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Analog Devices Inc./Maxim Integrated MAX492CSA+T
- Part No.:
- MAX492CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX492CSA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX492CSA+T from Maxim Integrated is a dual, micropower, single-supply rail-to-rail operational amplifier optimized for low-voltage battery-powered systems. It operates from +2.7V to +6V, delivers 500kHz gain-bandwidth, draws ≤150µA per amplifier, achieves ±200µV input offset voltage (typ), and drives 1kΩ loads while maintaining rail-to-rail input common-mode range (VEE to VCC) and rail-to-rail output swing - enabling precision signal conditioning in portable medical sensors and handheld data loggers.
For engineers reviewing the MAX492CSA+T datasheet, MAX492CSA+T pinout, MAX492CSA+T application, or MAX492CSA+T equivalent, key selection criteria include its 150µA quiescent current per op amp, 200µV max offset voltage at +25°C, rail-to-rail I/O capability down to 2.7V supply, unity-gain stability, and SO-8 package compatibility with industry-standard op-amp footprints.
Technical Context
The MAX492CSA+T integrates two complementary-input-stage op amps (NPN and PNP) in parallel to achieve rail-to-rail input common-mode range extending 0.25V beyond VEE and VCC, with no phase reversal on overdrive. Its folded-cascode architecture supports high DC accuracy while maintaining low power consumption.
Each amplifier features internal protection diodes (±0.7V differential limit) and is specified across three temperature grades: commercial (0°C to +70°C), extended (–40°C to +85°C), and military (–55°C to +125°C); the MAX492CSA+T corresponds to the commercial grade in 8-pin SO package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6V - enables direct operation from single Li-ion or two alkaline cells without regulation. |
| Quiescent Current per Amp | 150µA max - allows continuous operation for years on coin-cell batteries in always-on sensor front-ends. |
| Input Offset Voltage | ±200µV (max at +25°C) - ensures sub-LSB error in 12-bit ADC buffering applications like MAX187 interfacing. |
| Gain-Bandwidth Product | 500kHz - supports stable unity-gain buffering of baseband biosignals (ECG, pulse oximetry) up to ~50kHz. |
| Output Voltage Swing | VCC – 0.075V / VEE + 0.075V (RL = 100kΩ) - delivers >97% dynamic range at 3V supply, critical for low-voltage precision amplification. |
| Common-Mode Rejection Ratio | 90dB (min) - rejects supply ripple and EMI coupling in noisy portable environments without external filtering. |
| Input Noise Density | 25nV/√Hz - preserves SNR in low-level transducer signal chains (e.g., thermopile or strain gauge interfaces). |
Pinout & Package
MAX492CSA+T is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard dual op-amp footprints. The package meets JEDEC MS-012AC and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - connects directly to load or next stage; rail-to-rail swing supports full-scale ADC input drive. |
| 2 | IN1− | Inverting input of Amp 1 - matched impedance routing required to minimize bias-current-induced offset. |
| 3 | IN1+ | Noninverting input of Amp 1 - accepts signals from VEE to VCC; internal protection diodes limit differential input to ±0.7V. |
| 4 | VEE | Negative supply pin - tied to ground in single-supply mode; must be bypassed with 1µF + 0.1µF ceramic capacitors. |
| 5 | IN2+ | Noninverting input of Amp 2 - identical electrical behavior to IN1+; supports independent dual-channel signal paths. |
| 6 | IN2− | Inverting input of Amp 2 - routed with matched trace length to IN2+ for common-mode rejection optimization. |
| 7 | OUT2 | Amplifier 2 output - electrically isolated from OUT1; enables dual-sensor conditioning on one IC. |
| 8 | VCC | Positive supply pin - accepts 2.7V–6V; low PSRR (110dB) demands clean, locally filtered supply. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.25V beyond VEE and VCC - eliminates level-shifting circuitry when interfacing with unbuffered sensors or DACs. |
| No phase reversal on overdrive | Guaranteed operation without latch-up even when inputs exceed rails - improves reliability in transient-prone battery systems. |
| Drives ≥1nF capacitive loads | Stable with 1000pF pure capacitance (RL = ∞) - enables direct connection to ADC sample-and-hold inputs without isolation resistors. |
| Unity-gain stable | Operates reliably as voltage follower without external compensation - simplifies design of high-impedance sensor buffers. |
| Low input bias current | ±25nA typical - minimizes voltage error across high-value source resistors (e.g., pH electrode interfaces). |
| High CMRR and PSRR | 90dB CMRR / 110dB PSRR - maintains accuracy in shared PCB power domains with digital noise sources. |
Applications
| Portable Medical Sensors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or EMG signals in handheld diagnostic devices powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail instrumentation buffer - first gain stage before 12-bit SAR ADC. Use Value: 150µA per amplifier enables multi-day continuous monitoring; 200µV offset contributes <0.5 LSB error at 4.096V reference. |
Use Scenario: Conditioning thermistor and humidity sensor outputs in field-deployed environmental monitors running on AA batteries. IC Role / Device Role / Timing Role: Dual op amp providing programmable gain and offset correction prior to multiplexed ADC sampling. Use Value: Rail-to-rail I/O preserves full sensor dynamic range at 3.3V supply; 500kHz GBW supports 100Hz sensor bandwidth with margin. |
| Low-Voltage Industrial Transducers | Single-Supply Signal Chains |
Use Scenario: Interfacing 100Ω RTD bridges and piezoresistive pressure sensors in battery-operated IoT edge nodes. IC Role / Device Role / Timing Role: Precision differential-to-single-ended converter and gain stage in analog front-end. Use Value: 90dB CMRR rejects common-mode noise from long sensor cables; 25nV/√Hz noise density maintains resolution below 1mK. |
