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Texas Instruments OPA2323IDGKR
- Part No.:
- OPA2323IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2323IDGKR.pdf
- Description:
- DUAL, 5.5-V, 20-MHZ, ZERO-CROSS
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
OPA2323IDGKR from Texas Instruments is a dual-channel, rail-to-rail input/output zero-cross operational amplifier optimized for precision, high-speed signal conditioning in 1.7V–5.5V systems. It delivers 20MHz gain-bandwidth, 114dB typical CMRR, 33V/μs slew rate, ±150µV typical input offset voltage, and operates across –40°C to +125°C - enabling high-fidelity ADC driver and bidirectional current-sense applications in solar inverters and motor control.
For engineers reviewing the OPA2323IDGKR datasheet, OPA2323IDGKR pinout, OPA2323IDGKR application, or OPA2323IDGKR equivalent, key selection criteria include its zero-crossover architecture for rail-to-rail linearity, fast 200ns 0.01% settling (2V step), low 5.5nV/√Hz noise at 10kHz, ±110mA output drive at 5.5V, and guaranteed unity-gain stability with up to 150pF capacitive load.
Technical Context
The OPA2323IDGKR employs a proprietary zero-crossover input stage that eliminates crossover distortion across the full input common-mode range - critical for maintaining THD+N < 0.00125% in audio pre-amplifiers and accurate signal reconstruction in ADC drivers. Its 20MHz GBW and 33V/μs slew rate support sampling rates up to 5MSPS with sub-200ns settling to 0.01%.
This dual op-amp features rail-to-rail input and output stages, 100dB minimum CMRR over temperature, internal RFI/EMI filtering on input pins, and robust operation under 1.7V single-supply conditions - making it suitable for low-voltage industrial sensing and battery-powered ultrasonic transducer interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 20MHz - enables stable closed-loop operation up to 5MSPS ADC sampling with minimal phase lag |
| Slew rate | 33V/μs - supports fast transient response in fault detection circuits and high-frequency sensor interfaces |
| CMRR | 114dB typical at 5.5V - rejects power supply and common-mode noise in precision current sensing |
| Input offset voltage | ±150µV typical - ensures <1 LSB error in 16-bit ADC driver configurations at 5V full-scale |
| Settling time (0.01%) | 200ns for 2V step - meets timing budget for high-speed data acquisition with minimal dead time |
| Supply voltage range | 1.7V to 5.5V - compatible with Li-ion, USB, and industrial 3.3V/5V rails without level-shifting |
| Output drive | ±110mA at 5.5V - directly drives 150pF loads and low-impedance transducers without external buffers |
Pinout & Package
The OPA2323IDGKR is housed in an 8-pin SOIC (D) package measuring 4.9mm × 6mm, with exposed pad not present. Pin functions are fully defined per TI SBOSAE8C Rev. APRIL 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Output, channel 1 | Delivers amplified signal with rail-to-rail swing; capable of ±110mA sourcing/sinking at 5.5V |
| IN1– (Pin 2) | Inverting input, channel 1 | Differential input node; accepts signals from V– – 0.2V to V+ + 0.15V with 114dB CMRR |
| IN1+ (Pin 3) | Noninverting input, channel 1 | High-impedance input (100GΩ || 1pF); supports direct connection to Wheatstone bridges or photodiode nodes |
| V– (Pin 4) | Negative supply / ground | Reference for both inputs and outputs; must be connected to system ground or negative rail |
| IN2+ (Pin 5) | Noninverting input, channel 2 | Independent second channel input; identical specs to IN1+, enabling dual-path signal conditioning |
| IN2– (Pin 6) | Inverting input, channel 2 | Second differential pair input; supports independent gain configuration per channel |
| OUT2 (Pin 7) | Output, channel 2 | Second rail-to-rail output; fully isolated from OUT1 electrically and thermally |
| V+ (Pin 8) | Positive supply | Accepts 1.7V–5.5V; bypass capacitor (0.1µF ceramic) required adjacent to pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Eliminates distortion at signal zero-crossings - essential for high-linearity ADC drivers and audio preamps |
| Rail-to-rail I/O | Supports full dynamic range utilization in low-voltage (1.7V) systems without headroom loss |
| 150pF capacitive load drive | Stable operation into typical ADC input capacitance or long PCB traces without external isolation resistors |
| Internal RFI/EMI filtering | Rejects 1.8GHz interference (62dB EMIRR) - improves reliability in noisy industrial/motor environments |
| –40°C to +125°C operation | Validated performance across automotive under-hood and industrial ambient extremes |
Applications
| Amplifier Driver for High-Speed ADCs | High-Side Current Sensing |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs in data acquisition systems requiring >16-bit accuracy and 1–5MSPS sampling. IC Role / Device Role: Precision buffer and gain stage with zero-crossover linearity to preserve small-signal integrity during rail-to-rail input transitions. Use Value: 200ns 0.01% settling and 5.5nV/√Hz noise ensure <0.5LSB noise floor and minimal harmonic distortion in 16-bit conversions. | Use Scenario: Bidirectional current monitoring in solar string inverters and EV battery management systems using shunt resistors. IC Role / Device Role: Differential amplifier with matched input bias and ultra-low offset drift (±2µV/°C) for accurate high-side sensing. Use Value: Identical precision for high- and low-side configurations eliminates calibration asymmetry; 114dB CMRR rejects bus noise in 400V+ DC-link environments. |
| Motor Rotary Encoder Interface | Transimpedance Photodiode Amplifier |
Use Scenario: Conditioning sine/cosine analog outputs from optical or magnetic rotary encoders in servo drives and robotics. IC Role / Device Role: Low-noise, high-bandwidth signal conditioner preserving phase coherence between quadrature channels. Use Value: 20MHz GBW and 33V/μs slew rate maintain <1° phase error up to 200kHz encoder frequencies; rail-to-rail output drives ADC reference ranges directly. | Use Scenario: Converting low-level photocurrents (nA–µA) from UV/visible photodiodes in analytical instrumentation or medical sensors. IC Role / Device Role: Low-input-bias-current (±0.5pA typ), low-noise transimpedance amplifier with wide dynamic range. Use Value: Sub-picoampere input bias minimizes dark-current error; 5.5nV/√Hz noise enables detection of <10nA signals at 10kHz bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2350EA/250 | Lower GBW (38MHz vs 20MHz), higher quiescent current (5.5mA/ch), no zero-crossover architecture | Lacks rail-to-rail linearity at signal zero-crossings; unsuitable for precision ADC drivers requiring <0.001% THD+N | Choose only if higher speed and lower noise (7nV/√Hz) outweigh distortion and power penalties |
| ADA4807-2 | Higher GBW (180MHz), higher slew rate (225V/μs), but higher input offset (±250µV) and narrower supply range (3V–10V) | Not rated for 1.7V operation; excessive bandwidth causes instability with typical 150pF ADC loads unless compensated | Select when >100MHz small-signal bandwidth is mandatory and supply rails ≥3V are available |
Compared with OPA2323IDGKR, OPA2350EA/250 trades zero-crossover linearity for raw speed and noise, while ADA4807-2 sacrifices low-voltage operation and load drive robustness for extreme bandwidth - neither matches the OPA2323IDGKR's balanced precision, speed, and 1.7V compatibility in space-constrained industrial designs.
