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Texas Instruments OPA2322SAIDGST
- Part No.:
- OPA2322SAIDGST
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2322SAIDGST.pdf
- Description:
- IC CMOS 2 CIRCUIT 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:296
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Product details
Overview
OPA2322SAIDGST 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) operation from 1.8 V to 5.5 V supply. It delivers 2 mV max offset voltage, 1.5 mA/ch quiescent current, and 0.1 μA/ch shutdown current - enabling precision signal conditioning in space-constrained, battery-powered sensor and audio systems.
For engineers reviewing the OPA2322SAIDGST datasheet, OPA2322SAIDGST pinout, OPA2322SAIDGST application, or OPA2322SAIDGST equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for dual-channel, low-voltage, low-noise op-amp selection.
Technical Context
The OPA2322SAIDGST implements a zero-crossover rail-to-rail input stage that eliminates distortion during common-mode transitions near supply rails. Its CMOS input architecture achieves ultra-low input bias current (±0.2 pA typ at 25°C) and high open-loop gain (130 dB typ), supporting stable unity-gain configurations with 47° phase margin at 5 V with 50 pF load.
Each channel features independent active-low shutdown pins (SHDN_A and SHDN_B), enabling selective power gating with 3 μs disable time and 10 μs full-enable time. The device operates across –40°C to +125°C and supports rail-to-rail output swing within 20 mV of both rails under 10 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 20 MHz - enables stable closed-loop gain ≥10 at 2 MHz for anti-aliasing or multi-pole filter stages. |
| Input Voltage Noise Density | 8.5 nV/√Hz at 1 kHz - critical for preserving SNR in low-level sensor amplification (e.g., thermopile, bridge outputs). |
| Slew Rate | 10 V/μs - supports clean 10-VPP, 10-kHz sine wave generation without slewing distortion in audio line drivers. |
| Offset Voltage (max) | 2 mV - ensures ≤0.2% gain error in 1-V full-scale instrumentation amplifier front-ends. |
| Supply Current per Channel | 1.5 mA at 5.5 V - allows dual-channel operation on coin-cell or single-LiPo supplies with <3.0 mA total active current. |
| Shutdown Current per Channel | 0.1 μA - reduces system standby power to sub-microwatt levels when channels are individually disabled. |
| Common-Mode Input Range | (V–) – 0.1 V to (V+) + 0.1 V - accepts inputs beyond rails for robust interfacing with ADC reference buffers or level-shifted sensors. |
Pinout & Package
The OPA2322SAIDGST is packaged in a 10-pin VSSOP (DGS) with 3.00 mm × 3.00 mm body size and exposed thermal pad on underside (to be connected to V–). Pin 1 is top-left corner with dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts 1.8 V to 5.5 V; decoupling capacitor required within 1 cm for stability. |
| OUT A | Channel A output | Rail-to-rail swing; drives 10 kΩ load to within 20 mV of either rail at 25°C. |
| –IN A | Inverting input, Channel A | High-impedance CMOS node; bias current ±0.2 pA typ minimizes resistor-induced offset errors. |
| +IN A | Noninverting input, Channel A | Matches –IN A in offset and bias; used for unity-gain buffer or differential pair configuration. |
| SHDN A | Active-low shutdown, Channel A | Pulled low (≤0.1 V) disables Channel A; 0.1 μA shutdown current; 3 μs disable time. |
| SHDN B | Active-low shutdown, Channel B | Independent control of Channel B; enables asymmetric power management in multi-stage designs. |
| +IN B | Noninverting input, Channel B | Electrically isolated from Channel A; supports dual-sensor readout with separate gain paths. |
| –IN B | Inverting input, Channel B | Matched to +IN B; maintains >130 dB channel separation at 1 kHz for crosstalk-sensitive applications. |
| OUT B | Channel B output | Identical performance to OUT A; supports dual-output configurations like stereo preamps or dual feedback loops. |
