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Analog Devices Inc./Maxim Integrated MAX4332ESA
- Part No.:
- MAX4332ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4332ESA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,057
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Product details
Overview
MAX4332ESA from Maxim Integrated is a dual, low-power, rail-to-rail input/output operational amplifier optimized for single-supply, low-voltage signal conditioning. It delivers 3MHz gain-bandwidth, 245µA per amplifier quiescent current, ±0.65mV input offset voltage (max), and rail-to-rail output swing down to 2.3V supply - making it suitable for battery-powered data-acquisition front-ends and portable sensor interfaces.
For engineers reviewing the MAX4332ESA datasheet, MAX4332ESA pinout, MAX4332ESA application, or MAX4332ESA equivalent, key selection criteria include dual-channel rail-to-rail I/O performance at sub-250µA per amp, SO-8 package compatibility with space-constrained PCBs, shutdown capability absence (distinguishing it from MAX4333ESD), and verified operation across –40°C to +85°C industrial temperature range.
Technical Context
The MAX4332ESA implements a composite NPN/PNP rail-to-rail input stage enabling common-mode voltage range from VEE – 0.25V to VCC + 0.25V, with crossover-region CMRR optimization. Its unity-gain-stable output stage drives 2kΩ loads while maintaining ≤125mV rail margin at 2.3V supply.
Unlike the MAX4333ESD, the MAX4332ESA lacks shutdown control pins and operates exclusively in active mode - eliminating leakage path concerns but requiring external power gating for ultra-low standby systems. It shares identical AC performance (3MHz GBWP, 10V/µs slew rate) and DC accuracy specs (±0.65mV VOS max, ±115nA IB max) with its family members in the same SO-8 package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable unity-gain buffering of signals up to ~1.5MHz with <0.1% gain error. |
| Quiescent Current per Amp | 245µA (typ) - enables dual-channel amplification from coin-cell or Li-ion sources for >1-year battery life in low-duty-cycle sensors. |
| Input Offset Voltage | ±0.65mV (max, –40°C to +85°C) - ensures ≤0.013% full-scale error in 5V-span 12-bit ADC front-ends without trimming. |
| Rail-to-Rail Output Swing | Within 125mV of rails into 2kΩ - preserves dynamic range in single-supply 2.3–6.5V systems, e.g., 3.3V microcontroller analog inputs. |
| Common-Mode Input Range | VEE – 0.25V to VCC + 0.25V - accepts inputs beyond supply rails, critical for direct connection to resistive sensor bridges. |
| Supply Voltage Range | +2.3V to +6.5V single supply - operates reliably at 2.5V logic-compatible rails and tolerates brownout down to 2.0V (typ). |
| Large-Signal Voltage Gain | 78dB (min) - provides ≥7900 V/V open-loop gain for precision closed-loop configurations with <0.01% linearity error. |
Pinout & Package
MAX4332ESA is housed in an 8-pin SO (Small Outline) package with standard JEDEC MS-012AC footprint (body size 4.9mm × 3.9mm, lead pitch 1.27mm). Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | High-impedance rail-to-rail output node; requires no pull-up/down for proper operation in unity-gain buffer or inverting configurations. |
| 2 (IN1–) | Amplifier 1 inverting input | Differential input terminal; internal 1kΩ series protection resistors limit fault current during overvoltage events. |
| 3 (IN1+) | Amplifier 1 noninverting input | Differential input terminal; matched impedance to IN1– minimizes bias-current-induced offset in high-Z sensor interfaces. |
| 4 (VEE) | Negative supply / ground | Reference node for single-supply operation; must be bypassed with 0.1µF capacitor to reduce PSRR degradation at high frequencies. |
| 5 (IN2+) | Amplifier 2 noninverting input | Independent input for second channel; electrically isolated from Channel 1 except through shared VEE/VCC supply paths. |
| 6 (IN2–) | Amplifier 2 inverting input | Second differential pair input; polarity reversal behavior near VCC/VEE crossover requires symmetric source impedances for minimal offset. |
