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Analog Devices Inc. LT1806IS8#PBF
- Part No.:
- LT1806IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1806IS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:274
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Product details
Overview
LT1806IS8#PBF from Analog Devices (formerly Linear Technology) is a single, rail-to-rail input and output precision operational amplifier optimized for low-voltage, high-frequency signal conditioning. It delivers a 325MHz gain-bandwidth product, 140V/μs slew rate, and 85mA output current, with 3.5nV/√Hz input voltage noise and –80dBc harmonic distortion at 5MHz - enabling high-fidelity driving of ADCs and video line applications.
For engineers reviewing the LT1806IS8#PBF datasheet, LT1806IS8#PBF pinout, LT1806IS8#PBF application, or LT1806IS8#PBF equivalent, key selection considerations include its shutdown functionality, ±40°C to +85°C industrial temperature rating, SO-8 package with standard op amp pinout, and verified rail-to-rail swing within 20mV of both rails at 3V–12.6V supplies.
Technical Context
The LT1806IS8#PBF employs a complementary bipolar input stage enabling rail-to-rail common-mode input range and low distortion across supply voltages from 2.5V to 12.6V. Its unity-gain stable architecture supports high-speed closed-loop configurations without external compensation.
Integrated power-down logic on Pin 5 (SHDN) reduces supply current to 0.4mA while maintaining high-impedance output state. The device maintains 106dB CMRR and 105dB PSRR at DC, with performance validated over –40°C to +85°C per the I-grade specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 325MHz - enables stable unity-gain operation up to ~300MHz and supports wideband active filter or buffer designs. |
| Slew Rate | 140V/μs - ensures faithful reproduction of fast transient signals such as video sync pulses or high-speed DAC outputs. |
| Input Voltage Noise | 3.5nV/√Hz @ 10kHz - preserves SNR in precision sensor front-ends and low-level analog signal chains. |
| Output Current | ±85mA - drives heavy loads including 50Ω transmission lines, capacitive DAC references, or multiple downstream inputs. |
| Supply Range | 2.5V to 12.6V - supports single-supply 3V/5V systems and split-supply ±5V instrumentation without level-shifting. |
| Shutdown Current | 0.4mA @ 5V - enables low-power sleep modes in battery-operated or energy-conscious embedded systems. |
| Harmonic Distortion | –80dBc @ 5MHz - meets demanding THD requirements for 12-bit+ data acquisition and broadcast-quality video buffering. |
Pinout & Package
LT1806IS8#PBF is housed in an 8-lead plastic SO (Small Outline) package with standard op amp pinout and thermal pad connected to V–. Package dimensions comply with JEDEC MS-012AA, θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output capable of sourcing/sinking ±85mA and swinging within 20mV of either rail. |
| 2 | V– | Negative supply terminal; also serves as thermal and electrical reference for internal biasing. |
| 3 | +IN | Non-inverting input with rail-to-rail common-mode range and 2pF input capacitance. |
| 4 | –IN | Inverting input matched to +IN for <200μV offset voltage shift over full common-mode range. |
| 5 | SHDN | Active-low shutdown control: <0.3V disables amplifier, >V+–0.5V enables; 80ns turn-on time. |
| 6 | V+ | Positive supply terminal; supports supplies up to 12.6V total (V+ to V–). |
| 7 | NC | No connect - internally unused; must be left floating or grounded per layout best practices. |
| 8 | NC | No connect - internally unused; must be left floating or grounded per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables maximum dynamic range in low-voltage systems (e.g., 3V ADC drivers), eliminating level-shifting circuitry. |
| Power-down capability | Reduces quiescent current from 16mA to 0.4mA, extending battery life in portable instrumentation and IoT edge nodes. |
| Low 3.5nV/√Hz input noise | Maintains signal integrity in high-gain sensor interfaces (e.g., strain gauge, thermopile) without degrading system SNR. |
| –80dBc distortion @ 5MHz | Supports accurate digitization of high-frequency analog signals in 10Msps+ data acquisition systems. |
| Unity-gain stable | Eliminates need for external compensation components, simplifying PCB layout and reducing BOM count. |
Applications
| ADC Driver | Video Line Driver |
|---|---|
Use Scenario: Driving the analog input of a 12-bit, 10Msps SAR ADC in a portable medical sensor module operating from a 3.3V supply. IC Role / Device Role / Timing Role: Precision buffer and level shifter ensuring full-scale signal delivery with minimal settling error and distortion. Use Value: 120ns 0.01% settling time and –80dBc SFDR preserve ENOB; rail-to-rail swing maximizes ADC utilization without external biasing. | Use Scenario: Buffering composite NTSC video signals in a security camera DVR board with 150Ω coaxial output termination. IC Role / Device Role / Timing Role: High-speed, low-distortion line driver delivering 2VP-P signal with precise differential gain/phase fidelity. Use Value: 0.01% differential gain and 0.01° differential phase errors meet broadcast video standards; 85mA drive sustains 150Ω load. |
| Active Filter | Rail-to-Rail Sensor Interface |
