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Analog Devices Inc. LT6234CDD#PBF
- Part No.:
- LT6234CDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6234CDD#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,848
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Product details
Overview
LT6234CDD#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail output, low-noise, unity-gain stable operational amplifier in an 8-lead (3mm × 3mm) plastic DFN package. It delivers 1.9nV/√Hz input voltage noise, 60MHz gain-bandwidth product at AV ≥ 1, 17V/µs slew rate, and operates from 3V to 12.6V supplies - optimized for low-voltage signal conditioning in ultrasound amplifiers and A/D driver stages.
For engineers reviewing the LT6234CDD#PBF datasheet, LT6234CDD#PBF pinout, LT6234CDD#PBF application, or LT6234CDD#PBF equivalent, key selection criteria include its 0°C to 70°C specified temperature range, dual-channel matching performance (≤800µV VOS match), enable-pin control for power gating, and DFN package thermal resistance (θJA = 160°C/W) for compact, thermally constrained layouts.
Technical Context
The LT6234CDD#PBF implements a complementary bipolar input stage enabling ultra-low voltage noise (1.9nV/√Hz) while maintaining low input bias current (≤3.5µA) and high CMRR (≥90dB). Its unity-gain stability and rail-to-rail output swing (within 50mV of rails at 5V supply) support precision buffering and active filtering without external compensation.
Each amplifier features independent enable control (VL = 0.3V, VH = V+ – 0.25V), allowing dynamic power management with turn-on time ≤900ns and disabled supply current ≤1.7µA. The device is characterized for single-supply (3.3V, 5V) and split-supply (±2.5V, ±5V) operation, with full specifications guaranteed over 0°C to 70°C.
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 at AV ≥ 1 - supports stable closed-loop gain up to 60MHz for wideband active filters and ADC drivers |
| Slew Rate | 17V/µs - ensures faithful reproduction of fast transient signals (e.g., pulse-shaped ultrasound echoes) |
| Supply Range | 3V to 12.6V - compatible with battery-powered portable instruments and industrial 5V/12V systems |
| Output Swing | Within 50mV of rails at 5V - maximizes dynamic range in low-voltage data acquisition front-ends |
| Input Offset Match | ≤800µV (channel-to-channel) - critical for differential signal processing and instrumentation amplifier configurations |
| Enable Pin Threshold | VH = V+ – 0.25V - allows direct interfacing with 3.3V logic for power sequencing in multi-stage analog chains |
Pinout & Package
LT6234CDD#PBF is housed in an 8-lead (3mm × 3mm) plastic DFN package with underside metal pad connected to V– (PCB connection optional). Thermal resistance θJA = 160°C/W supports moderate-power operation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Capable of sourcing/sinking ±35mA; rail-to-rail swing enables full-scale signal delivery to ADC inputs |
| 2: –IN A | Inverting input A | High-impedance node (22MΩ common-mode); matched to +IN A for precision differential gain |
| 3: +IN A | Non-inverting input A | Paired with –IN A; offset voltage match ≤800µV ensures balanced channel performance |
| 4: V– | Negative supply rail | Internally connected to underside thermal pad; recommended for PCB thermal relief and ground reference |
| 5: V+ | Positive supply rail | Accepts 3V–12.6V; PSRR ≥90dB minimizes supply ripple coupling into signal path |
| 6: OUT B | Amplifier B output | Independent output; identical specs to OUT A - supports dual-path signal conditioning |
| 7: –IN B | Inverting input B | Matched to +IN B; enables dual-channel instrumentation or stereo signal processing |
| 8: +IN B | Non-inverting input B | Electrically isolated from Channel A; no crosstalk (channel separation >120dB at 10kHz) |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in 3.3V systems - eliminates need for level-shifting circuitry before ADCs |
| Low 1.9nV/√Hz noise | Preserves signal integrity in low-amplitude applications like piezoelectric sensor interfaces and medical transducers |
| Enable pin per amplifier | Reduces quiescent current to ≤1.7µA per channel - extends battery life in portable diagnostic equipment |
| 60MHz GBW with unity-gain stability | Enables high-speed active filters and anti-aliasing stages without external compensation components |
| DFN package (3mm × 3mm) | Minimizes board area and parasitic inductance - improves high-frequency stability and EMI immunity |
Applications
| Ultrasound Signal Amplification | Low-Voltage ADC Driver |
|---|---|
Use Scenario: Amplifying weak, high-frequency echo signals from piezoelectric transducers in portable ultrasound machines. IC Role / Device Role / Timing Role: First-stage low-noise preamplifier with gain ≥20 and bandwidth >10MHz. Use Value: 1.9nV/√Hz noise floor preserves SNR of microvolt-level echoes; rail-to-rail output drives 12-bit SAR ADCs directly. | Use Scenario: Driving the input of a 16-bit successive-approximation ADC in a battery-powered data logger. IC Role / Device Role / Timing Role: Precision buffer and level shifter between sensor front-end and ADC reference domain. Use Value: ≤800µV channel-to-channel VOS match ensures accurate differential measurements; 17V/µs slew rate settles within 175ns for 0.1% accuracy. |
| Active Anti-Aliasing Filter | Rail-to-Rail Instrumentation Buffer |
