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Analog Devices Inc. LT1208CS8#TRPBF
- Part No.:
- LT1208CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1208CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,114
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Product details
Overview
LT1208CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual, high-speed voltage-feedback operational amplifier optimized for wideband signal conditioning in precision data acquisition and video systems. It delivers 45MHz gain-bandwidth, 400V/µs slew rate, ±12V output swing into 500Ω with ±15V supplies, unity-gain stability, and 3mV max input offset voltage - enabling fast settling (90ns to 0.1%) in ADC driver and cable driver applications.
For engineers reviewing the LT1208CS8#TRPBF datasheet, LT1208CS8#TRPBF pinout, LT1208CS8#TRPBF application, or LT1208CS8#TRPBF equivalent, key selection criteria include its bipolar complementary process architecture, SOIC-8 package thermal resistance (θJA = 150°C/W), capacitive-load drive capability, and performance trade-offs between ±5V and ±15V supply operation.
Technical Context
The LT1208CS8#TRPBF employs a single-stage bipolar complementary design delivering high DC gain (7V/mV at RL = 500Ω) and low input bias current (4–9µA) while maintaining 45MHz GBW and 400V/µs slew rate. Its internal compensation ensures unity-gain stability without external components, and its output stage drives both resistive (500Ω) and large capacitive loads directly.
It features rail-to-rail input common-mode range (±12V with ±15V supplies), 98dB typical CMRR, 84dB PSRR, and low noise (22nV/√Hz at 10kHz). The device operates across ±2.5V to ±15V supplies, with specified performance over –40°C to 85°C ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz at ±15V - enables stable closed-loop operation up to ~430kHz in instrumentation amplifier configurations (TA03). |
| Slew Rate | 400V/µs at ±15V - supports full-scale 10V step settling in ≤90ns (0.1%), critical for DAC current-to-voltage conversion (TA04). |
| Input Offset Voltage | Max 3mV at ±15V, 25°C - ensures <40mV error (1LSB) in 10-bit DAC interfaces with 5kΩ feedback resistor. |
| Output Swing | ±12V into 500Ω with ±15V supplies - delivers full dynamic range for ±10V data acquisition front-ends. |
| Supply Range | ±2.5V to ±15V - allows low-voltage operation (e.g., ±2.5V yields 2VP-P sine fidelity at 5MHz) and high-swing industrial use. |
| Capacitive Load Drive | Stable with ≥10,000pF - eliminates need for isolation resistors in coaxial cable drivers (TA06) and active filter buffers. |
| Input Noise | 22nV/√Hz at 10kHz - maintains SNR integrity in wideband preamplifier stages before ADC sampling. |
Pinout & Package
LT1208CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package with standard JEDEC MS-012AC dimensions (3.9mm × 4.9mm × 1.5mm), gull-wing leads, and θJA = 150°C/W. Pin 1 is marked with a dot or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Low-impedance, high-current source/sink node capable of ±24mA into 500Ω load. |
| 2 (–IN A) | Inverting input A | Differential input terminal; requires balanced source impedance for optimal DC accuracy and CMRR. |
| 3 (+IN A) | Non-inverting input A | Differential input terminal; common-mode range extends to ±12V with ±15V supplies. |
| 4 (V–) | Negative supply rail | Return path for internal biasing; must be decoupled with 0.01–0.1µF ceramic capacitor near pin. |
| 5 (V+) | Positive supply rail | Power input for internal circuitry; requires low-ESR 1–10µF tantalum bypass for high-current transients. |
| 6 (OUT B) | Amplifier B output | Independent output stage; crosstalk to OUT A is –94dB at ±10V swing, enabling dual-channel isolation. |
| 7 (–IN B) | Inverting input B | Second differential pair input; layout symmetry with Pins 2–3 recommended to minimize inter-channel mismatch. |
| 8 (+IN B) | Non-inverting input B | Second differential pair input; shares same input resistance (20–40MΩ) and capacitance (2pF) as Pin 3. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | No external compensation required - simplifies PCB layout for gain-of-1 buffer and video line drivers (TA06). |
| Capacitive load tolerance | Drives ≥10,000pF without oscillation - enables direct connection to coaxial cables and LCD panel traces without series termination. |
| Fast settling time | 90ns to 0.1% for 10V step - meets timing budgets in 10 MSPS data acquisition systems with 12-bit resolution. |
| Wide supply flexibility | Operates from ±2.5V to ±15V - supports portable (±2.5V) and industrial (±15V) rails within same footprint and BOM. |
| High DC precision | 7V/mV open-loop gain and 3mV VOS max - preserves linearity in precision inverting amplifiers and active filter transfer functions (TA01–TA02). |
Applications
| Instrumentation Amplifier Front-End | Cable Driver for Video Signals |
|---|---|
Use Scenario: High-common-mode rejection signal conditioning for strain gauge or thermocouple sensors in noisy industrial environments. IC Role / Device Role / Timing Role: Dual op-amp configured as 3-op-amp instrumentation amplifier (TA03), providing gain of 102 with trimmable CMRR. Use Value: Delivers 430kHz bandwidth and <1mV VOS drift over temperature - enabling sub-0.1% measurement accuracy without recalibration. |
Use Scenario: Driving 75Ω coaxial video cables in broadcast equipment or medical imaging displays. IC Role / Device Role / Timing Role: Unity-gain buffer (TA06) with double-terminated 75Ω output, preserving pulse fidelity for NTSC/PAL signals. Use Value: Maintains <1.3% differential gain error and <1.8° phase error at 3.58MHz - meeting SMPTE 259M analog video standards. |
| DAC Current-to-Voltage Conversion | Active Filter for Data Acquisition |
