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Analog Devices Inc. LT1369CS#PBF
- Part No.:
- LT1369CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1369CS#PBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,407
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Product details
Overview
LT1369CS#PBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input/output precision operational amplifier optimized for low-voltage, high-accuracy signal conditioning. It features 400kHz gain-bandwidth, 0.13V/µs slew rate, ±15V to 1.8V supply range, 150µV typical input offset voltage, and 90dB common-mode rejection over full rail-to-rail input range - enabling use in A/D converter drivers, supply current sensing, and low-voltage sensor interfaces.
For engineers reviewing the LT1369CS#PBF datasheet, LT1369CS#PBF pinout, LT1369CS#PBF application, or LT1369CS#PBF equivalent, key selection criteria include its 14-pin SOIC package with standard quad op amp pinout, 0.1µF required output capacitor for stability, 375µA per amplifier supply current, and guaranteed 800µV max input offset at 25°C - critical for precision DC-coupled systems requiring minimal drift and high PSRR.
Technical Context
The LT1369CS#PBF implements dual-input-stage architecture (PNP/NPN) that enables true rail-to-rail input operation across 1.8V–36V supplies, with automatic stage switching controlled by comparator Q5. Its output stage uses complementary Darlington pairs (Q23–Q26) with local C1/C2 feedback to achieve rail-to-rail swing and reduced high-frequency output impedance.
Unlike the LT1367, the LT1369CS#PBF requires a mandatory 0.1µF output capacitor for compensation - improving PSRR by ~20dB at 50kHz and reducing output impedance above 100kHz - making it specifically suited for mixed-signal systems with noisy switching supplies or high-resolution ADC driving where noise filtering is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of Amplifiers | Quad (4 independent op amps) |
| Supply Voltage Range | 1.8V to ±15V - supports single-supply 3.3V/5V and dual-supply ±15V systems without level-shifting |
| Gain-Bandwidth Product | 400kHz - sufficient for anti-aliasing filters, sensor amplification, and DC-coupled instrumentation |
| Input Offset Voltage (max) | 800µV at 25°C - enables sub-millivolt accuracy in 12-bit+ data acquisition front-ends |
| Common-Mode Rejection | 90dB over full rail-to-rail input range - maintains precision when inputs approach V+ or V− |
| Output Drive Capability | ±30mA short-circuit current - drives 10kΩ loads with <200mV saturation at 2.5mA sink/source |
| Supply Current per Amp | 375µA - enables ultra-low-power operation in battery-powered precision sensors |
Pinout & Package
LT1369CS#PBF is housed in a 14-lead plastic SOIC (S package) with standard quad op amp pinout and θJA = 150°C/W. The package is RoHS-compliant, lead-free, and rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - rail-to-rail swing, requires 0.1µF capacitor to V− for stability |
| 2 | –IN A | Inverting input of Amp A - part of PNP/NPN dual-input stage with rail-to-rail common-mode range |
| 3 | +IN A | Non-inverting input of Amp A - same rail-to-rail input capability as –IN A |
| 4 | V+ | Positive supply rail - accepts 1.8V to +36V or +15V in dual-supply mode |
| 5 | +IN B | Non-inverting input of Amp B - electrically isolated but matched to Amp A for common-mode performance |
| 6 | –IN B | Inverting input of Amp B - channel-to-channel VOS match ≤1900µV ensures consistent DC gain |
| 7 | OUT B | Amplifier B output - identical AC/DC specs and capacitor requirement as OUT A |
| 8 | OUT D | Amplifier D output - pin 8 is top-right corner in standard SOIC orientation (pin 1 marked) |
| 9 | –IN D | Inverting input of Amp D - shares V− reference with all amplifiers; no internal isolation |
| 10 | +IN D | Non-inverting input of Amp D - supports differential input configurations across multiple channels |
| 11 | V− | Negative supply rail - accepts 0V (single-supply) or –36V/–15V; return path for 0.1µF capacitor |
| 12 | +IN C | Non-inverting input of Amp C - enables simultaneous 4-channel buffering or parallel gain stages |
| 13 | –IN C | Inverting input of Amp C - matched bias current (≤15nA shift) minimizes error in summing applications |
| 14 | OUT C | Amplifier C output - fully specified for 30mA drive and rail-to-rail swing under load |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Operates with inputs from V− to V+ and outputs within 12mV of rails at 0.5mA load - eliminates external level-shifting in 3.3V systems |
| 0.1µF output capacitor requirement | Enables 10× higher PSRR at 50kHz vs LT1367 - critical for ADC drivers sharing noisy digital supplies |
| Low input bias current (10nA typ) | Minimizes voltage error across high-impedance sensor sources (e.g., pH electrodes, thermistors) |
| High CMRR (90dB) | Maintains accuracy in presence of ground shifts or EMI coupling on long sensor cables |
| Wide supply range (1.8V to ±15V) | Single BOM supports both portable 3.3V designs and industrial ±15V test equipment |
Applications
| Supply Current Sensing at Either Rail | Rail-to-Rail Buffer Amplifiers |
|---|---|
Use Scenario: Monitoring load current in 3.3V microcontroller power rails using a 20mΩ sense resistor and single-supply configuration. IC Role / Device Role / Timing Role: LT1369CS#PBF configured as non-inverting amplifier with V− referenced to ground, measuring voltage drop across Rsense with rail-to-rail input capability down to 0V. Use Value: Enables accurate current measurement from 0A up to 1.5A with <1% error, leveraging 150µV VOS and 90dB CMRR to reject supply ripple. | Use Scenario: Buffering 0–3.3V analog sensor outputs (e.g., temperature, pressure) into successive approximation ADCs with 1MΩ input impedance. IC Role / Device Role / Timing Role: LT1369CS#PBF used as unity-gain buffer with rail-to-rail input/output to preserve full dynamic range without clipping or level shift. Use Value: Delivers <0.01% gain error and <10µV offset drift over temperature, ensuring 12-bit linearity without calibration. |