| V– | Negative supply rail | Connected to ground in single-supply use; thermal pad must be soldered to V– plane for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover RRI/O architecture | Eliminates crossover distortion in Class-AB output stage, enabling accurate DC-coupled signal amplification across full rail range. |
| Ultra-low input bias current | ±0.2 pA typical at 25°C - permits use of high-value feedback resistors (>1 MΩ) without significant offset drift or noise penalty. |
| Low THD+N (0.0005%) | Preserves audio fidelity in consumer-grade line drivers and headphone amplifiers operating at 10 kHz, 4-VPP output. |
| Unity-gain stable | Operates reliably with gain = +1 without external compensation - simplifies PCB layout for buffer and follower applications. |
| Wide temperature range | Specified from –40°C to +125°C - suitable for automotive cabin sensors, industrial motor controllers, and outdoor IoT nodes. |
Applications
| Medical Sensor Interface | Portable Audio Preamp |
|---|---|
Use Scenario: Amplifying microvolt-level signals from ECG electrodes in battery-powered wearable monitors. IC Role / Device Role / Timing Role: Dual-channel instrumentation front-end: Channel A conditions differential electrode pair; Channel B buffers reference voltage. Use Value: 8.5 nV/√Hz noise floor preserves diagnostic signal integrity; rail-to-rail I/O accommodates variable electrode offsets without level-shifting circuitry. |
Use Scenario: Low-noise, single-supply preamplifier for MEMS microphones in Bluetooth earbuds. IC Role / Device Role / Timing Role: Dual op-amp configured as AC-coupled gain stage (G = 20) and DC-blocking buffer before ADC. Use Value: 0.0005% THD+N ensures clean audio capture; 1.5 mA/ch current enables >100-hour battery life on 100-mAh cell. |
| Multi-Pole Active Filter | Industrial Process Controller |
Use Scenario: 4th-order Butterworth low-pass filter for anti-aliasing in 100-kSPS data acquisition modules. IC Role / Device Role / Timing Role: Two OPA2322SAIDGST channels implement cascaded Sallen-Key stages with precise pole placement. Use Value: 20 MHz GBW supports filter cutoff up to 200 kHz; matched channel characteristics ensure consistent phase response across stages. |
Use Scenario: Signal conditioning for 4–20 mA loop-powered transmitters in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Dual op-amp used for current-to-voltage conversion and isolation amplifier output buffering. Use Value: 2 mV max offset minimizes zero-error in 16-bit measurement systems; shutdown capability reduces self-heating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, low-noise, rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2320AIDGSR | Lower input voltage noise (5.5 nV/√Hz), but no shutdown function; 1.8 V to 5.5 V supply; 20 MHz GBW. | Lacks independent channel shutdown - unsuitable for dynamic power-gating architectures requiring per-channel control. | Select when lowest possible noise dominates over power management flexibility; requires external enable logic if shutdown needed. |
| MCP6V82-E/MS | Zero-drift architecture; 0.25 μV max offset, 115 dB CMRR; 10 MHz GBW; 1.8 V to 5.5 V; no shutdown. | Superior DC accuracy but lower bandwidth - better for precision DC sensing, worse for audio or fast transient response. | Select for ultra-low offset and drift-critical applications (e.g., weigh scales); avoid where >15 MHz signal bandwidth is required. |
Compared with OPA2322SAIDGST, OPA2320AIDGSR trades shutdown capability for lower noise, while MCP6V82-E/MS sacrifices bandwidth and shutdown for near-zero drift - making OPA2322SAIDGST the balanced choice for mixed-signal systems needing speed, noise control, and dynamic power management.
Availability
OPA2322SAIDGST is available at Aetrix Electronics and suitable for medical wearables, portable audio devices, industrial data acquisition, and automotive cabin sensor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2322SAIDGST 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-power, single-supply systems demanding high AC performance (bandwidth, slew rate, noise) and robust DC specifications (offset, CMRR) - targeting sensor interfaces, portable audio, and industrial control.