Use Scenario: Building compact, low-power analog signal paths for portable test equipment using only +5V or +3.3V rails. IC Role / Device Role / Timing Role: Dual rail-to-rail op amp serving as active filter, level shifter, and ADC driver in unified signal chain. Use Value: Eliminates need for dual supplies or charge pumps; SO-8 footprint allows drop-in replacement of legacy dual op amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher quiescent current (550µA vs. 150µA), wider supply range (2.7V–6V same), lower offset (150µV max), 1.5MHz GBW | Better AC performance but 3.6× higher supply current - unsuitable for multi-year coin-cell operation | Select when bandwidth >500kHz is required and power budget allows ≥500µA per amp |
| AD8602ARMZ | Lower offset (60µV max), higher GBW (10MHz), higher supply current (1.2mA), same SO-8 package | Superior precision and speed, but 8× higher IQ - incompatible with ultra-low-power sensor nodes | Choose for high-resolution metrology where battery life is secondary to accuracy and settling time |
Compared with TLV2462IDR and AD8602ARMZ, the MAX492CSA+T uniquely balances micropower operation (150µA), rail-to-rail I/O, and adequate bandwidth (500kHz) for cost-sensitive, long-life portable instrumentation - making it irreplaceable where µA-level quiescent current is mandatory.
Availability
MAX492CSA+T is available at Aetrix Electronics and suitable for portable medical sensors, battery-powered data loggers, and low-voltage industrial transducers requiring stable component supply and long-term obsolescence management.
Supply support for MAX492CSA+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, medical, and communications applications.
The MAX492CSA+T belongs to the MAX492/MAX494/MAX495 family of micropower rail-to-rail op amps engineered specifically for battery-operated instrumentation where ultra-low IQ, wide supply range, and DC accuracy are non-negotiable.
FAQ
What is the operating temperature range for MAX492CSA+T?
The MAX492CSA+T is rated for the commercial temperature range of 0°C to +70°C. This specification is confirmed in the Ordering Information table, where "MAX492CSA" maps to the "C" grade suffix. It is not rated for extended (–40°C to +85°C) or military (–55°C to +125°C) ranges - those require MAX492ESA or MAX492MJA variants respectively. Always verify ambient and junction temperatures during thermal design.
Does MAX492CSA+T support single-supply operation?
Yes, MAX492CSA+T fully supports single-supply operation from +2.7V to +6V. Its rail-to-rail input common-mode range extends from VEE (ground) to VCC, and its output swings within 75mV of both rails under 100kΩ load - enabling direct interfacing with unipolar sensors and ADCs without level-shifting circuitry. This is explicitly stated in the General Description and confirmed in Absolute Maximum Ratings.
Is MAX492CSA+T pin-compatible with other dual op amps?
Yes, MAX492CSA+T uses the standard 8-pin SO package with industry-standard dual op-amp pinout (OUT1, IN1−, IN1+, VEE, IN2+, IN2−, OUT2, VCC). It matches the footprint and pin function of LM358, TLC272, and TLV2462 - allowing direct PCB replacement where quiescent current and rail-to-rail performance are acceptable trade-offs. Pin configuration diagrams confirm identical top-view layout.
Can MAX492CSA+T drive large capacitive loads?
Yes, MAX492CSA+T is characterized to drive capacitive loads exceeding 1nF. The datasheet confirms stable operation with 1000pF (Figure 6) and defines a stable region up to 400pF even when sourcing ~100µA (Figure 5). For >1nF loads, adding a small series isolation resistor (e.g., 47Ω) at the output improves phase margin without degrading DC accuracy - a key advantage over many competing micropower op amps.
What is the input offset voltage specification for MAX492CSA+T?
The MAX492CSA+T has a maximum input offset voltage of ±200µV at +25°C and 0°C to +70°C, as specified in the DC Electrical Characteristics table under "Input Offset Voltage". At temperature extremes, the max increases to ±650µV (–40°C to +85°C) and ±950µV (–55°C to +125°C). The typical value is 200µV, and offset tempco is ±2µV/°C - critical for precision DC-coupled applications like thermocouple amplification.
MAX492CSA+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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 25 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX492CSA+T FAQ
1.How can I place an order for MAX492CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX492CSA+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 MAX492CSA+T reliable?
The price and inventory of MAX492CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX492CSA+T is usually 5 days.
3.What payment methods are accepted for MAX492CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX492CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX492CSA+T?
MAX492CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX492CSA+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 MAX492CSA+T?
For technical support, including MAX492CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX492CSA+T requirements.
6.How does Aetrix verify that MAX492CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX492CSA+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 MAX492CSA+T meets industry standards.
7.What is the process for return or replacement of MAX492CSA+T?
All MAX492CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX492CSA+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 MAX492CSA+T part is unused and in its original packaging.
Return procedure for MAX492CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX492CSA+T Tags
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