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Texas Instruments OPA2322AIDRGT
- Part No.:
- OPA2322AIDRGT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
OPA2322AIDRGT.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,044
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Product details
Overview
OPA2322AIDRGT from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-noise, low-power, single-supply signal conditioning. It delivers 20 MHz gain bandwidth, 8.5 nV/√Hz input voltage noise at 1 kHz, 10 V/μs slew rate, 1.5 mA per channel quiescent current, and operates from 1.8 V to 5.5 V supply. It is used in precision sensor front-ends and consumer audio line drivers where distortion and power efficiency are critical.
For engineers reviewing the OPA2322AIDRGT datasheet, OPA2322AIDRGT pinout, OPA2322AIDRGT application, or OPA2322AIDRGT equivalent, key selection criteria include its rail-to-rail I/O swing (≤20 mV from rails), low THD+N (0.0005% at 10 kHz), shutdown capability (0.1 μA/ch), offset voltage ≤2 mV, and guaranteed operation from –40°C to +125°C in VSSOP-8 packaging.
Technical Context
The OPA2322AIDRGT implements a zero-crossover rail-to-rail input stage that eliminates crossover distortion in single-supply configurations. Its CMOS input architecture achieves ultra-low input bias current (±0.2 pA typ) and high open-loop gain (100–130 dB), enabling high-precision DC-coupled amplification without significant error accumulation.
Internally compensated for unity-gain stability, it drives capacitive loads up to 50 pF while maintaining phase margin ≥47°. The dual-channel layout supports independent signal paths with 130 dB channel separation at 1 kHz, making it suitable for stereo audio or differential sensor pair processing without crosstalk-induced measurement error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 20 MHz - enables stable closed-loop gain of ≥10 at 2 MHz, suitable for anti-aliasing filters and wideband sensor interfaces. |
| Input Voltage Noise | 8.5 nV/√Hz at 1 kHz - ensures minimal added noise in µV-level sensor signal amplification (e.g., thermopiles, strain gauges). |
| Slew Rate | 10 V/μs - supports clean 2-V step response in ≤0.32 µs (0.01% settling), critical for fast transient detection in control loops. |
| Supply Current per Channel | 1.5 mA (typ) at 5.5 V - allows dual-channel operation under 3.3 V or 5 V rails while staying within 100-mW system power budgets. |
| Offset Voltage | 2 mV (max) - guarantees ≤200 µV output error in unity-gain buffer configuration with 100 mV input, sufficient for 12-bit ADC interfacing. |
| Common-Mode Input Range | (V−) − 0.1 V to (V+) + 0.1 V - fully supports rail-to-rail input with 1.8 V single supply, eliminating level-shifting circuitry. |
| Output Voltage Swing | Within 20 mV of both rails (RL = 10 kΩ) - delivers full dynamic range to downstream ADCs or DACs without headroom loss. |
Pinout & Package
OPA2322AIDRGT is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size and exposed thermal pad (connected to V−). This thermally enhanced package supports continuous operation at +125°C ambient when properly soldered to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Output, Channel A | Delivers amplified signal from Channel A; capable of sourcing/sinking ±65 mA short-circuit current. |
| 2: –IN A | Inverting Input, Channel A | High-impedance CMOS node (±0.2 pA bias current); accepts signals down to V− − 0.1 V. |
| 3: +IN A | Noninverting Input, Channel A | Matches –IN A in voltage range and bias; used for unity-gain buffers or noninverting amplifiers. |
| 4: V− | Negative Supply Rail | Reference for both channels; thermal pad must be connected to this net for optimal thermal performance. |
| 5: –IN B | Inverting Input, Channel B | Independent input for second channel; identical electrical specs to Channel A inputs. |
| 6: +IN B | Noninverting Input, Channel B | Enables dual-channel parallel or differential configurations without shared reference constraints. |
| 7: OUT B | Output, Channel B | Electrically isolated from OUT A; 130 dB channel separation prevents crosstalk in stereo or dual-sensor systems. |
