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Analog Devices Inc. LT6234CS8#PBF
- Part No.:
- LT6234CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6234CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,525
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Product details
Overview
LT6234CS8#PBF 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, 17V/µs slew rate, and operates from 3V to 12.6V supplies - enabling high-fidelity amplification in ultrasound front-ends and A/D driver stages.
For engineers reviewing the LT6234CS8#PBF datasheet, LT6234CS8#PBF pinout, LT6234CS8#PBF application, or LT6234CS8#PBF equivalent, key selection criteria include its dual-channel rail-to-rail output swing (within 50mV of rails), matched channel performance (≤800µV offset match), and guaranteed operation across 0°C to 70°C with SO-8 packaging.
Technical Context
The LT6234CS8#PBF implements a unity-gain stable voltage-feedback architecture with fully differential input stage and Class AB output stage, supporting rail-to-rail output swing while maintaining low distortion at frequencies up to 1MHz. Its enable pin allows independent shutdown of each amplifier, reducing supply current to ≤1.7µA per channel when disabled.
Designed for low-supply, high-dynamic-range applications, it features 115dB typical CMRR and PSRR, 30mA output drive capability, and optimized noise-efficiency (en·√ISUPPLY = 2.1) - making it suitable for driving SAR ADC inputs and active filter stages where SNR preservation is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 10kHz - enables high-SNR amplification of µV-level sensor signals without dominating system noise floor |
| Gain-Bandwidth Product | 60MHz - supports stable unity-gain and moderate-gain configurations (e.g., AV = 2–10) up to ~30MHz closed-loop bandwidth |
| Slew Rate | 17V/µs - ensures faithful reproduction of fast 10-bit+ ADC input transients without slewing-induced distortion |
| Supply Range | 3V to 12.6V single or ±1.5V to ±5V dual - compatible with 3.3V and 5V logic domains and legacy ±5V systems |
| Output Swing | Within 50mV of either rail at light load - maximizes dynamic range in low-voltage data acquisition systems |
| Input Offset Voltage Match | ≤800µV (channel-to-channel) - minimizes common-mode error in dual-path instrumentation and differential receiver designs |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded systems including medical diagnostics and test equipment |
Pinout & Package
LT6234CS8#PBF is housed in an 8-lead plastic SO (Small Outline) package (S8), 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012 compliant, with exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail buffered signal; capable of sourcing/sinking ≥30mA into resistive loads |
| 2 (–IN A) | Inverting input A | Differential input node with 22MΩ common-mode resistance; sensitive to PCB layout parasitics above 10MHz |
| 3 (+IN A) | Non-inverting input A | High-impedance input (22MΩ) referenced to system ground or common-mode bias network |
| 4 (V–) | Negative supply rail | Connects to ground (single-supply) or negative rail (dual-supply); undersides may be tied to V– for thermal relief |
| 5 (V+) | Positive supply rail | Accepts 3V–12.6V; decoupling capacitor (≥0.1µF ceramic) required within 5mm of this pin |
| 6 (+IN B) | Non-inverting input B | Independent high-Z input for second channel; matches +IN A in offset, bias, and capacitance (≤4.2pF) |
| 7 (–IN B) | Inverting input B | Matches –IN A in DC and AC characteristics; enables matched dual-channel filtering or differential gain stages |
| 8 (OUT B) | Amplifier B output | Functionally identical to OUT A; supports independent gain/feedback networks per channel |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range in 3.3V systems - e.g., 0–3.3V output with <50mV headroom at both rails |
| Low 1.9nV/√Hz noise density | Preserves signal integrity in front-end amplification of piezoelectric sensors or photodiode TIA outputs |
| 60MHz GBW with unity-gain stability | Supports wideband active filters (e.g., 2nd-order Butterworth up to 10MHz) without external compensation |
| Matched dual-channel topology | Reduces mismatch-induced errors in differential receivers, programmable gain amps, and dual-path signal chains |
| Enable control per amplifier | Allows dynamic power gating - e.g., disabling unused channel in battery-powered portable ultrasound units |
| 115dB CMRR (typ) | Rejects interference in noisy industrial environments when used in single-ended-to-differential conversion |
Applications
| Ultrasound Signal Conditioning | Low-Noise A/D Driver |
|---|---|
|
Use Scenario: Amplifying weak, high-frequency echoes (1–15MHz) from piezoelectric transducers before digitization. IC Role / Device Role / Timing Role: Dual-channel low-noise preamplifier with matched gain paths for beamforming channels. Use Value: 1.9nV/√Hz noise floor preserves SNR of microvolt-level echo signals; rail-to-rail output drives 12-bit+ SAR ADCs directly. |
Use Scenario: Buffering and level-shifting analog sensor outputs to match ADC input voltage ranges. IC Role / Device Role / Timing Role: Precision unity-gain buffer with fast settling (<175ns to 0.1%) and minimal THD. Use Value: 17V/µs slew rate prevents distortion on fast step inputs; 60MHz GBW ensures flat frequency response through Nyquist band. |
| Active Anti-Aliasing Filter | Rail-to-Rail Instrumentation Front-End |
|
Use Scenario: Implementing 2nd- or 4th-order low-pass filters prior to sampling to suppress out-of-band noise. IC Role / Device Role / Timing Role: Dual op-amp configured as MFB or Sallen-Key topology with precise component matching. Use Value: Channel matching (≤800µV VOS diff) maintains filter symmetry; 115dB CMRR rejects common-mode clock coupling. |