Use Scenario: Converting 2mA full-scale current output from DAC-08 family converters into precise 10V analog voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier with 5kΩ feedback and 7pF compensation (TA04), rejecting DAC output capacitance pole. Use Value: Achieves <140ns 1LSB (40mV) settling for 10V step - supporting >7 MSPS effective sampling rates in closed-loop control systems. |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filters prior to SAR ADCs in test equipment. IC Role / Device Role / Timing Role: Dual-amplifier topology (TA01–TA02) realizing 1MHz cutoff with minimal passband ripple and group delay variation. Use Value: Provides 98dB stopband attenuation at 2× cutoff while maintaining <0.09% differential gain distortion - ensuring ENOB >11 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8001ARZ | Single-channel, 800MHz GBW, 1200V/µs slew rate, but higher 3.5mV VOS and no guaranteed unity-gain stability. | Requires external compensation for G=1; better suited for RF gain blocks than precision DAC buffers. | Select AD8001ARZ only when >500MHz bandwidth is mandatory and DC precision is secondary. |
| OPA2691U | Dual-channel, 320MHz GBW, 1800V/µs slew rate, 5mV VOS max, and unity-gain stable - but consumes 12.5mA per amp vs. 9mA for LT1208CS8#TRPBF. | Higher power dissipation limits use in thermally constrained SOIC-8 layouts; superior for >100MHz video distribution. | Choose OPA2691U when driving multiple 75Ω lines simultaneously and thermal headroom permits extra 3.5mA/amp. |
Compared with AD8001ARZ and OPA2691U, the LT1208CS8#TRPBF offers the best balance of 45MHz bandwidth, 3mV VOS, unity-gain stability, and SOIC-8 thermal efficiency - making it optimal for cost-sensitive, space-constrained data acquisition front-ends where precision settling dominates over raw speed.
Availability
LT1208CS8#TRPBF is available at Aetrix Electronics and suitable for data acquisition systems, video signal conditioning, and precision DAC interface circuits requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1208CS8#TRPBF 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, headquartered in Wilmington, MA.
The LT1208CS8#TRPBF belongs to Linear Technology's legacy high-speed op-amp family designed specifically for demanding signal chain applications - including data acquisition, video, and instrumentation - where simultaneous bandwidth, DC accuracy, and capacitive-load drive are essential.
FAQ
What is the maximum capacitive load the LT1208CS8#TRPBF can drive without instability?
The LT1208CS8#TRPBF is characterized as stable with ≥10,000pF capacitive loads under standard test conditions (TA02, TA06). At 10,000pF, large-signal response shows slew-rate limiting but no oscillation. For optimal pulse fidelity with coaxial cables, a 75Ω series resistor is recommended per TA06. The device achieves this via internal compensation that senses load-induced poles and adjusts gain-node dynamics accordingly.
Does the LT1208CS8#TRPBF support single-supply operation?
The LT1208CS8#TRPBF is specified for dual-supply operation (±2.5V to ±15V) and does not support true single-supply use. Its input common-mode range extends to ±12V with ±15V supplies but does not include the negative rail - meaning it cannot accept inputs near V– in single-ended configurations. For single-supply designs, rail-to-rail input/output op-amps like the ADA4891-2 are more appropriate.
What is the thermal resistance (θJA) of the LT1208CS8#TRPBF in its SOIC-8 package?
The LT1208CS8#TRPBF in the S8 (SOIC-8) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as documented in the Absolute Maximum Ratings table on page 2 of the datasheet. This value assumes standard JEDEC 2-layer board conditions (1 inch² copper pad per power pin); actual θJA improves with enhanced PCB copper area or thermal vias.
Can the LT1208CS8#TRPBF replace the LT1208CN8 in existing designs?
Yes, the LT1208CS8#TRPBF is a direct functional replacement for the LT1208CN8 (8-lead DIP), sharing identical electrical specifications, pinout, and operating temperature range (–40°C to 85°C). However, the SOIC-8 package has higher θJA (150°C/W vs. 100°C/W for DIP), so thermal validation is required in high-power-density layouts. No PCB changes are needed beyond footprint adaptation.
What is the small-signal settling time specification for the LT1208CS8#TRPBF?
The LT1208CS8#TRPBF achieves 90ns settling time to 0.1% for a 10V output step under ±15V supplies, as specified in the Electrical Characteristics table (page 3). This is measured in unity-gain configuration with RL = 500Ω and reflects the combined effect of 45MHz GBW, 400V/µs slew rate, and low overshoot (<30%). At ±5V supplies, settling degrades to 125ns due to reduced slew rate (250V/µs typ).
LT1208CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 7mA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1208CS8#TRPBF FAQ
1.How can I place an order for LT1208CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1208CS8#TRPBF 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 LT1208CS8#TRPBF reliable?
The price and inventory of LT1208CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1208CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1208CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1208CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1208CS8#TRPBF?
LT1208CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1208CS8#TRPBF 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 LT1208CS8#TRPBF?
For technical support, including LT1208CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1208CS8#TRPBF requirements.
6.How does Aetrix verify that LT1208CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1208CS8#TRPBF 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 LT1208CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1208CS8#TRPBF?
All LT1208CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1208CS8#TRPBF, 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 LT1208CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1208CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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