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Analog Devices Inc. LT6234IS8#PBF
- Part No.:
- LT6234IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6234IS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:7,673
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Product details
Overview
LT6234IS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise operational amplifier in an 8-pin SO package, delivering 1.9nV/√Hz input voltage noise, 60MHz gain-bandwidth product, and 1.2mA per amplifier supply current. It operates from 3V to 12.6V supplies and drives 30mA loads, making it suitable for precision signal conditioning in ultrasound front-ends and A/D converter buffering.
For engineers reviewing the LT6234IS8#PBF datasheet, LT6234IS8#PBF pinout, LT6234IS8#PBF application, or LT6234IS8#PBF equivalent, key selection criteria include its guaranteed –40°C to 85°C industrial temperature range, dual-channel matching performance (≤1000µV VOS match), rail-to-rail output swing within 50mV of rails, and enable pin support for power-gated operation.
Technical Context
The LT6234IS8#PBF implements a unity-gain stable voltage-feedback architecture optimized for low-voltage, low-noise signal chains. Its internal compensation delivers consistent 60MHz GBW across supply voltages from 3V to 12.6V and maintains ≥45° phase margin into 1kΩ//5pF loads.
Each amplifier features independent enable control, allowing dynamic power management with 1.5µA disabled current. Input stage uses bipolar junction transistors for low 1.9nV/√Hz voltage noise and balanced 0.43pA/√Hz current noise at 10kHz with 10kΩ source impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 10kHz - enables high-resolution sensor signal amplification without degrading SNR |
| Gain-Bandwidth Product | 60MHz - supports closed-loop bandwidths up to ~30MHz in unity-gain buffer configurations |
| Supply Current per Amp | 1.2mA max - allows dual-channel operation under 2.5mA total, critical for battery-powered instrumentation |
| Output Swing | Within 50mV of rails at 15mA - maximizes dynamic range in 3.3V systems with ±1.65V effective headroom |
| Input Offset Voltage Match | ≤1000µV (channel-to-channel) - ensures <0.1% gain error in differential or instrumentation amplifier topologies |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin applications without derating |
| Common Mode Rejection | 90dB min - rejects supply ripple and shared-impedance noise in multi-stage analog signal paths |
Pinout & Package
LT6234IS8#PBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout and JEDEC MS-012AC footprint. Thermal resistance θJA = 190°C/W enables operation at full rating without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives capacitive loads ≤100pF directly; requires series resistor for larger loads |
| 2 | –IN A | Inverting input A - high-impedance node (22MΩ common-mode); sensitive to PCB leakage and guard traces |
| 3 | +IN A | Non-inverting input A - matched to Pin 2 for CMRR optimization; tie unused inputs to reference |
| 4 | V– | Negative supply rail - connects to undershoot protection diodes; must be decoupled locally |
| 5 | V+ | Positive supply rail - accepts 3V–12.6V; 100nF + 10µF local decoupling required for stability |
| 6 | +IN B | Non-inverting input B - electrically isolated from Channel A; no internal connection to Pin 3 |
| 7 | –IN B | Inverting input B - matches Pin 2 offset and bias specs; use same layout practices as Channel A |
| 8 | OUT B | Amplifier B output - identical drive capability to Pin 1; share thermal path with Pin 1 in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 3.3Vpp output from 3.3V supply - eliminates level-shifting ICs in low-voltage data acquisition |
| Low 1.9nV/√Hz noise density | Enables sub-16-bit ENOB preservation in 100ksps ADC drivers without external filtering |
| Enable pin per amplifier | Reduces quiescent current to ≤1.5µA per channel - extends battery life in duty-cycled sensor nodes |
| 60MHz GBW at 3V supply | Maintains bandwidth down to minimum supply - avoids performance collapse in brown-out conditions |
| 115dB typical CMRR | Rejects >100,000:1 common-mode interference - critical for medical ECG and industrial current sensing |
Applications
| Ultrasound Signal Conditioning | A/D Converter Driver |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in portable ultrasound systems with 3.3V supply rails. IC Role / Device Role / Timing Role: Dual-channel low-noise preamplifier with matched gain stages for beamforming and time-of-flight processing. Use Value: 1.9nV/√Hz noise floor preserves signal integrity through 12-bit ADC sampling at 40MHz, enabling 1mm spatial resolution. | Use Scenario: Driving SAR and sigma-delta ADC inputs in precision data loggers requiring DC accuracy and AC fidelity. IC Role / Device Role / Timing Role: Rail-to-rail output buffer isolating ADC input capacitance while maintaining THD < –90dB up to 100kHz. Use Value: 30mA output drive settles 2V step in 175ns (0.1%), eliminating acquisition dead time in multi-channel systems. |
| Rail-to-Rail Sensor Interface | Active Filter Stage |
