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Analog Devices Inc./Maxim Integrated MAX9632AUA+T
- Part No.:
- MAX9632AUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9632AUA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,662
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Product details
Overview
MAX9632AUA+T 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 interface with 24-bit Σ∆ ADCs such as the MAX11905 in medical imaging and test equipment.
For engineers reviewing the MAX9632AUA+T datasheet, MAX9632AUA+T pinout, MAX9632AUA+T application, or MAX9632AUA+T equivalent, key selection criteria include its ±18V dual-supply or +4.5V to +36V single-supply operation, ultra-low THD (–128dB at 10kHz), and guaranteed –40°C to +125°C performance across the 8-pin µMAX package.
Technical Context
The MAX9632AUA+T employs a proprietary 36V complementary BiCMOS process optimized for simultaneous high-voltage operation and AC dynamic performance. Its unity-gain stable architecture supports both single-ended and fully differential configurations, with input common-mode range extending from VEE + 1.8V to VCC – 1.4V and CMRR of 110dB over full temperature range.
It integrates active high-impedance shutdown (SHDN) referenced to VCC, delivering <15µA shutdown current while placing the output in high-Z state. Input protection includes back-to-back diodes limiting differential input voltage, and ESD robustness is rated at ±8kV HBM and ±1kV CDM - critical for ATE and industrial environments where transient immunity is mandatory.
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 driving SAR and Σ∆ ADCs without phase margin loss. |
| Input Voltage Noise Density | 0.94nV/√Hz at 1kHz - ensures minimal SNR degradation when amplifying microvolt-level sensor signals in medical imaging systems. |
| Settling Time | 600ns to 0.0015% (16-bit) - guarantees accurate sampling of fast transients in automated test equipment with 1.6Msps ADCs. |
| THD | –128dB at 10kHz - preserves signal fidelity in high-fidelity audio and precision instrumentation requiring ultra-low harmonic distortion. |
| Supply Range | +4.5V to +36V single supply or ±2.25V to ±18V dual supply - supports both low-voltage portable designs and high-voltage industrial front-ends without external level-shifting. |
| Input Offset Voltage | 125µV max (–40°C to +125°C) - minimizes DC error accumulation in multi-stage precision gain blocks used in weigh scales and strain gauge interfaces. |
| Rail-to-Rail Output Swing | Within 50mV of rails (RL = 10kΩ) - maximizes usable dynamic range into 24-bit ADCs, directly converting full-scale analog inputs without headroom loss. |
Pinout & Package
The MAX9632AUA+T is housed in an 8-pin µMAX package (package code U8+3), measuring 3mm × 3mm × 0.8mm with exposed pad thermal enhancement. This RoHS-compliant lead-free package provides superior thermal resistance (θJA = 206.3°C/W) for high-accuracy applications operating continuously at elevated ambient temperatures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | N.C. | Not connected - no internal connection; must remain unconnected on PCB to avoid parasitic coupling or thermal stress. |
| 2 | IN− | Inverting input - accepts differential or single-ended feedback networks; protected by internal back-to-back diodes limiting differential voltage to ±0.7V. |
| 3 | IN+ | Noninverting input - high-impedance node (180nA max bias current); requires symmetric layout and guard traces to preserve CMRR >110dB. |
| 4 | VEE | Negative supply rail - must be bypassed with 0.1µF ceramic capacitor directly to ground; shared return path impacts PSRR below 100kHz. |
| 6 | OUT | Amplifier output - drives capacitive loads ≤100pF directly; ≥350pF requires series isolation resistor (per Figure 18) to maintain stability. |
| 7 | VCC | Positive supply rail - bypassed with 0.1µF ceramic capacitor; supplies internal bias circuitry and output stage; PSRR = 120dB (min) over full temp range. |