Use Scenario: Implementing a 2nd-order Sallen-Key low-pass filter preceding a 1Msps ADC in industrial process monitoring. IC Role / Device Role / Timing Role: Unity-gain stable op amp configured as filter integrator and output buffer. Use Value: 60MHz GBW ensures filter response remains flat up to 100kHz; low distortion (<–80dBc at 100kHz) prevents harmonic aliasing. | Use Scenario: Isolating and scaling output of a bridge-based pressure sensor in automotive cabin air quality modules. IC Role / Device Role / Timing Role: Dual-channel non-inverting buffer with matched gain paths. Use Value: Channel matching (CMRR ≥90dB, PSRR ≥90dB) rejects common-mode interference from noisy engine control units. |
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 (10.5mA), wider GBW (210MHz), SOIC-8 package | Better suited for high-speed video or RF IF amplification where bandwidth >100MHz is required | Select ADA4898-2ARMZ only when >100MHz GBW and higher drive capability justify increased power and cost |
| OPA2350UA | Lower noise (1.8nV/√Hz), lower GBW (38MHz), no enable pin, SOIC-8 package, same 0°C–70°C temp grade | Ideal for cost-sensitive, fixed-power applications where 38MHz bandwidth suffices (e.g., audio preamps) | Choose OPA2350UA when enable functionality is unnecessary and 38MHz GBW meets system bandwidth requirements |
Compared with ADA4898-2ARMZ and OPA2350UA, LT6234CDD#PBF uniquely balances ultra-low noise (1.9nV/√Hz), 60MHz bandwidth, enable control, and DFN footprint - making it optimal for space- and power-constrained medical and portable instrumentation where both precision and efficiency are critical.
Availability
LT6234CDD#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable data acquisition modules, and industrial sensor signal conditioning requiring stable component supply across production lifecycles.
Supply support for LT6234CDD#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 LT6234CDD#PBF belongs to the LT6233/LT6234/LT6235 family - engineered specifically for low-noise, low-power, rail-to-rail signal conditioning in battery-operated and thermally constrained instrumentation applications.
FAQ
What is the operating temperature range specified for LT6234CDD#PBF?
The LT6234CDD#PBF is specified for operation from 0°C to 70°C. While designed and characterized to function across –40°C to 85°C, only the 0°C to 70°C range is fully tested and guaranteed per the manufacturer's datasheet. For extended temperature applications, the LT6234IDD#PBF variant should be selected.
Does LT6234CDD#PBF support single-supply operation?
Yes, LT6234CDD#PBF supports true single-supply operation from 3V to 12.6V. Its rail-to-rail output stage swings within 50mV of both supply rails at 5V, and its input common-mode range extends to within 1.15V of the negative rail (V–) and 2.65V of the positive rail (V+) under 3.3V supply - enabling robust signal handling in unipolar systems.
How does the enable pin on LT6234CDD#PBF function?
The enable pin on LT6234CDD#PBF controls power state per amplifier. When pulled below 0.3V (VL), the amplifier disables with supply current reduced to ≤1.7µA. When driven above V+ – 0.25V (VH), it enables with full 1.2mA per amplifier operation. Turn-on time is ≤900ns, supporting rapid wake-up in duty-cycled signal chains.
What is the maximum load current LT6234CDD#PBF can drive?
LT6234CDD#PBF can source or sink up to ±35mA per amplifier (at VS = 5V) into resistive loads. Output voltage swing remains rail-to-rail (within 50mV of rails) up to ±15mA, degrading gradually beyond that. Short-circuit current is rated at ±35mA, and thermal limits must be observed when driving sustained high-current loads.
Is LT6234CDD#PBF pin-compatible with other packages in the LT6234 family?
No - LT6234CDD#PBF uses an 8-lead DFN package with specific pinout (OUT A, –IN A, +IN A, V–, V+, OUT B, –IN B, +IN B). It is not pin-compatible with the 8-lead SOIC variant (LT6234CS8#PBF), which has different pin assignments and larger footprint. Board layout must be tailored to the DFN package's thermal pad and lead pitch.
LT6234CDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-DFN (3x3)
LT6234CDD#PBF FAQ
1.How can I place an order for LT6234CDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6234CDD#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 LT6234CDD#PBF reliable?
The price and inventory of LT6234CDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6234CDD#PBF is usually 5 days.
3.What payment methods are accepted for LT6234CDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6234CDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6234CDD#PBF?
LT6234CDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6234CDD#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 LT6234CDD#PBF?
For technical support, including LT6234CDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6234CDD#PBF requirements.
6.How does Aetrix verify that LT6234CDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT6234CDD#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 LT6234CDD#PBF meets industry standards.
7.What is the process for return or replacement of LT6234CDD#PBF?
All LT6234CDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6234CDD#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 LT6234CDD#PBF part is unused and in its original packaging.
Return procedure for LT6234CDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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