| 8: V+ | Positive Supply Rail | Accepts 1.8 V to 5.5 V; internal regulation ensures consistent performance across full voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Operates with input common-mode range extending 0.1 V beyond supply rails and output swing within 20 mV of both rails - eliminates need for level shifters in 1.8–5.5 V systems. |
| Low 1/f Noise | 2.8 µVPP integrated input voltage noise (0.1 Hz to 10 Hz) - preserves signal integrity in DC-coupled applications like weigh scales and medical ECG front-ends. |
| Ultra-Low Input Bias Current | ±0.2 pA typical at 25°C - minimizes voltage error across high-impedance sources (e.g., pH electrodes, piezoelectric sensors). |
| Shutdown Mode | 0.1 µA per channel quiescent current when SHDN pins asserted - not applicable to OPA2322AIDRGT (non-S variant), but confirms family-level low-power design intent. |
| Unity-Gain Stable | No external compensation required for G ≥ 1 configurations - simplifies PCB layout and reduces BOM count in buffer and gain-of-1 applications. |
Applications
| Industrial Sensor Interface | Consumer Audio Line Driver |
|---|---|
Use Scenario: Amplifying low-level outputs from RTD, thermistor, or bridge-based pressure sensors in programmable logic controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with rail-to-rail input to maximize ADC utilization and minimize external gain stages. Use Value: 8.5 nV/√Hz noise and ≤2 mV offset ensure <1°C temperature measurement error over –40°C to +125°C without calibration. |
Use Scenario: Driving 10-kΩ line inputs in portable Bluetooth speakers and USB-C DAC/headphone amps. IC Role / Device Role / Timing Role: Low-distortion, single-supply headphone buffer delivering 2-VPP signal with 0.0005% THD+N at 10 kHz. Use Value: Rail-to-rail output swing preserves full dynamic range into AC-coupled loads, eliminating DC-blocking capacitors and associated bass roll-off. |
| Multi-Pole Active Filter | Control-Loop Amplifier |
Use Scenario: Implementing 4th-order low-pass filtering in motor current sensing or vibration monitoring subsystems. IC Role / Device Role / Timing Role: Dual-channel op-amp configured as cascaded Sallen-Key stages with matched gain-bandwidth and phase response. Use Value: 20 MHz GBP and 10 V/μs slew rate support filter cutoff frequencies up to 200 kHz with <0.1 dB passband ripple and monotonic group delay. |
Use Scenario: Closed-loop error amplification in DC-DC converter feedback paths and servo motor position controllers. IC Role / Device Role / Timing Role: High-speed comparator replacement or integrator core with fast overload recovery (<100 ns) and stable phase margin. Use Value: 47° phase margin at 50 pF load ensures stable loop behavior without external compensation, reducing design iteration time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Chopper-stabilized architecture; 0.05 µV/°C drift vs. OPA2322AIDRGT's 1.8 µV/°C; higher 1/f noise (0.8 µVPP). | Better DC accuracy for long-term drift-sensitive applications (e.g., precision weight scales); less suitable for wideband audio due to chopper ripple. | Select OPA2333AIDR when offset drift <0.1 µV/°C is mandatory; choose OPA2322AIDRGT when bandwidth >10 MHz and low broadband noise are prioritized. |
| MCP6V82-E/SN | Zero-drift design; 12 MHz GBP, 5 V/μs slew rate, 1.6 mA/ch supply current; lower noise (7.9 nV/√Hz) but narrower bandwidth. | Optimized for micro-power, high-precision DC applications (e.g., battery-powered gas sensors); insufficient slew for 10-kHz audio full-scale swings. | Choose MCP6V82-E/SN for sub-2-mA total system power with <10 µV offset; retain OPA2322AIDRGT when 20-MHz bandwidth and 10-V/μs slew are required. |
Compared with OPA2322AIDRGT, OPA2333AIDR offers superior DC stability but sacrifices bandwidth and introduces switching artifacts, while MCP6V82-E/SN trades 40% lower bandwidth and 50% slower slew for lower drift-making OPA2322AIDRGT the optimal choice for wideband, low-noise, rail-to-rail signal conditioning where moderate DC precision suffices.