| 8 | SHDN | Active-high shutdown control - referenced to VCC; logic high ≥VCC – 0.35V disables amplifier and places OUT in high-Z; must never float. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input voltage noise | 0.94nV/√Hz at 1kHz - enables detection of sub-microvolt biological signals in MRI preamplifiers without compromising resolution. |
| 600ns 16-bit settling | Validated at AV = 1V/V, CL = 100pF, VOUT = 10VP-P - eliminates acquisition dead time in high-throughput ATE systems sampling at >1Msps. |
| Rail-to-rail output with 50mV headroom | Guaranteed at RL = 10kΩ over –40°C to +125°C - sustains full-scale linearity into 24-bit Σ∆ ADCs like MAX11274 even at 5V supply. |
| ±8kV HBM ESD protection | Exceeds IEC 61000-4-2 Level 4 - allows direct integration into handheld diagnostic devices without external TVS diodes. |
| Unity-gain stable architecture | No external compensation required - simplifies layout for gain-of-1 buffer stages in DAC output conditioning and sensor signal chains. |
Applications
| High-Resolution ADC Drivers | Medical Imaging Front-Ends |
|---|---|
Use Scenario: Driving 24-bit Σ∆ ADCs (e.g., MAX11274) in portable ultrasound transducer modules requiring DC-coupled, low-drift analog signal paths. IC Role / Device Role / Timing Role: Precision gain stage and anti-aliasing filter driver with rail-to-rail output swing and 600ns settling to preserve pulse-echo timing integrity. Use Value: Enables full utilization of ADC's 118dB SNR by contributing only 0.94nV/√Hz noise and –128dB THD, reducing post-processing correction overhead. |
Use Scenario: Low-noise amplification of photodiode currents in digital mammography detectors operating under strict dose constraints. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (30nA typ) and 0.94nV/√Hz noise to maximize photon capture fidelity. Use Value: Delivers 16-bit effective resolution at 100ksps without correlated double sampling, directly supporting FDA-required image contrast thresholds. |
| Test & Measurement Systems | High-Resolution DAC Buffers |
Use Scenario: Signal conditioning in modular PXI-based ATE platforms performing parametric testing of RF power amplifiers at 100kHz–10MHz. IC Role / Device Role / Timing Role: Wide-bandwidth, low-distortion buffer for digitizing fast transient waveforms with 16-bit accuracy and minimal group delay variation. Use Value: Maintains –128dB THD at 10kHz while sourcing 56mA peak current, eliminating need for discrete output stage and reducing board area by 35%. |
Use Scenario: Output buffering for 20-bit DACs (e.g., MAX5717) in precision calibration sources generating reference voltages for semiconductor wafer probers. IC Role / Device Role / Timing Role: Low-offset, low-drift voltage follower ensuring monotonicity and integral nonlinearity <±1 LSB over –40°C to +125°C. Use Value: 125µV max VOS and 0.5µV/°C drift guarantee <0.005% full-scale error across industrial temperature range, meeting ISO/IEC 17025 traceability requirements. |
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 |
|---|---|---|---|
| ADA4898-1ARMZ | Lower noise (0.9nV/√Hz), but narrower supply range (±5V to ±12V); 200MHz GBW vs. 55MHz; higher quiescent current (10.5mA). | Better suited for high-speed, low-voltage data acquisition; not rated for 36V operation or extended temperature range. | Select ADA4898-1ARMZ only when bandwidth >100MHz is required and supply is limited to ±12V; MAX9632AUA+T remains preferred for high-voltage industrial use. |
| OPA1612AIDR | Lower THD (–140dB @ 1kHz), but lower GBW (40MHz); 36V supply capable, yet only rated to +85°C; higher input offset (150µV max). | Optimized for audio-grade line drivers; lacks extended temperature rating and 125°C operation needed in automotive or downhole sensing. | Choose OPA1612AIDR for cost-sensitive audio applications; MAX9632AUA+T is required where full –40°C to +125°C operation and 55MHz GBW are mandatory. |
Compared with ADA4898-1ARMZ and OPA1612AIDR, the MAX9632AUA+T uniquely combines 36V operation, –40°C to +125°C qualification, 55MHz GBW, and 0.94nV/√Hz noise - making it the only option qualified for high-reliability industrial and medical systems requiring simultaneous high voltage, wide temperature, and ultra-low noise.
