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Analog Devices Inc. LTC6228IS8#PBF
- Part No.:
- LTC6228IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC6228IS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:5,978
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Product details
Overview
LTC6228IS8#PBF from Analog Devices is a single-channel, rail-to-rail output, unity-gain stable operational amplifier optimized for high-speed, low-noise signal conditioning. It delivers 730MHz –3dB bandwidth (AV = +1), 890MHz gain-bandwidth product, 500V/µs slew rate, and ultra-low 0.88nV/√Hz input voltage noise - enabling precision driving of high-resolution SAR ADCs like the LTC2387-18 in 15Msps data acquisition systems.
For engineers reviewing the LTC6228IS8#PBF datasheet, LTC6228IS8#PBF pinout, LTC6228IS8#PBF application, or LTC6228IS8#PBF equivalent, key selection criteria include its shutdown capability (500µA disable current), rail-to-rail output swing (±16mV from rails at 25mA), ±40°C to +85°C industrial temperature range, and SOIC-8 package compatibility with legacy high-speed op amp footprints.
Technical Context
The LTC6228IS8#PBF employs a proprietary high-speed bipolar complementary architecture to achieve simultaneous low noise, high slew rate, and unity-gain stability. Its internal bias current cancellation circuitry is digitally controlled via the SHDN pin, allowing dynamic optimization between input current noise (3pA/√Hz disabled vs. 6.3pA/√Hz enabled) and offset drift (0.4µV/°C).
It operates from 2.8V to 11.75V total supply range (±1.4V to ±5.875V), supports input common-mode voltage down to V– – 0.1V, and maintains >113dB open-loop gain (RL = 1kΩ) and >94dB CMRR across frequency - making it suitable for DC-coupled, wide-dynamic-range front-ends where gain accuracy and harmonic distortion (<–100dBc at 2MHz, 4VP-P) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 890MHz - enables stable closed-loop gain ≥10 at >89MHz, supporting wideband active filtering and buffer applications. |
| –3dB Bandwidth (AV = +1) | 730MHz - ensures minimal phase loss for fast pulse signals up to ~115MHz (0.35/tr rule). |
| Slew Rate | 500V/µs - supports full-scale 8VP-P output transitions in <16ns, critical for driving ADC inputs without slewing-induced distortion. |
| Input Voltage Noise | 0.88nV/√Hz @ 1MHz - contributes <1.2µVRMS integrated noise in 10MHz bandwidth, preserving SNR in 18-bit ADC interfaces. |
| Supply Current | 16mA typical per channel - balances speed and power for battery-sensitive or thermally constrained PCB layouts. |
| Shutdown Current | 500µA max - reduces system idle power by >97%, enabling power-gated signal chains in portable instrumentation. |
| Input Offset Drift | 0.4µV/°C - limits offset shift to <32µV over –40°C to +85°C, ensuring DC accuracy in uncalibrated sensor amplifiers. |
Pinout & Package
Package: 8-Lead Plastic SOIC (S8), 5.0mm × 6.2mm body, standard JEDEC MS-012AC footprint, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SHDN) | Shutdown control input | Active-high logic: VH ≥ V+ – 1.6V enables amplifier; VL ≤ V+ – 2.65V disables output and reduces IQ to 500µA. |
| 2 (V+) | Positive supply rail | Accepts 2.8V to 11.75V total supply; PSRR+ >95dB ensures immunity to digital supply noise. |
| 3 (OUT) | Amplifier output | Rail-to-rail swing: within 16mV of V– and 50mV of V+ at 25mA load; capable of sourcing/sinking ±80mA. |
| 4 (V–) | Negative supply rail | Supports dual-supply (±1.4V to ±5.875V) or single-supply (0V to 11.75V) operation; FB pin internally tied to V–. |
| 5 (FB) | Feedback reference | Internally connected to V–; used for level-shifting configurations and single-supply biasing networks. |
| 6 (–IN) | Inverting input | Differential input capacitance = 3.5pF; supports stable transimpedance designs up to ~100MHz with proper layout. |
| 7 (+IN) | Non-inverting input | Common-mode range extends to V– – 0.1V; enables ground-referenced sensing in single-supply systems. |
| 8 (NC) | No connect | Not internally bonded; left unconnected per datasheet - no routing or grounding required. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise floor | 0.88nV/√Hz enables <93.4dB SNR when driving LTC2387-18 at 15Msps, matching 18-bit ENOB requirements. |
| Programmable bias current cancellation | SHDN pin double-function: enables/disables both amplifier output and input bias current cancellation for optimal noise vs. offset trade-off. |
| Rail-to-rail output with high current drive | Delivers ±80mA min output current while maintaining <280mV saturation voltage at 25mA sink, supporting low-impedance ADC input termination. |
| Wide supply range with robust PSRR | Operates from 2.8V to 11.75V with >95dB PSRR+ and >99dB PSRR– up to 1MHz, simplifying mixed-signal power domain partitioning. |
| Specified performance over industrial temperature | All key AC/DC specs (GBW, SR, VOS, noise) guaranteed from –40°C to +85°C - eliminates derating in base station or test equipment designs. |
Applications
| High-Speed Data Acquisition | Low-Voltage Precision Instrumentation |
|---|---|
Use Scenario: Driving the analog input of 18-bit, 15Msps SAR ADCs (e.g., LTC2387-18) in automated test equipment. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer and level shifter, preserving signal integrity during fast full-scale transitions. Use Value: Achieves 93.4dB SNR and 95dB SFDR in FFT testing - directly attributable to 0.88nV/√Hz noise and <34ns 4V settling time. | Use Scenario: Amplifying microvolt-level sensor outputs (e.g., strain gauges, thermopiles) in handheld medical devices. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-µV offset drift and high CMRR for rejecting supply and EMI interference. Use Value: 0.4µV/°C drift and >94dB CMRR ensure <1 LSB error over temperature without calibration in 16-bit systems. |
| Video Signal Conditioning | Optical Transimpedance Amplification |
