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Analog Devices Inc./Maxim Integrated MAX473CUA
- Part No.:
- MAX473CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX473CUA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:265
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Product details
Overview
MAX473CUA from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier optimized for single-supply portable systems. It delivers 10MHz unity-gain bandwidth, 15V/µs slew rate, ±2.0mV input offset voltage (typ), 2mA supply current per amplifier, and rail-to-rail output swing within ±50mV of both rails - enabling precision signal conditioning in battery-powered instrumentation.
For engineers reviewing the MAX473CUA datasheet, MAX473CUA pinout, MAX473CUA application, or MAX473CUA equivalent, key selection criteria include its guaranteed 10MHz bandwidth at 3V operation, 600Ω drive capability, input range extending to VEE, short-circuit protected output, and µMAX package compatibility with space-constrained PCB layouts.
Technical Context
The MAX473CUA employs a bipolar input stage with output transistors configured for rail-to-rail swing, achieving full-scale output within 50mV of VCC and VEE across 0°C to +70°C. Its unity-gain stability is verified with 10kΩ || 20pF load and 63° phase margin, supporting robust buffer and filter configurations without external compensation.
Designed for single-supply operation from 2.7V to 5.25V, it features input common-mode range including the negative rail and output drive capability up to 5mA sourcing/sinking. Bias currents flow out of both inputs, requiring matched source impedances to minimize offset error - a critical consideration in high-precision inverting and noninverting gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 10MHz (guaranteed minimum; enables stable AC amplification up to 10MHz at AV = 1) |
| Slew Rate | 15V/µs min (supports full-power bandwidth >1MHz with 10Vpp output) |
| Supply Current per Amplifier | 2.0mA typ at VCC = 3V (enables low-power operation in always-on sensor front-ends) |
| Input Offset Voltage | ±2.0mV max at TA = +25°C (ensures <0.1% gain error in 1V-range signal chains) |
| Rail-to-Rail Output Swing | Within ±50mV of VCC and VEE (maximizes dynamic range in 3V systems) |
| Input Common-Mode Range | Includes VEE (0V) to VCC – 1.9V (allows ground-referenced input signals) |
| Small-Signal Settling Time | 400ns to 0.1% (critical for multiplexed data acquisition with fast channel switching) |
Pinout & Package
MAX473CUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.8mm height), the smallest industry-standard 8-pin SO footprint. Pin assignments follow standard op-amp configuration for single-channel devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output terminal; capable of sourcing/sinking ≥5mA with rail-to-rail swing |
| 2 | IN− | Inverting input; bias current flows out (requires matched impedance to IN+ for offset minimization) |
| 3 | IN+ | Noninverting input; common-mode range includes VEE (0V) for ground-referenced sensing |
| 4 | VEE | Negative supply pin; connected to ground in single-supply operation |
| 5 | N.C. | No internal connection; must be left unconnected or tied to VEE for mechanical stability |
| 6 | VCC | Positive supply pin; operates from 2.7V to 5.25V; requires 0.1µF bypass capacitor |
| 7 | NULL | Offset null terminal; connects to wiper of 2kΩ potentiometer for fine-tuning input offset voltage |
| 8 | NULL | Second offset null terminal; completes trim network with pin 1 and VEE |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings to within 50mV of VCC and VEE - preserves >96% of 3V supply range for analog signal fidelity |
| Single-supply operation | Functional from 2.7V to 5.25V - eliminates need for dual supplies in portable equipment |
| 15V/µs min slew rate | Enables distortion-free amplification of 1MHz, 10Vpp signals without slewing artifacts |
| Input range includes VEE | Accepts 0V-referenced inputs directly - simplifies sensor interfacing without level-shifting circuitry |
| Short-circuit protected output | Withstands indefinite output short to VCC or VEE - improves system reliability in field-deployed instruments |
Applications
| Battery-Powered Instrumentation | Portable Signal Conditioning |
|---|---|
Use Scenario: Precision front-end amplification in handheld multimeters and portable oscilloscopes operating from 3V coin cells. IC Role / Device Role / Timing Role: Single-supply op amp configured as unity-gain buffer and programmable-gain stage for ADC input scaling. Use Value: Rail-to-rail output swing maximizes ADC utilization; 2mA quiescent current extends battery life beyond 100 hours at 1kHz sampling. |
Use Scenario: Low-noise amplification of piezoelectric sensor outputs in portable vibration analyzers. IC Role / Device Role / Timing Role: Inverting amplifier with matched input resistors to cancel bias-current-induced offset in high-Z sensor interfaces. Use Value: ±2.0mV max VOS ensures sub-0.1% measurement accuracy; 10MHz GBW supports transient capture up to 500kHz. |
| Discrete Active Filters | Servo-Loop Compensation |
Use Scenario: 4th-order bandpass filter (fo = 190kHz, Q = 10) built using one MAX475 quad op amp - each section implemented with one MAX473CUA-equivalent channel. IC Role / Device Role / Timing Role: Transconductance-stage op amp providing precise pole/zero placement and gain control in continuous-time analog filters. Use Value: Guaranteed 10MHz GBW ensures filter response remains stable and accurate across temperature; 15V/µs slew rate prevents distortion on 1Vpp passband signals. |
