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Texas Instruments OPA632U
- Part No.:
- OPA632U
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA632U.pdf
- Description:
- IC OPAMP VFB 68MHZ SGL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:463
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Product details
Overview
OPA632U from Texas Instruments is a dual-channel, high-speed, voltage-feedback operational amplifier with integrated disable functionality, designed for single-supply operation from +3V to +10V. It delivers 75MHz small-signal bandwidth at G = +2, 100V/µs slew rate, and 4.8V output swing on +5V supply-enabling precision ADC input buffering and video line driving in portable consumer electronics.
For engineers reviewing the OPA632U datasheet, OPA632U pinout, OPA632U application, or OPA632U equivalent, this page provides verified specifications, SO-8 package layout, disable timing behavior (60ns enable / 100ns disable), thermal resistance (125°C/W), and real-world alternatives for low-power, single-supply signal conditioning designs.
Technical Context
The OPA632U uses complementary common-emitter output stage architecture to achieve rail-to-rail output swing (within 30mV of ground and 130mV of +VS) while maintaining unity-gain stability. Its internal disable circuit reduces quiescent current to zero when DIS pin is driven HIGH, enabling dynamic power management in battery-powered systems.
It supports DC-coupled configurations with input range extending below ground and to within 1V of the positive supply. Gain bandwidth product remains stable across supply voltages (+3V to +10V), with only minor reduction in bandwidth at lower supplies due to constant quiescent current biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 75 MHz at +5V supply - enables high-fidelity video and ADC interface up to 20Msps sampling rates |
| Slew Rate | 100 V/µs - supports fast transient response for pulse and imaging applications without distortion |
| Input Voltage Noise | 6.0 nV/√Hz - preserves SNR in wide-dynamic-range signal chains such as CCD imaging channels |
| Output Swing (RL = 1kΩ, +5V) | 0.03V to 4.87V - delivers >4.8V p-p output usable for 10-bit ADC drivers like ADS901 |
| Disable Quiescent Current | 0 µA typical - eliminates static power draw during system sleep modes |
| Enable/Disable Time | 60 ns / 100 ns - allows sub-100ns power-state transitions for time-critical sensor or data-acquisition sequencing |
| Supply Range | +3V to +10V - supports both low-voltage portable and industrial +5V/+10V systems without redesign |
Pinout & Package
OPA632U is housed in an industry-standard SO-8 surface-mount package (Package Drawing 182), with thermal resistance θJA = 125°C/W. Pin 1 is NC; Pin 2 is Inverting Input; Pin 3 is Non-Inverting Input; Pin 4 is GND; Pin 5 is DIS (disable control); Pin 6 is +VS; Pin 7 is Output; Pin 8 is NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, Pin 8 | No Connect | Unused; must be left floating or tied to GND per layout best practice |
| Pin 2 | Inverting Input | Differential input node; requires matched impedance to Pin 3 for optimal CMRR |
| Pin 3 | Non-Inverting Input | DC-biased via 1.5kΩ resistors in typical level-shift circuits; accepts signals down to –0.5V |
| Pin 4 | GND | Power and signal reference plane; must be low-inductance connection to minimize noise coupling |
| Pin 5 | DIS | Active-HIGH disable control; logic HIGH (>3.7V on +5V supply) forces output high-Z and quiescent current to zero |
| Pin 6 | +VS | Positive supply rail; decoupling capacitor (0.1µF) required adjacent to pin |
| Pin 7 | Output | Complementary emitter-follower output; drives 150Ω loads to within 130mV of +VS and 30mV of GND |
Key Features
| Feature | Design Value |
|---|---|
| Zero-power disable | Quiescent current drops to 0 µA when DIS pin is HIGH - enables true power gating in battery-operated devices |
| Rail-to-rail output swing | Output reaches within 30 mV of GND and 130 mV of +VS - maximizes dynamic range on single +3V/+5V supplies |
| Input range includes ground | Accepts inputs down to –0.5 V - eliminates need for external level-shifting in DC-coupled sensor interfaces |
| Low distortion at reduced swing | Harmonic distortion improves as output amplitude decreases - ideal for variable-gain video and ultrasound front ends |
| Stable on +3V supply | Maintains 61 MHz bandwidth and 95 V/µs slew rate at +3V - supports modern ultra-low-voltage portable systems |
Applications
| Single-Supply ADC Input Buffers | Single-Supply Video Line Drivers |
|---|---|
Use Scenario: Driving the analog input of a 10-bit, 20Msps ADC (e.g., ADS901) from a 0–0.5V sensor signal under +3V supply constraints. IC Role / Device Role / Timing Role: Precision DC-coupled buffer with level-shifting and gain-of-2 amplification; provides 1–2V output compliant with ADC input range. Use Value: Enables full-scale utilization of ADC dynamic range while maintaining <0.5% differential gain error for NTSC video compatibility. | Use Scenario: Transmitting composite video signals over 75Ω coaxial cable in portable DVD players or digital camcorders. IC Role / Device Role / Timing Role: High-current line driver with 55mA sourcing/sinking capability and 75MHz bandwidth to preserve luminance/chrominance integrity. Use Value: Delivers <1.2° NTSC differential phase error and <0.5% differential gain error - meets broadcast-quality video spec without external clamping. |
| CCD Imaging Channels | Low-Power Ultrasound Receivers |
