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Analog Devices Inc./Maxim Integrated MAX4327ESD
- Part No.:
- MAX4327ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4327ESD.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,799
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Product details
Overview
The MAX4327ESD from Maxim Integrated is a dual, 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 (25°C), and supports shutdown mode reducing supply current to 40–60µA. It operates from 2.4V to 6.5V single supply and drives 250Ω loads - ideal for battery-powered data-acquisition front-ends.
For engineers reviewing the MAX4327ESD datasheet, MAX4327ESD pinout, MAX4327ESD application, or MAX4327ESD equivalent, key selection criteria include its dual-channel rail-to-rail I/O performance, independent shutdown control per amplifier, 14-pin SO package compatibility with space-constrained industrial sensors and portable instrumentation, and verified stability with up to 500pF capacitive loads.
Technical Context
The MAX4327ESD implements a bipolar-input stage with complementary NPN/PNP differential pairs enabling true rail-to-rail input common-mode range (VEE to VCC) and output swing within 120mV of rails under 250Ω load. Its unity-gain-stable architecture supports capacitive loads up to 500pF without external compensation.
Each amplifier features independent SHDN1/SHDN2 control pins, allowing selective channel disablement while maintaining bias on the active channel. Shutdown places outputs in high-impedance state and reduces ICC per amplifier to ≤60µA at +25°C, with turn-on time <1µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation up to 100kHz with gain ≥50, suitable for anti-aliasing and sensor amplification stages. |
| Supply Current per Amplifier | 650µA at VCC = 2.4V - ensures ultra-low power consumption in always-on battery monitoring circuits. |
| Input Offset Voltage | ±0.7mV (typ) at +25°C - minimizes DC error in precision 12-bit ADC front-ends operating down to 3V supply. |
| Output Voltage Swing | Within 120mV of VEE and 350mV of VCC into 250Ω - preserves dynamic range in single-supply 3.3V systems driving resistive loads. |
| Shutdown Supply Current | 40–60µA per amplifier - allows >90% current reduction during idle periods in duty-cycled sensor nodes. |
| Capacitive-Load Stability | Stable with CL ≤ 500pF - eliminates need for isolation resistors when driving ADC input capacitance or long PCB traces. |
| Slew Rate | 2V/µs - supports 10kHz full-scale sine wave output with <1% distortion into 250Ω. |
Pinout & Package
The MAX4327ESD is housed in a 14-pin SO (Small Outline) package with standard 0.150" body width and 1.27mm lead pitch, compatible with IPC-7351B SOIC-14 footprint. Thermal resistance θJA is 80°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | OUT1, OUT2 | Dual independent amplifier outputs - each capable of sourcing/sinking ±20mA into 250Ω loads with rail-to-rail swing. |
| 2, 6 | IN1−, IN2− | Inverting inputs - high-impedance (≥500kΩ) differential pair inputs with no phase reversal on overdrive. |
| 3, 5 | IN1+, IN2+ | Noninverting inputs - support common-mode range from VEE to VCC, enabling direct connection to grounded sensors. |
| 4, 12 | VEE | Negative supply / ground reference - must be connected to system ground in single-supply configurations. |
| 7, 14 | VCC | Positive supply - accepts 2.4V–6.5V; requires local 0.1µF ceramic + 1µF bulk bypassing. |
| 8, 10 | SHDN1, SHDN2 | Independent shutdown controls - logic-low (<0.8V) disables corresponding amplifier and forces output high-Z. |
| 9, 11 | N.C. | No internal connection - left unconnected; no routing or grounding required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from VEE to VCC - eliminates level-shifting needs for 0–3.3V sensor outputs. |
| Independent per-amplifier shutdown | SHDN1/SHDN2 allow asymmetric power management - e.g., keep Channel 1 active for wake-up detection while disabling Channel 2. |
| Unity-gain stability with 500pF load | Eliminates external compensation components when interfacing to SAR ADCs with 10–20pF input capacitance plus trace parasitics. |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous output transitions during transient overload - critical in protection circuitry and RSSI detectors. |
| Low input bias current polarity flip mitigation | Matched source impedances on IN+ and IN− reduce offset drift across VCC/2 transition region - improves DC accuracy in noninverting gain stages. |
Applications
| Battery-Powered Data Acquisition | RSSI Signal Conditioning |
|---|---|
Use Scenario: Portable multimeter measuring 0–2.5V sensor outputs with 12-bit SAR ADC sampling at 100ksps. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: Channel 1 buffers thermistor voltage; Channel 2 amplifies and offsets photodiode current via transimpedance configuration. Use Value: 650µA per amplifier extends 2xAA battery life to >12 months in sleep-wake cycles; rail-to-rail I/O captures full ADC input range without external biasing. | Use Scenario: Cellular IoT module measuring received signal strength across GSM/UMTS bands using logarithmic detector output. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier conditioning weak analog RSSI voltage (0.1–1.8V) before ADC digitization. Use Value: ±0.7mV offset ensures <0.5dB RSSI measurement error; 5MHz GBW supports fast AGC loop response during handover events. |
| PA Bias Control Interface | Low-Voltage Portable Instrumentation |
Use Scenario: Closed-loop bias control for 3.3V RF power amplifier in handheld radio, adjusting gate voltage based on temperature-compensated current sense. IC Role / Device Role / Timing Role: Dual op-amp implementing error amplifier (Channel 1) and temperature-compensation summer (Channel 2) in analog feedback path. Use Value: Independent SHDN pins enable dynamic power gating of compensation channel during standby - reducing total bias circuit ICC by 45%. | Use Scenario: Handheld medical pulse oximeter requiring simultaneous analog processing of red/IR photodiode signals with <1% gain error. IC Role / Device Role / Timing Role: Dual TIA front-end: Channel 1 converts red LED photodiode current; Channel 2 handles IR LED channel with matched gain and bandwidth. Use Value: Matched AC specs (GBW, SR) and DC specs (VOS, TCVO) between channels ensure consistent pulse amplitude ratio calculation for SpO₂ computation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8602ARZ | Single-supply range 2.7–6V; 0.25mV max VOS; higher 10MHz GBW but 1.3mA ICC per amp. | Higher precision and speed, but 2× quiescent current - unsuitable for multi-year battery life targets. | Select AD8602ARZ only when sub-100µV offset and >500kHz closed-loop bandwidth are mandatory. |
| TLV2462IDR | 2.7–6V supply; 1.25mV max VOS; 6.4MHz GBW; no independent shutdown - single SHDN pin disables both amps. | Lacks per-channel shutdown; wider VOS spec impacts low-level signal fidelity in 12-bit systems. | Choose TLV2462IDR for cost-sensitive designs where unified shutdown suffices and 1.25mV VOS meets system error budget. |
Compared with AD8602ARZ and TLV2462IDR, the MAX4327ESD uniquely balances ultra-low ICC (650µA), independent shutdown, and guaranteed 5MHz GBW in a 14-pin SO package - making it optimal for dual-channel, battery-constrained, precision analog front-ends requiring flexible power management.
