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Texas Instruments OPA2322SAIDGSR
- Part No.:
- OPA2322SAIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2322SAIDGSR.pdf
- Description:
- IC CMOS 2 CIRCUIT 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,640
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Product details
Overview
OPA2322SAIDGSR from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier with shutdown control, optimized for low-noise (8.5 nV/√Hz at 1 kHz), high-speed (20-MHz gain bandwidth, 10 V/μs slew rate) signal conditioning in single-supply systems operating from 1.8 V to 5.5 V. It delivers 2 mV max offset voltage, 0.0005% THD+N, and 1.5 mA/ch quiescent current - ideal for precision audio front-ends and sensor interfaces requiring wide dynamic range and fast settling (0.25 μs to 0.1%).
For engineers reviewing the OPA2322SAIDGSR datasheet, OPA2322SAIDGSR pinout, OPA2322SAIDGSR application, or OPA2322SAIDGSR equivalent, key selection criteria include shutdown enable timing (6–10 μs), rail-to-rail I/O swing within 20 mV of rails, thermal performance in VSSOP-10 (RθJA = 171.5°C/W), and verified operation across –40°C to +125°C.
Technical Context
The OPA2322SAIDGSR implements a zero-crossover rail-to-rail input stage that eliminates distortion near supply rails, paired with a unity-gain-stable output stage capable of driving ≥10 kΩ loads with <0.1% settling in 0.25 μs. Its CMOS architecture enables ultra-low input bias current (±0.2 pA typ at 25°C) and high open-loop gain (130 dB), supporting high-precision closed-loop configurations without external compensation.
Each channel features independent active-low shutdown pins (SHDN_A and SHDN_B), enabling selective power gating. Full shutdown reduces quiescent current to 0.1 µA per channel, while partial shutdown retains internal biasing for faster wake-up (6 µs enable time). The device operates over full industrial temperature range with guaranteed specs at ±0.9 V to ±2.75 V dual supplies or 1.8–5.5 V single supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 20 MHz - supports stable unity-gain and high-gain configurations up to ~200 kHz at G = 100 without peaking. |
| Slew Rate | 10 V/μs - enables clean 2-V step response with ≤0.1% settling in 0.25 μs, critical for fast data acquisition. |
| Input Voltage Noise | 8.5 nV/√Hz at 1 kHz - ensures minimal noise contribution in microphone preamps and strain-gauge amplifiers. |
| THD+N | 0.0005% at 10 kHz, 4 VPP, 10 kΩ load - meets high-fidelity audio requirements in consumer-grade DAC output stages. |
| Offset Voltage | 2 mV maximum - allows direct DC-coupled sensor interfacing (e.g., thermopiles, RTDs) without trimming. |
| Supply Current | 1.5 mA per channel (typ) - enables dual-channel operation in battery-powered devices with >100-hour runtime on 100-mAh cells. |
| Shutdown Current | 0.1 µA per channel - reduces system standby power by >99.9% when channels are inactive. |
Pinout & Package
OPA2322SAIDGSR is housed in a 10-pin VSSOP package (DGK footprint, 3.00 mm × 3.00 mm body) with exposed thermal pad connected to V– for enhanced thermal dissipation (RθJB = 91.4°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts 1.8–5.5 V; must be decoupled with ≥0.1 µF ceramic capacitor near pin. |
| V– | Negative supply rail | Ground reference for single-supply operation; thermal pad must be soldered to PCB ground plane. |
| +IN A / +IN B | Noninverting inputs | CMOS inputs with ±0.2 pA bias current; support common-mode range from (V–) – 0.1 V to (V+) + 0.1 V. |
| –IN A / –IN B | Inverting inputs | Matched to +IN pins; enable precision differential and instrumentation amplifier topologies. |
| VOUT A / VOUT B | Amplifier outputs | Rail-to-rail swing: within 20 mV of V+ and V– at 10 kΩ load; drives capacitive loads up to 50 pF stably. |
| SHDN A / SHDN B | Active-low shutdown controls | Pull to V– to disable channel; pull to V+ to enable; VIH ≥ (V+) – 0.1 V, VIL ≤ (V–) + 0.1 V. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover RRI/O stage | Eliminates crossover distortion in Class-AB output stage, preserving signal integrity near supply rails for audio and sensor signals. |
| Independent dual shutdown | Enables asymmetric power management: one channel active while the other sleeps, reducing idle power in multi-sensor nodes. |
| Low 1/f noise (2.8 µVPP) | Minimizes drift in DC-coupled applications like medical ECG front-ends and precision weight scales. |
| High CMRR (100 dB typ) | Rejects common-mode interference in noisy industrial environments (e.g., motor drives, PLC analog inputs). |
| Unity-gain stability | Operates reliably without external compensation in buffer, gain-of-two, or active filter configurations. |
Applications
| Audio Line Driver | Medical Sensor Amplifier |
|---|---|
Use Scenario: Driving line-level analog outputs from portable DACs into 10-kΩ consumer audio equipment inputs. IC Role / Device Role / Timing Role: Dual-channel buffer with rail-to-rail output swing and ultra-low THD+N to preserve stereo fidelity. Use Value: Delivers 0.0005% THD+N at 10 kHz, enabling CD-quality playback without post-filtering or level-shifting circuitry. |
Use Scenario: Amplifying low-amplitude biopotential signals (e.g., ECG, EMG) from dry electrodes with minimal added noise. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with femtoampere input bias and 8.5 nV/√Hz noise density. Use Value: Enables sub-µV signal resolution without guard traces or active shielding, simplifying wearable PCB layout. |
| Industrial Temperature Transmitter | Multi-Pole Active Filter |
Use Scenario: Conditioning 4–20 mA loop signals from RTD or thermocouple transmitters in factory automation systems. IC Role / Device Role / Timing Role: Precision gain stage with 2 mV max offset and 130 dB open-loop gain for accurate 16-bit ADC interfacing. Use Value: Eliminates need for external offset trim, reducing BOM count and calibration time in field-deployed sensors. |
Use Scenario: Implementing 4th-order low-pass filtering for anti-aliasing before SAR ADC sampling at 1 MSPS. IC Role / Device Role / Timing Role: Dual op-amp section in biquad topology with 20-MHz GBP and 10-V/μs slew rate for flat group delay. Use Value: Supports sharp roll-off (–80 dB/decade) with <0.01% passband ripple, meeting EN 61000-4-3 immunity requirements. |
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 |
|---|---|---|---|
| OPA2320SAIDGSR | Lower noise (5.5 nV/√Hz), lower GBW (20 MHz same), higher IQ (1.75 mA/ch), no shutdown. | Lacks shutdown control; better for always-on precision measurement where power gating is unnecessary. | Choose when lowest possible noise dominates over power management flexibility. |
| AD8602ARMZ | Higher offset (600 µV max), lower GBW (9.5 MHz), no shutdown, wider temp range (–40°C to +125°C same). | Higher distortion (0.001%) and slower settling limit use in high-fidelity audio or fast data acquisition. | Choose for cost-sensitive industrial analog I/O where moderate precision suffices and TI supply chain constraints exist. |
Compared with OPA2322SAIDGSR, OPA2320SAIDGSR trades shutdown capability for lower noise, while AD8602ARMZ offers broader vendor availability but sacrifices speed, noise, and THD+N - making OPA2322SAIDGSR optimal for battery-powered, high-fidelity dual-channel signal chains requiring dynamic power control.