Use Scenario: Error amplifier in closed-loop motor position control systems requiring fast correction of step disturbances. IC Role / Device Role / Timing Role: High-speed comparator replacement in analog servo feedback paths, delivering linear error amplification with minimal phase lag. Use Value: 400ns settling time to 0.1% enables sub-millisecond loop correction; rail-to-rail output drives PWM modulator inputs directly from 3V logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Lower slew rate (1V/µs), wider supply range (2.7V–5.5V), no offset null pins | Not suitable for high-speed filtering or fast-settling data acquisition | Select when ultra-low power (<100µA) dominates over speed; not recommended for MAX473CUA's 10MHz/15V/µs use cases |
| TLV2461CDCKR | Higher supply current (550µA typ), rail-to-rail I/O, no offset trim capability | Lacks pin-compatible offset adjustment; lower drive strength (15mA vs 5mA) | Prefer for cost-sensitive, moderate-speed designs where offset trimming is unnecessary and layout space allows larger SC70-5 package |
Compared with LMV321IDBVR and TLV2461CDCKR, the MAX473CUA uniquely combines 10MHz bandwidth, 15V/µs slew rate, and user-adjustable offset in an 8-pin µMAX package - making it irreplaceable in legacy portable instrumentation requiring precision, speed, and board-area efficiency.
Availability
MAX473CUA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable signal conditioning, discrete active filters, and servo-loop compensation requiring stable component supply and long-term design continuity.
Supply support for MAX473CUA 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 fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, communications, and consumer applications.
The MAX473CUA belongs to Maxim's precision single-supply op amp product line, engineered specifically for portable, low-voltage systems demanding rail-to-rail performance, speed, and compact packaging without sacrificing DC accuracy.
FAQ
What is the operating temperature range for MAX473CUA?
The MAX473CUA is specified for operation from 0°C to +70°C ambient temperature. This commercial-grade range aligns with its intended use in portable consumer and industrial instrumentation where environmental extremes are limited. The device's electrical characteristics - including 10MHz bandwidth, 15V/µs slew rate, and ±2.0mV input offset voltage - are guaranteed across this full range, not just at +25°C.
Does MAX473CUA support true rail-to-rail input operation?
No, the MAX473CUA does not support rail-to-rail input. Its input common-mode voltage range extends from VEE (0V) to VCC – 1.9V, meaning it accepts signals down to ground but cannot handle inputs near VCC. However, its output is rail-to-rail - swinging to within ±50mV of both VCC and VEE - which is explicitly confirmed in the datasheet's Electrical Characteristics table under "Output Voltage" parameters.
Can the input offset voltage of MAX473CUA be trimmed externally?
Yes, the MAX473CUA provides dedicated offset null pins (pins 1 and 8) that allow external trimming using a 2kΩ potentiometer connected between them and VEE. This feature is unique to the single-channel MAX473 variant - the dual MAX474 and quad MAX475 do not offer offset adjustment. Trimming reduces initial VOS to <100µV, critical for high-accuracy DC-coupled measurement paths.
Is MAX473CUA unity-gain stable with capacitive loads?
The MAX473CUA is unity-gain stable but degrades in phase margin when driving capacitive loads >20pF. With 10kΩ || 20pF, phase margin is 63° - sufficient for stability. At 390pF || 10kΩ, overshoot increases significantly (Figure 3). For loads >100pF, Maxim recommends adding a 10Ω isolation resistor in series with the output (Figure 4) to restore stability - a proven method validated in the datasheet's Applications Information section.
What package type is used for MAX473CUA and how does it compare to other variants?
The MAX473CUA uses the 8-pin µMAX package (3mm × 3mm, 0.8mm height), Maxim's smallest standard 8-pin SO footprint. Unlike the DIP and SO variants (e.g., MAX473CPA, MAX473CSA), the µMAX offers superior thermal performance per unit area and reduced parasitic inductance - advantageous in high-frequency portable designs. Its pinout matches industry-standard single-op-amp layouts, ensuring drop-in compatibility in space-constrained layouts.
MAX473CUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.25 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX473CUA FAQ
1.How can I place an order for MAX473CUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX473CUA 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 MAX473CUA reliable?
The price and inventory of MAX473CUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX473CUA is usually 5 days.
3.What payment methods are accepted for MAX473CUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX473CUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX473CUA?
MAX473CUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX473CUA 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 MAX473CUA?
For technical support, including MAX473CUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX473CUA requirements.
6.How does Aetrix verify that MAX473CUA is sourced from the original manufacturer or authorized distributors?
All MAX473CUA 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 MAX473CUA meets industry standards.
7.What is the process for return or replacement of MAX473CUA?
All MAX473CUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX473CUA, 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 MAX473CUA part is unused and in its original packaging.
Return procedure for MAX473CUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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