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Texas Instruments OPA2320SAIDGSR
- Part No.:
- OPA2320SAIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2320SAIDGSR.pdf
- Description:
- IC CMOS 2 CIRCUIT 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:714
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Product details
Overview
OPA2320SAIDGSR from Texas Instruments is a dual-channel, precision, rail-to-rail input/output CMOS operational amplifier with shutdown functionality, optimized for low-noise (7 nV/√Hz at 10 kHz), high-speed (20-MHz GBW), and ultra-low input bias current (0.9 pA max) operation on single supplies from 1.8 V to 5.5 V - ideal for high-impedance sensor signal conditioning in battery-powered test equipment.
For engineers reviewing the OPA2320SAIDGSR datasheet, OPA2320SAIDGSR pinout, OPA2320SAIDGSR application, or OPA2320SAIDGSR equivalent, this page delivers verified specifications, validated VSSOP-10 pin functions, real-world use cases in transimpedance amplifiers and PLC analog I/O, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The OPA2320SAIDGSR implements a linear input stage with zero-crossover distortion architecture, delivering 114 dB typical CMRR over full input range and rail-to-rail input common-mode voltage extending 100 mV beyond both supply rails. Its output swings within 10 mV of rails under 10-kΩ load at 25°C.
It integrates independent active-low shutdown pins (SHDN A and SHDN B) per channel, enabling selective power gating with 0.1 µA quiescent current per disabled amplifier. PSRR remains stable at 106 dB across 1.8–5.5 V supply range, supporting direct battery operation without regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 20 MHz - supports stable unity-gain operation and accurate 12–16-bit ADC driving up to ~1.5 MSPS sampling rates. |
| Input Bias Current | 0.9 pA (max) - enables use with >1 GΩ source impedances in photodiode or pH sensor front-ends without significant offset drift. |
| Input Voltage Noise | 7 nV/√Hz at 10 kHz - ensures minimal noise contribution in wideband signal chains such as active filters and communication receivers. |
| Offset Voltage | 150 µV (max) - provides <0.01% gain error in 12-bit systems with ±2.5 V full-scale range. |
| Quiescent Current | 1.45 mA per channel - balances speed and power for portable instrumentation requiring <3 mA total supply current. |
| Shutdown Current | 0.1 µA per channel - reduces system standby power by >99.9% when channels are inactive, critical for energy harvesting nodes. |
| Supply Range | 1.8 V to 5.5 V - allows direct interface with Li-ion, Li-po, or two-cell alkaline batteries without LDO regulation. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm body size) with exposed thermal pad on underside; requires connection of thermal pad to V– for optimal thermal performance and reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 10 kΩ with rail-to-rail swing; must be decoupled with 100 nF capacitor if driving capacitive loads >50 pF. |
| 2 | –IN A | Inverting input, channel A - high-impedance node; layout requires guard ring and minimized trace length to preserve 0.9-pA bias spec. |
| 3 | +IN A | Noninverting input, channel A - referenced to same ground plane as –IN A to maintain CMRR >114 dB. |
| 4 | V– | Negative supply - connects to system ground or negative rail; thermal pad must be soldered to this net for RθJB = 91.4°C/W. |
| 5 | SHDN A | Active-low shutdown control for channel A - pulled high internally; driven low (<0.3×VS+) to disable amplifier and reduce IQ to 0.1 µA. |
| 6 | SHDN B | Active-low shutdown control for channel B - independent of SHDN A; enables asymmetric power management in multi-channel systems. |
| 7 | +IN B | Noninverting input, channel B - electrically isolated from +IN A; supports differential or independent single-ended configurations. |
| 8 | –IN B | Inverting input, channel B - matched to –IN A in offset and bias; enables true dual-channel transimpedance designs. |
| 9 | OUT B | Amplifier B output - identical AC/DC specs to OUT A; may be paralleled only with external current-sharing resistors. |
| 10 | V+ | Positive supply - accepts 1.8–5.5 V; requires local 100 nF ceramic bypass capacitor placed ≤2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Input common-mode extends 100 mV beyond rails; output swings to within 10 mV of rails at 10-kΩ load - eliminates level-shifting in low-voltage systems. |
| Zero-crossover distortion | Linear input stage maintains 114 dB CMRR across full input range - prevents harmonic distortion in precision DC-coupled measurement paths. |
| Ultra-low input bias current | 0.9 pA maximum at 25°C - preserves signal integrity in femtoamp-level photodiode, ion-selective electrode, or piezoelectric sensor interfaces. |
| Independent dual shutdown | Separate SHDN A and SHDN B pins allow per-channel power gating - enables dynamic power scaling in multi-sensor data loggers. |
| High PSRR (106 dB) | Maintains precision under noisy supply conditions - suitable for mixed-signal PCBs where digital switching couples into analog rails. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces bill-of-materials for buffer, filter, and ADC driver applications. |
Applications
| High-Z Sensor Signal Conditioning | Transimpedance Amplifiers |
|---|---|
Use Scenario: Amplifying weak current signals from photodiodes, electrochemical cells, or MEMS sensors in portable gas analyzers. IC Role / Device Role / Timing Role: Precision current-to-voltage conversion with sub-picoamp input leakage and low 1/f noise. Use Value: Enables detection of <100 fA signals with <0.1% linearity error over temperature using standard PCB materials. |
Use Scenario: Converting photocurrent from avalanche photodiodes in optical time-of-flight (ToF) modules. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth TIA front-end with fast overload recovery (100 ns). Use Value: Supports 10-kHz modulation frequencies with THD+N <0.0005%, preserving timing resolution in distance measurement. |
