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Analog Devices Inc. LT6203CDD#PBF
- Part No.:
- LT6203CDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT6203CDD#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
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Product details
Overview
LT6203CDD#PBF from Analog Devices (formerly Linear Technology) is a dual rail-to-rail input/output, ultralow-noise operational amplifier in an 8-lead 3mm × 3mm DFN package. It delivers 1.9nV/√Hz input voltage noise at 100kHz, 100MHz gain bandwidth, and 25V/µs slew rate while drawing only 2.5mA per amplifier at 5V supply - optimized for precision signal conditioning in low-power, wide-supply-range (2.5V–12.6V) systems such as DSL receivers and battery-backed data acquisition.
For engineers reviewing the LT6203CDD#PBF datasheet, LT6203CDD#PBF pinout, LT6203CDD#PBF application, or LT6203CDD#PBF equivalent, key selection criteria include its guaranteed 0°C to 70°C operating range, DFN thermal performance (θJA = 43°C/W), rail-to-rail output swing within 35mV of rails at 15mA load, and channel-to-channel matching specs critical for differential receiver topologies.
Technical Context
The LT6203CDD#PBF integrates two fully independent, unity-gain-stable amplifiers with matched input bias current (<0.6µA), common-mode rejection ratio ≥83dB (typ), and power supply rejection ratio ≥70dB (typ). Its architecture supports single-supply operation down to 2.5V and maintains low distortion (–80dBc at 1MHz) across ±5V, 5V, and 3V configurations.
Designed for high-fidelity analog front-ends, it features input common-mode range extending to both supply rails, output drive capability of ±30mA, and integrated noise performance validated over 25kHz–150kHz bandwidth - directly enabling use in active filters, A/D driver stages, and local echo cancellation circuits without external level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 100kHz - enables sub-µV signal resolution in sensor interfaces and low-level audio paths |
| Gain Bandwidth Product | 100MHz - supports stable closed-loop gain up to 10× at 10MHz or unity gain at full 100MHz |
| Slew Rate | 25V/µs - ensures faithful reproduction of fast transients in pulse amplification and video buffering |
| Supply Current per Amp | 2.5mA max at 5V - allows dual-channel operation under 5.5mA total, ideal for portable instrumentation |
| Input Offset Voltage | 0.7mV max (TA = 0°C to 70°C, VCM = half supply) - reduces DC error in precision gain stages |
| Output Swing | Within 35mV of rails at 15mA load - maximizes dynamic range in 3.3V and 5V systems |
| Common-Mode Rejection | 83dB typ (VCM = 1.5V–3.5V) - suppresses supply-coupled interference in noisy industrial environments |
Pinout & Package
LT6203CDD#PBF uses an 8-lead (3mm × 3mm) plastic DFN package with exposed metal pad connected to V– for thermal enhancement. Pinout follows standard dual op amp configuration with independent inputs and outputs per channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Drives loads up to ±30mA; rail-to-rail swing supports full-scale ADC interfacing |
| 2: –IN A | Inverting input A | High-impedance node (4MΩ common-mode); accepts signals from V– to V+ |
| 3: +IN A | Non-inverting input A | Matches –IN A offset and bias; enables precision differential sensing |
| 4: V– | Negative supply / ground reference | Connected to underside metal pad; primary thermal path and return for both amplifiers |
| 5: V+ | Positive supply | Accepts 2.5V–12.6V; PSRR ≥70dB minimizes supply ripple coupling |
| 6: OUT B | Amplifier B output | Electrically isolated from OUT A; enables dual-path signal processing |
| 7: –IN B | Inverting input B | Channel-matched to –IN A (offset match ≤0.9mV); critical for balanced receiver designs |
| 8: +IN B | Non-inverting input B | Paired with –IN B for second independent gain stage or feedback path |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode range includes both supplies; output swings within 35mV of rails at 15mA - eliminates need for level-shifting in 3.3V systems |
| Ultralow 1.9nV/√Hz noise | Enables detection of µV-level signals in medical ECG front-ends and geophysical sensors without added gain-stage noise penalty |
| Unity-gain stability | Operates reliably at gain = 1 without external compensation - simplifies design of buffers and followers |
| Low 2.5mA supply current per amp | Supports dual-channel operation under 5.5mA total - extends battery life in portable test equipment and IoT edge nodes |
| DFN thermal performance (θJA = 43°C/W) | Enables high-output-current operation (±30mA) without heatsink in space-constrained layouts |
Applications
| DSL Receiver Front-End | Rail-to-Rail Buffer Amplifier |
|---|---|
Use Scenario: Differential line receiver in ADSL/VDSL modems requiring high SNR over 25kHz–150kHz band. IC Role / Device Role / Timing Role: Dual-channel amplifier configured as active filter and echo canceller with matched gain and phase response. Use Value: 1.9nV/√Hz noise and –80dBc THD at 1MHz preserve signal integrity during analog-to-digital conversion of upstream/downstream channels. | Use Scenario: Isolation buffer between high-impedance sensor and low-impedance ADC input in portable instrumentation. IC Role / Device Role / Timing Role: Unity-gain follower with rail-to-rail output swing to maximize dynamic range of 12-bit+ converters. Use Value: Output swing within 35mV of rails at 15mA load ensures >98% utilization of 3.3V ADC reference voltage. |
| Low-Power Data Acquisition | Battery-Powered Signal Chain |
Use Scenario: Precision gain stage in handheld multimeters or environmental monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Dual op amp providing programmable gain (1–10×) and anti-alias filtering before SAR ADC sampling. Use Value: 2.5mA per amplifier enables continuous operation for >100 hours on CR2032, while 100MHz GBW supports oversampling at 1MSps. | Use Scenario: Signal conditioning block in wearable health devices requiring minimal quiescent power and small PCB footprint. IC Role / Device Role / Timing Role: Dual-channel amplifier driving analog front-end of optical PPG or ECG ASIC with low-noise biasing. Use Value: 3mm × 3mm DFN package saves >40% board area vs SO-8; 1.9nV/√Hz noise preserves microvolt-level biopotential signals. |