| 7 (OUT2) | Amplifier 2 output | Second rail-to-rail output; capable of driving capacitive loads ≤150pF without external compensation. |
| 8 (VCC) | Positive supply | Primary power rail; bypassing with 0.1µF ceramic capacitor directly at pin reduces supply noise coupling into both amplifier channels. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.25V beyond both supply rails - enables direct interfacing with unbuffered thermistor, RTD, or strain gauge bridges operating near VEE or VCC. |
| No phase reversal on overdriven inputs | Prevents catastrophic latch-up or signal inversion when inputs exceed common-mode limits - critical for robustness in noisy industrial environments. |
| Capacitive load stability | Stable with ≤150pF loads - eliminates need for isolation resistors in LCD bias, DAC output buffering, or filter driver applications. |
| Low input bias current | ±115nA max (–40°C to +85°C) - reduces voltage error across high-value feedback networks (e.g., 1MΩ gain-setting resistors yield <115µV offset). |
| Unity-gain stable | Guaranteed stable in follower configuration without external compensation - simplifies design of precision reference buffers and active filters. |
Applications
| Portable Sensor Signal Conditioning | Data-Acquisition Front-End |
|---|---|
Use Scenario: Amplifying mV-level outputs from MEMS accelerometers or humidity sensors powered by 3.3V LDOs in handheld IoT devices. IC Role / Device Role / Timing Role: Dual-channel precision op amp providing gain, level-shifting, and rail-to-rail buffering prior to SAR ADC sampling. Use Value: 245µA per amp quiescent current extends battery life; rail-to-rail I/O preserves full sensor dynamic range without external level-shifters. | Use Scenario: Driving 12-bit successive-approximation ADC inputs in industrial PLC analog input modules with 4–20mA loop receivers. IC Role / Device Role / Timing Role: Dual op amp configured as programmable-gain amplifier (PGA) and anti-aliasing filter driver. Use Value: ±0.65mV max VOS ensures <0.1% measurement accuracy; 3MHz GBWP supports filtering up to 100kHz without phase lag. |
| Low-Voltage Battery Monitoring | Medical Instrumentation Analog Front-End |
Use Scenario: Measuring cell voltage in 2-cell Li-ion packs (2.4–8.4V range) using resistor dividers and single-supply microcontrollers. IC Role / Device Role / Timing Role: Dual op amp used as differential voltage monitor and charge-state comparator reference buffer. Use Value: Operation down to 2.3V supply allows monitoring during deep discharge; rail-to-rail output ensures clean logic-level transitions to MCU GPIOs. | Use Scenario: Amplifying ECG electrode signals in portable patient monitors where power budget and noise immunity are critical. IC Role / Device Role / Timing Role: Dual op amp implementing instrumentation amplifier first stage and right-leg drive buffer. Use Value: 2.3MΩ typical differential input resistance minimizes loading on high-impedance biopotential electrodes; low THD (<0.004%) preserves waveform fidelity. |
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 |
|---|---|---|---|
| TLV2462IDR | Higher quiescent current (550µA/amp), wider supply range (2.7–6V), no extended common-mode range beyond rails | Lacks VEE–0.25V input capability - unsuitable for direct bridge sensing without level-shifting | Select when higher drive strength (15mA short-circuit) or better PSRR (100dB) outweighs current budget constraints. |
| AD8602ARZ | Lower offset (±60µV max), lower noise (12nV/√Hz), but only 1MHz GBWP and no rail-to-rail input beyond supplies | Cannot accept inputs below VEE - requires external biasing for ground-referenced sensors | Choose for ultra-precision DC-coupled applications where bandwidth <1MHz suffices and offset dominates error budget. |
Compared with TLV2462IDR and AD8602ARZ, the MAX4332ESA uniquely balances ultra-low power (245µA), true rail-to-rail input extension (VEE–0.25V), and 3MHz bandwidth - making it optimal for battery-powered, wide-dynamic-range sensor interfaces where all three traits are simultaneously required.
