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Texas Instruments OPA2325IDR
- Part No.:
- OPA2325IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2325IDR.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,085
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Product details
Overview
OPA2325IDR from Texas Instruments is a dual-channel, precision rail-to-rail input/output CMOS operational amplifier optimized for low-noise, wide-bandwidth ADC driving in battery-powered systems. It delivers 10 MHz gain bandwidth, 5 V/µs slew rate, 9 nV/√Hz input voltage noise at 10 kHz, 150 µV max offset voltage, and operates from 2.2 V to 5.5 V single supply - enabling high-fidelity signal conditioning in SAR ADC front-ends.
For engineers reviewing the OPA2325IDR datasheet, OPA2325IDR pinout, OPA2325IDR application, or OPA2325IDR equivalent, this page provides verified specifications, SOIC-8 package layout, zero-crossover distortion behavior, CMRR stability across rail-to-rail common-mode range, and validated alternatives for precision sensor interface and data acquisition designs.
Technical Context
The OPA2325IDR employs an internal charge pump to power a single linear input differential pair, eliminating crossover distortion across its full input common-mode range (V– – 0.1 V to V+ + 0.1 V). This architecture sustains 114 dB typical CMRR and <150 µV offset over temperature and supply variation.
It features e-trim™ technology for factory-trimmed DC precision, 0.2 pA typical input bias current, unity-gain stability with ≥15 pF capacitive load drive, and PSRR >100 dB up to 100 kHz - making it suitable for unregulated single-cell Li-ion or 3.3 V industrial supply environments without external regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing filter integration before SAR ADC sampling. |
| Input Offset Voltage (max) | 150 µV - ensures ≤0.0024% full-scale error in 65536-count (16-bit) ADC systems with ±2.5 V reference. |
| Slew Rate | 5 V/µs - settles 2 V step within 0.6 µs to 0.1%, meeting timing budgets for 1 MSPS+ successive-approximation converters. |
| Input Voltage Noise Density | 9 nV/√Hz at 10 kHz - contributes <1.8 µV RMS noise in 100 kHz bandwidth, preserving ENOB in precision measurement paths. |
| Supply Range | 2.2 V to 5.5 V single supply - enables direct operation from coin-cell, Li-ion, or 3.3 V logic rails without LDO overhead. |
| Quiescent Current per Channel | 650 µA - draws only 1.3 mA total for dual-channel operation, extending battery life in portable instrumentation. |
| CMRR (typ) | 114 dB - maintains signal integrity when amplifying low-level sensor outputs in noisy industrial ground environments. |
Pinout & Package
OPA2325IDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal resistance RθJA = 119°C/W supports operation up to +125°C ambient in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC input or active filter stage; rail-to-rail swing within 10 mV of supply rails. |
| 2 | –IN A | Inverting input channel A - accepts feedback network for inverting configurations or transimpedance gain setting. |
| 3 | +IN A | Noninverting input channel A - connects to high-Z sensor node or reference divider; 0.2 pA bias current minimizes loading. |
| 4 | V– | Negative supply terminal - tied to GND in single-supply use; supports dual-supply operation down to ±1.1 V. |
| 5 | +IN B | Noninverting input channel B - independent high-impedance node for second sensor or reference path. |
| 6 | –IN B | Inverting input channel B - used for differential sensing or second feedback loop; matched to channel A performance. |
| 7 | OUT B | Amplifier B output - provides simultaneous signal conditioning for dual-channel data acquisition or redundancy. |
| 8 | V+ | Positive supply terminal - accepts 2.2 V to 5.5 V; PSRR >100 dB ensures immunity to digital supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Eliminates CMRR degradation at rail transitions, enabling consistent 114 dB rejection across full VCM range (V– – 0.1 V to V+ + 0.1 V). |
| e-trim™ DC precision | Factory-trimmed 150 µV max VOS and 7.5 µV/°C drift - reduces calibration burden in production test and field operation. |
| Rail-to-rail I/O | Input extends 100 mV beyond supplies; output swings to within 10 mV of rails - maximizes dynamic range in low-voltage systems. |
| Low-power wideband operation | 650 µA/ch quiescent current with 10 MHz GBW - achieves 15,385 MHz/mA efficiency, outperforming legacy precision op-amps. |
| High PSRR & CMRR | 114 dB CMRR and >100 dB PSRR up to 100 kHz - rejects supply noise and common-mode interference in mixed-signal PCBs. |
Applications
| High-Z Sensor Signal Conditioning | Transimpedance Amplifier (TIA) |
|---|---|
Use Scenario: Amplifying microamp-level photocurrent from photodiodes in portable gas analyzers with 16-bit ADC digitization. IC Role / Device Role / Timing Role: Precision TIA front-end with ultra-low input bias current (0.2 pA) and low 9 nV/√Hz noise to preserve SNR. Use Value: Enables sub-ppm gas detection resolution by minimizing Johnson and input-current noise contributions in 100 kΩ–10 MΩ feedback networks. |
Use Scenario: Converting output current from MEMS accelerometers into low-noise voltage for vibration monitoring in predictive maintenance edge nodes. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage preceding SAR ADC; zero-crossover design prevents distortion during rail-to-rail signal excursions. Use Value: Delivers 0.0005% THD+N at 10 kHz, ensuring accurate FFT-based spectral analysis without harmonic aliasing. |
| Programmable Logic Controller (PLC) Analog Input Module | SAR ADC Driver for Battery-Powered Data Loggers |
