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Texas Instruments OPA2322AIDR
- Part No.:
- OPA2322AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2322AIDR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:913
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Product details
Overview
OPA2322AIDR 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, and 10 V/μs slew rate, operating from 1.8 V to 5.5 V supply. It is widely used in sensor front-ends and consumer audio line drivers where precision, speed, and power efficiency are critical.
For engineers reviewing the OPA2322AIDR datasheet, OPA2322AIDR pinout, OPA2322AIDR application, or OPA2322AIDR equivalent, key selection criteria include its 2 mV max offset voltage, 1.5 mA/ch quiescent current, shutdown capability (0.1 μA/ch), rail-to-rail I/O swing, and SOIC-8 package compatibility with industrial temperature range (–40°C to +125°C).
Technical Context
The OPA2322AIDR implements a zero-crossover rail-to-rail input stage that eliminates distortion near supply rails, enabling accurate amplification of signals spanning the full supply range. Its CMOS input architecture provides ultra-low input bias current (±0.2 pA typ) and high open-loop gain (130 dB typ), supporting high-impedance sensor interfaces without loading.
Internally compensated for unity-gain stability, it drives capacitive loads up to 50 pF while maintaining phase margin ≥47°. The dual-channel architecture shares no internal coupling-channel separation exceeds 130 dB at 1 kHz-making it suitable for independent signal paths in multi-channel systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 20 MHz - supports stable closed-loop gain ≥10 at 2 MHz, ideal for anti-aliasing and active filter stages. |
| Input Voltage Noise | 8.5 nV/√Hz at 1 kHz - enables high-gain amplification of microvolt-level sensor outputs without significant noise degradation. |
| Slew Rate | 10 V/μs - ensures faithful reproduction of fast transients (e.g., pulse-width modulated audio or encoder signals) without slew-induced distortion. |
| Offset Voltage (max) | 2 mV - guarantees ≤20 mV output error at G = 10, reducing calibration burden in precision DC-coupled measurement paths. |
| Supply Current / Channel | 1.5 mA/ch at 25°C - allows dual-channel operation under 3.3 V with <5 mW total quiescent power, suitable for battery-powered instrumentation. |
| Shutdown Current | 0.1 μA/ch - reduces system standby power by >99.9% per channel, critical for duty-cycled sensor nodes. |
| Rail-to-Rail I/O | Swings within 20 mV of both rails (10 mV typ) - maximizes dynamic range in 1.8–5.5 V single-supply systems without level-shifting circuitry. |
Pinout & Package
OPA2322AIDR is housed in an 8-pin SOIC package (body size 4.90 mm × 3.91 mm) with exposed thermal pad connected to V–. Pin functions are electrically isolated per channel and fully specified per TI SBOS538F Rev F.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; capable of ±65 mA short-circuit current and rail-to-rail swing into 10 kΩ. |
| 2 | –IN A | Inverting input, channel A - high-impedance CMOS node (±0.2 pA bias current); accepts common-mode voltages from (V–) – 0.1 V to (V+) + 0.1 V. |
| 3 | +IN A | Noninverting input, channel A - identical electrical characteristics to –IN A; differential input capacitance is 5 pF. |
| 4 | V– | Negative supply terminal - reference for both channels; thermal pad must be soldered to PCB ground plane for thermal performance. |
| 5 | +IN B | Noninverting input, channel B - independent of channel A; no crosstalk (130 dB channel separation at 1 kHz). |
| 6 | –IN B | Inverting input, channel B - matches channel A specs; supports same input voltage range and bias current. |
| 7 | OUT B | Amplifier B output - fully symmetric to OUT A; can drive identical loads with same settling time (0.25 μs to 0.1%). |
| 8 | V+ | Positive supply terminal - accepts 1.8 V to 5.5 V; PSRR is 50 μV/V typical, minimizing supply ripple coupling into output. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover RRI/O stage | Eliminates crossover distortion at rail transitions, preserving THD+N ≤0.0005% in audio applications without external compensation. |
| Ultra-low input bias current | ±0.2 pA typical enables direct connection to high-impedance sources (e.g., pH electrodes, piezoelectric sensors) without guard rings or bias resistors. |
| Low THD+N | 0.0005% at 10 kHz, 4 VPP output - meets Class D audio preamp and high-fidelity line-driver requirements in single-supply systems. |
| Unity-gain stable | Operates unconditionally stable at G = +1 with 50 pF load - simplifies design of buffer, integrator, and active filter topologies. |
| Wide temperature range | Specified from –40°C to +125°C - supports deployment in automotive cabin modules, industrial PLC analog I/O, and outdoor sensor hubs. |
Applications
| Sensor Signal Conditioning | Consumer Audio Line Driver |
|---|---|
Use Scenario: Amplifying low-level output from MEMS accelerometers or thermopile IR sensors in portable environmental monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail input to capture full sensor dynamic range on 3.3 V supply. Use Value: 2 mV max offset and 8.5 nV/√Hz noise ensure sub-millivolt resolution without post-amplifier calibration or filtering overhead. |
Use Scenario: Driving 10 kΩ line inputs in Bluetooth speakers and smart displays powered from single Li-ion cells. IC Role / Device Role / Timing Role: Low-distortion, unity-gain buffer isolating DAC output from variable cable/load impedance. Use Value: 0.0005% THD+N and 10 V/μs slew rate preserve audio fidelity across 20 Hz–20 kHz without audible artifacts. |
| Multi-Pole Active Filter | Control-Loop Amplifier |