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 |
|---|---|---|---|
| ADA4897-2ARMZ | Lower 1.1nV/√Hz noise but higher 3.5mA supply current; 220MHz GBW; MSOP-8 package | Better for RF/IF signal chains requiring >100MHz bandwidth; less suitable for battery-limited runtime | Select when noise floor dominates over power budget and bandwidth exceeds 100MHz |
| OPA2350UA/2K5 | Higher 7nV/√Hz noise; lower 1.8mA supply current; SO-8 package; rail-to-rail I/O | Cost-optimized for consumer-grade portable electronics where sub-2nV/√Hz noise is unnecessary | Select when system SNR requirements allow >5× higher input noise and thermal performance is non-critical |
Compared with ADA4897-2ARMZ and OPA2350UA/2K5, the LT6203CDD#PBF uniquely balances ultralow 1.9nV/√Hz noise, 100MHz bandwidth, and 2.5mA supply current in a thermally efficient DFN - making it optimal for DSL receivers and battery-powered precision data loggers where both noise and power are constrained.
Availability
LT6203CDD#PBF is available at Aetrix Electronics and suitable for DSL receivers, portable instrumentation, and battery-backed data acquisition systems requiring stable component supply, long-term lifecycle support, and consistent DFN package availability.
Supply support for LT6203CDD#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 acquired Linear Technology in 2017 and maintains its high-performance analog portfolio, emphasizing precision, speed, and power efficiency across signal chain components.
The LT6203CDD#PBF belongs to Linear's LT620x family of ultralow-noise, rail-to-rail op amps designed specifically for demanding signal conditioning in communications infrastructure, test equipment, and portable medical devices.
FAQ
What is the operating temperature range specified for the LT6203CDD#PBF?
The LT6203CDD#PBF is characterized and guaranteed over 0°C to 70°C ambient temperature (Commercial grade). This is explicitly defined in the "ORDER INFORMATION" table where "LT6203CDD#PBF" maps to "0°C to 70°C" and "C" suffix denotes the commercial temperature grade. The device may function outside this range but is not tested or warranted beyond these limits.
Does the LT6203CDD#PBF require external compensation for unity-gain stability?
No, the LT6203CDD#PBF is internally compensated and unity-gain stable. The datasheet states "unity gain stable" as a core feature and confirms stability in typical applications including voltage followers and active filters without added capacitors or resistors. This eliminates design risk in buffer and gain-of-one configurations.
What is the maximum output current capability of each amplifier in the LT6203CDD#PBF?
Each amplifier in the LT6203CDD#PBF delivers a minimum output current of ±30mA into a resistive load, as specified under "ISC Short-Circuit Current" (±30mA at VS = 5V) and verified in the "Output Voltage Swing" test conditions (e.g., ISINK = 15mA, ISOURCE = 15mA). This enables direct driving of moderate-impedance loads like ADC inputs or coaxial cable terminations.
How does the LT6203CDD#PBF achieve rail-to-rail input operation?
The LT6203CDD#PBF achieves rail-to-rail input operation through complementary input transistor pairs (PMOS and NMOS) that remain active across the full supply range - from V– to V+. This is confirmed by the "Input Common Mode Range Includes Both Rails" feature and electrical specs showing valid operation at VCM = V– and VCM = V+, enabling accurate signal capture near supply rails without clipping.
Is the underside metal pad of the LT6203CDD#PBF's DFN package electrically connected?
Yes, the underside metal pad of the LT6203CDD#PBF's DFN package is electrically connected to the V– pin (Pin 4), as explicitly stated in the "PIN CONFIGURATION" diagram: "UNDERSIDE METAL CONNECTED TO V–". This connection provides both thermal conduction and a low-inductance ground return path critical for high-frequency stability and noise performance.
LT6203CDD#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:
- 25V/µs
- Gain Bandwidth Product:
- 100 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 3.8 µA
- Voltage - Input Offset:
- 2.6 mV
- Current - Supply:
- 2.8mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 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)
LT6203CDD#PBF FAQ
1.How can I place an order for LT6203CDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6203CDD#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 LT6203CDD#PBF reliable?
The price and inventory of LT6203CDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6203CDD#PBF is usually 5 days.
3.What payment methods are accepted for LT6203CDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6203CDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6203CDD#PBF?
LT6203CDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6203CDD#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 LT6203CDD#PBF?
For technical support, including LT6203CDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6203CDD#PBF requirements.
6.How does Aetrix verify that LT6203CDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT6203CDD#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 LT6203CDD#PBF meets industry standards.
7.What is the process for return or replacement of LT6203CDD#PBF?
All LT6203CDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6203CDD#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 LT6203CDD#PBF part is unused and in its original packaging.
Return procedure for LT6203CDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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