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Analog Devices Inc./Maxim Integrated MAX9632ASA+
- Part No.:
- MAX9632ASA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX9632ASA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,708
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Product details
Overview
MAX9632ASA+ from Maxim Integrated is a precision, low-noise, wide-band operational amplifier designed for high-resolution signal conditioning in demanding analog front-ends. It delivers 55MHz gain-bandwidth, 0.94nV/√Hz input voltage noise, 600ns settling time to 16-bit accuracy, and rail-to-rail output swing - enabling direct drive of 24-bit Σ∆ ADCs such as the MAX11905 in medical imaging and test equipment.
For engineers reviewing the MAX9632ASA+ datasheet, MAX9632ASA+ pinout, MAX9632ASA+ application, or MAX9632ASA+ equivalent, key selection criteria include its ±18V dual-supply capability, ultra-low THD (-128dB at 10kHz), 125µV max input offset voltage, and SO-8 package compatibility with high-voltage, low-distortion acquisition systems.
Technical Context
The MAX9632ASA+ employs a proprietary 36V complementary BiCMOS process optimized for simultaneous high-voltage operation and fast AC performance. Its unity-gain stable architecture supports single-supply (4.5V–36V) or dual-supply (±2.25V–±18V) configurations while maintaining sub-1nV/√Hz noise and <1µV/°C drift.
Input protection includes back-to-back diodes limiting differential input voltage, and shutdown control referenced to VCC enables high-impedance output state with <15µA shutdown current. The rail-to-rail output stage delivers 50mV rail margin into 10kΩ and sustains stability with ≤100pF capacitive load without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 55MHz - enables stable closed-loop operation up to 10MHz with moderate gain, suitable for anti-aliasing and reconstruction filters. |
| Input Voltage Noise Density | 0.94nV/√Hz at 1kHz - preserves SNR when driving 24-bit ADCs with full-scale inputs ≥2VPP. |
| Settling Time | 600ns to 0.0015% (16-bit) - ensures accurate sampling in high-speed data acquisition with ≥1.6Msps ADCs. |
| Input Offset Voltage | 125µV (max) - minimizes DC error in precision sensor interfaces and calibrated measurement paths. |
| THD | -128dB at 10kHz - maintains fidelity in audio-grade instrumentation and spectral analysis applications. |
| Supply Range | +4.5V to +36V single supply or ±18V dual supply - supports industrial sensors, isolated power domains, and legacy ±15V systems. |
| Output Swing | Rail-to-rail, within 50mV of rails (10kΩ load) - maximizes dynamic range for low-voltage ADCs without level-shifting circuitry. |
Pinout & Package
MAX9632ASA+ is housed in an 8-pin SO (Small Outline) package with exposed pad not present (non-EP variant). Pin 1 is located at the top-left corner adjacent to the index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | N.C. | No internal connection - must remain unconnected; no routing or grounding required. |
| 2 | IN- | Inverting input - accepts feedback network or differential signal path; high common-mode rejection (110dB min). |
| 3 | IN+ | Noninverting input - connects to sensor, reference, or signal source; protected by internal back-to-back diodes. |
| 4 | VEE | Negative supply rail - requires local 0.1µF ceramic bypass to ground for stability and noise suppression. |
| 6 | OUT | Amplifier output - drives ADC input, DAC buffer, or active filter; capable of sourcing/sinking 56mA. |
| 7 | VCC | Positive supply rail - requires local 0.1µF ceramic bypass to ground; shutdown threshold referenced to this pin. |
| 8 | SHDN | Active-high shutdown control - logic high (>VCC - 0.35V) disables amplifier and places OUT in high-Z state. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 0.94nV/√Hz at 1kHz - enables detection of µV-level signals in EEG, ultrasound preamplifiers, and strain-gauge bridges. |
| High CMRR & PSRR | 110dB CMRR and 120dB PSRR over full temperature range - rejects interference from noisy digital supplies and shared ground paths. |
| Rail-to-rail output with low distortion | THD = -128dB at 10kHz, 3VRMS, 600Ω load - preserves harmonic integrity in spectrum analyzers and ATE stimulus generation. |
| Wide supply flexibility | Operates from +4.5V to +36V single supply or ±2.25V to ±18V dual supply - eliminates need for separate ±15V rails in mixed-signal industrial modules. |
| ESD robustness | ±8kV HBM / ±1kV CDM - withstands handling and board-level ESD events without latch-up or parametric shift. |
Applications
| High-Resolution ADC Drivers | Medical Imaging Front-Ends |
|---|---|
Use Scenario: Driving 24-bit Σ∆ ADCs (e.g., MAX11905) in portable ultrasound or MRI signal chains where SNR > 110dB is required. IC Role / Device Role / Timing Role: Precision buffer and anti-aliasing filter driver with minimal added noise and distortion. Use Value: 0.94nV/√Hz noise and -128dB THD preserve full ENOB of 24-bit converters without requiring gain-stage trimming or post-processing calibration. |
Use Scenario: Low-noise amplification of photodiode or piezoelectric transducer outputs in CT/PET detector modules. IC Role / Device Role / Timing Role: First-stage transimpedance or differential gain amplifier with fast settling for pulse-height analysis. Use Value: 600ns settling to 16-bit accuracy enables ≥1.6Msps sampling rates while maintaining linearity across ±10V input ranges. |
| Test & Measurement Systems | High-Resolution DAC Buffers |
Use Scenario: Output stage of programmable voltage sources and arbitrary waveform generators requiring <0.01% THD up to 100kHz. IC Role / Device Role / Timing Role: High-fidelity output buffer with rail-to-rail swing and low output impedance. Use Value: 30V/µs slew rate and 55MHz GBW support clean 10VP-P sine waves at 10kHz without slewing-induced distortion. |