Availability
MAX4332ESA is available at Aetrix Electronics and suitable for portable medical devices, industrial data loggers, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4332ESA 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 industrial, automotive, communications, and computing applications.
The MAX4330–MAX4334 family was engineered specifically for low-voltage, single-supply signal-conditioning tasks - prioritizing rail-to-rail I/O, sub-250µA power, and robustness in portable and harsh-environment systems.
FAQ
Does MAX4332ESA support shutdown mode like MAX4333ESD?
No, MAX4332ESA does not include shutdown functionality. Unlike MAX4333ESD, which features SHDN1/SHDN2 pins enabling 9µA per amplifier standby current, MAX4332ESA operates continuously. Its quiescent current remains fixed at 245µA per amplifier across all conditions. For systems requiring power gating, external MOSFET-based supply switching must be implemented upstream of the MAX4332ESA's VCC pin.
What is the maximum capacitive load the MAX4332ESA can drive stably?
The MAX4332ESA is specified stable with capacitive loads up to 150pF when driving resistive loads ≥2kΩ. This is confirmed in the Capacitive Load Stability graph (Figure MAX4330/34-TOC21) and enables direct driving of ADC input capacitors, LCD bias nodes, and small piezoelectric transducers without external isolation resistors - provided the total load capacitance (including PCB trace and device parasitics) stays within this limit.
Can MAX4332ESA operate from a 2.0V supply despite the 2.3V minimum rating?
Yes - the datasheet states "although the minimum operating voltage is specified at 2.3V, these devices typically operate down to 2.0V." This behavior is verified in Typical Operating Characteristics (Figure MAX4330/34-TOC18), showing functional operation at 2.0V across –40°C to +85°C. However, parameters such as GBWP, slew rate, and output swing degrade at 2.0V; design validation under actual load and temperature conditions is recommended.
How does the input stage architecture of MAX4332ESA affect bias current matching?
The MAX4332ESA uses complementary NPN/PNP input pairs to achieve rail-to-rail common-mode range, causing input bias current polarity to reverse near the VCC/VEE midpoint. To minimize offset, external source impedances at IN+ and IN– must be closely matched - ideally within 1% - especially in high-gain configurations. Mismatch greater than 5% may introduce >100µV additional offset due to bias current flow through unequal resistances.
Is MAX4332ESA pin-compatible with other dual op amps in SO-8 packages like LM358 or MCP6022?
No - MAX4332ESA follows a nonstandard SO-8 pinout optimized for dual independent amplifiers: Pin 1 = OUT1, Pin 2 = IN1–, Pin 3 = IN1+, Pin 4 = VEE, Pin 5 = IN2+, Pin 6 = IN2–, Pin 7 = OUT2, Pin 8 = VCC. This differs from industry-standard dual op amps (e.g., LM358: Pin 1 = OUT1, Pin 2 = IN1–, Pin 3 = IN1+, Pin 4 = VEE, Pin 5 = IN2+, Pin 6 = IN2–, Pin 7 = OUT2, Pin 8 = VCC), making it functionally compatible but not drop-in replaceable without PCB layout revision.
MAX4332ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-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:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 250 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:
- 8-SOIC
MAX4332ESA FAQ
1.How can I place an order for MAX4332ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4332ESA 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 MAX4332ESA reliable?
The price and inventory of MAX4332ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4332ESA is usually 5 days.
3.What payment methods are accepted for MAX4332ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4332ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4332ESA?
MAX4332ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4332ESA 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 MAX4332ESA?
For technical support, including MAX4332ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4332ESA requirements.
6.How does Aetrix verify that MAX4332ESA is sourced from the original manufacturer or authorized distributors?
All MAX4332ESA 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 MAX4332ESA meets industry standards.
7.What is the process for return or replacement of MAX4332ESA?
All MAX4332ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4332ESA, 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 MAX4332ESA part is unused and in its original packaging.
Return procedure for MAX4332ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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