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Analog Devices Inc. LT6203IS8#PBF
- Part No.:
- LT6203IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT6203IS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:268
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Product details
Overview
LT6203IS8#PBF from Analog Devices (formerly Linear Technology) is a dual, rail-to-rail input/output, ultralow-noise operational amplifier with 1.9nV/√Hz input voltage noise, 100MHz gain bandwidth product, and 25V/µs slew rate. It operates from 2.5V to 12.6V supplies, draws 2.5mA per amplifier at 5V, and is specified over –40°C to +85°C for industrial signal conditioning in precision data acquisition and A/D driver applications.
For engineers reviewing the LT6203IS8#PBF datasheet, LT6203IS8#PBF pinout, LT6203IS8#PBF application, or LT6203IS8#PBF equivalent, key selection criteria include its guaranteed rail-to-rail output swing (≤260mV from rails at 15mA), low distortion (–80dBc at 1MHz), and standard SO-8 op amp pinout compatibility for drop-in upgrades in battery-powered instrumentation and DSL receiver front-ends.
Technical Context
The LT6203IS8#PBF implements a unity-gain-stable voltage-feedback architecture optimized for low-supply, high-fidelity signal chains. Its input stage uses complementary bipolar transistors to achieve both rail-to-rail common-mode range (including both supply rails) and ultralow 1.9nV/√Hz voltage noise at 100kHz.
It delivers 30mA minimum output current into resistive loads while maintaining <0.7mV typical input offset voltage and 90dB typical CMRR across its full operating temperature range, enabling direct driving of SAR and sigma-delta ADC inputs without external level-shifting or gain compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Voltage Density | 1.9nV/√Hz at 100kHz - enables high-resolution sensor signal amplification without degrading SNR in 16-bit+ data acquisition systems |
| Gain Bandwidth Product | 100MHz - supports closed-loop gains up to 10 at 10MHz or unity gain at full 100MHz for wideband active filtering |
| Slew Rate | 25V/µs - ensures faithful reproduction of fast transient signals such as pulse outputs from photodiode transimpedance stages |
| Supply Current per Amp | 2.5mA at 5V - allows dual-channel operation under 5.5mW total quiescent power for portable medical or IoT edge nodes |
| Input Common-Mode Range | Rail-to-rail (V– to V+) - eliminates need for external biasing when interfacing with single-supply sensors or DACs |
| Output Swing | Within 260mV of rails at 15mA - provides >4.5Vpp dynamic range on 5V supply for maximum ADC utilization |
| Harmonic Distortion | –80dBc at 1MHz - meets spectral purity requirements for DSL line receiver differential signal paths |
Pinout & Package
LT6203IS8#PBF is housed in an 8-lead plastic SO (S8) package with standard dual op amp pinout and 1.27mm lead pitch. The package is RoHS-compliant, lead-free, and rated for 190°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives loads up to 30mA with rail-to-rail swing; requires local 0.1µF bypass to V– |
| 2 | –IN A | Inverting input of Amplifier A - high-impedance node; layout symmetry critical for matching with +IN A |
| 3 | +IN A | Non-inverting input of Amplifier A - accepts DC-coupled signals from 0V to V+; matched to –IN A for <0.3mV offset |
| 4 | V– | Negative supply rail - connects to ground or negative rail; undersurface metal not bonded in SO-8 variant |
| 5 | V+ | Positive supply rail - accepts 2.5V to 12.6V; must be decoupled within 5mm of pin with ≥1µF ceramic |
| 6 | –IN B | Inverting input of Amplifier B - electrically identical to Pin 2; channel-to-channel offset match ≤0.3mV |
| 7 | +IN B | Non-inverting input of Amplifier B - matches Pin 3; enables dual-channel synchronous sampling architectures |
| 8 | OUT B | Amplifier B output - independent of OUT A; supports dual-path signal processing without crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables single-supply operation down to 2.5V while preserving full input dynamic range and >4.5Vpp output swing on 5V |
| Ultralow 1.9nV/√Hz noise | Reduces integrated noise to <3.5µV RMS over 100kHz bandwidth - critical for strain gauge and thermopile front-ends |
| Unity-gain stable | Eliminates need for external compensation components in buffer, gain-of-one, or active filter configurations |
| –40°C to +85°C operation | Guaranteed performance across industrial ambient temperatures without derating or thermal management overhead |
| Low distortion (–80dBc) | Preserves signal integrity in DSL and video line drivers where harmonic content directly impacts bit error rate |
Applications
| High-Speed Data Acquisition | DSL Line Receiver Front-End |
|---|---|
Use Scenario: Driving the analog input of a 1MSPS, 16-bit SAR ADC in portable test equipment with ±2.5V input range. IC Role / Device Role / Timing Role: Precision buffer and level shifter that maintains DC accuracy and preserves small-signal AC fidelity up to 500kHz. Use Value: Delivers <0.7mV offset and <3.5µV RMS integrated noise over 100kHz, ensuring >15.5 ENOB without calibration. | Use Scenario: Differential receiver stage in ADSL2+ line card, rejecting common-mode noise on twisted-pair copper lines. IC Role / Device Role / Timing Role: Low-noise, low-distortion differential amplifier with rail-to-rail output swing for optimal ADC dynamic range utilization. Use Value: –80dBc THD at 1MHz enables >70dB carrier-to-noise ratio in upstream channels, meeting ITU-T G.992.5 spec. |
| Battery-Powered Medical Sensor Interface | Rail-to-Rail Active Filter Stage |