FAQ
What is the maximum operating temperature for the OPA2322SAIDGST?
The OPA2322SAIDGST is fully specified from –40°C to +125°C ambient temperature. Its thermal design - including 171.5°C/W junction-to-ambient resistance in the 10-pin VSSOP package and thermal pad connection to V– - ensures reliable operation at the upper limit when mounted per TI's layout guidelines. This makes OPA2322SAIDGST suitable for under-hood automotive or enclosed industrial environments where thermal management is constrained.
Does the OPA2322SAIDGST support true rail-to-rail input and output?
Yes, the OPA2322SAIDGST supports rail-to-rail input (common-mode range extends 0.1 V beyond both supply rails) and rail-to-rail output (swings to within 20 mV of V+ and V– under 10 kΩ load at 25°C). This capability is enabled by its CMOS input stage and complementary output transistors, allowing direct interfacing with ADCs, DACs, and other ICs operating at the same supply without level-shifting components - a key advantage in compact, low-voltage systems using OPA2322SAIDGST.
How does the shutdown feature work on the OPA2322SAIDGST?
The OPA2322SAIDGST has two independent active-low shutdown pins: SHDN_A and SHDN_B. Driving either pin to ≤(V–) + 0.1 V disables its respective amplifier channel, reducing quiescent current to 0.1 μA per channel. Disable time is 3 μs; full enable time (both channels) is 10 μs. This per-channel control allows dynamic power optimization - for example, disabling Channel B during idle periods while keeping Channel A active for always-on sensor monitoring - a capability unique to OPA2322SAIDGST among its family variants.
Can the OPA2322SAIDGST drive capacitive loads?
The OPA2322SAIDGST can safely drive ≥50 pF loads with stable unity-gain performance (47° phase margin at 5 V). For larger capacitive loads (e.g., >100 pF), TI recommends adding a small series resistor (10–50 Ω) between the output and load to isolate capacitance and maintain stability. Typical overshoot remains <10% up to 2500 pF with G = 1 at 5.5 V, as verified in Figure 16 of the SBOS538F datasheet - confirming OPA2322SAIDGST's suitability for driving ADC input filters or long PCB traces without oscillation.
What is the input bias current specification for the OPA2322SAIDGST?
The OPA2322SAIDGST features ultra-low input bias current: ±0.2 pA typical and ±10 pA maximum at 25°C, with ±400 pA maximum over –40°C to +125°C. This CMOS-input performance enables high-impedance sensor interfaces (e.g., pH electrodes, photodiode transimpedance amps) without significant error from bias-current-induced voltage drops across feedback networks. The matched input bias currents also minimize offset errors in differential configurations - a verified characteristic of the OPA2322SAIDGST design.
OPA2322SAIDGST 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
OPA2322SAIDGST FAQ
1.How can I place an order for OPA2322SAIDGST through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2322SAIDGST 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 OPA2322SAIDGST reliable?
The price and inventory of OPA2322SAIDGST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2322SAIDGST is usually 5 days.
3.What payment methods are accepted for OPA2322SAIDGST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2322SAIDGST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2322SAIDGST?
OPA2322SAIDGST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2322SAIDGST 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 OPA2322SAIDGST?
For technical support, including OPA2322SAIDGST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2322SAIDGST requirements.
6.How does Aetrix verify that OPA2322SAIDGST is sourced from the original manufacturer or authorized distributors?
All OPA2322SAIDGST 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 OPA2322SAIDGST meets industry standards.
7.What is the process for return or replacement of OPA2322SAIDGST?
All OPA2322SAIDGST units undergo pre-shipment inspection (PSI). If there is an issue with OPA2322SAIDGST, 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 OPA2322SAIDGST part is unused and in its original packaging.
Return procedure for OPA2322SAIDGST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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