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Texas Instruments OPA4323IPWR
- Part No.:
- OPA4323IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4323IPWR.pdf
- Description:
- QUAD, 5.5-V, 20-MHZ, ZERO-CROSS
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
OPA4323IPWR from Texas Instruments is a quad-channel, rail-to-rail input/output zero-crossover 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, and ±150µV typical input offset voltage - enabling accurate ADC driver and high-side current sensing in industrial motor control and ultrasonic transducer interfaces.
For engineers reviewing the OPA4323IPWR datasheet, OPA4323IPWR pinout, OPA4323IPWR application, or OPA4323IPWR equivalent, key selection criteria include its zero-crossover architecture for rail-to-rail linearity, fast 200ns 0.01% settling time, low 5.5nV/√Hz noise at 10kHz, ±110mA output drive capability at 5.5V, and operation across –40°C to +125°C.
Technical Context
The OPA4323IPWR employs a zero-crossover input stage that eliminates crossover distortion across the full input common-mode range (V– – 0.2V to V+ + 0.15V), ensuring consistent precision for both low- and high-side sensing. Its unity-gain stable architecture supports direct driving of ADC inputs with minimal external compensation.
It features internal RFI/EMI filtering on input pins (62dB EMI rejection at 1.8GHz), drives up to 150pF capacitive loads without oscillation, and maintains 100dB minimum CMRR over temperature - critical for high-gain wheatstone bridge and photodiode amplifier applications requiring low drift (±2µV/°C max) and thermal stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 20MHz - enables <5MSPS ADC sampling with sub-0.01% settling error in single-supply configurations. |
| Slew rate | 33V/μs - supports fast fault detection in motor current sensing and high-fidelity audio pre-amplification. |
| CMRR | 114dB typical - rejects power supply and ground noise in precision sensor front-ends like strain gauges. |
| Input offset voltage | ±150µV typical - ensures ≤0.003% gain error in 12-bit+ measurement systems at room temperature. |
| Quiescent current | 1.6mA per channel - allows four independent amplifiers in space-constrained, battery-sensitive designs. |
| Operating temperature | –40°C to +125°C - qualified for automotive under-hood, industrial PLC, and solar inverter environments. |
| Output drive | ±110mA at 5.5V - directly interfaces with 600Ω audio loads or drives 10kΩ ADC reference buffers without external buffering. |
Pinout & Package
OPA4323IPWR is housed in a 14-pin TSSOP (PW) package measuring 5mm × 6.4mm, with exposed thermal pad connected to V– for enhanced thermal performance (RθJA = 115.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Output, channel 1 | Full rail-to-rail swing (within 25mV of rails at 5.5V); capable of sourcing/sinking ±110mA. |
| IN1– (Pin 2) | Inverting input, channel 1 | Zero-crossover stage enables linear response down to V– – 0.2V; EMI-filtered. |
| IN1+ (Pin 3) | Noninverting input, channel 1 | Common-mode range extends beyond rails; supports single-supply operation with V– = GND. |
| V+ (Pin 4) | Positive supply | Accepts 1.7V–5.5V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin. |
| IN2+ (Pin 5) | Noninverting input, channel 2 | Electrically isolated from other channels; identical specs to IN1+. |
| IN2– (Pin 6) | Inverting input, channel 2 | Matched offset and bias current to IN1–; supports differential pair configuration. |
| OUT2 (Pin 7) | Output, channel 2 | Independent output stage; no crosstalk to OUT1 above –84dB at 10kHz. |
| OUT3 (Pin 8) | Output, channel 3 | Same drive strength and settling behavior as OUT1; validated for simultaneous 4-channel use. |
| IN3– (Pin 9) | Inverting input, channel 3 | Part of fully matched quad topology; offset drift ≤2µV/°C across all channels. |
| IN3+ (Pin 10) | Noninverting input, channel 3 | Supports high-impedance sensor interfaces (ZICM = 100GΩ || 1pF). |
