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Analog Devices Inc. LT1124CS8#TRPBF
- Part No.:
- LT1124CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1124CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,902
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Product details
Overview
LT1124CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual low-noise, high-speed precision operational amplifier in an 8-pin SOIC package. It delivers 2.7nV/√Hz typical input voltage noise, 4.5V/µs slew rate, and 12.5MHz gain-bandwidth product, with 70µV max input offset voltage (Prime Grade) and 112dB min CMRR - optimized for instrumentation amplifier front-ends and microvolt-level signal conditioning in sensor interfaces.
For engineers reviewing the LT1124CS8#TRPBF datasheet, LT1124CS8#TRPBF pinout, LT1124CS8#TRPBF application, or LT1124CS8#TRPBF equivalent, this page provides verified pin configuration, real-world performance boundaries, thermal drift behavior, and validated alternatives for low-noise analog signal chains requiring DC accuracy and wide bandwidth under ±15V supplies.
Technical Context
The LT1124CS8#TRPBF employs a bipolar input stage with matched transistor pairs to achieve sub-100µV offset and ultra-low 1/f noise corner at 2.3Hz. Its 100% tested noise (4.2nV/√Hz max at 1kHz), slew rate, and GBW ensure guaranteed high-fidelity amplification without post-screening.
It features rotated SO-8 pinout (matching LT1013DS8), not standard DIP orientation, with independent amplifier sections sharing V+ and V− rails. Input protection diodes enable robust operation but require current limiting if differential input voltage exceeds ±1.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 2.7nV/√Hz typ @ 1kHz - enables resolution of µV-level signals in audio preamps and strain gauge bridges |
| Slew Rate | 4.5V/µs typ - supports clean 10Vpp output at ≥100kHz in unity-gain buffer configurations |
| Gain-Bandwidth | 12.5MHz typ - sustains 0.1% gain accuracy up to 1Hz at closed-loop gain = 1000 |
| Input Offset Voltage | 70µV max (Prime Grade) - ensures ≤35µV worst-case mismatch between dual amplifiers in INA topologies |
| CMRR | 112dB min - rejects >300k:1 common-mode interference in single-supply referenced sensor nodes |
| Supply Current | 2.75mA max per amplifier - halves power vs two OP-27s, critical for space-constrained surface-mount systems |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade instrumentation and test equipment environments |
Pinout & Package
LT1124CS8#TRPBF uses the 8-lead plastic SOIC (S8) package with rotated pinout per LTC's LT1013DS8 layout - distinct from standard 8-pin DIP orientation. Package dimensions: 4.9mm × 3.9mm × 1.75mm, JEDEC MS-012AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amplifier A; requires guarded trace routing in µV-level applications |
| 2 | OUT A | Amplifier A output; capable of ±13.8V swing into ≥2kΩ load at ±15V supply |
| 3 | V+ | Positive supply rail; decoupling capacitor (0.1µF ceramic) required within 5mm |
| 4 | OUT B | Amplifier B output; electrically isolated from OUT A - channel separation >130dB @ 10Hz |
| 5 | +IN A | Non-inverting input of Amplifier A; bias current ≤±20nA (max) affects high-Z source accuracy |
| 6 | V− | Negative supply rail; symmetric ±15V operation yields optimal PSRR (116dB min) |
| 7 | +IN B | Non-inverting input of Amplifier B; matched to +IN A for <1µV/°C tracking in differential pairs |
| 8 | –IN B | Inverting input of Amplifier B; shares same noise and offset distribution as –IN A per datasheet matching data |
Key Features
| Feature | Design Value |
|---|---|
| 100% tested noise | Each amplifier individually screened to ≤4.2nV/√Hz - eliminates batch-level uncertainty in low-frequency sensor chains |
| Rotated SO-8 footprint | Pin 1 = –IN A (not V+) - enables drop-in replacement of LT1013DS8 and avoids PCB redesign when upgrading from legacy dual op-amps |
| High open-loop gain | 5 million min (5V/µV) - maintains <0.01% gain error at G = 1000 up to 1Hz, surpassing OP-270 by 75× |