Availability
OPA2322SAIDGSR is available at Aetrix Electronics and suitable for sensor signal conditioning, consumer audio line drivers, and multi-pole active filters requiring stable component supply across automotive, industrial, and medical design cycles.
Supply support for OPA2322SAIDGSR 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 op-amps and signal-chain solutions.
The OPAx322x family was designed specifically for low-power, single-supply applications demanding rail-to-rail I/O, low noise, and fast settling - targeting portable instrumentation, audio systems, and industrial sensing where efficiency and fidelity coexist.
FAQ
What is the maximum capacitive load the OPA2322SAIDGSR can drive without instability?
The OPA2322SAIDGSR is specified to drive up to 50 pF capacitive loads stably in unity-gain configuration, as confirmed by small-signal overshoot testing in the datasheet (Figure 16). For loads exceeding 50 pF, external isolation resistance (≥100 Ω) or feedback capacitor compensation is required. This capability enables direct connection to ADC input capacitors and long PCB traces without oscillation risk in the OPA2322SAIDGSR design.
Does the OPA2322SAIDGSR support true rail-to-rail input with input voltages beyond the supply rails?
No - the OPA2322SAIDGSR supports rail-to-rail input within (V–) – 0.1 V to (V+) + 0.1 V, as specified in the Electrical Characteristics table. Input signals exceeding this range must be current-limited to ≤10 mA to avoid damage from internal ESD diodes. This specification applies directly to the OPA2322SAIDGSR and is validated across its full operating temperature range.
How does shutdown behavior differ between full and partial modes in the OPA2322SAIDGSR?
In full shutdown (both SHDN_A and SHDN_B pulled low), the OPA2322SAIDGSR draws 0.1 µA per channel and requires 10 µs to re-enable. In partial shutdown (only one SHDN pin asserted), internal biasing remains active, reducing enable time to 6 µs - a feature explicitly documented for the OPA2322SAIDGSR in Section 7.4 of the datasheet for low-latency wake-up in duty-cycled systems.
Can the OPA2322SAIDGSR operate from a 1.8-V single supply while maintaining full AC performance?
Yes - the OPA2322SAIDGSR is fully characterized from 1.8 V to 5.5 V, including 20-MHz GBP, 10 V/μs slew rate, and 8.5 nV/√Hz noise at 1.8 V, as shown in Figures 6, 9, and 21 of the datasheet. All key AC specs remain valid at minimum supply, enabling ultra-low-voltage IoT sensor nodes without performance compromise in the OPA2322SAIDGSR implementation.
What is the thermal resistance (RθJA) of the OPA2322SAIDGSR in its VSSOP-10 package?
The OPA2322SAIDGSR in the DGS (VSSOP-10) package has a junction-to-ambient thermal resistance (RθJA) of 171.5°C/W, per Table 6.5 in the datasheet. This value assumes standard JEDEC 2-layer board conditions and confirms suitability for continuous operation at 125°C ambient when dissipating ≤150 mW per channel - a key thermal design parameter for the OPA2322SAIDGSR in enclosed industrial enclosures.
OPA2322SAIDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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:
- 10-VSSOP
OPA2322SAIDGSR FAQ
1.How can I place an order for OPA2322SAIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2322SAIDGSR 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 OPA2322SAIDGSR reliable?
The price and inventory of OPA2322SAIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2322SAIDGSR is usually 5 days.
3.What payment methods are accepted for OPA2322SAIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2322SAIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2322SAIDGSR?
OPA2322SAIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2322SAIDGSR 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 OPA2322SAIDGSR?
For technical support, including OPA2322SAIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2322SAIDGSR requirements.
6.How does Aetrix verify that OPA2322SAIDGSR is sourced from the original manufacturer or authorized distributors?
All OPA2322SAIDGSR 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 OPA2322SAIDGSR meets industry standards.
7.What is the process for return or replacement of OPA2322SAIDGSR?
All OPA2322SAIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2322SAIDGSR, 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 OPA2322SAIDGSR part is unused and in its original packaging.
Return procedure for OPA2322SAIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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