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Analog Devices Inc. LT1369CS#TRPBF
- Part No.:
- LT1369CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1369CS#TRPBF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,957
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Product details
Overview
LT1369CS#TRPBF from Analog Devices (formerly Linear Technology) is a quad rail-to-rail input and output precision operational amplifier optimized for low-voltage, high-accuracy signal conditioning. It features 150µV typical input offset voltage, 90dB common-mode rejection over full rail-to-rail input range, 0.065V/µs slew rate, 160kHz gain-bandwidth product, and operates from 1.8V to ±15V supplies. It is used in A/D converter driving, supply current sensing, and low-voltage sensor interfaces.
For engineers reviewing the LT1369CS#TRPBF datasheet, LT1369CS#TRPBF pinout, LT1369CS#TRPBF application, or LT1369CS#TRPBF equivalent, key selection criteria include its 0.1µF required output capacitor for stability, quad SO-14 package with standard pinout, rail-to-rail swing at ±15V/5V/3V supplies, and guaranteed 800µV max input offset at 0°C to 70°C.
Technical Context
The LT1369CS#TRPBF implements dual-input-stage architecture-PNP and NPN differential pairs-switched by comparator Q5 to maintain rail-to-rail common-mode input range. 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#TRPBF requires a mandatory 0.1µF output capacitor for compensation, which improves PSRR by ~20dB at 50kHz and suppresses high-frequency noise when driving ADCs. This capacitor also enables stable operation with capacitive loads but precludes use in unity-gain follower configurations without it.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (max) | 800 µV at 25°C, 950 µV over 0°C–70°C - sets DC accuracy limit in precision gain stages |
| CMRR (typ) | 90 dB over full rail-to-rail input - maintains accuracy when amplifying small signals referenced to noisy rails |
| PSRR (typ) | 105 dB at DC, >80 dB up to 100 kHz - rejects supply noise critical in mixed-signal systems |
| Gain-Bandwidth Product | 160 kHz at AV = 1000 - supports stable closed-loop gain up to ~100 at 1.6 kHz |
| Slew Rate | 0.065 V/µs - limits large-signal settling time; suitable for <10 kHz full-power bandwidth |
| Supply Current per Amp | 375 µA (typ), 540 µA (max) - enables ultra-low-power operation in battery-powered sensors |
| Output Swing (RL=10k) | VOL = 12 mV above V–, VOH = V+ – 4 mV - delivers true rail-to-rail dynamic range for 12-bit+ ADC interfacing |
Pinout & Package
LT1369CS#TRPBF is housed in a 14-lead plastic SO (SO-14) surface-mount package with standard quad op amp pinout and JEDEC MS-012AC footprint. Thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Rail-to-rail output capable of sourcing/sinking 30 mA; requires 0.1 µF capacitor to V– for stability |
| 2 (–IN A) | Inverting input A | High-impedance node; accepts voltages from V– to V+ due to dual PNP/NPN input stage |
| 3 (+IN A) | Non-inverting input A | Same rail-to-rail common-mode range as Pin 2; offset-matched to Pin 2 within 650 µV (max) |
| 4 (V+) | Positive supply | Accepts 1.8V to +18V single supply or +15V in split-supply mode; powers all four amplifiers |
| 5 (+IN B) | Non-inverting input B | Channel B input; matches A-channel specs; independent bias current path |
| 6 (–IN B) | Inverting input B | Matches Pin 2 electrically; channel-to-channel VOS match ≤650 µV ensures matched gain paths |
| 7 (OUT B) | Amplifier B output | Identical to Pin 1; shares same compensation requirement and drive capability |
| 8 (OUT D) | Amplifier D output | Independent output; pin 8 is top-right corner in top-view orientation per SO-14 standard |
| 9 (–IN D) | Inverting input D | Bottom row leftmost input; part of D/C pair with matching characteristics per datasheet Note 4 |
| 10 (V–) | Negative supply / GND | Reference for all amplifiers; return path for 0.1 µF compensation cap connected between OUTx and V– |
| 11 (+IN C) | Non-inverting input C | Third channel input; electrically identical to Pins 3 and 5; supports multi-channel synchronous sensing |
| 12 (–IN C) | Inverting input C | Matches Pin 6; enables matched quad instrumentation front-end design |
| 13 (OUT C) | Amplifier C output | Completes quad set; all outputs share same slew rate, GBW, and rail-to-rail swing specs |
| 14 (NC) | No connect | Not internally bonded; must be left floating or tied to V– for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables direct interface with 0–3.3V/5V microcontroller ADCs without level-shifting circuitry |
| 0.1µF output capacitor compensation | Reduces high-frequency output impedance and improves PSRR by ≥20dB at 50kHz for clean ADC driving |
| Quad amplifier with matched channels | Channel-to-channel VOS match ≤650 µV (max) supports precision differential and instrumentation amplifier designs |
| Wide supply range (1.8V to ±15V) | Operates from single-cell Li-ion (3.0V) to industrial ±15V rails without redesign |
| Low 375µA supply current per amp | Supports always-on sensor signal conditioning in energy-constrained IoT endpoints |
Applications
| Current Sensing at Either Rail | Rail-to-Rail Sensor Signal Conditioning |
|---|---|
Use Scenario: Monitoring battery discharge current in portable medical devices using a low-side shunt resistor. IC Role / Device Role / Timing Role: LT1369CS#TRPBF configured as a non-inverting amplifier with gain = 200 to amplify 10mV shunt voltage while rejecting common-mode noise from shared ground. Use Value: Input common-mode range includes V– (GND), enabling accurate low-side sensing without level shifters or expensive isolated amplifiers. | Use Scenario: Amplifying output of a 0–2.5V MEMS pressure sensor feeding a 12-bit SAR ADC in an automotive cabin controller. IC Role / Device Role / Timing Role: LT1369CS#TRPBF used as unity-gain buffer with 0.1µF output capacitor to drive ADC sample-and-hold capacitance while suppressing switching noise. Use Value: Rail-to-rail output swing preserves full 0–2.5V dynamic range; improved PSRR prevents digital supply noise from corrupting analog measurements. |