Availability
OPA2323IDGKR is available at Aetrix Electronics and suitable for high-speed data acquisition, precision current sensing, and motor encoder interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2323IDGKR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The OPAx323 family was designed specifically for precision, low-voltage, high-speed signal conditioning - targeting ADC drivers, current sensing, and sensor interfaces where zero-crossover linearity, rail-to-rail operation, and 1.7V compatibility are mandatory.
FAQ
What is the operating temperature range specified for the OPA2323IDGKR?
The OPA2323IDGKR is characterized for continuous operation from –40°C to +125°C ambient temperature. This range is validated across all key parameters including input offset voltage drift (±2µV/°C max), CMRR (≥84dB at 125°C), and open-loop gain (≥100dB). The device maintains stability and rail-to-rail functionality throughout this range, making it suitable for under-hood automotive and industrial control environments where thermal stress is critical.
Does the OPA2323IDGKR support true rail-to-rail input and output operation?
Yes, the OPA2323IDGKR supports true rail-to-rail input and output operation. Its input common-mode range extends from (V–) – 0.2V to (V+) + 0.15V, enabling signal acquisition beyond supply rails. The output swings within 25mV of each rail (at 5.5V, RL = 10kΩ), delivering full dynamic range in low-voltage systems. This capability is confirmed in TI SBOSAE8C Section 6.7 Electrical Characteristics and is essential for maximizing SNR in 1.7V–5.5V applications like portable instrumentation and energy harvesting interfaces.
What is the maximum capacitive load the OPA2323IDGKR can drive without oscillation?
The OPA2323IDGKR is specified to drive up to 150pF capacitive loads without sustained oscillations, as stated in its key features and verified in Figure 6-21 of the SBOSAE8C datasheet. This capability is enabled by internal compensation and phase margin ≥50° at 30pF load. For loads exceeding 150pF, external series resistance (typically 10–50Ω) at the output is recommended to maintain stability - a design practice confirmed in TI Application Report SLOA058B for driving ADC inputs and long traces.
How does the zero-crossover architecture of the OPA2323IDGKR improve performance in ADC driver applications?
The zero-crossover architecture in the OPA2323IDGKR eliminates crossover distortion at signal zero-crossings - a limitation of conventional complementary input stages. This results in THD+N < 0.00125% at 10kHz and preserves waveform fidelity during rail-to-rail input swings. In ADC driver applications, this translates to <0.5LSB harmonic error in 16-bit systems and accurate representation of low-amplitude signals near midscale, directly improving effective resolution and measurement repeatability in precision data acquisition systems using the OPA2323IDGKR.
Is the OPA2323IDGKR pin-compatible with other devices in the OPAx323 family?
No, the OPA2323IDGKR (SOIC-8) is not pin-compatible with other OPAx323 variants. The single-channel OPA323 uses 5-pin SOT-23 or SC70 packages; the quad OPA4323 uses 14-pin SOIC or TSSOP; and shutdown versions (e.g., OPA2323S) require 10-pin X2QFN. Pin mapping differs across channel counts and packages - for example, OPA2323IDGKR assigns IN2+ to Pin 5 and IN2– to Pin 6, whereas OPA4323 uses Pins 5/6 for IN2+/IN2– but adds four more channels. Migration requires PCB layout revision.
OPA2323IDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 2
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 33V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.6mA (x2 Channels)
- Current - Output / Channel:
- 110 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2323IDGKR FAQ
1.How can I place an order for OPA2323IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2323IDGKR 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 OPA2323IDGKR reliable?
The price and inventory of OPA2323IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2323IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2323IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2323IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2323IDGKR?
OPA2323IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2323IDGKR 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 OPA2323IDGKR?
For technical support, including OPA2323IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2323IDGKR requirements.
6.How does Aetrix verify that OPA2323IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2323IDGKR 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 OPA2323IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2323IDGKR?
All OPA2323IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2323IDGKR, 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 OPA2323IDGKR part is unused and in its original packaging.
Return procedure for OPA2323IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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