| V– (Pin 11) | Negative supply / ground | Reference for thermal pad connection; must be low-impedance for optimal EMI immunity. |
| IN4+ (Pin 12) | Noninverting input, channel 4 | Enables 4-channel synchronous acquisition in data loggers or multi-axis motor encoders. |
| IN4– (Pin 13) | Inverting input, channel 4 | Validated for transimpedance gain up to 107V/A with 150pF load stability. |
| OUT4 (Pin 14) | Output, channel 4 | Delivers same 200ns 0.01% settling as OUT1; tested with 10pF–150pF capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Eliminates distortion at signal zero-crossing points - essential for high-fidelity audio preamps and rotary encoder sine/cosine decoding. |
| Rail-to-rail I/O | Supports full dynamic range utilization in 1.8V microcontroller systems without level-shifting circuitry. |
| 20MHz GBW + 33V/μs SR | Meets settling requirements for 12-bit ADCs sampling at 2MSPS with <0.01% error. |
| 114dB CMRR | Maintains accuracy in noisy industrial environments where supply ripple exceeds 100mVpp. |
| Internal RFI/EMI filtering | 62dB rejection at 1.8GHz - prevents cellular or Wi-Fi interference from corrupting low-level sensor signals. |
| –40°C to +125°C operation | Qualified per AEC-Q100 Grade 1 - suitable for automotive body control modules and EV battery monitoring units. |
Applications
| Amplifier Driver for ADCs | High-Side Current Sensing |
|---|---|
Use Scenario: Driving SAR or sigma-delta ADC inputs in motor control inverters with 12–16-bit resolution and 0.5–5MSPS sampling rates. IC Role / Device Role / Timing 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 ensures full-scale step accuracy without dead-time insertion; 114dB CMRR rejects switching noise from adjacent IGBT gate drivers. | Use Scenario: Measuring phase current in three-phase BLDC motor drives using shunt resistors referenced to high-voltage bus (e.g., 400V DC link). IC Role / Device Role / Timing Role: High-common-mode-voltage difference amplifier with matched input pairs and ultra-low offset drift. Use Value: ±150µV offset and ±2µV/°C drift enable <0.5% current measurement error over full temperature range without calibration. |
| Motor Rotary Encoders | Transimpedance Photodiode Amplifiers |
Use Scenario: Conditioning analog sine/cosine outputs from optical or magnetic resolvers in servo positioning systems. IC Role / Device Role / Timing Role: Low-noise, low-distortion signal conditioner preserving phase coherence between quadrature channels. Use Value: 5.5nV/√Hz noise floor and zero-crossover architecture prevent harmonic generation that degrades interpolation accuracy. | Use Scenario: Converting nanoampere-level photocurrents from medical pulse oximetry or environmental gas sensors into measurable voltage signals. IC Role / Device Role / Timing Role: Low-input-bias-current (±0.5pA typ), high-gain transimpedance amplifier with stable 150pF load drive. Use Value: Input bias current <1pA minimizes dark-current-induced offset; 20MHz GBW supports >100kHz modulation bandwidths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4197IPWR | Higher 10MHz GBW, lower 5.2nV/√Hz noise, but only 10V/μs slew rate and no zero-crossover architecture. | Better for low-noise DC-coupled sensor interfaces; unsuitable for fast-settling ADC drivers or zero-crossing sensitive audio paths. | Select OPA4197IPWR when ultra-low noise dominates over speed and linearity at signal zero crossings. |
| LMV881MTX/NOPB | Lower 10MHz GBW, 1.2mA/ch quiescent current, no EMI filtering, and only 90dB CMRR at 1.8V. | Cost-optimized for consumer-grade audio and basic industrial sensing where 12-bit accuracy suffices. | Choose LMV881MTX/NOPB for non-critical, cost-sensitive designs lacking EMI exposure or high-precision timing demands. |
Compared with OPA4323IPWR, OPA4197IPWR trades speed and zero-crossover linearity for lower noise and higher DC precision, while LMV881MTX/NOPB sacrifices CMRR, EMI immunity, and settling performance to reduce BOM cost - making OPA4323IPWR the optimal choice for high-fidelity, high-speed, and high-reliability signal chains.
