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Texas Instruments OPA2347YZDT
- Part No.:
- OPA2347YZDT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
OPA2347YZDT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
OPA2347YZDT from Texas Instruments is a dual, microPower, rail-to-rail input/output operational amplifier in an 8-pin WCSP (DSBGA) package. It delivers 350kHz gain-bandwidth, 20µA per channel quiescent current, and operates from 2.3V to 5.5V single supply - enabling precision signal conditioning in space-constrained, battery-powered smoke and CO detectors.
For engineers reviewing the OPA2347YZDT datasheet, OPA2347YZDT pinout, OPA2347YZDT application, or OPA2347YZDT equivalent, key selection criteria include its ultra-low IQ, rail-to-rail swing within 5mV of rails (RL = 100kΩ), ±0.5pA typical input bias current, –55°C to +125°C operating range, and WCSP-8 thermal resistance of 250°C/W.
Technical Context
The OPA2347YZDT employs a complementary differential input stage-N-channel and P-channel pairs-to achieve rail-to-rail input operation extending 200mV beyond both supply rails. Its class AB output stage enables rail-to-rail output swing, delivering 5mV from rails into 100kΩ loads and maintaining >100dB open-loop gain at 5.5V.
It is unity-gain stable and optimized for driving ADC inputs (e.g., ADS7822), with 0.17V/µs slew rate and 21µs 0.1% settling time (5V step). Input voltage noise is 60nV/√Hz at 1kHz; input current noise is 0.7fA/√Hz - supporting high-impedance sensor interfaces without significant noise degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 5.5V single supply - supports direct integration into 3V and 5V battery-powered systems without level-shifting. |
| Quiescent Current (per channel) | 20µA typical - enables multi-year operation on coin-cell batteries in portable safety sensors. |
| Gain-Bandwidth Product | 350kHz - sufficient for anti-aliasing filtering and buffering of 12-bit ADCs sampling up to ~50ksps. |
| Input Offset Voltage | 2mV (min) to 6mV (typ) - ensures <0.1% error in 5V full-scale sensor signal chains without trimming. |
| Output Voltage Swing | Within 5mV of rails (RL = 100kΩ) - maximizes dynamic range in low-voltage systems like 2.7V smoke detector front-ends. |
| Input Bias Current | ±0.5pA typical - preserves signal integrity when interfacing high-impedance electret microphones or gas sensor bridges. |
| Operating Temperature Range | –55°C to +125°C - qualified for under-hood automotive cabin air quality monitors and industrial fire alarm control panels. |
Pinout & Package
OPA2347YZDT uses an 8-ball DSBGA (WCSP-8) package measuring 1.008mm × 2.100mm, with bump-side-down mounting and lead-free SnAgCu terminations. It complies with MSL Level-1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Top-left, bump side down) | V+ | Positive supply rail - must be bypassed with 0.01µF ceramic capacitor near the ball for stability. |
| 2 | Out B | Inverting amplifier output B - capable of sourcing/sinking ±17mA; swing limited by load impedance. |
| 3 | –In B | Inverting input B - high-impedance node; sensitive to PCB leakage and light exposure in WCSP variant. |
| 4 | +In B | Non-inverting input B - common-mode range extends (V–) – 0.2V to (V+) + 0.2V. |
| 5 | Out A | Inverting amplifier output A - electrically isolated from Out B; shares V+ and V– rails. |
| 6 | –In A | Inverting input A - used with external feedback network to set closed-loop gain. |
| 7 | +In A | Non-inverting input A - bias current increases under ambient light; shielding recommended. |
| 8 (Top-right) | V– | Negative supply rail (typically GND) - return path for both amplifiers; low-impedance ground plane required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.3V–5.5V supply range - critical for maximizing SNR in low-voltage analog front-ends. |
| 20µA per channel quiescent current | Reduces total system power by >50% vs. standard CMOS op amps - extends battery life in portable safety equipment. |
| 350kHz bandwidth with 0.17V/µs slew rate | Supports stable unity-gain buffering of 12-bit ADC inputs while rejecting aliasing above Nyquist frequency. |
| ±0.5pA input bias current (typ) | Minimizes voltage error across high-value sensor resistors (e.g., 1MΩ gas sensor bridges) without calibration. |
| Specified from –55°C to +125°C | Validates performance across automotive, industrial, and harsh-environment applications without derating. |
Applications
| Smoke Detectors | CO Detectors |
|---|---|
|
Use Scenario: Amplifying weak ionization chamber or photoelectric sensor signals in residential/commercial smoke alarms. IC Role / Device Role / Timing Role: Dual-channel transimpedance and buffer amplifier - one channel conditions sensor current, the other drives comparator/ADC. Use Value: 20µA IQ enables >5-year battery life on CR123A; rail-to-rail swing preserves full 0–5V ADC input range at 3V supply. |
Use Scenario: Signal conditioning for electrochemical CO sensor outputs in portable personal safety monitors. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end - rejects common-mode interference from heater elements. Use Value: 2mV max offset and 3µV/°C drift minimize temperature-induced false alarms; –55°C to +125°C rating covers outdoor deployment. |
| 2-Wire Transmitters | Portable Medical Sensors |
|