Use Scenario: Conditioning 4–20 mA loop signals and thermocouple outputs in industrial control cabinets with 24 V supply. IC Role / Device Role / Timing Role: Rail-to-rail input amplifier with 114 dB CMRR rejecting common-mode noise on long sensor cables. Use Value: Maintains <0.005% linearity error across –40°C to +85°C, eliminating need for per-channel temperature compensation firmware. |
Use Scenario: Driving 16-bit SAR ADC inputs in solar-powered environmental sensors operating from 3.3 V LDO or direct LiFePO₄ cell. IC Role / Device Role / Timing Role: Low-quiescent-current (650 µA/ch), wide-supply-range (2.2–5.5 V) driver enabling >1-year battery life. Use Value: Sustains 10 MHz bandwidth and 5 V/µs slew rate even at 2.2 V supply, preserving acquisition speed during battery discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDR | Lower offset (4 µV max), higher IQ (560 µA/ch), 10 MHz GBW - uses auto-zero architecture instead of zero-crossover. | Better DC accuracy but higher 1/f noise; less suitable for AC-coupled sensor paths above 10 Hz. | Choose OPA2182IDR when ultra-low drift (<0.003 µV/°C) dominates over broadband noise floor in DC-coupled systems. |
| AD8605ARMZ | 5 V/µs slew rate, 10 MHz GBW, 65 µV max VOS, but no zero-crossover - exhibits CMRR drop near supply rails. | Higher CMRR degradation at VCM > V+ – 0.5 V limits usable input range in rail-to-rail designs. | Choose AD8605ARMZ when cost sensitivity outweighs requirement for flat CMRR across full input range. |
Compared with OPA2325IDR, OPA2182IDR offers superior DC precision at the expense of higher 1/f noise and reduced AC linearity, while AD8605ARMZ trades guaranteed rail-to-rail CMRR stability for lower unit cost and marginally better offset - making OPA2325IDR optimal for wide-dynamic-range, battery-operated SAR ADC drivers where both DC accuracy and AC fidelity are critical.
Availability
OPA2325IDR is available at Aetrix Electronics and suitable for high-Z sensor signal conditioning, transimpedance amplification, and SAR ADC driving requiring stable component supply across automotive, industrial, and portable instrumentation programs.
Supply support for OPA2325IDR 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 solutions.
The OPAx325 family was designed specifically for high-resolution data acquisition systems needing low-noise, rail-to-rail, low-power amplification - particularly as SAR ADC drivers in battery-powered and industrial measurement equipment.
FAQ
What is the maximum operating temperature for OPA2325IDR?
The OPA2325IDR is specified for operation from –40°C to +125°C ambient temperature. Its thermal resistance RθJA = 119°C/W in SOIC-8 allows reliable performance in industrial control enclosures and automotive under-hood environments when PCB copper area meets recommended layout guidelines.
Does OPA2325IDR support dual-supply operation?
Yes, OPA2325IDR supports dual-supply operation from ±1.1 V to ±2.75 V. The device maintains full rail-to-rail input common-mode range (V– – 0.1 V to V+ + 0.1 V) and output swing (within 10 mV of rails) under dual-supply conditions, enabling bipolar signal handling in precision instrumentation.
Can OPA2325IDR drive capacitive loads without instability?
OPA2325IDR is unity-gain stable and characterized to drive ≥15 pF capacitive loads without peaking or oscillation. For loads >100 pF, TI recommends adding a small series resistor (10–50 Ω) between amplifier output and capacitance to maintain phase margin above 67°.
What is the input bias current specification for OPA2325IDR?
OPA2325IDR has a typical input bias current of ±0.2 pA at 25°C, with a maximum of ±10 pA over –40°C to +125°C. This ultra-low value minimizes voltage error across high-impedance sensor sources such as pH electrodes or piezoresistive bridges.
How does the zero-crossover architecture improve CMRR in OPA2325IDR?
The OPA2325IDR uses an internal charge pump to bias a single MOS differential pair across the entire input common-mode range, eliminating the offset discontinuity seen in traditional complementary-input CMOS op-amps. This yields flat 114 dB CMRR from V– – 0.1 V to V+ + 0.1 V - critical for rejecting noise in unshielded sensor cables.
OPA2325IDR 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:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 650µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 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-SOIC
OPA2325IDR FAQ
1.How can I place an order for OPA2325IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2325IDR 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 OPA2325IDR reliable?
The price and inventory of OPA2325IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2325IDR is usually 5 days.
3.What payment methods are accepted for OPA2325IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2325IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2325IDR?
OPA2325IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2325IDR 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 OPA2325IDR?
For technical support, including OPA2325IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2325IDR requirements.
6.How does Aetrix verify that OPA2325IDR is sourced from the original manufacturer or authorized distributors?
All OPA2325IDR 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 OPA2325IDR meets industry standards.
7.What is the process for return or replacement of OPA2325IDR?
All OPA2325IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2325IDR, 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 OPA2325IDR part is unused and in its original packaging.
Return procedure for OPA2325IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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