Availability
OPA4323IPWR is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and medical diagnostic equipment requiring stable component supply and long-term production continuity.
Supply support for OPA4323IPWR 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 innovation in precision amplifiers and signal chain solutions.
The OPAx323 family was engineered specifically for high-speed, high-accuracy signal conditioning in low-voltage, rail-to-rail systems - targeting ADC drivers, current sensing, and sensor interface applications demanding zero-crossover linearity and wide temperature operation.
FAQ
What is the maximum capacitive load the OPA4323IPWR can drive without oscillation?
The OPA4323IPWR is characterized to drive up to 150pF capacitive loads without sustained oscillations, verified across all four channels in the TSSOP package. This capability eliminates the need for external isolation resistors in ADC driver and photodiode amplifier configurations where layout parasitics or input capacitance exceed typical values. For loads >150pF, a series resistor (typically 10–50Ω) at the output is recommended to maintain phase margin.
Does the OPA4323IPWR support true single-supply operation with V– tied to ground?
Yes, the OPA4323IPWR supports true single-supply operation with V– = GND. Its rail-to-rail input stage accepts common-mode voltages from (V–) – 0.2V to (V+) + 0.15V, and its output swings within 25mV of each rail at 5.5V supply. This enables direct interfacing with 1.8V–5.5V microcontrollers and ADCs without level-shifting components - confirmed in TI's SBOSAE8C datasheet Section 6.7.
What is the typical input offset voltage drift over temperature for the OPA4323IPWR?
The OPA4323IPWR exhibits a typical input offset voltage drift of ±0.4µV/°C, with a maximum of ±1.8µV/°C over the full –40°C to +125°C operating range. This low drift, combined with ±150µV typical initial offset, ensures minimal gain error in high-precision Wheatstone bridge and thermopile amplifier applications - validated in Section 6.7 of the official datasheet and Figure 6-2.
How does the zero-crossover architecture of the OPA4323IPWR improve performance in audio microphone pre-amplifiers?
The zero-crossover architecture in the OPA4323IPWR eliminates crossover distortion at signal zero crossings, preserving harmonic integrity and reducing THD+N to 0.00125% at 10kHz. This enables clean amplification of low-level electret microphone signals without introducing audible artifacts - especially critical in professional audio interfaces and voice-controlled IoT devices where signal fidelity directly impacts speech recognition accuracy.
Is the OPA4323IPWR pin-compatible with any other Texas Instruments quad op amps?
No, the OPA4323IPWR (14-pin TSSOP) is not pin-compatible with other TI quad op amps such as the OPA4340 or OPA4197, which use different pinouts for supply, input, and output terminals. The OPA4323IPWR follows a dedicated channel-interleaved layout (e.g., IN1+, IN1–, OUT1, V+, IN2+, etc.) optimized for low crosstalk and thermal symmetry - requiring PCB redesign for substitution. Always verify pin mapping against TI's SBOSAE8C datasheet Figure 5-8.
OPA4323IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-TSSOP
OPA4323IPWR FAQ
1.How can I place an order for OPA4323IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4323IPWR 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 OPA4323IPWR reliable?
The price and inventory of OPA4323IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4323IPWR is usually 5 days.
3.What payment methods are accepted for OPA4323IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4323IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4323IPWR?
OPA4323IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4323IPWR 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 OPA4323IPWR?
For technical support, including OPA4323IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4323IPWR requirements.
6.How does Aetrix verify that OPA4323IPWR is sourced from the original manufacturer or authorized distributors?
All OPA4323IPWR 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 OPA4323IPWR meets industry standards.
7.What is the process for return or replacement of OPA4323IPWR?
All OPA4323IPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4323IPWR, 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 OPA4323IPWR part is unused and in its original packaging.
Return procedure for OPA4323IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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