Use Scenario: Amplifying microvolt-level ECG signals from dry electrodes in wearable heart-rate monitors powered by 3.3V Li-ion cells. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with DC-coupled rail-to-rail input to capture baseline wander and low-frequency ST segments. Use Value: 1.9nV/√Hz noise density and 2.5mA supply current enable >100dB SNR at 100Hz while extending battery life beyond 7 days. | Use Scenario: 4th-order Butterworth anti-aliasing filter preceding a 12-bit µP-integrated ADC in motor control feedback loops. IC Role / Device Role / Timing Role: Dual-channel unity-gain stable op amp implementing two 2nd-order sections with precise pole placement. Use Value: 100MHz GBW ensures <0.1° phase error at 100kHz cutoff, preserving timing accuracy of current-sense zero-crossing detection. |
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; 225MHz GBW; only specified to +125°C | Better for RF/IF gain blocks requiring >100MHz closed-loop bandwidth; less suitable for ultra-low-power battery designs | Select ADA4897-2ARMZ when noise floor is primary constraint and power budget allows +0.5mA per channel |
| OPA2350UA | Higher 7nV/√Hz noise; lower 5.5mA supply current; rail-to-rail I/O; only 38MHz GBW; no guaranteed –40°C to +85°C performance | Cost-optimized for consumer-grade audio buffers where noise and speed are secondary to BOM cost | Select OPA2350UA only for non-industrial applications where 1.9nV/√Hz noise and 100MHz GBW are not required |
Compared with ADA4897-2ARMZ and OPA2350UA, the LT6203IS8#PBF uniquely balances ultralow noise (1.9nV/√Hz), low power (2.5mA), and guaranteed industrial temperature operation in a standard SO-8 footprint - making it optimal for precision, battery-sensitive, and thermally demanding embedded signal chains.
Availability
LT6203IS8#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, DSL line receivers, battery-powered medical sensors, and rail-to-rail active filter applications requiring stable component supply across extended temperature ranges.
Supply support for LT6203IS8#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 LT6203 belongs to ADI's legacy Linear Technology precision op amp portfolio, designed specifically for low-noise, low-power, rail-to-rail signal conditioning in space-constrained, thermally demanding industrial and instrumentation systems.
FAQ
What is the guaranteed operating temperature range for LT6203IS8#PBF?
The LT6203IS8#PBF is guaranteed to meet all specifications over the industrial temperature range of –40°C to +85°C. This is confirmed by the "I" grade suffix and validated through production testing - unlike "C" grade parts, which are only characterized but not tested across this full range. The LT6203IS8#PBF maintains 1.9nV/√Hz noise and 100MHz GBW throughout this interval.
Does LT6203IS8#PBF support true rail-to-rail input and output operation?
Yes, the LT6203IS8#PBF supports true rail-to-rail input common-mode voltage range (V– to V+) and rail-to-rail output voltage swing. At 5V supply and 15mA load, output saturation is ≤260mV from each rail, delivering >4.5Vpp linear range. Input stage biasing allows DC coupling of signals referenced to either supply rail - a key capability confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables for LT6203IS8#PBF.
What is the typical supply current per amplifier for LT6203IS8#PBF at 3V and 5V operation?
The LT6203IS8#PBF draws 2.3mA per amplifier at 3V and 2.5mA per amplifier at 5V, as specified in the Electrical Characteristics table under "IS Supply Current per Amp" at TA = 25°C. These values are guaranteed maximums of 2.85mA and 3.0mA respectively across the –40°C to +85°C range, enabling predictable power budgeting in dual-channel low-voltage systems using LT6203IS8#PBF.
Can LT6203IS8#PBF drive heavy capacitive loads without instability?
The LT6203IS8#PBF is unity-gain stable but exhibits degraded phase margin with capacitive loads >100pF. For loads exceeding this - such as ADC input capacitance or long PCB traces - a series resistor (≥20Ω) between LT6203IS8#PBF output and the load is required to maintain stability. This design constraint is documented in the Applications section and verified via SPICE simulation models provided by Analog Devices for LT6203IS8#PBF.
Is LT6203IS8#PBF pin-compatible with other dual op amps in SO-8 packages?
Yes, the LT6203IS8#PBF uses the industry-standard dual op amp pinout (OUT A, –IN A, +IN A, V–, V+, –IN B, +IN B, OUT B) defined in JEDEC MS-012, making it a direct PCB replacement for LM258, TL082, and AD822 in existing SO-8 layouts. However, due to its significantly lower noise (1.9nV/√Hz vs. 16nV/√Hz for LM258) and higher speed, system-level validation of settling time and distortion is recommended when upgrading to LT6203IS8#PBF.
LT6203IS8#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:
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT6203IS8#PBF FAQ
1.How can I place an order for LT6203IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT6203IS8#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 LT6203IS8#PBF reliable?
The price and inventory of LT6203IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT6203IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT6203IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT6203IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT6203IS8#PBF?
LT6203IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT6203IS8#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 LT6203IS8#PBF?
For technical support, including LT6203IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT6203IS8#PBF requirements.
6.How does Aetrix verify that LT6203IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT6203IS8#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 LT6203IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT6203IS8#PBF?
All LT6203IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT6203IS8#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 LT6203IS8#PBF part is unused and in its original packaging.
Return procedure for LT6203IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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