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Analog Devices Inc./Maxim Integrated MAX473CSA
- Part No.:
- MAX473CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX473CSA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,760
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Product details
Overview
MAX473CSA from Maxim Integrated is a single-channel, rail-to-rail output operational amplifier optimized for single-supply operation (2.7V to 5.25V), delivering 10MHz unity-gain bandwidth, 15V/µs minimum slew rate, and ±2.0mV input offset voltage (TA = +25°C). It guarantees 600Ω drive capability while consuming only 2.0mA per amplifier, making it suitable for precision signal conditioning in portable battery-powered instrumentation.
For engineers reviewing the MAX473CSA datasheet, MAX473CSA pinout, MAX473CSA application, or MAX473CSA equivalent, key selection criteria include guaranteed rail-to-rail output swing (within ±50mV of rails), input voltage range extending to VEE, short-circuit protected outputs, and compatibility with industry-standard 8-pin SO package layouts.
Technical Context
The MAX473CSA employs a bipolar input stage with output transistors configured for true rail-to-rail swing-output reaches within 50mV of both VCC and VEE. Its unity-gain stability is verified under 10kΩ || 20pF load, with typical phase margin of 63° and gain margin of 12dB at +25°C.
Input bias current flows *out* of both inputs (0–150nA typ), requiring matched source impedances to minimize offset error. The device supports single-supply operation down to 2.7V and maintains 10MHz bandwidth across its full operating temperature range (0°C to +70°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.25V single supply - enables direct interface with 3V and 5V logic systems without level-shifting. |
| Unity-Gain Bandwidth | 10MHz (guaranteed) - supports stable closed-loop operation up to 10MHz at AV = +1, critical for high-speed filtering and active compensation. |
| Slew Rate | 15V/µs min - ensures ≤400ns settling to 0.1% for 1V step, enabling fast large-signal response in servo loops and pulse amplification. |
| Input Offset Voltage | ±2.0mV max at +25°C - allows DC-coupled signal chains with sub-mV error budget in sensor front-ends and precision references. |
| Rail-to-Rail Output Swing | Within ±50mV of VCC and VEE - maximizes dynamic range in low-voltage systems (e.g., 3V ADC drivers), preserving >96% of supply headroom. |
| Supply Current per Amplifier | 2.0mA typ at +25°C - balances speed and power efficiency for battery-operated devices requiring sustained 10MHz performance. |
| Input Common-Mode Range | Includes VEE (0V) - permits ground-referenced input signals without level-shifting, simplifying single-supply transducer interfacing. |
Pinout & Package
MAX473CSA is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard op-amp footprints. The package measures 4.9mm × 6.0mm × 1.75mm (JEDEC MS-012AC) and features gull-wing leads for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads up to 600Ω; short-circuit protected; swings rail-to-rail (VEE + 0.05V to VCC – 0.05V). |
| 2 | IN− | Inverting input - accepts differential input voltages; bias current flows *out* (0–150nA), requiring matched impedance for offset minimization. |
| 3 | IN+ | Noninverting input - common-mode range includes VEE (0V); enables ground-referenced sensor inputs in single-supply configurations. |
| 4 | VEE | Negative supply pin - connected to ground in single-supply mode; substrate tied to VEE per die topography. |
| 5 | NULL | No connect - not internally bonded; must be left floating or grounded per layout best practices to avoid parasitic coupling. |
| 6 | VCC | Positive supply pin - bypass with 0.1µF ceramic capacitor close to pin to maintain PSRR >80dB and channel separation >120dB. |
| 7 | NULL | No connect - unconnected die bond pad; electrically isolated; no routing or thermal tie required. |
| 8 | NULL | Offset null terminal - unused in MAX473CSA; pins 1 and 8 are designated for external trim potentiometer (2kΩ) in MAX473CPA variant only. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Output delivers ≥96% of full supply range (VEE + 50mV to VCC – 50mV), maximizing SNR in 3V ADC driver stages. |
| Unity-gain stable architecture | Stable with 10kΩ || 20pF load and phase margin ≥63°, eliminating need for external compensation in buffer/gain-of-one circuits. |
| Single-supply operation from 2.7V | Operates down to 2.7V while maintaining 10MHz GBW and 15V/µs slew rate - supports modern ultra-low-voltage microcontroller peripherals. |
| Input range includes negative rail | Common-mode input extends to VEE (0V), enabling direct connection of ground-referenced transducers (e.g., thermocouples, bridge sensors). |
| Short-circuit protected outputs | Withstands indefinite output short to VCC or VEE without latch-up or parametric shift - enhances reliability in industrial I/O modules. |
Applications
| Portable ECG Monitors | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Amplifying low-amplitude (±1mV), DC-coupled biopotential signals from dry electrodes in handheld medical devices. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier stage with rail-to-rail output driving 12-bit SAR ADC reference buffer. Use Value: ±2.0mV offset and 15V/µs slew rate enable accurate capture of QRS complex morphology without baseline drift or slew-induced distortion. |
Use Scenario: Conditioning analog sensor outputs (temperature, humidity, gas) in solar-charged remote environmental nodes. IC Role / Device Role / Timing Role: Single-supply signal conditioner interfacing 0–3V sensor outputs to 3.3V microcontroller ADC inputs. Use Value: 2.7V minimum supply and 2.0mA quiescent current extend battery life >12 months while maintaining 10MHz bandwidth for anti-aliasing filter implementation. |
| Active Anti-Aliasing Filters | DC Motor Current Sensing |