Use Scenario: NTSC/PAL video line driver in broadcast monitoring equipment requiring minimal differential gain/phase error. IC Role / Device Role / Timing Role: Unity-gain stable video buffer with 0.001% differential gain and 0.004° differential phase error. Use Value: Meets SMPTE RP 168 spec for broadcast-grade video fidelity without external trimming components. | Use Scenario: High-bandwidth photodiode amplifier in optical time-of-flight (ToF) sensors for LiDAR or gesture recognition. IC Role / Device Role / Timing Role: Low-input-capacitance (3.5pF), low-noise TIA front-end enabling >100MHz small-signal bandwidth. Use Value: 730MHz closed-loop bandwidth supports sub-nanosecond pulse response, critical for cm-level ToF resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-1ARMZ | Higher 1.05nV/√Hz noise, lower 280MHz GBW, no shutdown, MSOP-8 package | Better DC precision (125µV VOS max), but insufficient bandwidth for >10Msps ADC driving | Select only for DC-optimized, non-power-gated applications where 280MHz GBW suffices. |
| LMH6629MA/NOPB | Higher 1.4nV/√Hz noise, 1.5GHz GBW, no rail-to-rail output, SOIC-8 | Superior speed for RF IF buffering, but output clips ~1.2V from rails - incompatible with full-scale ADC input ranges | Choose when >1GHz bandwidth is mandatory and output swing constraints are relaxed. |
Compared with ADA4898-1ARMZ and LMH6629MA/NOPB, the LTC6228IS8#PBF uniquely combines 730MHz bandwidth, 0.88nV/√Hz noise, rail-to-rail output, and shutdown - making it the only SOIC-8 option meeting all four requirements for high-fidelity, power-aware ADC interface design.
Availability
LTC6228IS8#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, precision instrumentation, video signal conditioning, and optical transimpedance amplifier designs requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC6228IS8#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 semiconductors, serving industrial, communications, automotive, and healthcare markets.
The LTC6228 family was designed specifically for wide-dynamic-range, high-speed signal chain applications - emphasizing ultra-low noise, rail-to-rail output, and low distortion to replace legacy op amps in ADC drivers, active filters, and precision instrumentation front-ends.
FAQ
What is the maximum supply voltage rating for the LTC6228IS8#PBF?
The LTC6228IS8#PBF has an absolute maximum total supply voltage (V+ to V–) of 12V. Operation is specified across a 2.8V to 11.75V range, supporting ±1.4V to ±5.875V dual supplies or 0V to 11.75V single supplies. Exceeding 12V risks permanent damage per Absolute Maximum Ratings.
Does the LTC6228IS8#PBF support true rail-to-rail input common-mode range?
The LTC6228IS8#PBF supports input common-mode voltage down to V– – 0.1V but does not extend to V+ - its upper limit is V+ – 1.2V. It achieves rail-to-rail *output* swing (within 16mV of V– and 50mV of V+ at 25mA), but input range is not fully rail-to-rail. This allows ground-referenced inputs in single-supply use cases.
How does the SHDN pin control bias current cancellation in the LTC6228IS8#PBF?
The SHDN pin on the LTC6228IS8#PBF serves dual functions: applying VH ≥ V+ – 1.6V enables both amplifier operation *and* internal bias current cancellation, reducing input bias current to ±2.5µA typical; applying VL ≤ V+ – 1.0V disables cancellation (bias current rises to ±40µA), optimizing for lowest voltage noise (0.88nV/√Hz) at the expense of higher input current noise.
What is the typical settling time of the LTC6228IS8#PBF for a 4V step at unity gain?
The LTC6228IS8#PBF achieves 34ns settling time to 0.1% for a 4V output step under unity-gain conditions with a 1kΩ load. This is measured with RL = 1kΩ to half-supply and reflects its 500V/µs slew rate and 730MHz bandwidth - critical for minimizing dead time in multiplexed data acquisition systems.
Is the LTC6228IS8#PBF pin-compatible with other SOIC-8 op amps like the LT1364 or AD8065?
No, the LTC6228IS8#PBF is not pin-compatible with LT1364 or AD8065. Its pin 5 is FB (internally tied to V–), whereas LT1364 pin 5 is NC and AD8065 pin 5 is V–. Additionally, SHDN is on pin 1 (vs. NC or compensation pins on legacy parts), requiring PCB layout revision for drop-in replacement.
LTC6228IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 500V/µs
- Gain Bandwidth Product:
- 890 MHz
- -3db Bandwidth:
- 730 MHz
- Current - Input Bias:
- 16 µA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 16mA
- Current - Output / Channel:
- 140 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 11.75 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LTC6228IS8#PBF FAQ
1.How can I place an order for LTC6228IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6228IS8#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 LTC6228IS8#PBF reliable?
The price and inventory of LTC6228IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6228IS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC6228IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6228IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6228IS8#PBF?
LTC6228IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6228IS8#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 LTC6228IS8#PBF?
For technical support, including LTC6228IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6228IS8#PBF requirements.
6.How does Aetrix verify that LTC6228IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC6228IS8#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 LTC6228IS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC6228IS8#PBF?
All LTC6228IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6228IS8#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 LTC6228IS8#PBF part is unused and in its original packaging.
Return procedure for LTC6228IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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