Availability
The MAX4327ESD is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for MAX4327ESD 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications.
The MAX4322–MAX4329 family was engineered specifically for low-voltage, single-supply precision signal conditioning - emphasizing rail-to-rail I/O, micropower operation, and robust capacitive-load drive capability in compact packages.
FAQ
What is the maximum capacitive load the MAX4327ESD can drive without oscillation?
According to the datasheet, the MAX4327ESD remains stable with capacitive loads up to 500pF in unity-gain configuration. This is verified in Figure 4 (Stable Operating Region) and Figure 5 (Transient Response with CL = 500pF). For loads exceeding 500pF, an isolation resistor (e.g., 39Ω) in series with the output restores stability, as shown in Figure 6. The MAX4327ESD's internal compensation eliminates need for external poles in typical ADC interface scenarios.
Does the MAX4327ESD support dual-supply operation, and what are the limits?
Yes, the MAX4327ESD supports dual-supply operation with voltage ranges of ±1.2V to ±3.25V. This corresponds to a total supply voltage (VCC – VEE) of 2.4V to 6.5V - identical to its single-supply range. When using dual supplies, VEE connects to the negative rail (e.g., –1.2V) and VCC to the positive rail (e.g., +1.2V), enabling symmetric signal swing around ground. Absolute maximum ratings specify (VCC – VEE) ≤ 7.5V.
How does the shutdown function behave on the MAX4327ESD, and what happens to the outputs?
The MAX4327ESD features two independent shutdown pins: SHDN1 (Pin 8) controls Amplifier 1, and SHDN2 (Pin 10) controls Amplifier 2. Pulling either pin low (<0.8V) reduces that amplifier's supply current to 40–60µA and places its output (OUT1 or OUT2) in a high-impedance state - electrically disconnecting it from the load. The enabled amplifier continues normal operation. Figures 11 and 12 confirm this behavior with measured output voltage and current waveforms during shutdown transitions.
What is the input common-mode voltage range of the MAX4327ESD, and why does it matter for single-supply use?
The MAX4327ESD has a rail-to-rail input common-mode voltage range extending from VEE to VCC. In single-supply operation (e.g., VEE = 0V, VCC = 3.3V), this means inputs can swing from 0V to 3.3V - covering the full supply range. This eliminates the need for external level-shifting or bias networks when interfacing with grounded sensors or DAC outputs, preserving signal integrity and simplifying PCB layout. The datasheet confirms this in the CMVR parameter (VEE to VCC) and Figure 3.
Can the MAX4327ESD drive a 250Ω load while maintaining rail-to-rail output swing, and what are the voltage limits?
Yes, the MAX4327ESD is explicitly characterized to drive 250Ω loads. At +25°C and VCC = 5V, the output voltage swing is specified as VCC – VOH ≤ 350mV and VOL – VEE ≤ 300mV into 250Ω (Table, "Output Voltage Swing" row). Thus, with a 3.3V supply, the output can swing from ~0.3V to ~3.0V - delivering >90% of the full rail-to-rail range. This capability is validated in Figures 12–13 ("MINIMUM/ MAXIMUM OUTPUT VOLTAGE vs. TEMPERATURE") and supports direct interfacing to low-impedance ADC references or analog switches.
MAX4327ESD 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:
- 2
- 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 (x2 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
MAX4327ESD FAQ
1.How can I place an order for MAX4327ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4327ESD 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 MAX4327ESD reliable?
The price and inventory of MAX4327ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4327ESD is usually 5 days.
3.What payment methods are accepted for MAX4327ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4327ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4327ESD?
MAX4327ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4327ESD 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 MAX4327ESD?
For technical support, including MAX4327ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4327ESD requirements.
6.How does Aetrix verify that MAX4327ESD is sourced from the original manufacturer or authorized distributors?
All MAX4327ESD 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 MAX4327ESD meets industry standards.
7.What is the process for return or replacement of MAX4327ESD?
All MAX4327ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4327ESD, 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 MAX4327ESD part is unused and in its original packaging.
Return procedure for MAX4327ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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