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Analog Devices Inc. LT1468CS8#TRPBF
- Part No.:
- LT1468CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1468CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,739
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Product details
Overview
LT1468CS8#TRPBF from Analog Devices (formerly Linear Technology) is a precision high-speed operational amplifier optimized for 16-bit data acquisition systems, delivering 90 MHz gain bandwidth, 22 V/µs slew rate, and 900 ns settling to 150 µV for 10 V steps. Its low input offset voltage (max 75 µV), 2 µV/°C drift, and balanced noise performance (5 nV/√Hz, 0.6 pA/√Hz) make it ideal for DAC current-to-voltage conversion and ADC buffering in ±5 V or ±15 V supplies.
For engineers reviewing the LT1468CS8#TRPBF datasheet, LT1468CS8#TRPBF pinout, LT1468CS8#TRPBF application, or LT1468CS8#TRPBF equivalent, key selection criteria include guaranteed 0°C to 70°C operation in SO-8 package, unity-gain stability, DC accuracy with <1 LSB error in 16-bit DAC I-to-V designs, and low distortion (–96.5 dB THD at 100 kHz).
Technical Context
The LT1468CS8#TRPBF employs a complementary bipolar process to achieve simultaneous high DC precision and wideband AC performance. Its input stage features bias current cancellation tailored for inverting configurations, with trimmed inverting input bias current (±10 nA max) and untrimmed noninverting input (±40 nA max), enabling optimal accuracy in DAC I-to-V converters where source resistance matching would degrade performance.
It delivers full 16-bit AC/DC fidelity in noninverting ADC buffer applications via high open-loop gain (>1000 V/mV into 2 kΩ), low distortion (–96.5 dB THD at 100 kHz, 10 VP-P), and rail-to-rail output swing (±12.8 V into 2 kΩ at ±15 V). The 90 MHz GBW ensures minimal gain roll-off up to 100 kHz, preserving signal integrity in high-resolution sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 90 MHz at ±15 V - maintains >60 dB loop gain at 100 kHz for low distortion in precision signal chains. |
| Slew Rate | 22 V/µs at ±15 V - enables clean large-signal response in active filters and instrumentation amplifiers without slewing-induced distortion. |
| Settling Time | 900 ns to 150 µV for 10 V step (AV = –1) - supports 16-bit settling in high-speed DAC output conditioning. |
| Input Offset Voltage | Max 75 µV at ±15 V - ensures <1 LSB error in 16-bit (65,536-step) systems with 10 V full-scale range. |
| Input Noise | 5 nV/√Hz voltage noise + 0.6 pA/√Hz current noise - optimized total noise for source resistances between 1 kΩ and 20 kΩ. |
| DC Open-Loop Gain | Min 1000 V/mV into 2 kΩ - provides >100 dB loop gain at DC for ultra-low gain error in precision buffers. |
| Output Swing | ±12.8 V into 2 kΩ at ±15 V - delivers >95% of rail-to-rail dynamic range for maximum SNR in analog front-ends. |
Pinout & Package
LT1468CS8#TRPBF is housed in an 8-lead plastic small outline (SO-8, narrow 0.150") package with standard JEDEC MS-012AC footprint and RoHS-compliant lead-free finish. Thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | Offset Null Terminal | Factory-trimmed node for inverting input bias current; no external connection required. |
| 2 (–IN) | Inverting Input | Differential input with trimmed bias current (±10 nA max); primary node for I-to-V conversion. |
| 3 (+IN) | Noninverting Input | Input with untrimmed bias current (±40 nA max); used for reference or feedback sensing. |
| 4 (V–) | Negative Supply | Connects to negative rail (e.g., –5 V or –15 V); exposed pad internally tied to V– in DFN variants (not applicable here). |
| 5 (DNC*) | No-Connect | Do not connect; internal factory test node with no functional role in circuit operation. |
| 6 (V+) | Positive Supply | Connects to positive rail (e.g., +5 V or +15 V); decoupling critical for stability and noise performance. |
| 7 (OUT) | Output | Capable of driving ≥±12.8 V into 2 kΩ; stable with capacitive loads up to 100 pF in unity gain. |
| 8 (NULL) | Offset Null Terminal | Second factory-trimmed node; left unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| 16-Bit Settling Performance | 900 ns to 150 µV ensures full resolution in high-speed DAC output stages without post-conversion filtering delay. |
| Low Distortion Architecture | –96.5 dB THD at 100 kHz, 10 VP-P enables clean signal reconstruction in bandpass filter and spectrum analyzer front-ends. |
| Bias Current Optimized Inputs | Inverting input bias current trimmed to ±10 nA maximizes DC accuracy in current-input applications like photodiode amps and DAC I-to-V. |
| Unity-Gain Stable Operation | Guaranteed stability at AV = 1 eliminates need for external compensation in buffer and follower configurations. |
| Wide Supply Range Support | Specified for ±5 V and ±15 V operation - simplifies integration into legacy industrial and test equipment power domains. |
Applications
| 16-Bit DAC Current-to-Voltage Converter | Precision Instrumentation Amplifier |
|---|---|
Use Scenario: Converting output current from a 16-bit multiplying DAC (e.g., LTC1597) into a precise voltage for analog processing or control. IC Role / Device Role / Timing Role: Primary I-to-V converter with matched feedback network; settles in 900 ns to 150 µV ensuring <1 LSB error at 16-bit resolution. Use Value: Eliminates need for post-DAC zero-delay calibration by guaranteeing initial offset <75 µV and drift <2 µV/°C over 0°C–70°C. | Use Scenario: Building a high-accuracy, low-drift instrumentation amplifier front-end for sensor signal conditioning in medical or industrial measurement. IC Role / Device Role / Timing Role: Core gain stage in three-op-amp IA topology; provides high CMRR (110 dB) and low noise for microvolt-level differential signals. Use Value: Enables 16-bit effective resolution in bridge-based strain gauge or RTD interfaces without external auto-zero circuitry. |
| ADC Buffer for 16-Bit Sampling | Low-Distortion Active Filter |