| Low Voltage Signal Processing | Driving A/D Converters |
Use Scenario: Amplifying weak signals from MEMS accelerometers operating from 2.5V supply with output swing limited to 0.2–2.3V. IC Role / Device Role / Timing Role: LT1369CS#PBF configured as inverting amplifier with gain = 2, powered from same 2.5V rail as sensor, using rail-to-rail I/O to maximize SNR. Use Value: Achieves 70dB SNR at 1kHz with 29nV/√Hz input noise and 0.13V/µs slew rate - sufficient for 16ksps sampling. | Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., LTC23xx) with 100kSPS throughput and 100pF input capacitance. IC Role / Device Role / Timing Role: LT1369CS#PBF used as track-and-hold buffer with 0.1µF output capacitor to suppress high-frequency noise and supply coupling. Use Value: Reduces THD+N to <0.001% at 1kHz and prevents code flicker by lowering output impedance below 1Ω at 1MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1367CS#PBF | No external capacitor required; 1000pF max capacitive load stable; 0.4MHz GBW; 0.13V/µs slew rate | Better for high-speed, capacitor-free layouts; lower PSRR above 10kHz than LT1369 | Select LT1367CS#PBF when layout constraints prohibit 0.1µF capacitor or when driving purely resistive loads |
| OP4177ARZ | Lower VOS (60µV max), lower noise (7.9nV/√Hz), but only 1.3MHz GBW; no rail-to-rail input; requires ±5V min | Better for low-noise, high-precision DC applications; incompatible with 3.3V single-supply systems | Select OP4177ARZ when ultimate DC accuracy is required and supply >±5V is available |
Compared with LT1367CS#PBF, LT1369CS#PBF trades capacitor-free operation for 10× better PSRR at 50kHz and lower output impedance - making it superior for ADC drivers in mixed-signal systems; versus OP4177ARZ, LT1369CS#PBF offers rail-to-rail I/O and wider supply range but higher VOS and noise.
Availability
LT1369CS#PBF is available at Aetrix Electronics and suitable for precision sensor interfaces, industrial current monitoring, and high-resolution data acquisition systems requiring stable component supply and long-term manufacturability.
Supply support for LT1369CS#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 ICs for precision instrumentation, industrial automation, and communications.
The LT1369CS#PBF belongs to Linear Technology's legacy rail-to-rail precision op amp family, designed specifically for applications demanding wide supply range, low offset, and robust performance in noisy, low-voltage environments.
FAQ
What is the required output capacitor value for stable operation of the LT1369CS#PBF?
The LT1369CS#PBF requires a 0.1µF ceramic capacitor connected between OUT and V− pins for stable operation. This capacitor improves PSRR by ~20dB at 50kHz and reduces high-frequency output impedance. Tolerance is not critical; X7R or C0G dielectrics are acceptable. Omitting this capacitor risks oscillation or degraded transient response.
Does the LT1369CS#PBF support true rail-to-rail input operation at 1.8V supply?
Yes, the LT1369CS#PBF supports rail-to-rail input operation from V− to V+ across its full 1.8V to ±15V supply range. At 1.8V single supply, inputs can swing from 0V to 1.8V while maintaining 90dB CMRR and 150µV typical VOS - verified in the datasheet's Electrical Characteristics tables at VS = 3V, 0V.
How does the LT1369CS#PBF differ from the LT1367CS#PBF in terms of compensation and stability?
The LT1369CS#PBF uses frequency-compensation requiring a 0.1µF output capacitor, whereas the LT1367CS#PBF uses conventional internal compensation stable up to 1000pF capacitive load. This makes LT1369CS#PBF unsuitable for direct replacement in capacitor-free circuits but superior for noise-sensitive ADC driver applications due to enhanced PSRR and lower output impedance.
What is the maximum guaranteed input offset voltage for the LT1369CS#PBF over temperature?
The LT1369CS#PBF has a maximum input offset voltage of 950µV over the 0°C to 70°C operating temperature range, as specified in the "Electrical Characteristics" table under "l" conditions (VS = 5V, 0V). Input offset voltage drift is 2–6µV/°C, contributing to total error budget in precision DC applications.
Can the LT1369CS#PBF drive a 10kΩ load while maintaining rail-to-rail output swing?
Yes, the LT1369CS#PBF delivers rail-to-rail output swing into 10kΩ loads: VOH reaches VCC – 4mV and VOL stays within VEE + 6mV at no load, degrading to VCC – 150mV and VEE + 120mV at 2.5mA sink/source - well within rail-to-rail definition (<200mV from rails) and sufficient for 12-bit ADC interfacing.
LT1369CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.065V/µs
- Gain Bandwidth Product:
- 160 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 370µA (x4 Channels)
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT1369CS#PBF FAQ
1.How can I place an order for LT1369CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1369CS#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 LT1369CS#PBF reliable?
The price and inventory of LT1369CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1369CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1369CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1369CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1369CS#PBF?
LT1369CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1369CS#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 LT1369CS#PBF?
For technical support, including LT1369CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1369CS#PBF requirements.
6.How does Aetrix verify that LT1369CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1369CS#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 LT1369CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1369CS#PBF?
All LT1369CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1369CS#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 LT1369CS#PBF part is unused and in its original packaging.
Return procedure for LT1369CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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