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Analog Devices Inc. LT1468IS8-2#PBF
- Part No.:
- LT1468IS8-2#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1468IS8-2#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LT1468IS8-2#PBF from Analog Devices (formerly Linear Technology) is a decompensated precision high-speed operational amplifier optimized for gain ≥ 2 configurations, delivering 200MHz gain bandwidth, 30V/µs slew rate, and ≤75µV max input offset voltage over –40°C to 85°C. It enables 16-bit DC and AC accuracy in DAC current-to-voltage conversion and ADC buffer circuits with 800ns settling to 150µV.
For engineers reviewing the LT1468IS8-2#PBF datasheet, LT1468IS8-2#PBF pinout, LT1468IS8-2#PBF application, or LT1468IS8-2#PBF equivalent, this page provides verified package mapping, temperature-grade-specific electrical limits, noise-optimized bias current cancellation, and validated stability conditions for AV = –1 and AV = 2 configurations.
Technical Context
The LT1468IS8-2#PBF uses a decompensated two-stage transconductance amplifier architecture with factory-trimmed inverting input bias current (IB– ≤ ±10nA), enabling stable operation only at closed-loop gains ≥ 2. Its input stage integrates 100Ω series resistors and back-to-back diodes for ±10mA input fault protection.
DC performance is tailored for inverting applications: input offset voltage drift is specified at ≤2µV/°C, common-mode rejection ratio reaches 110dB at ±12.5V CM input, and total input noise is minimized for source impedances between 1kΩ and 20kΩ via matched voltage/current noise density (5nV/√Hz, 0.6pA/√Hz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 200MHz at ±15V - ensures ≥80dB open-loop gain at 100kHz for distortion suppression in 16-bit data acquisition |
| Slew Rate | 30V/µs at ±15V - supports full-scale 10V step response within 800ns to 150µV error in AV = –1 DAC I-to-V converters |
| Input Offset Voltage | ≤75µV max at ±15V, –40°C to 85°C - guarantees <1 LSB error in 16-bit systems with 10V full-scale range |
| Inverting Input Bias Current | ≤±10nA at ±15V - enables accurate low-current sensing in photodiode amplifiers without external compensation |
| Settling Time | 800ns to 150µV for 10V step, AV = –1 - meets timing requirements for 1 MSPS 16-bit ADC buffering |
| Output Swing | ±12.8V into 2kΩ at ±15V - delivers rail-to-rail usable dynamic range for ±12V signal chains |
| Input Noise Density | 5nV/√Hz voltage noise + 0.6pA/√Hz current noise - optimized for 1k–20kΩ source impedances in precision transimpedance designs |
Pinout & Package
LT1468IS8-2#PBF is housed in an 8-lead plastic SOIC (S8) package with 0.150-inch body width, JEDEC MS-012 compliant, rated for –40°C to 85°C operation. Exposed pad is not present; thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | Inverting input nulling terminal | Factory-trim connection for IB– cancellation; must remain unconnected in circuit |
| 2 (–IN) | Inverting input | High-impedance node with ≤±10nA bias current; protected by 100Ω series resistor and clamp diodes |
| 3 (+IN) | Noninverting input | Untrimmed input with wider bias current variation; requires guard ring for microvolt-level accuracy |
| 4 (V–) | Negative supply | Supports ±5V or ±15V dual supplies; internal ESD clamps connect inputs to V– |
| 5 (DNC*) | Do-not-connect terminal | No internal connection; left floating per datasheet - not used for trimming or function |
| 6 (V+) | Positive supply | Accepts up to ±15V total supply; input common-mode range extends to within 0.5V of V+ |
| 7 (OUT) | Amplifier output | Capable of ±12.8V swing into 2kΩ; short-circuit current limited to ±12mA at ±15V |
| 8 (NULL) | Inverting input current trim | Factory-connected during test; must remain unconnected - no user access or routing |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated stability | Guaranteed stable only at closed-loop gain ≥ 2 - enables 200MHz GBW vs 90MHz in unity-gain variants |
| Inverting input bias current trim | Factory-adjusted IB– ≤ ±10nA at 0V common mode - reduces offset error in I-to-V DAC interfaces |
| Total input noise optimization | 5nV/√Hz + 0.6pA/√Hz balanced for 1k–20kΩ sources - minimizes integrated noise in photodiode amps |
| Input protection architecture | 100Ω series resistors + back-to-back diodes on both inputs - withstands ±10mA transient currents |
| Wide supply range operation | Specified at ±5V and ±15V - supports legacy industrial ±12V and modern low-voltage ±5V signal chains |
Applications
| 16-Bit DAC I-to-V Converter | Precision Instrumentation Amplifier Front-End |
|---|---|
|
Use Scenario: Converting 16-bit current-output DAC (e.g., LTC1597) into precise voltage output with minimal glitch-induced error. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with gain = –1, leveraging factory-trimmed IB– to maintain <1 LSB accuracy at 10V FS. Use Value: 800ns settling to 150µV eliminates hold-time bottlenecks in 1 MSPS DAC update cycles while maintaining DC linearity. |
Use Scenario: Low-noise, high-CMRR front-end for strain gauge or bridge sensor conditioning in industrial weigh scales. IC Role / Device Role / Timing Role: First-stage in-amp driver with 110dB CMRR at ±12.5V common mode, rejecting power supply ripple and EMI. Use Value: 2µV/°C VOS drift and 5nV/√Hz input noise enable sub-10ppm measurement stability over temperature. |
| 16-Bit ADC Buffer | Low-Distortion Active Filter |
|