| Programmable Logic Controllers (PLCs) | Input/Output ADC/DAC Buffers |
Use Scenario: Isolated analog input conditioning in industrial PLC modules handling 4–20 mA loop signals. IC Role / Device Role / Timing Role: Rail-to-rail buffer and level shifter interfacing field-side sensors to SAR ADCs. Use Value: Maintains 16-bit effective resolution across –40°C to +125°C ambient with <150 µV offset drift. |
Use Scenario: Driving successive-approximation register (SAR) ADC inputs and buffering DAC outputs in motor control feedback loops. IC Role / Device Role / Timing Role: Low-output-impedance, fast-settling (0.32 µs to 0.01%) voltage buffer. Use Value: Eliminates acquisition errors in 1 MSPS 14-bit ADCs by settling within 1 LSB before sample-and-hold closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2313AIDR | Lower bandwidth (1 MHz), higher input bias current (10 pA), no shutdown function, 0.35 mA/ch IQ. | Suitable for DC-coupled, low-speed sensor interfaces where power and speed are secondary to cost. | Select when budget constraints outweigh need for 20-MHz BW or sub-pA bias; verify CMRR (90 dB) suffices for your signal chain. |
| ADA4522-2ARMZ | Zero-drift architecture, 2.5 µV max offset, 5.6 nV/√Hz noise, 3 MHz GBW, no shutdown, 1.2 mA/ch IQ. | Better DC accuracy for thermocouple or strain gauge bridges; unsuitable for >100-kHz dynamic signals. | Choose for ultra-stable DC gain blocks where long-term drift matters more than bandwidth; avoid for ADC driver roles. |
Compared with OPA2320SAIDGSR, OPA2313AIDR trades bandwidth and input bias for lower cost and simpler biasing, while ADA4522-2ARMZ prioritizes near-zero drift over speed - making OPA2320SAIDGSR uniquely balanced for high-Z, wideband, low-power precision analog front-ends.
Availability
OPA2320SAIDGSR is available at Aetrix Electronics and suitable for high-impedance sensor signal conditioning, transimpedance amplifier designs, and programmable logic controller (PLC) analog I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2320SAIDGSR 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 company specializing in analog and embedded processing technologies, with leadership in precision signal chain components and industrial-grade ICs.
The OPA2320SAIDGSR belongs to TI's OPAx320x precision op-amp family, engineered specifically for low-noise, low-input-bias, rail-to-rail operation in battery-powered and high-impedance measurement systems - not general-purpose amplification.
FAQ
What is the maximum operating temperature for the OPA2320SAIDGSR?
The OPA2320SAIDGSR is specified for continuous operation from –40°C to +125°C ambient temperature, with electrical characteristics guaranteed across this full industrial range. Thermal derating begins above 125°C junction temperature, and absolute maximum junction temperature is 150°C per the datasheet's Absolute Maximum Ratings table.
Does the OPA2320SAIDGSR require external compensation for unity-gain stability?
No, the OPA2320SAIDGSR is internally compensated and unity-gain stable - no external capacitors or resistors are needed for stable operation at gain = +1. This is confirmed in the Features section and Electrical Characteristics table (Phase Margin = 47° at CL = 50 pF), enabling straightforward buffer and follower implementations.
How does the shutdown function operate on the OPA2320SAIDGSR?
The OPA2320SAIDGSR features two independent active-low shutdown pins: SHDN A (pin 5) and SHDN B (pin 6). Driving either pin below 0.3×VS+ disables its respective amplifier channel, reducing quiescent current to 0.1 µA per disabled channel. Both pins must be high to enable full dual-channel operation.
Can the OPA2320SAIDGSR drive capacitive loads directly?
The OPA2320SAIDGSR can safely drive ≤50 pF capacitive loads without external isolation; for larger loads (e.g., ADC input capacitance), a series resistor (typically 10–50 Ω) between amplifier output and load is recommended to maintain phase margin and prevent peaking or oscillation, as shown in Figure 20 of the datasheet.
What is the input common-mode voltage range of the OPA2320SAIDGSR?
The OPA2320SAIDGSR supports rail-to-rail input with a common-mode voltage range from (V–) – 0.1 V to (V+) + 0.1 V - extending 100 mV beyond both supply rails. This allows full-scale signal capture in single-supply systems, such as 0–3.3 V sensor outputs referenced to ground.
OPA2320SAIDGSR 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:
- 40 µV
- Current - Supply:
- 1.45mA
- 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
OPA2320SAIDGSR FAQ
1.How can I place an order for OPA2320SAIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2320SAIDGSR 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 OPA2320SAIDGSR reliable?
The price and inventory of OPA2320SAIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2320SAIDGSR is usually 5 days.
3.What payment methods are accepted for OPA2320SAIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2320SAIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2320SAIDGSR?
OPA2320SAIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2320SAIDGSR 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 OPA2320SAIDGSR?
For technical support, including OPA2320SAIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2320SAIDGSR requirements.
6.How does Aetrix verify that OPA2320SAIDGSR is sourced from the original manufacturer or authorized distributors?
All OPA2320SAIDGSR 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 OPA2320SAIDGSR meets industry standards.
7.What is the process for return or replacement of OPA2320SAIDGSR?
All OPA2320SAIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2320SAIDGSR, 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 OPA2320SAIDGSR part is unused and in its original packaging.
Return procedure for OPA2320SAIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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