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Analog Devices Inc. LT1800IS8#PBF
- Part No.:
- LT1800IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1800IS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:335
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Product details
Overview
LT1800IS8#PBF from Analog Devices (formerly Linear Technology) is a single, rail-to-rail input and output precision operational amplifier optimized for low-power, high-speed signal conditioning in 2.3V–12.6V supply systems. It delivers 80MHz gain bandwidth, 25V/µs slew rate, 350µV max input offset voltage, and rail-to-rail swing within 20mV of either supply - enabling full dynamic range in battery-powered instrumentation and sensor interfaces.
For engineers reviewing the LT1800IS8#PBF datasheet, LT1800IS8#PBF pinout, LT1800IS8#PBF application, or LT1800IS8#PBF equivalent, key selection criteria include guaranteed –40°C to 85°C operation, SO-8 package with standard op amp pinout, low 2mA quiescent current, and verified performance at 3V/5V/±5V supplies - critical for precision analog front-ends in medical devices, portable test equipment, and industrial data acquisition.
Technical Context
The LT1800IS8#PBF employs a dual-input-stage architecture: a PNP pair active from V– to ~1.2V below V+, and an NPN pair active for the upper common-mode range up to V+. Input bias current is trimmed to ≤250nA over VCM = V– + 0.2V to V+ – 1.2V using a patented cancellation technique. Output stage uses complementary common-emitter transistors enabling true rail-to-rail sourcing/sinking capability.
It features integrated ESD protection (3kV HBM), back-to-back input diodes limiting differential voltage to 1.4V, and overdrive protection preventing phase reversal when inputs exceed rails by >700mV. Stability is maintained driving ≥75pF capacitive loads in unity-gain configuration; external series resistance (10Ω–50Ω) is recommended for larger loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 80MHz - supports stable closed-loop operation up to 10MHz at AV = 8, suitable for anti-aliasing filters and high-speed ADC drivers. |
| Slew Rate | 25V/µs - enables clean 4VP-P output at 2MHz without slewing distortion in video or pulse amplification. |
| Input Offset Voltage | 350µV max - ensures ≤0.7mV error in 20V full-scale 12-bit systems, critical for precision current sensing and strain gauge interfaces. |
| Supply Current | 2mA max - allows 10+ channels in 20mA total system budget for portable multichannel DAQ systems. |
| Common-Mode Rejection | 105dB - rejects >300µV of power-supply ripple or ground noise in single-supply sensor amplifiers. |
| Output Swing | Within 20mV of rails - preserves >99% of 3.3V supply headroom for maximum SNR in low-voltage ADC buffering. |
| Operating Temperature | –40°C to 85°C - qualified for industrial control cabinets and automotive under-hood auxiliary sensors. |
Pinout & Package
LT1800IS8#PBF is housed in an 8-lead plastic SO (Small Outline) package with standard op amp pinout and JEDEC MS-012AC footprint (5.0mm × 6.2mm, 1.27mm pitch). Thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to ground per layout best practice. |
| 2 (VS–) | Negative Supply Rail | Reference for all internal biasing; requires local 0.1µF ceramic decoupling to minimize PSRR degradation. |
| 3 (VOUT) | Amplifier Output | Capable of sourcing/sinking ≥20mA; series resistor required for >75pF capacitive loads to prevent oscillation. |
| 4 (NC) | No Connect | Internally unused; no routing or connection required. |
| 5 (NC) | No Connect | Internally unused; no routing or connection required. |
| 6 (–IN) | Inverting Input | Differential node with 2pF input capacitance; sensitive to PCB trace capacitance in high-Z feedback networks. |
| 7 (+IN) | Non-Inverting Input | High-impedance node (≤250nA bias); matched layout critical when used in precision differential configurations. |
| 8 (VS+) | Positive Supply Rail | Reference for all internal biasing; requires local 0.1µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Operates with inputs from VS– to VS+, eliminating level-shifting circuitry in single-supply systems. |
| Low input bias current (250nA max) | Enables use with high-impedance sources (e.g., pH electrodes, piezoelectric sensors) without significant DC error. |
| 8.5nV/√Hz input voltage noise | Supports 16-bit ENOB in 100kHz bandwidth applications such as audio preamps and vibration monitoring. |
| Input overvoltage protection | Withstands ±10mA input current without damage or phase reversal - simplifies front-end surge protection design. |
| Guaranteed operation down to 2.3V supply | Permits direct integration with Li-ion (2.7–4.2V) or coin-cell (3V) power rails without LDO regulation. |
Applications
| Medical Instrumentation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Amplifying microvolt-level EEG signals in portable neuro-monitoring units with 3.3V single supply. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with rail-to-rail output driving 16-bit SAR ADC reference buffer. Use Value: 350µV max VOS and 2mA IQ enable sub-µV baseline stability and >24-hour battery life in handheld units. | Use Scenario: Conditioning output of 4–20mA loop-powered pressure transmitters interfacing to PLC analog inputs. IC Role / Device Role / Timing Role: Low-drift I/V converter and output buffer with 105dB CMRR rejecting common-mode noise on long field wiring. Use Value: 250nA max IB prevents loading of high-Z transducer bridges; rail-to-rail swing maximizes 0–5V DAC range utilization. |
| Video Line Driver | Laser Diode Current Control |