Use Scenario: Implementing 4th-order Butterworth low-pass filters preceding high-speed ADCs in test equipment. IC Role / Device Role / Timing Role: Unity-gain stable op amp in Sallen-Key topology with 10MHz GBW ensuring flat group delay up to 100kHz cutoff. Use Value: Guaranteed 10MHz bandwidth and 63° phase margin prevent peaking or instability when driving 100pF+ filter capacitors. |
Use Scenario: Amplifying mV-level shunt voltage in 24V DC motor control H-bridge feedback paths. IC Role / Device Role / Timing Role: High-speed current sense amplifier with rail-to-rail output driving comparator threshold inputs. Use Value: 15V/µs slew rate supports accurate reconstruction of PWM-edge transients (<1µs rise time) without slew limiting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-supply, rail-to-rail output op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV321IDBVR | Lower GBW (1MHz), higher input offset (±3mV), but lower supply current (60µA) and wider temp range (−40°C to +125°C). | Optimized for ultra-low-power sensor interfaces where bandwidth <1MHz suffices; unsuitable for >100kHz active filters. | Select LMV321IDBVR only when power budget <100µA dominates over speed requirements; verify offset drift over temperature. |
| TLV2461CDR | Higher GBW (6.4MHz), rail-to-rail I/O, but higher supply current (550µA) and no guaranteed 10MHz performance. | Acceptable for medium-speed signal conditioning (e.g., audio preamps), but cannot replace MAX473CSA in 10MHz-critical servo loops. | Choose TLV2461CDR if rail-to-rail input is mandatory and 6.4MHz bandwidth meets system requirements; confirm stability with target load. |
Compared with LMV321IDBVR and TLV2461CDR, the MAX473CSA uniquely delivers guaranteed 10MHz bandwidth and 15V/µs slew rate in a single-supply, rail-to-rail output configuration - essential for high-fidelity active filtering and fast-settling data acquisition where neither alternative meets the full specification set.
Availability
MAX473CSA is available at Aetrix Electronics and suitable for portable equipment, battery-powered instruments, and signal conditioning systems requiring stable component supply amid legacy design support constraints.
Supply support for MAX473CSA 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 precision, power, and interface applications in industrial, medical, and communications systems.
The MAX473CSA belongs to Maxim's legacy single-supply op amp family engineered for rail-to-rail output performance in low-voltage portable instrumentation - emphasizing speed, precision, and single-supply simplicity over ultra-low power.
FAQ
Is MAX473CSA recommended for new designs?
No, MAX473CSA is Not Recommended for New Designs per Maxim's official documentation. It was manufactured using a discontinued wafer process, and Maxim advises selecting a replacement or second-source alternative. Existing designs may continue using MAX473CSA with full datasheet support, but Aetrix Electronics recommends evaluating LMV321IDBVR or TLV2461CDR for new projects requiring similar functionality.
What is the maximum capacitive load the MAX473CSA can drive stably?
The MAX473CSA maintains stability with up to 20pF capacitive load in parallel with 10kΩ, achieving 63° phase margin. Driving larger capacitance (e.g., >100pF) requires an isolation resistor (e.g., 10Ω–100Ω) in series with the output, as shown in Maxim's Figure 4, to restore phase margin and prevent peaking or oscillation.
Does MAX473CSA support dual-supply operation?
Yes, MAX473CSA supports dual supplies of ±1.35V to ±2.625V. When operated from dual rails, the input common-mode range extends to within 1.9V of each supply, and output swing remains rail-to-rail (±50mV). Bypass each supply independently with 0.1µF ceramic capacitors to maintain PSRR >80dB and channel separation >120dB.
Can the input offset voltage of MAX473CSA be trimmed externally?
Only the MAX473CPA (DIP package) variant supports external offset nulling via pins 1 and 8. The MAX473CSA (SO package) does not implement internal connections for offset trimming - its input offset voltage is fixed at ±2.0mV max (TA = +25°C) and exhibits ±4.0mV max over the full 0°C to +70°C range.
What is the thermal performance of MAX473CSA in 8-pin SO package?
In the 8-pin SO package, MAX473CSA has a thermal resistance θJA of 170°C/W and a maximum continuous power dissipation of 471mW at +70°C ambient (derating 5.88mW/°C above +70°C). Junction temperature must remain ≤+150°C; for continuous 2.0mA operation at 5V, power dissipation is ~10mW - well within safe limits even at +85°C ambient.
MAX473CSA 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:
- 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-SOIC
MAX473CSA FAQ
1.How can I place an order for MAX473CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX473CSA 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 MAX473CSA reliable?
The price and inventory of MAX473CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX473CSA is usually 5 days.
3.What payment methods are accepted for MAX473CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX473CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX473CSA?
MAX473CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX473CSA 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 MAX473CSA?
For technical support, including MAX473CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX473CSA requirements.
6.How does Aetrix verify that MAX473CSA is sourced from the original manufacturer or authorized distributors?
All MAX473CSA 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 MAX473CSA meets industry standards.
7.What is the process for return or replacement of MAX473CSA?
All MAX473CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX473CSA, 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 MAX473CSA part is unused and in its original packaging.
Return procedure for MAX473CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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