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Analog Devices Inc./Maxim Integrated MAX4323ESA-T
- Part No.:
- MAX4323ESA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4323ESA-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,393
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Product details
Overview
MAX4323ESA-T from Maxim Integrated is a single, rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered signal conditioning. It delivers 5MHz gain-bandwidth, 650µA quiescent current per amplifier, ±700µV offset voltage (typ), and drives 250Ω loads - enabling precision data-acquisition in portable medical sensors and handheld test equipment.
For engineers reviewing the MAX4323ESA-T datasheet, MAX4323ESA-T pinout, MAX4323ESA-T application, or MAX4323ESA-T equivalent, key selection criteria include shutdown capability (25µA), rail-to-rail operation down to 2.4V supply, output swing within 350mV of rails under 500Ω load, and UCSP/SOT23/SO package compatibility across the family.
Technical Context
The MAX4323ESA-T uses a dual-stage bipolar input architecture (NPN + PNP) to achieve rail-to-rail common-mode range (VEE to VCC) without phase reversal on overdrive. Its unity-gain-stable design supports capacitive loads up to 500pF without external compensation.
It features an integrated shutdown control (SHDN pin) that disables the amplifier and places the output in high-impedance state while reducing supply current to 25µA - critical for power-gated sensor front-ends and duty-cycled instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation at ≥1MHz with gain ≥5, suitable for anti-aliasing and active filtering. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - allows continuous operation in coin-cell–powered devices for >1 year at 1kHz sampling. |
| Input Offset Voltage | ±700µV (typ) - ensures ≤3.5mV error in 5V full-scale 12-bit ADC interfaces without trimming. |
| Rail-to-Rail Output Swing | Within 350mV of VCC and VEE at 500Ω load - preserves dynamic range in 3V single-supply systems. |
| Shutdown Supply Current | 25µA - reduces system standby power by >96% versus active mode, enabling µA-level sleep states. |
| Common-Mode Input Range | VEE to VCC - accepts signals from ground to supply in battery-monitoring and current-sense applications. |
| Slew Rate | 2V/µs - supports 100kHz full-power sine waves with <1% distortion at 2VPP. |
Pinout & Package
The MAX4323ESA-T is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (5.0mm × 4.0mm, 1.27mm pitch). Pin 1 is marked with a beveled corner or dot.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives resistive or capacitive loads up to 500pF; high-impedance during shutdown. |
| 2 | IN− | Inverting input - differential pair node; bias current polarity flips near VCC/2 due to NPN/PNP switchover. |
| 3 | IN+ | Noninverting input - matched impedance required with IN− to minimize bias-current-induced offset. |
| 4 | VEE | Negative supply / ground reference - must be bypassed with ≥1µF + 0.1µF ceramic for stability. |
| 5 | N.C. | No internal connection - left unconnected; no routing or thermal relief required. |
| 6 | VCC | Positive supply - operates from 2.4V to 6.5V; requires local 0.1µF ceramic bypass to VEE. |
| 7 | SHDN | Active-low shutdown control - pulled high internally (~1µA); driven low to enter 25µA standby mode. |
| 8 | N.C. | No internal connection - electrically isolated; may be used as thermal pad anchor if grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail I/O | Enables full 0–VCC signal swing in single-supply 2.4V–6.5V systems, maximizing ADC utilization without level-shifting. |
| Low-Power Shutdown | Reduces ICC to 25µA while placing output in high-Z - eliminates loading on downstream stages during sleep. |
| Capacitive-Load Stability | Stable with up to 500pF directly on output - avoids need for isolation resistors in LCD bias or DAC buffer designs. |
| No Phase Reversal | Prevents output latch-up when inputs exceed supply rails - critical for fault-tolerant sensor interfaces. |
| Unity-Gain Stable | Operates reliably at AV = +1 with ≤500pF load - simplifies design of voltage followers and active filters. |
Applications
| Battery-Powered Data Acquisition | Portable Medical Sensors |
|---|---|
Use Scenario: Continuous analog front-end for handheld ECG or pulse oximeter with 3V coin-cell supply. IC Role / Device Role / Timing Role: Signal-conditioning amplifier buffering electrode signals before 12-bit SAR ADC sampling at 1kHz. Use Value: Rail-to-rail input captures full biopotential range (±300mV); 650µA ICC extends battery life beyond 18 months. | Use Scenario: Low-noise amplification of thermistor or RTD outputs in wearable temperature monitors. IC Role / Device Role / Timing Role: Precision gain stage with <700µV offset ensuring ±0.1°C accuracy over 0–50°C. Use Value: 5MHz GBWP supports fast step response to thermal transients; shutdown cuts idle power during Bluetooth sleep cycles. |
| RSSI Signal Conditioning | PA Bias Control Loops |
Use Scenario: Logarithmic amplifier input stage in cellular/WiFi RF receiver RSSI detection circuits. IC Role / Device Role / Timing Role: High-linearity, rail-to-rail op amp converting diode-detected RF envelope to baseband voltage. Use Value: 2V/µs slew rate handles burst-modulated signals; CMRR >62dB rejects supply noise coupling into weak RF paths. | Use Scenario: Closed-loop bias control for Class-AB RF power amplifiers in IoT gateways. IC Role / Device Role / Timing Role: Error amplifier comparing PA collector current sense voltage against reference. Use Value: Output swing within 350mV of rails ensures full 0–5V DAC range drives PA gate; shutdown isolates loop during transmit mute. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar rail-to-rail, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44263ASA+T | Lower 220µA ICC, 3.5MHz GBWP, no shutdown, SO-8 package | Lacks SHDN pin; unsuitable for duty-cycled systems requiring µA standby | Select when ultra-low quiescent current outweighs need for shutdown control and higher bandwidth. |
| TLV9061IDBVR | 6.5MHz GBWP, 500µA ICC, shutdown, SOT-23-6 package | Higher input bias current (±1.5pA vs ±50nA), lower PSRR (90dB vs 100dB) | Choose for higher speed where CMRR/PSRR margin is less critical and board space favors SOT-23. |
Compared with MAX44263ASA+T and TLV9061IDBVR, the MAX4323ESA-T uniquely balances 5MHz bandwidth, 25µA shutdown, and 100dB PSRR in an industry-standard SO-8 footprint - making it optimal for precision, intermittently powered instrumentation where supply rejection and controlled power states are mandatory.
