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Analog Devices Inc. LT6234CS8#TRPBF
- Part No.:
- LT6234CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6234CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:12,543
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Product details
Overview
LT6234CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise operational amplifier optimized for precision signal conditioning in low-voltage systems. It delivers 1.9nV/√Hz input voltage noise, 60MHz gain-bandwidth product at unity gain, 17V/µs slew rate, and draws only 1.2mA per amplifier from a 3V–12.6V supply - enabling high-fidelity amplification in ultrasound front-ends and ADC driver stages.
For engineers reviewing the LT6234CS8#TRPBF datasheet, LT6234CS8#TRPBF pinout, LT6234CS8#TRPBF application, or LT6234CS8#TRPBF equivalent, key selection criteria include its dual-channel SO-8 package, guaranteed rail-to-rail output swing within 50mV of rails, channel-to-channel matching (≤800µV VOS match), and enable-pin support for power-gated operation in battery-sensitive designs.
Technical Context
The LT6234CS8#TRPBF implements a fully differential, unity-gain stable voltage-feedback architecture with optimized internal compensation for stable operation driving capacitive loads up to 100pF. Its input stage uses a proprietary low-noise bipolar topology achieving 0.43pA/√Hz balanced input current noise while maintaining 22MΩ common-mode input resistance.
Each amplifier features independent enable control (pin 5), allowing selective shutdown of one channel without affecting the other. The device operates across ±1.5V to ±5V dual supplies or 3V–12.6V single supply, with CMRR and PSRR exceeding 90dB over 1.5V–4V common-mode range - critical for rejecting supply and sensor-coupled interference in instrumentation-grade circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz @ 10kHz - enables sub-µV signal resolution in 100kHz bandwidth applications |
| Gain-Bandwidth Product | 60MHz @ AV ≥ 1 - supports closed-loop gains up to 10 with >6MHz usable bandwidth |
| Slew Rate | 17V/µs - ensures <175ns settling to 0.1% for 2V step, critical for fast ADC sampling |
| Output Swing | Within 50mV of rails @ ILOAD = 15mA - maximizes dynamic range in 3.3V systems |
| Supply Current | 1.2mA per amplifier max - allows dual-channel operation under 2.5mA total at 5V |
| Input Offset Voltage | 450µV max (C-grade) - supports DC-coupled sensor interfaces with <0.1% gain error |
| Common-Mode Rejection | 115dB typ - rejects ground bounce and supply ripple in mixed-signal PCB layouts |
Pinout & Package
LT6234CS8#TRPBF is housed in an 8-lead plastic SO (S8) package with standard op-amp pinout and JEDEC MS-012AC footprint (4.9mm × 3.9mm × 1.45mm). Thermal resistance θJA = 190°C/W enables operation at full spec up to +85°C ambient without heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Capable of sourcing/sinking ±30mA; rail-to-rail swing supports 3.3V ADC reference buffering |
| 2 (–IN A) | Inverting input A | High-impedance node (22MΩ); matched to +IN A for <800µV offset mismatch |
| 3 (+IN A) | Non-inverting input A | Accepts common-mode voltages from –3V to +4V on ±5V supplies |
| 4 (V–) | Negative supply rail | Internally connected to exposed pad (SO-8); recommended PCB thermal via to ground plane |
| 5 (ENABLE) | Channel enable control | Active-low logic: <0.3V disables amp (IQ ≤ 1.7µA); >V+–0.2V enables full operation |
| 6 (+IN B) | Non-inverting input B | Independent of Channel A; supports dual-path signal processing with matched specs |
| 7 (–IN B) | Inverting input B | Matched to +IN B for consistent DC performance across both channels |
| 8 (OUT B) | Amplifier B output | Functionally identical to OUT A; enables dual-ended or differential output configurations |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output stage | Delivers full 3.3V or 5V dynamic range without headroom loss - essential for low-voltage data acquisition |
| Low-noise bipolar input | 1.9nV/√Hz + 0.43pA/√Hz enables high-Z sensor interfacing (e.g., piezoelectric ultrasound transducers) without added Johnson noise |
| Enable-controlled power gating | Reduces quiescent current to ≤1.7µA per channel - extends battery life in portable medical devices |
| Matched dual-channel architecture | ≤800µV input offset voltage match ensures precise differential gain and common-mode rejection in instrumentation topologies |
| Unity-gain stable design | Drives 100pF capacitive loads directly - eliminates need for external isolation resistors in ADC buffer applications |
Applications
| Ultrasound Signal Conditioning | Low-Power Data Acquisition |
|---|---|
Use Scenario: Amplifying weak echo signals from 2.5–10MHz piezoelectric transducers in handheld ultrasound probes. IC Role / Device Role / Timing Role: First-stage low-noise preamplifier with 60MHz bandwidth and 1.9nV/√Hz noise floor to preserve SNR before digitization. Use Value: Enables detection of sub-millimeter tissue structures by maintaining >70dB SNR across diagnostic bandwidth without cooling. | Use Scenario: Buffering and level-shifting analog sensor outputs (e.g., thermocouples, strain gauges) into 16-bit SAR ADCs. IC Role / Device Role / Timing Role: Rail-to-rail output driver ensuring full-scale utilization of ADC reference voltage under 3.3V supply constraints. Use Value: Eliminates external level-shifters and reduces BOM count while maintaining <0.01% gain nonlinearity over temperature. |
| Active Filter Stages | Rail-to-Rail Sensor Interfaces |
