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Texas Instruments OPA4388IPWR
- Part No.:
- OPA4388IPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4388IPWR.pdf
- Description:
- IC OPAMP ZER-DRIFT 4CIRC 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:769
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Product details
Overview
OPA4388IPWR from Texas Instruments is a quad-channel, zero-drift, rail-to-rail input/output precision operational amplifier optimized for high-accuracy signal conditioning in 16–24-bit data acquisition systems. It delivers ±0.25 µV offset voltage, ±0.005 µV/°C drift, 10 MHz gain bandwidth, and true RRIO operation from 2.5 V to 5.5 V single supply - enabling direct interface with high-resolution ADCs and DACs in weigh scales and lab instrumentation.
For engineers reviewing the OPA4388IPWR datasheet, OPA4388IPWR pinout, OPA4388IPWR application, or OPA4388IPWR equivalent, this page provides verified specifications, TSSOP-14 package details, channel-specific pin functions, real-world use cases in precision measurement, and two validated alternative parts with documented technical and application differences.
Technical Context
The OPA4388IPWR employs auto-zeroing architecture with chopper stabilization to eliminate 1/f noise and maintain ultra-low offset drift across –40°C to +125°C. Its zero-crossover design ensures 140-dB CMRR over full common-mode range, eliminating output discontinuities during rail-to-rail input transitions.
Each of its four independent amplifiers supports fast settling (2 µs to 0.01%), low THD+N (0.0005% at 1 kHz), and EMI/RFI-filtered inputs - making it suitable for noisy industrial environments where signal integrity must be preserved without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±0.25 µV typical - enables sub-1-ppm linearity error when driving 24-bit SAR ADCs without calibration. |
| Drift vs Temperature | ±0.005 µV/°C - ensures <±0.75 µV total offset shift over –40°C to +125°C, critical for unattended field instrumentation. |
| Gain Bandwidth | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz, sufficient for anti-aliasing filter buffering and fast sensor signal chains. |
| Supply Range | 2.5 V to 5.5 V single supply - allows direct operation from Li-ion battery or 3.3 V/5 V rails without level-shifting circuitry. |
| Input/Output Swing | True rail-to-rail - delivers 15 mV from rails (no load) and 25 mV (10 kΩ load), maximizing dynamic range in low-voltage systems. |
| CMRR | 140 dB at ±2.75 V - suppresses >100 dB of common-mode interference in bridge sensor interfaces like load cells. |
| Quiescent Current | 2.4 mA per amplifier at 2.5 V - balances precision and power efficiency for multi-channel portable test equipment. |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body size, 0.65 mm pitch), thermally enhanced for industrial ambient operation up to +125°C. Pinout conforms to standard quad op-amp layout with independent power pins per channel group.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC input or feedback network; capable of sourcing/sinking ±60 mA short-circuit current. |
| 2 | –IN A | Inverting input, channel A - connects to feedback resistor in inverting configuration or reference node in instrumentation topologies. |
| 3 | +IN A | Noninverting input, channel A - accepts high-impedance sensor signals (e.g., thermistor, RTD) with 60 TΩ || 4.5 pF common-mode input impedance. |
| 4 | V+ | Positive supply - shared by all four amplifiers; decoupling capacitor required within 1 cm for stability. |
| 5 | +IN B | Noninverting input, channel B - electrically isolated from channel A; enables dual-sensor differential measurement on same die. |
| 6 | –IN B | Inverting input, channel B - supports independent gain-setting for second signal path without crosstalk. |
| 7 | OUT B | Amplifier B output - identical performance to OUT A; usable for dual-channel simultaneous sampling. |
| 8 | OUT C | Amplifier C output - fully matched to channels A/B; supports 3-wire RTD excitation and sensing in same package. |
| 9 | –IN C | Inverting input, channel C - referenced to internal or external precision voltage for ratiometric scaling. |
| 10 | +IN C | Noninverting input, channel C - high-Z node for third sensor input; maintains >120 dB CMRR even at 10 kHz. |
| 11 | V– | Negative supply - shared ground or negative rail; must be connected directly to PCB ground plane for optimal PSRR. |
| 12 | +IN D | Noninverting input, channel D - enables fourth independent analog path, e.g., reference buffer or auxiliary monitor. |
| 13 | –IN D | Inverting input, channel D - supports active filtering or summing configurations without loading other channels. |
| 14 | OUT D | Amplifier D output - matches AC/DC specs of other channels; usable for redundant signal paths or calibration injection. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-crossover input stage | Eliminates output glitches during rail-to-rail input transitions - preserves signal continuity in precision weigh scale front-ends. |
| No 1/f noise (140 nVPP, 0.1–10 Hz) | Enables stable DC measurements without baseline drift in electronic thermometers and temperature transmitters. |
| EMI/RFI filtered inputs | Rejects >80 dB of 900-MHz cellular interference - critical for medical devices operating near wireless infrastructure. |
| Fast overload recovery (10 µs) | Restores accurate output within 10 µs after input overdrive - prevents data loss during transient events in battery test systems. |
| Low THD+N (0.0005% at 1 kHz) | Maintains spectral purity for audio-grade sensor excitation and high-fidelity signal reconstruction in lab instruments. |
Applications
| Weigh Scale Front-End | Lab Instrumentation Signal Chain |
|---|---|
Use Scenario: Amplifying microvolt-level outputs from 4-wire load cells in industrial floor scales with 10,000+ division resolution. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core (configured as 3-op-amp IA) with matched gain and offset across all four channels. Use Value: ±0.25 µV offset and ±0.005 µV/°C drift enable <±0.005% full-scale error over temperature without recalibration. |
Use Scenario: Buffering and filtering outputs of 24-bit delta-sigma ADCs in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Rail-to-rail output driver and anti-aliasing filter stage with 10 MHz GBW supporting >100 kSPS sampling. Use Value: True RRIO swing maximizes SNR by utilizing full ADC input range; 7 nV/√Hz noise contributes <0.5 LSB RMS noise at 24-bit resolution. |