Availability
MAX4323ESA-T is available at Aetrix Electronics and suitable for battery-powered data acquisition, portable medical sensors, RSSI signal conditioning, and PA bias control loops requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for MAX4323ESA-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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX432x family was engineered specifically for low-voltage, rail-to-rail signal conditioning in portable and energy-constrained systems - prioritizing micropower operation, wide supply range, and robust input/output swing without sacrificing bandwidth or DC accuracy.
FAQ
What is the operating supply voltage range for the MAX4323ESA-T?
The MAX4323ESA-T operates from a single supply of 2.4V to 6.5V or dual supplies of ±1.2V to ±3.25V. At 2.4V, it maintains full rail-to-rail input/output swing and 5MHz gain-bandwidth - enabling direct interface with Li-ion, alkaline, or NiMH battery sources without regulation. Its PSRR exceeds 62dB across this entire range, ensuring stable performance despite supply droop.
Does the MAX4323ESA-T support shutdown mode, and how does it behave?
Yes, the MAX4323ESA-T supports active-low shutdown via Pin 7 (SHDN). When pulled ≤0.8V, it reduces supply current to 25µA per amplifier and places the output in high-impedance state - isolating downstream circuitry. The internal ~1µA pullup allows floating SHDN to enable the device. This behavior is confirmed in the datasheet's AC Electrical Characteristics table and Figure 12 transient plots.
What is the maximum capacitive load the MAX4323ESA-T can drive stably?
The MAX4323ESA-T is unity-gain stable with capacitive loads up to 500pF, as verified in Figure 4 (Stable Operating Region) and Figure 5 (transient response with CL = 500pF). Driving >500pF requires an isolation resistor (e.g., 39Ω) in series with the output, per Figure 6. This tolerance eliminates need for external compensation in most DAC buffer and sensor filter applications.
How does the rail-to-rail input stage of the MAX4323ESA-T work, and why does it matter?
The MAX4323ESA-T uses complementary NPN and PNP input stages that switch near VCC/2, extending common-mode range from VEE to VCC without phase reversal. This allows direct sensing of signals referenced to ground or supply - essential for current-sense amplifiers and single-supply sensor interfaces. The switchover region is widened to minimize CMRR degradation, maintaining >62dB rejection across the full range.
What package type and footprint does the MAX4323ESA-T use?
The MAX4323ESA-T uses an 8-pin SO (Small Outline) package conforming to JEDEC MS-012AC outline: 5.0mm × 4.0mm body, 1.27mm lead pitch, and 1.75mm max height. Pin 1 is identified by a beveled corner or dot. This footprint is compatible with standard SO-8 reflow profiles and allows drop-in replacement of other precision op amps like the OP27 or AD8605 in existing layouts.
MAX4323ESA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 725µA
- 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:
- 8-SOIC
MAX4323ESA-T FAQ
1.How can I place an order for MAX4323ESA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4323ESA-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 MAX4323ESA-T reliable?
The price and inventory of MAX4323ESA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4323ESA-T is usually 5 days.
3.What payment methods are accepted for MAX4323ESA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4323ESA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4323ESA-T?
MAX4323ESA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4323ESA-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 MAX4323ESA-T?
For technical support, including MAX4323ESA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4323ESA-T requirements.
6.How does Aetrix verify that MAX4323ESA-T is sourced from the original manufacturer or authorized distributors?
All MAX4323ESA-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 MAX4323ESA-T meets industry standards.
7.What is the process for return or replacement of MAX4323ESA-T?
All MAX4323ESA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4323ESA-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 MAX4323ESA-T part is unused and in its original packaging.
Return procedure for MAX4323ESA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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