Use Scenario: Implementing 4th-order low-pass filter for anti-aliasing before SAR ADC in motor control feedback circuits. IC Role / Device Role / Timing Role: Dual-channel op-amp configured as two 2-pole Sallen-Key stages sharing one device. Use Value: 20 MHz GBW and 47° phase margin ensure stable filter response up to 100 kHz cutoff with minimal peaking. |
Use Scenario: Error amplifier in voltage-mode DC-DC converter feedback loop requiring fast transient response. IC Role / Device Role / Timing Role: High-speed comparator replacement for analog PID compensation networks. Use Value: 0.25 μs settling time to 0.1% and 10 V/μs slew rate reduce loop latency, improving load-step recovery by >30% vs legacy amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, rail-to-rail, low-noise op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2320AIDR | Lower input voltage noise (7 nV/√Hz), higher quiescent current (1.75 mA/ch), no shutdown function. | Better SNR in ultra-low-noise sensor chains; unsuitable where power cycling or standby modes are required. | Select when noise dominates over power budget and shutdown is unnecessary. |
| MCP6V82-E/SN | Zero-drift architecture, 3 μV max offset, 1.2 mA/ch, no shutdown, 10 MHz GBW. | Superior DC accuracy for precision instrumentation; lower bandwidth limits use in audio or fast control loops. | Select when microvolt-level offset drift matters more than AC performance or shutdown capability. |
Compared with OPA2322AIDR, OPA2320AIDR trades shutdown and lower power for marginally better noise, while MCP6V82-E/SN sacrifices bandwidth and shutdown for near-zero offset drift-making OPA2322AIDR the balanced choice for mixed-signal systems needing speed, low noise, low power, and flexible power management.
Availability
OPA2322AIDR is available at Aetrix Electronics and suitable for sensor signal conditioning, consumer audio line driving, and multi-pole active filter designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA2322AIDR 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 specifically for low-power, single-supply applications demanding high speed, low noise, and rail-to-rail operation-including portable instrumentation, audio systems, and industrial sensing front-ends.
FAQ
What is the maximum capacitive load the OPA2322AIDR can drive while remaining stable?
The OPA2322AIDR is unity-gain stable and characterized to drive up to 50 pF with ≥47° phase margin at VS = 5 V. For loads exceeding 50 pF, external isolation resistance (e.g., 10–50 Ω in series with the output) is recommended to maintain stability. This capability makes the OPA2322AIDR suitable for driving ADC input capacitors and long PCB traces without oscillation risk.
Does the OPA2322AIDR support true rail-to-rail input and output operation?
Yes, the OPA2322AIDR features a zero-crossover rail-to-rail input stage and rail-to-rail output stage. Its common-mode input range extends from (V–) – 0.1 V to (V+) + 0.1 V, and output swings within 20 mV of both rails under 10 kΩ load. This enables full utilization of supply voltage headroom in 1.8 V–5.5 V single-supply systems, critical for maximizing dynamic range in battery-powered devices.
How does the shutdown feature of the OPA2322AIDR operate, and what is its timing behavior?
The OPA2322AIDR does not include shutdown functionality-the OPA2322AIDR variant is the standard dual-channel version without SHDN pins. Shutdown is only available in the OPA2322S family (e.g., OPA2322SDGS). Therefore, OPA2322AIDR operates continuously when powered; for power-gated applications, external enable circuitry or the OPA2322S variant must be selected.
What is the guaranteed maximum input offset voltage for the OPA2322AIDR over temperature?
The OPA2322AIDR has a maximum input offset voltage of 2 mV at TA = 25°C, and this specification is guaranteed over the full operating temperature range of –40°C to +125°C. Additionally, its offset drift is bounded at 6 μV/°C max, ensuring predictable DC error accumulation across industrial environments without requiring periodic recalibration.
Can the OPA2322AIDR be used with a 1.8 V single supply, and how does performance change at minimum voltage?
Yes, the OPA2322AIDR is fully specified for operation from 1.8 V to 5.5 V. At 1.8 V, gain bandwidth remains 20 MHz, slew rate drops to ~7 V/μs, and quiescent current decreases to ~1.35 mA/ch. Input common-mode range shrinks slightly but still covers (V–) – 0.1 V to (V+) + 0.1 V, and rail-to-rail output swing is maintained-making it viable for ultra-low-voltage IoT sensor nodes.
OPA2322AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
OPA2322AIDR FAQ
1.How can I place an order for OPA2322AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2322AIDR 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 OPA2322AIDR reliable?
The price and inventory of OPA2322AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2322AIDR is usually 5 days.
3.What payment methods are accepted for OPA2322AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2322AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2322AIDR?
OPA2322AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2322AIDR 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 OPA2322AIDR?
For technical support, including OPA2322AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2322AIDR requirements.
6.How does Aetrix verify that OPA2322AIDR is sourced from the original manufacturer or authorized distributors?
All OPA2322AIDR 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 OPA2322AIDR meets industry standards.
7.What is the process for return or replacement of OPA2322AIDR?
All OPA2322AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2322AIDR, 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 OPA2322AIDR part is unused and in its original packaging.
Return procedure for OPA2322AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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