| A/D Converter Driver | Multi-Channel Precision Data Acquisition |
Use Scenario: Driving the input of a 16-bit delta-sigma ADC in a programmable logic controller analog input module. IC Role / Device Role / Timing Role: LT1369CS#TRPBF configured as a gain-of-2 amplifier with 0.1µF capacitor on each output to filter high-frequency noise before ADC sampling. Use Value: Output capacitor reduces broadband noise density and stabilizes settling, enabling <1 LSB error at 16-bit resolution. | Use Scenario: Simultaneous acquisition of four thermocouple signals in an industrial oven controller using cold-junction compensation. IC Role / Device Role / Timing Role: LT1369CS#TRPBF provides matched gain and offset performance across all four channels for synchronized, calibrated readings. Use Value: Channel-to-channel VOS match ≤650 µV and CMRR ≥90 dB ensure consistent measurement accuracy across all inputs without per-channel calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1367CS#TRPBF | No external capacitor required; 400kHz GBW; higher slew rate (0.13V/µs); less PSRR improvement at high frequency | Better for wideband AC-coupled signal paths; unsuitable where supply noise filtering is critical | Select LT1367CS#TRPBF when bandwidth >200kHz is needed and PSRR beyond 10kHz is not required |
| AD8604ARUZ | Fully rail-to-rail I/O; 8MHz GBW; 5V-only supply; no external capacitor; CMOS input (fA bias current) | Superior for high-impedance sensor buffering; incompatible with ±15V or 1.8–3.3V operation | Select AD8604ARUZ for low-power, high-Z, single-supply 5V systems where bandwidth >1MHz is essential |
Compared with LT1367CS#TRPBF and AD8604ARUZ, the LT1369CS#TRPBF uniquely balances ultra-low supply current, wide supply flexibility (1.8V–±15V), and integrated supply-noise filtering via its mandatory 0.1µF capacitor-making it optimal for precision, noise-sensitive, multi-supply industrial data acquisition.
Availability
LT1369CS#TRPBF is available at Aetrix Electronics and suitable for current sensing, A/D converter driving, and multi-channel sensor signal conditioning requiring stable component supply and long-term industrial availability.
Supply support for LT1369CS#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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear op amps including the LT1369 family.
The LT1369CS#TRPBF belongs to Linear's precision rail-to-rail op amp product line, designed specifically for applications demanding both wide supply range and high DC accuracy in noisy, mixed-signal environments.
FAQ
What is the required output capacitor value for stable operation of the LT1369CS#TRPBF?
The LT1369CS#TRPBF requires a 0.1µF ceramic capacitor connected between each output pin and the V– (negative supply) pin for internal compensation and stability. This capacitor is mandatory-not optional-and directly enables its improved PSRR and low high-frequency output impedance. Omitting it causes instability and oscillation, especially under capacitive loads.
Can the LT1369CS#TRPBF operate from a single 3.3V supply?
Yes, the LT1369CS#TRPBF is fully specified for single-supply operation from 1.8V to 36V total supply range, including 3.3V. At 3.3V, it maintains rail-to-rail input (0V to 3.3V) and output (within 12mV of rails), 150µV typical VOS, and 375µA per amplifier supply current-making it ideal for low-voltage portable instrumentation.
How does the LT1369CS#TRPBF differ from the LT1367CS#TRPBF?
The LT1369CS#TRPBF differs from the LT1367CS#TRPBF primarily in compensation architecture: LT1369 requires a 0.1µF output capacitor to achieve higher PSRR (>80dB at 100kHz) and lower output impedance, while LT1367 uses conventional compensation (stable up to 1000pF) with higher GBW (400kHz) and slew rate (0.13V/µs). Both are quad SO-14, but LT1369 trades bandwidth for noise immunity.
What is the maximum guaranteed input offset voltage for LT1369CS#TRPBF over temperature?
The LT1369CS#TRPBF has a maximum input offset voltage of 950 µV over the full 0°C to 70°C operating temperature range, as specified in the "Electrical Characteristics" table under "l" conditions (0°C < TA < 70°C). At 25°C only, the max is 800 µV. The typical drift is 2–6 µV/°C, contributing to this spread.
Is the LT1369CS#TRPBF pin-compatible with standard quad op amp footprints?
Yes, the LT1369CS#TRPBF uses the industry-standard 14-lead SO (SOIC-14) package with the conventional quad op amp pinout defined in Linear's datasheet: Pins 1/7/8/13 are outputs, Pins 2/3/5/6/9/11/12 are inputs, Pin 4 is V+, Pin 10 is V–, and Pin 14 is NC. It is mechanically and electrically compatible with SO-14 footprints used for LM324, TL074, and other quad op amps.
LT1369CS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT1369CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1369CS#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 LT1369CS#TRPBF reliable?
The price and inventory of LT1369CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1369CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1369CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1369CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1369CS#TRPBF?
LT1369CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1369CS#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 LT1369CS#TRPBF?
For technical support, including LT1369CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1369CS#TRPBF requirements.
6.How does Aetrix verify that LT1369CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1369CS#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 LT1369CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1369CS#TRPBF?
All LT1369CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1369CS#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 LT1369CS#TRPBF part is unused and in its original packaging.
Return procedure for LT1369CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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