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Texas Instruments OPA4347EA/2K5
- Part No.:
- OPA4347EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4347EA/2K5.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,648
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Product details
Overview
OPA4347EA/2K5 from Texas Instruments is a quad, rail-to-rail input/output operational amplifier optimized for ultra-low-power portable and battery-powered systems. It delivers 350kHz gain-bandwidth, 20µA per-channel quiescent current, rail-to-rail swing within 5mV of supply rails (at light load), and operates from 2.3V to 5.5V single supply - enabling precision signal conditioning in smoke detectors and 2-wire transmitters.
For engineers reviewing the OPA4347EA/2K5 datasheet, OPA4347EA/2K5 pinout, OPA4347EA/2K5 application, or OPA4347EA/2K5 equivalent, key selection criteria include verified microPower operation (≤34µA/channel max), guaranteed –55°C to +125°C temperature range, TSSOP-14 package compatibility, and confirmed rail-to-rail I/O performance across full supply and temperature range.
Technical Context
The OPA4347EA/2K5 implements a complementary differential input stage (N- and P-channel pairs) enabling rail-to-rail common-mode input range extending 200mV beyond V– and V+, with a defined 400mV transition region where both pairs are active. Its class AB output stage supports rail-to-rail output swing down to 5mV from rails at 100kΩ load.
It is unity-gain stable and specified for capacitive load drive up to 250pF in unity-gain buffer configuration. Input bias current remains ultra-low (±0.5pA typ) across temperature, and PSRR/CMRR are characterized separately for operation below and across the input transition region to support accurate low-voltage design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 20µA per channel (typ), ≤34µA max - enables multi-year battery life in CO/smoke detectors. |
| Gain-Bandwidth Product | 350kHz - supports bandwidth-critical sensor buffering (e.g., electret mic preamp) without excessive power penalty. |
| Input Voltage Range | (V–) – 0.2V to (V+) + 0.2V - allows direct interfacing to over-rail sensor outputs or level-shifted signals. |
| Output Swing (100kΩ) | Within 5mV of V+ and V– - preserves >99% dynamic range in 3.3V or 5V systems. |
| Supply Voltage Range | 2.3V to 5.5V single supply - compatible with Li-ion, coin cell, and regulated 3.3V/5V rails. |
| Operating Temperature | –55°C to +125°C - qualified for industrial and automotive under-hood sensor modules. |
| Input Offset Voltage | 2mV (min), 6mV (max) - sufficient for 12-bit ADC driving without trimming in cost-sensitive applications. |
Pinout & Package
TSSOP-14 surface-mount package (Package Drawing PW), 5.0mm × 4.4mm footprint, 0.65mm pitch, JEDEC-standard lead finish (NiPdAu), MSL Level-2-260°C-1 YEAR.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives high-impedance loads (≥100kΩ) to within 5mV of rails. |
| 2 | –In A | Inverting input of Amp A - part of complementary input pair active near V+. |
| 3 | +In A | Non-inverting input of Amp A - part of complementary input pair active near V–. |
| 4 | V– | Negative supply (GND in single-supply use) - shared return for all four amplifiers. |
| 5 | +In C | Non-inverting input of Amp C - identical electrical behavior to Pin 3. |
| 6 | –In C | Inverting input of Amp C - identical electrical behavior to Pin 2. |
| 7 | Out C | Amplifier C output - electrically isolated from Out A/B/D; supports independent feedback networks. |
| 8 | Out A | Amplifier A output - duplicate labeling per TI schematic convention (Pin 1 = Out A). |
| 9 | –In A | Inverting input of Amp A - duplicate labeling per TI schematic convention (Pin 2 = –In A). |
| 10 | +In A | Non-inverting input of Amp A - duplicate labeling per TI schematic convention (Pin 3 = +In A). |
| 11 | V+ | Positive supply - decoupling capacitor (0.01µF ceramic) required adjacent to this pin. |
| 12 | +In B | Non-inverting input of Amp B - shares same input stage architecture as Pins 3/5/13. |
| 13 | –In B | Inverting input of Amp B - shares same input stage architecture as Pins 2/6/12. |
| 14 | Out B | Amplifier B output - fully independent output stage; no crosstalk specification provided. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with 200mV beyond rails | Enables direct connection to sensors whose output exceeds supply (e.g., thermopile, photodiode transimpedance output) without external level-shifting. |
| 350kHz GBW at 20µA IQ | Delivers usable bandwidth for 12-bit ADC drivers and smoke detector analog front-ends while consuming <140µA total for quad channel. |
| Specified –55°C to +125°C operation | Validates performance in unregulated environments like HVAC ducts or automotive cabin air quality modules. |
| 0.17V/µs slew rate | Supports clean step response for 20µs settling (0.1%) in unity-gain configurations driving 100kΩ loads. |
| Input bias current ≤10pA (max) | Minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric elements). |
Applications
| Portable Gas Detection | Battery-Powered Instrumentation |
|---|---|
Use Scenario: CO and smoke detectors using electrochemical or optical sensing elements requiring low-drift, rail-to-rail buffering before 12-bit ADC sampling. IC Role / Device Role / Timing Role: Quad amplifier provides simultaneous signal conditioning for sensor reference, measurement channel, temperature compensation, and alarm driver. Use Value: 20µA/channel IQ extends 10-year battery life; rail-to-rail I/O captures full sensor dynamic range on 3.3V supply. | Use Scenario: Handheld multimeters and portable data loggers measuring mV-level thermocouple or RTD outputs. IC Role / Device Role / Timing Role: Precision op amp configured as programmable-gain instrumentation amplifier front-end with selectable gain paths. Use Value: 2mV max offset and 3µV/°C drift ensure <0.1% accuracy over –20°C to +70°C operating range without calibration. |
| 2-Wire Loop Transmitters | Low-Power Sensor Signal Chains |
