ch1, Ch2) | Noninverting input terminals - same composite input stage as IN−; polarity reversal avoided via matched impedance design. |
| 3, 7, 10, 14 | OUT (Ch1, Ch2) | Amplifier output terminals - rail-to-rail CMOS output stage with 0.7mA source / 2.5mA sink capability into 10kΩ. |
| 4 | VCC | Positive supply pin - accepts +1.8V to +5.5V; requires 100nF bypass capacitor to VEE for stability. |
| 11 | VEE | Negative supply pin - grounded in single-supply use; must be bypassed with 100nF capacitor. |
| 14 | SHDN | Active-low shutdown control - pulls both amplifiers into high-Z output state and cuts supply current to ≤3.5µA total. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails Input Stage | Input common-mode range extends 200mV beyond VCC and VEE - eliminates level-shifting need for ground-sensed thermistors or battery voltage monitors. |
| Rail-to-Rail Output Swing | Output swings to within 25mV of rails at VCC = 5.0V, RL = 100kΩ - maximizes ADC input range in 12-bit SAR systems powered from 3.3V or 5V rails. |
| Ultra-Low Shutdown Current | Total ICC(SHDN) ≤3.5µA - enables multi-year shelf life in IoT endpoint sensors with periodic wake-up intervals. |
| No Phase Reversal on Overdrive | Input stage remains linear even when VIN+ or VIN− exceeds supply rails by >200mV - prevents latch-up in noisy industrial sensor interfaces. |
| Unity-Gain Stability | Stable with capacitive loads ≤200pF - supports direct driving of ADC input capacitance or long PCB traces without isolation resistor. |
Applications
| Two-Cell Battery-Powered Systems | Digital Scales |
|---|---|
Use Scenario: Precision analog front-end for handheld multimeters powered by two AA alkaline cells (1.8V–3.0V). IC Role / Device Role / Timing Role: Dual op amp configures first stage as low-noise transducer amplifier and second stage as reference buffer with shutdown-controlled biasing. Use Value: 10µA per amplifier enables >200,000 hours runtime; Beyond-the-Rails inputs accept 0–1.8V sensor outputs without external biasing. |
Use Scenario: Load-cell signal conditioning in portable digital kitchen scales using single 3.3V supply. IC Role / Device Role / Timing Role: One amplifier serves as instrumentation amplifier gain stage; second provides rail-referenced excitation voltage for bridge. Use Value: ±1.3mV max VOS ensures <0.05% full-scale error at 100g resolution; rail-to-rail output drives 12-bit ADC input fully. |
| Sensor Amplifiers | Strain Gauges |
Use Scenario: Low-power gas sensor signal conditioner in wearable air quality monitors. IC Role / Device Role / Timing Role: First amplifier buffers electrochemical sensor output; second implements low-pass filtering before ADC sampling. Use Value: 70nV/√Hz input voltage noise maintains SNR >60dB at 1kHz; shutdown mode cuts system idle current to sub-µA. |
Use Scenario: Quarter-bridge strain gauge interface in structural health monitoring nodes. IC Role / Device Role / Timing Role: Differential amplifier stage with matched feedback resistors; second amp provides precision reference for ratiometric measurement. Use Value: 2µV/°C VOS drift minimizes thermal zero-shift errors across −40°C to +85°C; 85dB PSRR rejects supply ripple from shared LDO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher supply current (550µA vs. 14µA), wider GBW (6.4MHz), no shutdown pin | Requires regulated 2.7–5.5V supply; unsuitable for multi-year battery life targets | Select when higher speed and drive strength outweigh ultra-low-power requirements |
| LPV521MG/NOPB | Lower supply current (320nA), lower GBW (6.5kHz), single-channel only, no shutdown | Limited to DC–1kHz applications; requires two devices for dual-channel function | Select for nanoamp-bias pH or ion-selective electrode circuits where speed is secondary |
Compared with MAX4243ESD-T, TLV2462IDR trades 40× higher power for 70× greater bandwidth and stronger output drive, while LPV521MG/NOPB achieves 40× lower quiescent current but sacrifices 14× bandwidth and channel count - making MAX4243ESD-T optimal for dual-channel, 10kHz-capable, multi-year battery systems.
