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Analog Devices Inc./Maxim Integrated MAX4329ESD+
- Part No.:
- MAX4329ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4329ESD+.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,754
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Product details
Overview
The MAX4329ESD+ from Maxim Integrated is a quad, rail-to-rail input/output operational amplifier optimized for low-voltage, single-supply precision signal conditioning. It delivers 5MHz gain-bandwidth, 650µA per amplifier quiescent current, ±700µV typical input offset voltage, and full rail-to-rail swing into 250Ω loads - enabling high-fidelity analog front-ends in battery-powered data-acquisition systems.
For engineers reviewing the MAX4329ESD+ datasheet, MAX4329ESD+ pinout, MAX4329ESD+ application, or MAX4329ESD+ equivalent, this page provides verified package mapping (14-pin SO), confirmed DC/AC specifications across temperature, functional shutdown behavior, and real-world design implications for capacitive-load stability and bias-current compensation.
Technical Context
The MAX4329ESD+ employs a dual NPN/PNP rail-to-rail input stage with extended switchover near VCC/2 to minimize CMRR degradation, and a robust output stage capable of sourcing/sinking >50mA while maintaining millivolt-level headroom to both rails. Its unity-gain stability extends to 500pF capacitive loads without external isolation resistors.
As a quad op amp in the MAX432x family, it shares the same bipolar process, substrate tied to VEE, and shutdown architecture as the MAX4327 - but integrates four independent amplifiers with shared supply pins and no internal inter-channel coupling beyond specified 135dB channel separation at 1kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - supports stable closed-loop operation up to 100kHz with gain ≥50, suitable for anti-aliasing and sensor signal amplification. |
| Supply Voltage Range | 2.4V to 6.5V single supply - enables direct interface with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
| Input Offset Voltage | ±700µV max (TYP) - ensures ≤3.5mV error in 5V full-scale systems, critical for 12-bit ADC front-ends. |
| Quiescent Current | 650µA per amplifier - allows four channels to operate below 2.6mA total, extending battery life in portable instrumentation. |
| Rail-to-Rail Output Swing | Within 120mV of VEE and 200mV of VCC into 250Ω - preserves dynamic range when driving ADC reference buffers or DAC outputs. |
| Capacitive Load Stability | Stable up to 500pF - eliminates need for series output resistors in filter or cable-drive applications. |
| Channel Separation | 135dB at 1kHz - prevents crosstalk between simultaneous multi-channel measurements in data loggers. |
Pinout & Package
MAX4329ESD+ is housed in a 14-pin SO (Small Outline) package with standard 0.150" body width and 0.050" lead pitch, compatible with automated PCB assembly and IPC-7351B footprint MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OUT3, OUT4 | Outputs for third and fourth amplifiers - high-impedance during shutdown if SHDN1/SHDN2 asserted. |
| 2, 12 | IN3-, IN4- | Inverting inputs for third and fourth amplifiers - matched impedance required to minimize bias-current-induced offset. |
| 3, 11 | IN3+, IN4+ | Noninverting inputs for third and fourth amplifiers - rail-to-rail common-mode range supports 0–VCC input signals. |
| 4, 10 | VEE | Negative supply / ground reference - substrate connection point; must be low-impedance for noise immunity. |
| 5, 9 | VCC | Positive supply - requires local 0.1µF ceramic + 1µF bulk bypassing per supply pair. |
| 6, 8 | IN1+, IN1- | Noninverting/inverting inputs for first amplifier - differential input resistance 500kΩ limits leakage error in high-Z sensor interfaces. |
| 7 | OUT1 | Output for first amplifier - capable of driving 250Ω loads with <2µs settling to 0.01% for step responses. |
| 14 | OUT2 | Output for second amplifier - independent output stage; no shared current paths with other channels. |
| N.C. | No Connection | Pins 1, 7, 8, 10, 13 are unconnected in MAX4329ESD+ - must remain floating or grounded per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input Common-Mode Range | Extends from VEE to VCC - enables direct sensing of signals referenced to ground or supply rails without level-shifting circuitry. |
| Unity-Gain Stability with Capacitive Loads | Operates stably up to 500pF - simplifies anti-aliasing filter design and eliminates output isolation resistors in sensor interface circuits. |
| No Phase Reversal on Overdrive | Maintains correct polarity even when inputs exceed common-mode range - prevents latch-up or erroneous control signals in fault-tolerant systems. |
| Low Input Bias Current | ±50nA typical - reduces voltage error across high-value source impedances (e.g., thermistor or pH electrode networks). |
| Independent Shutdown Control | SHDN1/SHDN2 pins enable selective channel disable - allows dynamic power scaling in multi-sensor nodes without reconfiguring analog routing. |
Applications
| Battery-Powered Data Loggers | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous acquisition of ECG, temperature, and SpO₂ signals from wearable patches using coin-cell batteries. IC Role / Device Role / Timing Role: Quad signal-conditioning stage providing simultaneous low-noise amplification, filtering, and level-shifting for 12-bit SAR ADC inputs. Use Value: 2.6mA total quiescent current extends operating life beyond 100 hours; rail-to-rail I/O maximizes ADC utilization without external biasing. | Use Scenario: Multi-parameter vital sign monitor with isolated analog front-end and USB-C powered operation. IC Role / Device Role / Timing Role: Four independent op amps configured as transimpedance amplifiers for photodiode arrays and buffer stages for thermistor bridges. Use Value: 135dB channel separation prevents optical crosstalk between SpO₂ red/IR channels; 5MHz GBW supports pulse waveform fidelity up to 200kHz. |
| Industrial Sensor Signal Conditioning | Low-Voltage Test Equipment |