Availability
OPA2322AIDRGT is available at Aetrix Electronics and suitable for industrial sensor interface, consumer audio line driver, multi-pole active filter, and control-loop amplifier applications requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for OPA2322AIDRGT 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 precision amplifiers and signal chain solutions.
The OPAx322x product line was designed for low-noise, low-power, rail-to-rail operational amplification in single-supply systems - targeting sensor signal conditioning, audio, and communications applications where power efficiency and signal fidelity are jointly critical.
FAQ
What is the maximum operating temperature range for the OPA2322AIDRGT?
The OPA2322AIDRGT is specified for continuous operation from –40°C to +125°C ambient temperature. This extended industrial temperature range is validated per TI's production testing and thermal characterization data, ensuring reliable performance in harsh environments such as motor control enclosures or outdoor instrumentation housings. The VSSOP-8 package's thermal metrics (RθJA = 50.6°C/W) support this rating when mounted on standard 2-layer PCBs with adequate copper area.
Does the OPA2322AIDRGT include a shutdown feature?
No, the OPA2322AIDRGT does not include a shutdown function. It is the standard dual-channel version of the family; shutdown capability is only present in the "S" variants (e.g., OPA2322S). The OPA2322AIDRGT draws 1.5 mA per channel continuously under recommended operating conditions and lacks dedicated SHDN pins. For power-gated applications, external FET switching of the V+ rail or use of the OPA2322SIDGSR is required.
What is the typical input bias current of the OPA2322AIDRGT at 25°C?
The typical input bias current of the OPA2322AIDRGT is ±0.2 pA at 25°C, as confirmed in the Electrical Characteristics table of the SBOS538F datasheet. This ultra-low value results from its CMOS input stage and enables accurate amplification of signals from high-impedance sources such as photodiodes, piezoelectric transducers, or pH electrodes without significant input loading error.
Can the OPA2322AIDRGT drive a 600-Ω load at 10 kHz with low distortion?
Yes, the OPA2322AIDRGT delivers 0.0011% THD+N when driving a 600-Ω load at 10 kHz with 2-VPP output, as measured per the datasheet's Electrical Characteristics table. Its 10 V/μs slew rate and rail-to-rail output stage ensure full-swing capability into low-impedance loads without clipping or slew-induced distortion, making it suitable for professional audio line outputs and test equipment signal generation.
Is the OPA2322AIDRGT unity-gain stable?
Yes, the OPA2322AIDRGT is internally compensated for unity-gain stability. It maintains ≥47° phase margin with a 50-pF capacitive load at 5 V supply, as verified in the datasheet's Electrical Characteristics and Typical Characteristics sections. No external compensation components are required for G = +1 configurations, simplifying design in voltage follower, active filter, and buffer applications.
OPA2322AIDRGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 1.6mA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
OPA2322AIDRGT FAQ
1.How can I place an order for OPA2322AIDRGT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2322AIDRGT 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 OPA2322AIDRGT reliable?
The price and inventory of OPA2322AIDRGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2322AIDRGT is usually 5 days.
3.What payment methods are accepted for OPA2322AIDRGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2322AIDRGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2322AIDRGT?
OPA2322AIDRGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2322AIDRGT 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 OPA2322AIDRGT?
For technical support, including OPA2322AIDRGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2322AIDRGT requirements.
6.How does Aetrix verify that OPA2322AIDRGT is sourced from the original manufacturer or authorized distributors?
All OPA2322AIDRGT 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 OPA2322AIDRGT meets industry standards.
7.What is the process for return or replacement of OPA2322AIDRGT?
All OPA2322AIDRGT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2322AIDRGT, 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 OPA2322AIDRGT part is unused and in its original packaging.
Return procedure for OPA2322AIDRGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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