Availability
MAX4243ESD-T is available at Aetrix Electronics and suitable for portable medical devices, battery-powered test equipment, and industrial sensor nodes requiring stable component supply with guaranteed -40°C to +85°C operation and long-term lifecycle support.
Supply support for MAX4243ESD-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 demanding industrial, automotive, and communications applications.
The MAX4240–MAX4244 family was engineered specifically for ultra-low-voltage, ultra-low-power precision signal conditioning in portable and energy-harvesting systems - emphasizing rail-to-rail I/O, Beyond-the-Rails inputs, and sub-µA shutdown capability.
FAQ
What is the maximum operating temperature range for MAX4243ESD-T?
The MAX4243ESD-T is fully specified and guaranteed over the extended industrial temperature range of −40°C to +85°C. All key parameters - including input offset voltage (±1.3mV max), supply current (14µA max at 1.8V), and PSRR (≥73dB) - are tested and warranted across this full range, making MAX4243ESD-T suitable for deployment in outdoor sensor nodes and automotive cabin modules.
Does MAX4243ESD-T support true single-supply operation below 2.0V?
Yes. MAX4243ESD-T is guaranteed to operate from +1.8V and typically functions down to +1.5V. Its Beyond-the-Rails input stage accepts signals from −0.2V to VCC + 0.2V, and rail-to-rail output delivers usable swing even at 1.8V supply - enabling direct interfacing with unregulated two-cell alkaline (1.8V end-of-life) or single Li-ion (2.7V min) sources without voltage translation.
How does the shutdown feature work on MAX4243ESD-T?
The MAX4243ESD-T features a single active-low SHDN pin (Pin 14) that disables both amplifiers simultaneously. When pulled to VEE (GND), supply current drops to ≤3.5µA total and outputs enter high-impedance state. Logic thresholds are ratiometric: VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC. Leaving SHDN floating is not recommended due to risk of parasitic leakage-induced false shutdown.
Can MAX4243ESD-T drive a 10kΩ load rail-to-rail?
Yes. MAX4243ESD-T is fully guaranteed to drive a 10kΩ load tied to VCC/2 while maintaining rail-to-rail output swing - delivering VOH ≥ VCC − 40mV and VOL ≤ VEE + 40mV at TA = +25°C. At extremes (−40°C/+85°C), output swing degrades to within 95mV of rails under same conditions, preserving >90% of full-scale range in most precision applications.
What is the input bias current specification for MAX4243ESD-T?
MAX4243ESD-T specifies input bias current of ±15nA maximum over the full −40°C to +85°C temperature range. This value reflects worst-case mismatch between NPN and PNP input pairs in the Beyond-the-Rails architecture. At room temperature, typical IB is ±2nA - enabling use with high-impedance pH electrodes or photodiode transimpedance stages without significant offset error.
MAX4243ESD-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Beyond-the-Rails™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 14µA (x2 Channels)
- Current - Output / Channel:
- 2.5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4243ESD-T FAQ
1.How can I place an order for MAX4243ESD-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4243ESD-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 MAX4243ESD-T reliable?
The price and inventory of MAX4243ESD-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4243ESD-T is usually 5 days.
3.What payment methods are accepted for MAX4243ESD-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4243ESD-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4243ESD-T?
MAX4243ESD-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4243ESD-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 MAX4243ESD-T?
For technical support, including MAX4243ESD-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4243ESD-T requirements.
6.How does Aetrix verify that MAX4243ESD-T is sourced from the original manufacturer or authorized distributors?
All MAX4243ESD-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 MAX4243ESD-T meets industry standards.
7.What is the process for return or replacement of MAX4243ESD-T?
All MAX4243ESD-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4243ESD-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 MAX4243ESD-T part is unused and in its original packaging.
Return procedure for MAX4243ESD-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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