Use Scenario: Building 3-op-amp instrumentation amplifier topologies for bridge sensor readout. IC Role / Device Role / Timing Role: Dual amplifier serving as matched gain-stage pair in classic IA configuration. Use Value: Tight input offset match improves common-mode rejection beyond basic CMRR spec; rail-to-rail output accommodates wide bridge excitation ranges. |
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 |
|---|---|---|---|
| OPA211AIDR | Lower noise (1.1nV/√Hz), higher quiescent current (3.6mA/ch), no enable pin, SO-8 package | Better SNR-critical applications (e.g., precision weigh scales); less suitable for power-constrained portable devices | Choose OPA211AIDR when ultra-low noise dominates over power and enable functionality |
| AD8605ARZ-REEL7 | Higher noise (12nV/√Hz), lower GBW (10MHz), zero-drift architecture, SO-8 package | DC-precision applications requiring <1µV drift (e.g., thermocouple amps); unsuitable for >100kHz signal chains | Choose AD8605ARZ-REEL7 only for low-frequency, high-DC-accuracy use cases - not for broadband signal paths |
Compared with OPA211AIDR and AD8605ARZ-REEL7, LT6234CS8#PBF uniquely balances low noise (1.9nV/√Hz), high speed (60MHz GBW), rail-to-rail output, and enable control - making it optimal for portable, wideband, battery-sensitive instrumentation where all four attributes are simultaneously required.
Availability
LT6234CS8#PBF is available at Aetrix Electronics and suitable for ultrasound imaging modules, portable data loggers, and industrial sensor signal conditioners requiring stable component supply across production lifecycles.
Supply support for LT6234CS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT6234 belongs to Linear Technology's precision, low-noise op amp family designed specifically for high-fidelity signal acquisition in medical, test & measurement, and industrial sensing systems.
FAQ
What is the maximum supply voltage rating for LT6234CS8#PBF?
The absolute maximum total supply voltage (V+ to V–) for LT6234CS8#PBF is 12.6V. Operation beyond this risks permanent damage. For reliable long-term use, Analog Devices specifies a recommended operating range of 3V to 12.6V, with full performance guaranteed across 0°C to 70°C at 3.3V, 5V, or ±5V supplies. The LT6234CS8#PBF must never be subjected to reverse polarity or transient overvoltage exceeding these limits.
Does LT6234CS8#PBF support rail-to-rail input common-mode range?
No - LT6234CS8#PBF features rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range is specified as 1.5V to 4V (at 5V supply) or 1.15V to 2.65V (at 3.3V supply), guaranteed by CMRR. Inputs must remain within these bounds to maintain specified offset, gain, and rejection performance. Exceeding them degrades CMRR and may cause phase reversal in extreme cases.
Can LT6234CS8#PBF drive capacitive loads directly?
LT6234CS8#PBF can drive moderate capacitive loads (≤100pF) stably with proper PCB layout and series output resistance (≥10Ω). For larger loads (e.g., ADC input capacitance >100pF), external isolation resistor (RS = 20–50Ω) is required to prevent peaking or oscillation, as confirmed by G26/G27 in the datasheet. Driving >500pF directly is not recommended without additional compensation.
Is LT6234CS8#PBF pin-compatible with other members of the LT623x family?
Yes - LT6234CS8#PBF shares identical SO-8 pinout with LT6234IS8#PBF (industrial temp grade) and LT6234CDD#PBF (DFN variant uses different pin mapping). However, it is *not* pin-compatible with LT6233 (SOT-23-6) or LT6235 (SSOP-16). Pin-for-pin replacement is valid only among LT6234 variants in SO-8 packages, preserving existing PCB layouts during grade or sourcing changes.
What is the typical enable pin behavior for LT6234CS8#PBF?
The ENABLE pin (not present on SO-8 package - enabled by default) applies only to TSOT-23 and DFN variants (e.g., LT6234CDD#PBF). LT6234CS8#PBF has no ENABLE pin; both amplifiers are always active. This is confirmed by pin configuration diagrams: SO-8 package lacks ENABLE terminal, and electrical specs for LT6234CS8#PBF omit ENABLE-related parameters (tON/tOFF, IS_disabled). The LT6234CS8#PBF operates continuously unless powered down externally.
LT6234CS8#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:
- 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#PBF FAQ
1.How can I place an order for LT6234CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6234CS8#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 LT6234CS8#PBF reliable?
The price and inventory of LT6234CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6234CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6234CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6234CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6234CS8#PBF?
LT6234CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6234CS8#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 LT6234CS8#PBF?
For technical support, including LT6234CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6234CS8#PBF requirements.
6.How does Aetrix verify that LT6234CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6234CS8#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 LT6234CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT6234CS8#PBF?
All LT6234CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6234CS8#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 LT6234CS8#PBF part is unused and in its original packaging.
Return procedure for LT6234CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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