Use Scenario: Amplifying low-noise, low-amplitude pixel charge outputs from linear CCD arrays in handheld scanners or medical imagers. IC Role / Device Role / Timing Role: Low-noise transimpedance or voltage gain stage with 6nV/√Hz input voltage noise and wide input common-mode range. Use Value: Preserves >70dB SNR across 1–5MHz CCD readout bandwidth while operating from +3.3V supply. | Use Scenario: Conditioning echo return signals in portable ultrasound probes where power budget is limited to <10mW per channel. IC Role / Device Role / Timing Role: Variable-gain, low-distortion signal conditioner with disable capability synchronized to transmit/receive cycles. Use Value: Reduces average power by >95% during transmit phase using 100ns-disable timing - extends probe battery life significantly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, single-supply op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA632N | SOT23-6 package (θJA = 150°C/W), same electrical specs; smaller footprint but higher thermal resistance | Better suited for space-constrained PCBs where thermal margin allows | Select OPA632N only if board area is critical and ambient temperature stays ≤60°C |
| OPA634U | Higher full-power bandwidth (120MHz), no disable function, 7.5mA quiescent current vs 6mA | Preferred for fixed-power, highest-fidelity video or RF IF stages where disable is unnecessary | Choose OPA634U when bandwidth >90MHz is required and power gating is not needed |
Compared with OPA632N and OPA634U, the OPA632U uniquely balances SO-8 manufacturability, 125°C/W thermal performance, and zero-power disable-making it optimal for production-ready, thermally robust, battery-aware designs requiring rapid power-state transitions.
Availability
OPA632U is available at Aetrix Electronics and suitable for single-supply ADC input buffers, portable video line drivers, and low-power ultrasound receivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for OPA632U 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in high-performance op amps and precision signal chain solutions.
The OPA632U belongs to TI's OPA63x family of low-power, high-speed voltage-feedback amplifiers-designed specifically for single-supply, portable, and imaging applications demanding wide bandwidth, rail-to-rail output, and dynamic power control.
FAQ
What is the maximum supply voltage for the OPA632U?
The OPA632U supports a maximum operating voltage of +10.5V DC, with absolute maximum rating at +11V. Operation at +10V is fully characterized and guaranteed across –40°C to +85°C, delivering 6.9mA max quiescent current and 34MHz bandwidth at G = +10. Exceeding +10.5V risks permanent damage per Absolute Maximum Ratings.
Does the OPA632U require external compensation for stability?
No, the OPA632U is unity-gain stable and internally compensated for resistive loads up to 150Ω. It exhibits a slightly peaked response at G = +2 (typical 5dB peaking), which is intentional to maximize bandwidth. For flat response at low gains, add RC compensation (e.g., 40.2Ω in series with feedback) as shown in Figure 4 of SBOS066A.
How does the DIS pin behave during power-up?
The DIS pin of the OPA632U is active-HIGH and defaults to disabled (HIGH) only if externally pulled up; it has no internal pull-up. During power-up, the device powers on enabled (output active) unless the DIS net is actively held HIGH by system logic. Enable time is 60ns, so output becomes valid within 60ns after DIS transitions LOW.
Can the OPA632U drive capacitive loads directly?
The OPA632U can drive up to 100pF capacitive load stably without series resistance. For larger loads (e.g., 1000pF), a series resistor (RS ≈ 2.5Ω at +5V) between output and load restores phase margin, as documented in Figure 8 of SBOS066A. This RS value scales with supply voltage and must be verified per actual layout parasitics.
What is the input common-mode voltage range for the OPA632U at +3V supply?
At +3V supply, the OPA632U input common-mode voltage range is specified from –0.5V to +1.3V (min), allowing signals to extend 0.5V below ground and up to 1.7V below +VS. This enables direct interfacing with bipolar sensors or AC-coupled sources without level-shifting circuitry in many portable applications.
OPA632U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SpeedPlus™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 100V/µs
- Gain Bandwidth Product:
- 68 MHz
- -3db Bandwidth:
- 75 MHz
- Current - Input Bias:
- 11 µA
- Voltage - Input Offset:
- 2.5 mV
- Current - Supply:
- 6mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA632U FAQ
1.How can I place an order for OPA632U through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA632U 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 OPA632U reliable?
The price and inventory of OPA632U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA632U is usually 5 days.
3.What payment methods are accepted for OPA632U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA632U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA632U?
OPA632U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA632U 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 OPA632U?
For technical support, including OPA632U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA632U requirements.
6.How does Aetrix verify that OPA632U is sourced from the original manufacturer or authorized distributors?
All OPA632U 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 OPA632U meets industry standards.
7.What is the process for return or replacement of OPA632U?
All OPA632U units undergo pre-shipment inspection (PSI). If there is an issue with OPA632U, 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 OPA632U part is unused and in its original packaging.
Return procedure for OPA632U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA632U Tags
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LM358DT
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LM358DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM2902DR
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LM358P
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