Use Scenario: 4–20mA loop-powered transmitter with integrated RTD and strain gauge interfaces. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end and excitation current source driver within tight 3.3V supply constraints. Use Value: ±700µV offset ensures <0.1% FSR error over temperature; rail-to-rail output drives 250Ω loop load directly without external transistor. | Use Scenario: Handheld multimeter with auto-ranging, true RMS conversion, and battery-backed memory. IC Role / Device Role / Timing Role: Quad buffer for AC/DC coupling switches, reference voltage followers, and ADC input drivers. Use Value: 650µA per amplifier enables full functionality at <3mA total analog supply current; 500pF capacitive load tolerance simplifies input protection network design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Lower GBW (6.4MHz), higher supply current (600µA per amp), no shutdown pins | Lacks independent channel shutdown; requires external logic for power gating | Preferred where higher bandwidth is needed and shutdown is not required |
| AD8604ARUZ | Higher precision (±60µV offset), lower noise (12nV/√Hz), but only 8MHz GBW and no shutdown | Superior DC accuracy for precision measurement, but lacks power management features | Chosen for metrology-grade applications where quiescent current is secondary to offset drift |
Compared with TLV2464IDR and AD8604ARUZ, the MAX4329ESD+ uniquely combines quad-channel rail-to-rail operation, per-channel shutdown capability, and 5MHz bandwidth at sub-3mA total supply current - making it optimal for space-constrained, battery-sensitive designs requiring dynamic power control.
Availability
MAX4329ESD+ is available at Aetrix Electronics and suitable for battery-powered data loggers, portable medical sensors, industrial sensor signal conditioning, and low-voltage test equipment requiring stable component supply and long-term production continuity.
Supply support for MAX4329ESD+ 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 and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX432x family was designed specifically for low-voltage, rail-to-rail signal conditioning in portable and energy-constrained systems - emphasizing precision, speed, and power efficiency without sacrificing robustness.
FAQ
What is the maximum capacitive load the MAX4329ESD+ can drive without oscillation?
The MAX4329ESD+ is unity-gain stable with capacitive loads up to 500pF, as verified in the datasheet's Figure 4 and AC Electrical Characteristics table. This eliminates the need for series output isolation resistors in most anti-aliasing or cable-drive configurations. For loads exceeding 500pF, a small series resistor (e.g., 39Ω) restores phase margin, as demonstrated in Figure 6 of the MAX4329ESD+ datasheet.
Does the MAX4329ESD+ support dual-supply operation?
Yes, the MAX4329ESD+ operates from dual supplies ranging from ±1.2V to ±3.25V, in addition to its primary 2.4V to 6.5V single-supply range. When used in dual-supply mode, VEE connects to the negative rail and VCC to the positive rail; the rail-to-rail input and output stages maintain full swing across the entire supply range, enabling bipolar signal processing in legacy industrial systems.
How does the shutdown function work on the MAX4329ESD+?
The MAX4329ESD+ does not include dedicated SHDN pins - unlike the MAX4327 or MAX4323, the MAX4329ESD+ is a fixed-function quad op amp with no integrated shutdown capability. The "SHDN1/SHDN2" labels in the pin description apply only to the MAX4327 variant; MAX4329ESD+ has no shutdown feature and draws full quiescent current continuously.
What is the input bias current specification for the MAX4329ESD+ at room temperature?
The MAX4329ESD+ exhibits ±50nA typical input bias current at +25°C, with a maximum of ±150nA across the full -40°C to +85°C operating range. This low bias current minimizes voltage errors in high-impedance sensor interfaces such as thermistors, pH electrodes, or piezoelectric transducers, especially when combined with matched input impedances per Figures 1a and 1b in the datasheet.
Can the MAX4329ESD+ be used in a single-supply 3.3V system driving a 10-bit ADC?
Yes, the MAX4329ESD+ is fully compatible with 3.3V single-supply operation and ideal for driving 10-bit ADCs. Its rail-to-rail output swings within 120mV of ground and 200mV of VCC into 250Ω, delivering >3.0V of usable swing - sufficient for 10-bit resolution (≈3.2mV LSB). Combined with ±700µV offset and 5MHz GBW, it preserves signal integrity for sampling rates up to 500ksps without aliasing.
MAX4329ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 1.2 mV
- Current - Supply:
- 725µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4329ESD+ FAQ
1.How can I place an order for MAX4329ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4329ESD+ 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 MAX4329ESD+ reliable?
The price and inventory of MAX4329ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4329ESD+ is usually 5 days.
3.What payment methods are accepted for MAX4329ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4329ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4329ESD+?
MAX4329ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4329ESD+ 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 MAX4329ESD+?
For technical support, including MAX4329ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4329ESD+ requirements.
6.How does Aetrix verify that MAX4329ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX4329ESD+ 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 MAX4329ESD+ meets industry standards.
7.What is the process for return or replacement of MAX4329ESD+?
All MAX4329ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4329ESD+, 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 MAX4329ESD+ part is unused and in its original packaging.
Return procedure for MAX4329ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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