Use Scenario: Implementing 4th-order anti-aliasing filters in portable ECG monitors with strict power budgets. IC Role / Device Role / Timing Role: Dual-channel op-amp providing two cascaded 2-pole Sallen-Key stages with matched component sensitivity. Use Value: Achieves >80dB stopband attenuation at 1kHz while consuming <2.5mA total - doubling battery runtime vs. discrete alternatives. | Use Scenario: Direct interfacing of pH electrodes and ion-selective sensors requiring zero-input-bias-current and rail-referenced output. IC Role / Device Role / Timing Role: Precision unity-gain buffer with 22MΩ input impedance and <500µV offset to prevent electrode polarization drift. Use Value: Maintains measurement stability over 24-hour clinical monitoring without recalibration due to low VOS TC (0.5µV/°C). |
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 |
|---|---|---|---|
| ADA4898-2ARMZ | Higher noise (2.9nV/√Hz), higher supply current (3.5mA/amp), no enable pin | Better slew rate (270V/µs) but unsuitable for battery-powered shutdown modes | Select when ultra-high speed (>100MHz GBW) outweighs power and noise requirements |
| OPA2188AIDR | Zero-drift architecture, lower offset (25µV), higher noise (8.8nV/√Hz), 1MHz GBW | Superior DC accuracy but insufficient bandwidth for ultrasound or active filter use cases | Select for precision DC-coupled sensor signal chains where AC performance is secondary |
Compared with ADA4898-2ARMZ and OPA2188AIDR, the LT6234CS8#TRPBF uniquely balances 60MHz bandwidth, 1.9nV/√Hz noise, and enable-controlled low-power operation - making it optimal for portable, wideband, battery-constrained instrumentation where both AC fidelity and energy efficiency are mandatory.
Availability
LT6234CS8#TRPBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable data loggers, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for LT6234CS8#TRPBF 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 LT6234CS8#TRPBF 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- and energy-constrained instrumentation systems.
FAQ
What is the maximum operating supply voltage for the LT6234CS8#TRPBF?
The LT6234CS8#TRPBF supports a total supply voltage range of 3V to 12.6V. When operated on dual supplies, this corresponds to ±1.5V to ±5V. Absolute maximum rating is 12.6V between V+ and V– pins; exceeding this may cause permanent damage. Operation at 12V single supply is validated per datasheet electrical characteristics tables.
Does the LT6234CS8#TRPBF support rail-to-rail input common-mode range?
No, the LT6234CS8#TRPBF does not support rail-to-rail input. Its guaranteed common-mode input range is –3V to +4V on ±5V supplies and 1.15V to 2.65V on 3.3V single supply. Input voltage beyond these limits degrades CMRR and may increase offset error, though the device remains functional per absolute maximum ratings.
How does the ENABLE pin function on the LT6234CS8#TRPBF?
The ENABLE pin (Pin 5) is active-low and controls both amplifiers simultaneously. Driving it below 0.3V disables both channels, reducing total supply current to ≤1.7µA. Pulling it above V+–0.2V enables full operation. The pin draws ≤110µA sink current when low and exhibits <1µA leakage when high, enabling direct microcontroller GPIO control without level-shifting.
What is the typical channel-to-channel input offset voltage match for the LT6234CS8#TRPBF?
The LT6234CS8#TRPBF specifies a maximum input offset voltage match of 800µV between its two amplifiers under C-grade (0°C to 70°C) conditions. This matching ensures predictable differential gain and minimized common-mode error in dual-path circuits such as instrumentation amplifiers or active filters where channel symmetry is critical.
Can the LT6234CS8#TRPBF drive a 1000pF capacitive load stably?
No - the LT6234CS8#TRPBF is characterized for stable operation with capacitive loads up to 100pF. Driving larger loads (e.g., 1000pF) without isolation resistance causes peaking and potential oscillation due to phase margin degradation. For heavy capacitive loads, use a series resistor (≥20Ω) between output and load, or select a unity-gain stable op-amp rated for >1nF loads.
LT6234CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 100 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT6234CS8#TRPBF FAQ
1.How can I place an order for LT6234CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6234CS8#TRPBF 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 LT6234CS8#TRPBF reliable?
The price and inventory of LT6234CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6234CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT6234CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6234CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6234CS8#TRPBF?
LT6234CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6234CS8#TRPBF 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 LT6234CS8#TRPBF?
For technical support, including LT6234CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6234CS8#TRPBF requirements.
6.How does Aetrix verify that LT6234CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT6234CS8#TRPBF 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 LT6234CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT6234CS8#TRPBF?
All LT6234CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6234CS8#TRPBF, 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 LT6234CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT6234CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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