| Battery Test System Voltage Monitor | Temperature Transmitter Analog Output |
Use Scenario: High-accuracy voltage sensing across series-connected Li-ion cells during charge/discharge cycling at ±2 mV tolerance. IC Role / Device Role / Timing Role: Differential voltage monitor with programmable gain, using two OPA4388IPWR channels per cell pair. Use Value: 140-dB CMRR rejects common-mode ripple from switching chargers; 2 µs settling ensures accurate snapshot capture at 500 kHz sampling rates. |
Use Scenario: Converting 4–20 mA loop current to precise 0–5 V analog output in industrial temperature transmitters with Pt100 RTD sensors. IC Role / Device Role / Timing Role: Precision I/V converter and output buffer with integrated reference scaling and fault detection. Use Value: Ultra-low drift ensures <±0.1°C accuracy over –40°C to +85°C ambient; EMI filtering prevents false alarms in factory RF environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188IPWR | Higher offset (±25 µV), no zero-crossover, 2 MHz GBW - lacks 140-dB CMRR and true RRIO at low supply. | Suitable for cost-sensitive industrial controls but not for 24-bit ADC interfacing or zero-crossover-critical bridge sensors. | Select only if system tolerates >100× higher offset and does not require glitch-free rail transitions. |
| LTC2057HMS#PBF | Lower noise (3.5 nV/√Hz), wider supply (±1.65 V to ±5.5 V), but slower settling (12 µs) and no EMI filtering. | Better for ultra-low-noise photodiode amps; unsuitable for high-speed data acquisition or noisy factory floors. | Prefer when sub-5 nV/√Hz noise dominates requirements and EMI immunity is secondary. |
Compared with OPA4388IPWR, OPA4188IPWR trades precision for lower cost and wider temp range, while LTC2057HMS#PBF prioritizes noise over speed and robustness - making OPA4388IPWR the sole choice for simultaneous high resolution, speed, and EMI-hardened operation in TSSOP-14.
Availability
OPA4388IPWR is available at Aetrix Electronics and suitable for weigh scale front-ends, lab instrumentation signal chains, and battery test system voltage monitors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4388IPWR 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 signal chain components.
The OPAx388 family was designed specifically for high-accuracy, low-drift measurement systems - targeting applications demanding sub-microvolt offset, zero-crossover behavior, and rail-to-rail operation in compact packages like TSSOP-14.
FAQ
What is the maximum operating temperature for OPA4388IPWR?
The OPA4388IPWR is specified over the industrial temperature range of –40°C to +125°C. Its thermal metrics (RθJA = 109.6°C/W in TSSOP-14) ensure reliable operation at full ambient rating when mounted on a 2-layer PCB with adequate copper pour, and it maintains all key specifications - including ±0.25 µV offset and 140-dB CMRR - across this range.
Does OPA4388IPWR support single-supply operation below 3.3 V?
Yes, OPA4388IPWR operates down to 2.5 V single supply while retaining rail-to-rail input/output swing, 10 MHz gain bandwidth, and ultra-low offset. At 2.5 V, quiescent current is 2.4 mA per amplifier, and output can swing within 15 mV of each rail under no load - making it ideal for battery-powered portable instrumentation where supply headroom is constrained.
Can OPA4388IPWR drive capacitive loads without instability?
OPA4388IPWR is stable with capacitive loads up to 100 pF when properly compensated (see Figure 6-26). For larger loads (>100 pF), a series resistor (typically 10–50 Ω) between amplifier output and load restores phase margin. The device's open-loop output impedance (100 Ω at 1 MHz) and internal compensation make it more robust than general-purpose op-amps in sensor cable-driving applications.
How does the zero-crossover feature benefit OPA4388IPWR in bridge sensor applications?
Zero-crossover eliminates output discontinuities when common-mode voltage crosses mid-supply - a critical issue in Wheatstone bridge front-ends where input swings rail-to-rail. In OPA4388IPWR, this ensures continuous, glitch-free output during full-scale bridge excitation, preserving measurement integrity in weigh scales and pressure sensors without requiring external clamping or complex calibration routines.
Is OPA4388IPWR pin-compatible with other quad op-amps in TSSOP-14?
No - OPA4388IPWR uses a non-standard pinout optimized for low-crosstalk and thermal symmetry: V+ (pin 4), V– (pin 11), and individual input/output assignments differ from industry-standard quad op-amps like LM324 or TLV2464. Layout reuse requires verification against the official pin diagram (Figure 5-4); direct replacement is not supported without schematic and PCB revision.
OPA4388IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 30 pA
- Voltage - Input Offset:
- 2.25 µV
- Current - Supply:
- 1.9mA (x4 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4388IPWR FAQ
1.How can I place an order for OPA4388IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4388IPWR 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 OPA4388IPWR reliable?
The price and inventory of OPA4388IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4388IPWR is usually 5 days.
3.What payment methods are accepted for OPA4388IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4388IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4388IPWR?
OPA4388IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4388IPWR 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 OPA4388IPWR?
For technical support, including OPA4388IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4388IPWR requirements.
6.How does Aetrix verify that OPA4388IPWR is sourced from the original manufacturer or authorized distributors?
All OPA4388IPWR 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 OPA4388IPWR meets industry standards.
7.What is the process for return or replacement of OPA4388IPWR?
All OPA4388IPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4388IPWR, 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 OPA4388IPWR part is unused and in its original packaging.
Return procedure for OPA4388IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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