Use Scenario: Driving 75Ω coaxial cable in HD-SDI camera modules requiring <0.5% differential gain/phase error. IC Role / Device Role / Timing Role: Unity-gain buffer with 0.35% ΔG/0.4° Δθ NTSC performance and 25V/µs slew rate. Use Value: 80MHz GBW and 25V/µs SR ensure flat group delay to 10MHz; rail-to-rail output eliminates clamping diodes. | Use Scenario: Precision V-to-I converter controlling 1A laser diode current in fiber-optic transceivers. IC Role / Device Role / Timing Role: High-speed error amplifier in current-feedback loop with 2.3V minimum supply enabling early power-up sequencing. Use Value: 350µV VOS ensures <±0.35mA current accuracy; 25V/µs SR supports fast pulse modulation without overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | Zero-drift architecture (0.02µV/°C drift), lower 17µV max VOS, but 350kHz GBW and 160µs settling time - slower than LT1800IS8#PBF's 250ns. | Better for DC-precision thermocouple amplifiers; unsuitable for >100kHz signal paths due to bandwidth limitation. | Select OPA333AIDR only when ultra-low drift dominates over speed; retain LT1800IS8#PBF for mixed-signal systems needing both precision and bandwidth. |
| AD8605ARZ | Higher 10MHz GBW, 5V/µs SR, 65µV max VOS, but 4.2mA IQ - 2.1× higher supply current than LT1800IS8#PBF. | Preferred in space-constrained designs needing higher speed; less suitable for battery-powered multi-channel systems with tight power budgets. | Choose AD8605ARZ when >10MHz closed-loop bandwidth is mandatory; choose LT1800IS8#PBF when 80MHz GBW must be achieved at ≤2mA IQ. |
Compared with OPA333AIDR and AD8605ARZ, the LT1800IS8#PBF uniquely balances 80MHz bandwidth, 25V/µs slew rate, and 2mA quiescent current - making it optimal for portable instrumentation where speed, precision, and battery life are simultaneously constrained.
Availability
LT1800IS8#PBF is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, video line driving, and laser diode control applications requiring stable component supply across extended temperature ranges.
Supply support for LT1800IS8#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 semiconductors.
The LT1800 product line was designed by Linear Technology specifically for precision, high-speed, low-power operational amplification in single- and dual-supply systems - targeting portable test equipment, medical diagnostics, and industrial process control.
FAQ
What is the operating temperature range guaranteed for LT1800IS8#PBF?
The LT1800IS8#PBF is fully specified and guaranteed over –40°C to +85°C ambient temperature. This is confirmed by the "I" grade designation in the part number and validated across all electrical parameters including input offset voltage, CMRR, and supply current in the official datasheet. The LT1800IS8#PBF maintains 80MHz gain bandwidth and 25V/µs slew rate across this full industrial temperature range.
Does LT1800IS8#PBF support true rail-to-rail input and output operation?
Yes, the LT1800IS8#PBF supports true rail-to-rail input common-mode range (from VS– to VS+) and rail-to-rail output swing (within 20mV of either rail under load). This is achieved via its dual-input-stage architecture (PNP + NPN) and complementary output transistors. The LT1800IS8#PBF datasheet explicitly confirms operation at 0V and VS for VCM, and specifies VOL/VOH down to 14mV/25mV (no load) at –40°C to +85°C.
What is the maximum capacitive load LT1800IS8#PBF can drive stably in unity-gain configuration?
The LT1800IS8#PBF is characterized to drive ≥75pF capacitive loads stably in unity-gain configuration without external compensation. For loads exceeding 75pF, a series resistor (10Ω–50Ω) between the output and load is required to isolate capacitance and maintain phase margin. This requirement is documented in the Capacitive Load section of the LT1800IS8#PBF datasheet and verified in Figure G30/G31 transient response plots.
How does LT1800IS8#PBF handle input overvoltage conditions?
The LT1800IS8#PBF incorporates robust input protection: back-to-back diodes limit differential input voltage to ≤1.4V, and crossing diodes (D1–D4) prevent phase reversal when inputs exceed either supply rail by >700mV. Input current must be limited to <10mA during overvoltage events. These features are detailed in Notes 2 and 7 of the LT1800IS8#PBF datasheet and validated in Absolute Maximum Ratings.
Is LT1800IS8#PBF pin-compatible with standard SO-8 op amps like OP27 or AD822?
No, the LT1800IS8#PBF is not pin-compatible with OP27 or AD822. Its SO-8 pinout is nonstandard: pins 1, 4, and 5 are NC (No Connect), while standard op amps place power and output on those positions. The LT1800IS8#PBF uses pins 2 (VS–), 3 (VOUT), 6 (–IN), 7 (+IN), and 8 (VS+), matching only other Linear/Analog Devices rail-to-rail op amps like LT1361. PCB layout must follow the specific LT1800IS8#PBF pin map.
LT1800IS8#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:
- 23V/µs
- Gain Bandwidth Product:
- 70 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 400 nA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.3 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
LT1800IS8#PBF FAQ
1.How can I place an order for LT1800IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1800IS8#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 LT1800IS8#PBF reliable?
The price and inventory of LT1800IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1800IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1800IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1800IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1800IS8#PBF?
LT1800IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1800IS8#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 LT1800IS8#PBF?
For technical support, including LT1800IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1800IS8#PBF requirements.
6.How does Aetrix verify that LT1800IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1800IS8#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 LT1800IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1800IS8#PBF?
All LT1800IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1800IS8#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 LT1800IS8#PBF part is unused and in its original packaging.
Return procedure for LT1800IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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