Use Scenario: Driving SAR or sigma-delta ADC inputs (e.g., LTC1605) requiring full 16-bit ENOB across DC to 100kHz. IC Role / Device Role / Timing Role: Noninverting unity-gain buffer with 30V/µs slew rate and –96.5dB THD at 100kHz, 10VP-P. Use Value: Maintains 16-bit AC/DC accuracy without gain error or harmonic distortion degradation in data acquisition systems. |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter for audio or vibration sensing with <0.01% passband ripple. IC Role / Device Role / Timing Role: High-slew-rate gain stage (AV = 2) in multiple-feedback topology, exploiting 200MHz GBW for flat group delay. Use Value: Enables >100kHz filter cutoff with <0.1dB gain error and phase deviation <2° - critical for time-domain fidelity. |
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 |
|---|---|---|---|
| LT1468CS8-2#PBF | Same silicon, 0°C to 70°C temp grade; 150µV max VOS vs 75µV for I-grade | Not qualified for extended industrial environments; unsuitable for outdoor or automotive under-hood use | Select LT1468IS8-2#PBF when operating outside 0°C–70°C or requiring guaranteed 75µV VOS max over full range |
| LTC6228IS8#PBF | Unity-gain stable, 725MHz GBW, 500V/µs slew, but 125µV max VOS and higher 6.5mA IS | Supports AV = 1 configurations; trades DC precision for RF bandwidth - not drop-in for AV ≥ 2 only designs | Choose LTC6228IS8#PBF only when unity-gain stability or >200MHz signal bandwidth is mandatory |
Compared with LT1468CS8-2#PBF, the LT1468IS8-2#PBF guarantees tighter offset and drift specs across –40°C to 85°C; versus LTC6228IS8#PBF, it offers superior DC accuracy and lower supply current at the cost of unity-gain instability - making it optimal for fixed-gain ≥2 precision signal chains.
Availability
LT1468IS8-2#PBF is available at Aetrix Electronics and suitable for 16-bit DAC I-to-V conversion, precision instrumentation front-ends, and high-accuracy ADC buffering requiring stable component supply across industrial temperature ranges.
Supply support for LT1468IS8-2#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio with rigorous characterization and long-term product commitment.
The LT1468 family was designed specifically for high-resolution data acquisition systems demanding simultaneous 16-bit DC accuracy and 200MHz AC performance in gain-stable configurations.
FAQ
What is the minimum stable gain for LT1468IS8-2#PBF?
The LT1468IS8-2#PBF is decompensated and requires a minimum closed-loop gain of 2 (AV ≥ 2) for stability. This includes inverting configurations where |AV| = RF/RG ≥ 2. At AV = 1, the part exhibits peaking and potential oscillation due to reduced internal compensation capacitance.
Does LT1468IS8-2#PBF support ±5V supplies?
Yes, LT1468IS8-2#PBF is fully specified for operation on ±5V supplies, including all key parameters: 190MHz gain bandwidth, 22V/µs slew rate, ≤175µV input offset voltage, and ±2.8V output swing into 2kΩ - enabling compatibility with low-voltage mixed-signal systems.
Why are Pins 1 and 8 labeled NULL on the LT1468IS8-2#PBF?
Pins 1 and 8 on LT1468IS8-2#PBF are factory-trim terminals for inverting input bias current cancellation and must remain unconnected. Pin 1 adjusts IB– at 0V common mode; Pin 8 is internally connected during test only - neither serves a functional role in end-user circuits.
How does LT1468IS8-2#PBF achieve 16-bit accuracy in DAC I-to-V applications?
LT1468IS8-2#PBF achieves 16-bit accuracy via ≤75µV max input offset voltage, ≤2µV/°C drift, and factory-trimmed IB– ≤ ±10nA - ensuring offset error remains below 1 LSB (153µV) in 10V full-scale DAC interfaces across –40°C to 85°C without external trimming.
Can LT1468IS8-2#PBF drive heavy capacitive loads?
LT1468IS8-2#PBF is not optimized for direct capacitive loading >100pF. For DAC outputs with tens of pF capacitance, a feedback capacitor (CF = RG × CIN / RF) is required to cancel the pole formed by feedback network and input capacitance - as documented in the Applications Information section.
LT1468IS8-2#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:
- -
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 200 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1468IS8-2#PBF FAQ
1.How can I place an order for LT1468IS8-2#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1468IS8-2#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 LT1468IS8-2#PBF reliable?
The price and inventory of LT1468IS8-2#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1468IS8-2#PBF is usually 5 days.
3.What payment methods are accepted for LT1468IS8-2#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1468IS8-2#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1468IS8-2#PBF?
LT1468IS8-2#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1468IS8-2#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 LT1468IS8-2#PBF?
For technical support, including LT1468IS8-2#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1468IS8-2#PBF requirements.
6.How does Aetrix verify that LT1468IS8-2#PBF is sourced from the original manufacturer or authorized distributors?
All LT1468IS8-2#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 LT1468IS8-2#PBF meets industry standards.
7.What is the process for return or replacement of LT1468IS8-2#PBF?
All LT1468IS8-2#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1468IS8-2#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 LT1468IS8-2#PBF part is unused and in its original packaging.
Return procedure for LT1468IS8-2#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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