Use Scenario: Loop-powered 4–20mA transmitter for pressure or temperature sensing in building automation. IC Role / Device Role / Timing Role: Precision voltage-to-current converter core - converts sensor voltage to regulated loop current. Use Value: 350kHz GBW ensures stability with capacitive loop wiring; 2.3V min supply allows operation during brownout conditions. |
Use Scenario: Front-end amplification for wearable pulse oximetry or ECG electrodes with ultra-low power budget. IC Role / Device Role / Timing Role: Dual-channel biopotential amplifier - one channel for AC-coupled signal, one for DC reference/lead-off detection. Use Value: 0.7fA/√Hz current noise prevents electrode interface degradation; WCSP-8 footprint saves PCB area in compact wearables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2347EA | SOT23-8 package (3.0mm × 2.8mm); higher θJA (150°C/W); same electrical specs. | Better suited for hand-soldering or prototyping; less space-constrained layouts. | Select OPA2347EA when board assembly lacks fine-pitch WCSP capability or thermal management favors larger package. |
| TLV2462IDR | Higher IQ (225µA/channel); wider supply range (2.7–6V); lower GBW (6.4MHz); different pinout. | Preferred where speed matters more than power; not suitable for sub-100µA battery systems. | Choose TLV2462IDR only if design requires >1MHz bandwidth and can tolerate 10× higher quiescent current. |
Compared with OPA2347YZDT, OPA2347EA offers identical performance in a more manufacturable SOT23-8 package but sacrifices 40% board area efficiency, while TLV2462IDR trades ultra-low power for speed - making OPA2347YZDT uniquely optimal for miniaturized, long-life safety sensor nodes.
Availability
OPA2347YZDT is available at Aetrix Electronics and suitable for smoke detectors, CO detectors, and 2-wire transmitters requiring stable component supply with guaranteed long-term availability and RoHS-compliant lead-free finish.
Supply support for OPA2347YZDT 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 over 90 years of innovation in precision amplifiers and low-power signal chain solutions.
The OPA2347YZDT belongs to TI's OPA347 family of microPower rail-to-rail op amps, designed specifically for battery-operated safety and environmental monitoring systems demanding minimal IQ, wide temperature operation, and miniature packaging.
FAQ
What is the maximum operating temperature for the OPA2347YZDT?
The OPA2347YZDT is fully specified and tested from –55°C to +125°C, with absolute maximum ratings extending to +150°C junction temperature. This makes OPA2347YZDT suitable for under-hood automotive cabin air quality modules and industrial fire alarm control units exposed to elevated ambient temperatures.
Does the OPA2347YZDT require input protection against overvoltage?
Yes - the OPA2347YZDT input terminals are diode-clamped to the supply rails, with absolute maximum input voltage of (V–) – 0.5V to (V+) + 0.5V. Exceeding this range risks damage unless input current is limited to ≤10mA using series resistors, as documented in the OPA2347YZDT datasheet Figure 5.
Can the OPA2347YZDT drive capacitive loads directly?
The OPA2347YZDT can directly drive up to 250pF in unity-gain configuration. For larger capacitive loads (e.g., ADC input capacitance + PCB parasitics), a 10Ω–20Ω series resistor at the output improves stability without degrading DC accuracy - a technique validated in the OPA2347YZDT application notes.
Is the OPA2347YZDT sensitive to ambient light?
Yes - the WCSP-8 package exposes the silicon die; ambient light increases input bias current (up to 100pA in lab tests) and may elevate offset voltage. The OPA2347YZDT datasheet recommends full optical shielding in final product enclosures, especially under fluorescent lighting which introduces hum.
What is the typical input offset voltage drift of the OPA2347YZDT?
The OPA2347YZDT exhibits a typical input offset voltage drift of 3µV/°C, with production distribution showing >95% of units within 1–7µV/°C. This low drift ensures stable baseline performance across temperature gradients in battery-powered smoke detectors deployed indoors and outdoors.
OPA2347YZDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-DSBGA (1.9x0.9)
OPA2347YZDT FAQ
1.How can I place an order for OPA2347YZDT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2347YZDT 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 OPA2347YZDT reliable?
The price and inventory of OPA2347YZDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2347YZDT is usually 5 days.
3.What payment methods are accepted for OPA2347YZDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2347YZDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2347YZDT?
OPA2347YZDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2347YZDT 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 OPA2347YZDT?
For technical support, including OPA2347YZDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2347YZDT requirements.
6.How does Aetrix verify that OPA2347YZDT is sourced from the original manufacturer or authorized distributors?
All OPA2347YZDT 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 OPA2347YZDT meets industry standards.
7.What is the process for return or replacement of OPA2347YZDT?
All OPA2347YZDT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2347YZDT, 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 OPA2347YZDT part is unused and in its original packaging.
Return procedure for OPA2347YZDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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