Use Scenario: Implementing a 5MHz 4th-order Butterworth anti-aliasing filter preceding a high-speed ADC in test equipment. IC Role / Device Role / Timing Role: Unity-gain stable, high-slew-rate op amp serving as active integrator and gain stage in multi-pole topology. Use Value: 325MHz GBW ensures filter response accuracy beyond cutoff; low noise avoids degrading filter SNR. | Use Scenario: Amplifying output of a low-output piezoresistive pressure sensor (±20mV full scale) in an industrial process controller. IC Role / Device Role / Timing Role: Precision, low-drift instrumentation amplifier front-end with rail-to-rail input to accommodate sensor offset and common-mode drift. Use Value: 550μV max input offset and 1.5μV/°C drift ensure stable zero-point calibration; 106dB CMRR rejects supply noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4897-1ARZ-R7 | Lower 1nV/√Hz noise, but only 200MHz GBW and no shutdown pin; 12.6V max supply vs LT1806's 12.6V absolute max. | Better for ultra-low-noise sensor preamps; unsuitable where shutdown or >200MHz bandwidth is required. | Select when noise dominates over speed and power-down is unnecessary. |
| OPA656U | Higher 500MHz GBW and 250V/μs slew, but higher 7.1nV/√Hz noise, no rail-to-rail input, and no shutdown function. | Preferred for RF IF amplification or photodiode transimpedance; not viable for rail-to-rail input or low-voltage systems. | Choose for bandwidth-critical non-rail-to-rail applications where noise is secondary. |
Compared with ADA4897-1ARZ-R7 and OPA656U, the LT1806IS8#PBF uniquely balances 325MHz bandwidth, rail-to-rail I/O, integrated shutdown, and 3.5nV/√Hz noise - making it optimal for space-constrained, low-voltage, high-fidelity signal chain stages requiring configurability and power efficiency.
Availability
LT1806IS8#PBF is available at Aetrix Electronics and suitable for industrial instrumentation, medical data acquisition, broadcast video infrastructure, and test & measurement equipment requiring stable component supply across extended temperature ranges.
Supply support for LT1806IS8#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, formed through the acquisition of Linear Technology in 2017.
The LT1806IS8#PBF belongs to ADI's legacy Linear Technology precision high-speed op amp family, engineered specifically for low-voltage, wideband signal conditioning in data acquisition, communications, and imaging systems.
FAQ
What is the operating temperature range for the LT1806IS8#PBF?
The LT1806IS8#PBF is specified and guaranteed over the industrial temperature range of –40°C to +85°C, as indicated by the "I" grade suffix in the part number. This rating applies to all electrical parameters in the datasheet's "–40°C < TA < 85°C" column, including gain-bandwidth, slew rate, and input offset voltage.
Does the LT1806IS8#PBF support true rail-to-rail input and output operation?
Yes, the LT1806IS8#PBF supports rail-to-rail input common-mode range (from V– to V+) and rail-to-rail output swing (within 20mV of either rail under load). This is confirmed in the datasheet's "Input Common Mode Range" and "Output Voltage Swing" specifications, enabling full dynamic range utilization in low-voltage 3V or single-supply systems.
What is the purpose of Pin 5 (SHDN) on the LT1806IS8#PBF?
Pin 5 is the active-low shutdown control input. Driving SHDN < 0.3V disables the amplifier, reducing supply current to 0.4mA (typical at 5V), while the output enters high-impedance state. Pulling SHDN > V+–0.5V enables normal operation. Turn-on and turn-off times are 80ns and 50ns respectively, supporting rapid power cycling in portable devices.
Can the LT1806IS8#PBF drive a 50Ω load effectively?
Yes, the LT1806IS8#PBF delivers ±85mA output current and is characterized driving 50Ω loads. At ±5V supplies, it sustains 4VP-P output into 50Ω with <0.1% distortion, and its 140V/μs slew rate prevents slew-induced distortion. Layout best practice recommends series output resistance (e.g., 10–20Ω) to dampen capacitive-load peaking per Figure 31–32 in the datasheet.
How does the LT1806IS8#PBF compare to the dual LT1807IS8#PBF in terms of pin compatibility?
The LT1806IS8#PBF (single) and LT1807IS8#PBF (dual) share identical 8-pin SO packaging and pin 1–4 / 6–8 assignments, but differ critically at Pins 5 and 7: LT1806 uses Pin 5 for SHDN and Pin 7 as NC, whereas LT1807 uses Pin 5 for OUT B and Pin 7 for –IN B. Thus, they are not pin-compatible; board redesign is required for substitution.
LT1806IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 140V/µs
- Gain Bandwidth Product:
- 325 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 11mA
- Current - Output / Channel:
- -
- 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
LT1806IS8#PBF FAQ
1.How can I place an order for LT1806IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1806IS8#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 LT1806IS8#PBF reliable?
The price and inventory of LT1806IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1806IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1806IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1806IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1806IS8#PBF?
LT1806IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1806IS8#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 LT1806IS8#PBF?
For technical support, including LT1806IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1806IS8#PBF requirements.
6.How does Aetrix verify that LT1806IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1806IS8#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 LT1806IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1806IS8#PBF?
All LT1806IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1806IS8#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 LT1806IS8#PBF part is unused and in its original packaging.
Return procedure for LT1806IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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