Use Scenario: Buffering high-accuracy DACs (e.g., MAX5717) in calibration equipment and metrology instruments. IC Role / Device Role / Timing Role: DC-accurate, low-drift output amplifier that maintains monotonicity and integral nonlinearity. Use Value: 125µV max input offset and 0.5µV/°C drift ensure <1LSB error over -40°C to +125°C in 20-bit DAC systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision wide-band amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA1612AIDR | Lower noise (1.1nV/√Hz), lower GBW (40MHz), higher quiescent current (3.6mA vs. 3.9mA), SO-8 package. | Optimized for audio-grade line drivers; lacks 36V supply range and 125°C rating. | Select for audio-focused designs where 36V operation and extended temperature are unnecessary. |
| ADA4898-1ARZ | Higher noise (1.1nV/√Hz), higher GBW (65MHz), higher supply current (11.5mA), SO-8 package. | Targeted at high-speed oscilloscope front-ends; no shutdown function and narrower supply range (±5V to ±15V). | Select when maximum bandwidth is critical and power budget allows >2× quiescent current. |
Compared with OPA1612AIDR and ADA4898-1ARZ, the MAX9632ASA+ uniquely combines 36V operation, 125°C rating, integrated shutdown, and sub-1nV/√Hz noise in an SO-8 package - making it optimal for industrial, medical, and ATE systems requiring wide supply tolerance and long-term parametric stability.
Availability
MAX9632ASA+ is available at Aetrix Electronics and suitable for high-resolution ADC drivers, medical imaging front-ends, test and measurement systems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX9632ASA+ 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, mixed-signal, and power-management ICs for industrial, medical, and communications applications.
The MAX9632ASA+ belongs to Maxim's precision op-amp product line, engineered specifically for wide-supply, low-noise, high-bandwidth signal acquisition in harsh environments and high-reliability systems.
FAQ
What is the maximum capacitive load the MAX9632ASA+ can drive without external compensation?
The MAX9632ASA+ remains stable with up to 100pF capacitive load when configured in unity-gain configuration. For loads exceeding 100pF, an isolation resistor (typically 10Ω–100Ω) placed in series with the output improves phase margin and prevents oscillation - as validated in the device's Typical Operating Characteristics (Figure MAX9632 toc18). This behavior is confirmed in the Electrical Characteristics table under "Capacitive Loading" parameter.
Does the MAX9632ASA+ support true rail-to-rail input operation?
No, the MAX9632ASA+ does not feature rail-to-rail input. Its input common-mode range extends from (VEE + 1.8V) to (VCC – 1.4V), as specified in the Electrical Characteristics table. This means with ±15V supplies, inputs must stay within -13.2V to +13.6V. However, its rail-to-rail output stage delivers swing within 50mV of either rail under 10kΩ load - a key enabler for maximizing ADC dynamic range.
What is the shutdown current consumption of the MAX9632ASA+?
The MAX9632ASA+ draws ≤15µA shutdown current when the SHDN pin is driven high (>VCC – 0.35V), placing the amplifier in a low-power, high-impedance output state. This value is guaranteed across the full -40°C to +125°C operating temperature range and is explicitly listed in the Electrical Characteristics table under "Shutdown Current" (ISHDN).
Can the MAX9632ASA+ operate from a single 5V supply?
Yes, the MAX9632ASA+ is fully functional with a single +5V supply (VCC = +5V, VEE = GND), as confirmed by its guaranteed 4.5V minimum supply voltage in the Absolute Maximum Ratings and Electrical Characteristics tables. Performance metrics including GBW, noise, and THD remain valid at 5V, enabling use in battery-powered portable instrumentation where low-voltage operation is essential.
Is the MAX9632ASA+ pin-compatible with other variants like MAX9632ATA+ or MAX9632AUA+?
Yes, all MAX9632 variants - including MAX9632ASA+, MAX9632ATA+, and MAX9632AUA+ - share identical 8-pin functionality and pinout per the Pin Configuration diagram. Differences are strictly in package type (SO, TDFN-EP, µMAX) and thermal characteristics; no changes to PCB layout or schematic are required when substituting between them, provided mechanical and thermal constraints are satisfied.
MAX9632ASA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 55 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 3.9mA
- Current - Output / Channel:
- 56 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX9632ASA+ FAQ
1.How can I place an order for MAX9632ASA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9632ASA+ 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 MAX9632ASA+ reliable?
The price and inventory of MAX9632ASA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9632ASA+ is usually 5 days.
3.What payment methods are accepted for MAX9632ASA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9632ASA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9632ASA+?
MAX9632ASA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9632ASA+ 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 MAX9632ASA+?
For technical support, including MAX9632ASA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9632ASA+ requirements.
6.How does Aetrix verify that MAX9632ASA+ is sourced from the original manufacturer or authorized distributors?
All MAX9632ASA+ 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 MAX9632ASA+ meets industry standards.
7.What is the process for return or replacement of MAX9632ASA+?
All MAX9632ASA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9632ASA+, 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 MAX9632ASA+ part is unused and in its original packaging.
Return procedure for MAX9632ASA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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