Use Scenario: Industrial 4–20mA transmitters powered from loop voltage (12–42V) with internal 3.3V LDO supplying analog front-end. IC Role / Device Role / Timing Role: Amplifier stages condition sensor output, generate reference voltage, and drive DAC-controlled current source. Use Value: 2.3V minimum supply enables operation with headroom-limited LDOs; 34µA max IQ minimizes self-heating in sealed enclosures. | Use Scenario: Wireless environmental sensors (temperature/humidity/air quality) with integrated MCU and BLE radio. IC Role / Device Role / Timing Role: Single-chip quad op amp handles analog multiplexing, filtering, gain setting, and ADC input buffering in compact PCB layout. Use Value: TSSOP-14 package reduces board area vs discrete SO-14 alternatives; guaranteed 125°C operation supports reflow and field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4348AIDR | Higher GBW (1MHz), higher IQ (45µA/channel), same rail-to-rail I/O, same TSSOP-14 package. | Better for higher-speed sensor interfaces (e.g., ultrasonic time-of-flight), but reduces battery life by ~2.2× vs OPA4347EA/2K5. | Select when bandwidth >500kHz is required and power budget allows ≥180µA total quiescent draw. |
| LMV4342QDGKR | Lower IQ (15µA/channel), lower GBW (220kHz), automotive-grade (AEC-Q100), same TSSOP-14 footprint. | Qualified for automotive cabin air quality modules; lacks extended –55°C spec of OPA4347EA/2K5. | Select for automotive production programs requiring AEC-Q100 qualification and slightly lower power. |
Compared with OPA4348AIDR and LMV4342QDGKR, the OPA4347EA/2K5 uniquely balances sub-35µA/channel IQ, 350kHz bandwidth, and –55°C to +125°C operation - making it optimal for industrial gas detection and long-life battery-powered instrumentation where thermal robustness and microPower coexist.
Availability
OPA4347EA/2K5 is available at Aetrix Electronics and suitable for portable gas detection, battery-powered instrumentation, and 2-wire transmitter designs requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA4347EA/2K5 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 expertise in precision op amps and low-power signal chain solutions.
The OPA347 family - including OPA4347EA/2K5 - was designed specifically for ultra-low-power, rail-to-rail signal conditioning in space-constrained, battery-operated sensor systems across industrial, medical, and environmental monitoring markets.
FAQ
What is the maximum capacitive load the OPA4347EA/2K5 can drive in unity-gain configuration?
The OPA4347EA/2K5 is specified to directly drive up to 250pF pure capacitive load in unity-gain buffer configuration while maintaining stability. For larger loads, a 10Ω–20Ω series resistor between output and load is recommended to suppress ringing without degrading DC accuracy - a technique validated in TI's SBOS167D datasheet Figure 6. This capability supports direct connection to ADC input capacitance and PCB parasitics in compact layouts.
Does the OPA4347EA/2K5 require external compensation for stability?
No, the OPA4347EA/2K5 is unity-gain stable and requires no external compensation components. Its internal compensation ensures phase margin >60° across full temperature and supply range when used in standard non-inverting, inverting, or buffer configurations. Stability is maintained with resistive loads ≥5kΩ and capacitive loads ≤250pF; for heavier capacitive loads, the datasheet recommends adding a small series output resistor (10Ω–20Ω) rather than modifying compensation.
What is the input common-mode voltage range specification for OPA4347EA/2K5?
The OPA4347EA/2K5 has an input common-mode voltage range of (V–) – 0.2V to (V+) + 0.2V, verified across –55°C to +125°C. This rail-to-rail input extends 200mV beyond both supply rails, enabled by its complementary N/P-channel input stage. Operation within the 400mV transition region ((V+) – 1.65V to (V+) – 0.95V) may degrade PSRR, CMRR, and offset - so designs should bias inputs outside this zone when ultimate precision is required.
Can the OPA4347EA/2K5 operate from a 2.3V supply?
Yes, the OPA4347EA/2K5 is fully specified and functional down to 2.3V single supply - confirmed in the Electrical Characteristics table (Minimum Operating Voltage). At 2.3V, it maintains rail-to-rail output swing (within 15mV of rails at 100kΩ), 350kHz GBW, and ≤34µA per-channel quiescent current. This makes it suitable for coin-cell (e.g., CR2032) and single-LiFePO₄ powered applications where headroom is minimal.
Is the OPA4347EA/2K5 pin-compatible with other quad op amps in TSSOP-14 packages?
The OPA4347EA/2K5 uses TI's standard TSSOP-14 pinout for quad op amps (Pin 1 = Out A, Pin 2 = –In A, Pin 3 = +In A, Pin 4 = V–, etc.), matching industry conventions. However, it is not a drop-in replacement for all TSSOP-14 quad op amps due to differences in input stage architecture (complementary rail-to-rail), quiescent current, and bandwidth. Always verify pin function alignment and electrical compatibility using the full datasheet before substitution.
OPA4347EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.17V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 20µA (x4 Channels)
- Current - Output / Channel:
- 17 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4347EA/2K5 FAQ
1.How can I place an order for OPA4347EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4347EA/2K5 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 OPA4347EA/2K5 reliable?
The price and inventory of OPA4347EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4347EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4347EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4347EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4347EA/2K5?
OPA4347EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4347EA/2K5 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 OPA4347EA/2K5?
For technical support, including OPA4347EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4347EA/2K5 requirements.
6.How does Aetrix verify that OPA4347EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4347EA/2K5 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 OPA4347EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4347EA/2K5?
All OPA4347EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4347EA/2K5, 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 OPA4347EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4347EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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