Use Scenario: Driving the sample-and-hold input of a 16-bit SAR ADC (e.g., LTC1605) while isolating high-impedance signal sources. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer; maintains DC accuracy and delivers full 16-bit AC performance up to 100 kHz. Use Value: Prevents aperture uncertainty and gain error by providing >1000 V/mV open-loop gain and ±12.8 V output swing into 2 kΩ. | Use Scenario: Implementing a 100 kHz bandpass filter for signal generator cleanup or communications channel equalization. IC Role / Device Role / Timing Role: High-fidelity gain stage in multiple-feedback or state-variable topology; operates at AV = 2 with –96.5 dB THD. Use Value: Preserves spectral purity in test equipment by limiting harmonic distortion to <0.0015% at 100 kHz, 10 VP-P. |
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 |
|---|---|---|---|
| LT1469CS8#TRPBF | Dual-channel version with identical specs per amplifier; higher supply current (6.5 mA/channel vs 5.2 mA). | Required when two independent 16-bit signal paths are needed (e.g., stereo audio, dual-channel DAQ); same PCB layout not possible due to different pinout. | Select LT1469CS8#TRPBF only when dual amplification is required; otherwise LT1468CS8#TRPBF offers lower cost and board area. |
| LTC6090CS8#TRPBF | Higher supply voltage range (±13.5 V max), lower input bias current (±2 pA), but slower GBW (27 MHz) and higher VOS (250 µV max). | Better suited for high-voltage, ultra-low-input-current applications (e.g., piezoelectric sensors); insufficient speed for 100 kHz 16-bit THD-critical use cases. | Choose LTC6090CS8#TRPBF for >±10 V signal chains requiring femtoampere input leakage; avoid for DAC I-to-V or ADC buffer where 90 MHz GBW is mandatory. |
Compared with LT1469CS8#TRPBF and LTC6090CS8#TRPBF, the LT1468CS8#TRPBF uniquely balances 16-bit settling time, 90 MHz bandwidth, and sub-100 µV offset in a single-channel SO-8 package-making it the only choice for space-constrained, high-fidelity 16-bit data acquisition nodes requiring guaranteed 0°C to 70°C performance.
Availability
LT1468CS8#TRPBF is available at Aetrix Electronics and suitable for high-accuracy data acquisition systems, precision instrumentation front-ends, and 16-bit DAC/ADC interface circuits requiring stable component supply across industrial, test & measurement, and medical OEM programs.
Supply support for LT1468CS8#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 for precision measurement and signal conditioning.
The LT1468CS8#TRPBF belongs to Linear Technology's precision high-speed op amp product line, engineered specifically to resolve the historical trade-off between DC accuracy and AC bandwidth in 16-bit data conversion systems.
FAQ
What is the maximum operating temperature range for the LT1468CS8#TRPBF?
The LT1468CS8#TRPBF is specified for operation from 0°C to 70°C. This commercial-grade temperature range is explicitly defined in the Order Information table of the datasheet and applies to all electrical characteristics unless otherwise noted. It is distinct from the extended –40°C to 85°C grade offered in LT1468IS8#TRPBF variants.
Does the LT1468CS8#TRPBF require external nulling components?
No, the LT1468CS8#TRPBF does not require external nulling components. Pins 1 and 8 are factory-trimmed NULL terminals for inverting input bias current cancellation and must remain unconnected in all designs. The device achieves its 75 µV max input offset voltage without user adjustment.
Can the LT1468CS8#TRPBF drive capacitive loads without instability?
Yes, the LT1468CS8#TRPBF is stable driving up to 100 pF in unity-gain configuration and up to 300 pF in inverting gain-of–1 configuration. For larger loads, a small series resistor (e.g., 10–50 Ω) between output and load plus a feedback capacitor (CF ≥ CIN) restores phase margin per Application Note AI04 guidelines.
What is the supply current consumption of the LT1468CS8#TRPBF at ±15 V?
At ±15 V supply, the LT1468CS8#TRPBF draws a typical supply current of 5.2 mA, with a maximum of 6.5 mA over temperature. This value is confirmed in the Electrical Characteristics tables on pages 4 and 5 of the datasheet under "IS Supply Current" for the S8 package at ±15 V.
Is the LT1468CS8#TRPBF pin-compatible with other SO-8 op amps?
No, the LT1468CS8#TRPBF has a unique pinout: Pin 5 is DNC (do-not-connect), and Pins 1 and 8 are NULL terminals-not standard op amp inputs or power pins. Substituting it for generic SO-8 op amps (e.g., OP27, AD827) will cause functional failure due to misrouted signals and unconnected bias nodes.
LT1468CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 22V/µs
- Gain Bandwidth Product:
- 90 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 3.9mA
- Current - Output / Channel:
- 22 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1468CS8#TRPBF FAQ
1.How can I place an order for LT1468CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1468CS8#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 LT1468CS8#TRPBF reliable?
The price and inventory of LT1468CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1468CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1468CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1468CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1468CS8#TRPBF?
LT1468CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1468CS8#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 LT1468CS8#TRPBF?
For technical support, including LT1468CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1468CS8#TRPBF requirements.
6.How does Aetrix verify that LT1468CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1468CS8#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 LT1468CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1468CS8#TRPBF?
All LT1468CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1468CS8#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 LT1468CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1468CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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