Use Scenario: Interfacing bridge-based pressure sensors with 0–100mV full-scale output in industrial process controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset correction. Use Value: ≤700µV max input offset and 0.5µV/°C drift ensure <0.1% FS error over –40°C to 85°C without calibration. | Use Scenario: Implementing 4th-order anti-aliasing filters in audio and vibration monitoring systems with 24-bit ADCs. IC Role / Device Role / Timing Role: Dual op amp configured as cascaded Sallen-Key stages with matched component sensitivity. Use Value: 60MHz GBW supports filter cutoffs up to 5MHz with <0.01dB passband ripple and monotonic group delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT6234CS8#PBF | Same silicon, 0°C to 70°C temp grade - lacks extended industrial qualification | Suitable only for commercial environments; not rated for cold-start or high-ambient industrial use | Select LT6234IS8#PBF when operating outside 0°C–70°C or requiring production traceability to –40°C spec limits |
| ADA4898-2ARMZ | Higher 1.05nV/√Hz noise, 290MHz GBW, ±15V max supply - no enable pin | Better for wideband RF IF stages but consumes 12mA per amp and lacks power gating | Choose ADA4898-2ARMZ only when bandwidth >100MHz is mandatory and system power budget permits 24mA total |
Compared with LT6234CS8#PBF, the LT6234IS8#PBF provides guaranteed performance over –40°C to 85°C with identical noise and bandwidth, while ADA4898-2ARMZ trades 4× higher supply current for 4.8× greater bandwidth - making LT6234IS8#PBF optimal for battery-constrained, precision low-frequency signal chains.
Availability
LT6234IS8#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, industrial sensor interfaces, and precision data acquisition equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT6234IS8#PBF 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
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT6234 belongs to ADI's legacy Linear Technology precision op amp portfolio, engineered specifically for low-noise, low-power, rail-to-rail signal conditioning in space-constrained, thermally demanding applications.
FAQ
What is the maximum supply voltage for LT6234IS8#PBF?
The absolute maximum total supply voltage (V+ to V–) for LT6234IS8#PBF is 12.6V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent device damage. For reliable long-term operation, Analog Devices recommends staying within the 3V to 12.6V specified operating range, with proper decoupling and thermal management in high-voltage applications.
Does LT6234IS8#PBF include an enable pin for power management?
No, LT6234IS8#PBF does not include an enable pin. The enable functionality is present only on the single-amplifier LT6233/LT6233-10 variants (e.g., LT6233IS6#PBF). The dual LT6234IS8#PBF has no dedicated enable terminal; both amplifiers operate continuously when powered. Power gating must be implemented externally via supply switching.
What is the typical input offset voltage for LT6234IS8#PBF at room temperature?
The typical input offset voltage for LT6234IS8#PBF is 550µV at TA = 25°C, based on the Electrical Characteristics table for the I-grade (–40°C to 85°C) devices. The maximum guaranteed value across the full temperature range is 700µV, ensuring predictable DC error in precision gain stages without trimming.
Can LT6234IS8#PBF drive a 100Ω load rail-to-rail?
LT6234IS8#PBF can drive a 100Ω load, but output swing is reduced: at VS = 5V, VOH is typically 4.8V and VOL is 0.12V (i.e., within 120mV of rails), not full rail-to-rail. For true rail-to-rail swing under 100Ω, reduce load to ≥600Ω or use external boost circuitry - the 30mA short-circuit rating confirms safe operation, but voltage compliance degrades linearly with load current.
Is LT6234IS8#PBF pin-compatible with other packages of the same part number?
Yes, LT6234IS8#PBF shares identical pinout and electrical behavior with LT6234IDD#PBF (8-lead DFN), as confirmed by the Pin Configuration diagrams and Order Information table. Both packages use standard dual op amp pin assignments (OUT A, –IN A, +IN A, V–, V+, +IN B, –IN B, OUT B), enabling direct PCB footprint substitution where thermal and layout constraints permit.
LT6234IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 60 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.5 µA
- Voltage - Input Offset:
- 75 µV
- Current - Supply:
- 1.05mA (x2 Channels)
- Current - Output / Channel:
- 55 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT6234IS8#PBF FAQ
1.How can I place an order for LT6234IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6234IS8#PBF 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 LT6234IS8#PBF reliable?
The price and inventory of LT6234IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6234IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6234IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6234IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6234IS8#PBF?
LT6234IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6234IS8#PBF 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 LT6234IS8#PBF?
For technical support, including LT6234IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6234IS8#PBF requirements.
6.How does Aetrix verify that LT6234IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6234IS8#PBF 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 LT6234IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT6234IS8#PBF?
All LT6234IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6234IS8#PBF, 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 LT6234IS8#PBF part is unused and in its original packaging.
Return procedure for LT6234IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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