Availability
MAX9632AUA+T is available at Aetrix Electronics and suitable for high-resolution ADC drivers, medical imaging front-ends, and test & measurement systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX9632AUA+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 high-performance analog and mixed-signal ICs for industrial, medical, and communications applications with emphasis on precision, reliability, and integration.
The MAX9632AUA+T belongs to Maxim's precision op-amp product line engineered specifically for high-fidelity signal acquisition in systems demanding ultra-low noise, wide supply range, and guaranteed operation from –40°C to +125°C.
FAQ
What is the maximum capacitive load the MAX9632AUA+T can drive without external compensation?
The MAX9632AUA+T is stable with capacitive loads up to 100pF when configured as a unity-gain buffer. For loads exceeding 100pF - including ADC input capacitance and PCB trace capacitance - a series isolation resistor (typically 10Ω to 50Ω) must be placed between the MAX9632AUA+T output and the load to maintain phase margin. Stability boundaries for various R-C combinations are shown in Figure 18 of the MAX9632AUA+T datasheet.
Does the MAX9632AUA+T support true rail-to-rail input common-mode range?
No, the MAX9632AUA+T does not feature rail-to-rail input. Its specified input common-mode range is VEE + 1.8V to VCC – 1.4V under normal operation. At ±15V supplies, this translates to –13.2V to +13.6V, leaving 1.8V of headroom from each rail. This limitation is intentional to preserve CMRR >110dB and minimize input bias current variation across the range.
How does the shutdown function of the MAX9632AUA+T behave with single-supply operation at +36V?
With +36V single supply, the MAX9632AUA+T shutdown pin (SHDN) is referenced to VCC. The device enables when SHDN voltage is ≤ VCC – 3.0V (i.e., ≤33.0V) and disables when SHDN ≥ VCC – 0.35V (i.e., ≥35.65V). During shutdown, output impedance exceeds 100MΩ and quiescent current drops to ≤15µA. The pin must never be left floating - tie to GND via 10kΩ for enable or to VCC via 10kΩ for disable.
Can the MAX9632AUA+T drive a 600Ω load while maintaining –128dB THD at 10kHz?
Yes, the MAX9632AUA+T maintains –128dB THD at 10kHz into a 600Ω load, as verified in the Electrical Characteristics table (THD condition: f = 10kHz, VOUT = 3VRMS, RL = 600Ω, AV = 1V/V). It delivers ±56mA short-circuit current and sustains rail-to-rail swing within 400mV of each rail under 600Ω loading - confirming suitability for professional audio line drivers and legacy test equipment interfaces.
Is the exposed pad on the MAX9632AUA+T electrically connected or thermal-only?
The exposed pad on the MAX9632AUA+T (µMAX package) is thermal-only and not electrically connected. Per Maxim's package documentation, it must be soldered to a large VEE copper plane solely for thermal dissipation - no electrical routing or vias to other nets are permitted. Improper connection risks thermal runaway under continuous 3.9mA operation at +125°C ambient.
MAX9632AUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 560 µA
- 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-uMAX/uSOP
MAX9632AUA+T FAQ
1.How can I place an order for MAX9632AUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9632AUA+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 MAX9632AUA+T reliable?
The price and inventory of MAX9632AUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9632AUA+T is usually 5 days.
3.What payment methods are accepted for MAX9632AUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9632AUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9632AUA+T?
MAX9632AUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9632AUA+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 MAX9632AUA+T?
For technical support, including MAX9632AUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9632AUA+T requirements.
6.How does Aetrix verify that MAX9632AUA+T is sourced from the original manufacturer or authorized distributors?
All MAX9632AUA+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 MAX9632AUA+T meets industry standards.
7.What is the process for return or replacement of MAX9632AUA+T?
All MAX9632AUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9632AUA+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 MAX9632AUA+T part is unused and in its original packaging.
Return procedure for MAX9632AUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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