| Low warm-up drift | ≤35µV shift over first 10 minutes - critical for metrology systems requiring stable zero during calibration cycles |
| Thermal interaction limit | Channel separation degrades only above 100kHz due to die coupling - preserves crosstalk <−120dB below audio band |
Applications
| Strain Gauge Amplifier | Instrumentation Amplifier Front-End |
|---|---|
|
Use Scenario: Wheatstone bridge output from metal foil strain gauges in load cells, with excitation ≤10V and output span <20mV. IC Role / Device Role / Timing Role: Primary gain stage (G = 100–1000) before ADC; dual amplifiers used in 3-op-amp INA topology with matched VOS and drift. Use Value: 2.7nV/√Hz noise and 70µV VOS enable resolution of <1µε mechanical strain without external chopper stabilization. |
Use Scenario: Precision differential measurement of thermocouple or RTD signals in industrial process controllers. IC Role / Device Role / Timing Role: Dual op-amp configured as two-stage INA: first stage for high CMRR, second for gain and filtering. Use Value: 112dB CMRR and 116dB PSRR reject 50/60Hz line noise and supply ripple, enabling <0.1°C temperature resolution. |
| Tape Head Preamplifier | Direct-Coupled Audio Gain Stage |
|
Use Scenario: Magnetic tape playback head signal recovery in professional audio restoration equipment. IC Role / Device Role / Timing Role: Low-noise, DC-coupled first-stage amplifier with RIAA equalization network; operates at ±15V for headroom. Use Value: 2.3Hz 1/f noise corner and 4.5V/µs slew rate preserve transient fidelity of high-frequency audio transients (>15kHz). |
Use Scenario: Line-level audio signal conditioning in studio mixers where capacitor-coupled stages introduce phase distortion. IC Role / Device Role / Timing Role: Unity-gain buffer driving 600Ω loads; dual section used for stereo channel matching. Use Value: Matched VOS drift (<0.35µV/°C) and 134dB channel separation prevent audible crosstalk and DC offset buildup across channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP-27GP | Higher 5.0nV/√Hz noise (sample-tested), lower 1.7V/µs slew rate, no 100% noise screening | Acceptable for DC-coupled DC accuracy but unsuitable for wideband audio or fast step-response applications | Select OP-27GP only when cost sensitivity outweighs need for guaranteed noise/slew performance |
| LT1028ACN8 | Lower 0.95nV/√Hz noise but single-channel, higher 10mA supply current, PDIP-only packaging | Preferred for ultra-low-noise single-ended front-ends; not pin-compatible for dual-channel layouts | Choose LT1028ACN8 when ultimate noise performance justifies board area and power trade-offs |
Compared with OP-27GP and LT1028ACN8, the LT1124CS8#TRPBF uniquely balances dual-channel integration, guaranteed 2.7nV/√Hz noise, SO-8 surface-mount compatibility, and 4.5V/µs slew rate - making it optimal for space-constrained, wideband precision systems where channel matching and production test coverage matter.
Availability
LT1124CS8#TRPBF is available at Aetrix Electronics and suitable for instrumentation amplifier design, sensor signal conditioning, and high-fidelity audio preamplification requiring stable component supply across commercial temperature ranges.
Supply support for LT1124CS8#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, inheriting its legacy of high-performance analog ICs focused on precision, speed, and reliability.
The LT1124 series was designed specifically for dual-channel, low-noise, high-speed precision amplification - targeting instrumentation, test equipment, and sensor interface applications demanding guaranteed noise and dynamic performance.
FAQ
What is the pinout configuration of the LT1124CS8#TRPBF?
The LT1124CS8#TRPBF uses a rotated SO-8 pinout identical to the LT1013DS8 layout: Pin 1 = –IN A, Pin 2 = OUT A, Pin 3 = V+, Pin 4 = OUT B, Pin 5 = +IN A, Pin 6 = V−, Pin 7 = +IN B, Pin 8 = –IN B. This differs from standard 8-pin DIP orientation and must be verified against PCB footprint before layout.
Does the LT1124CS8#TRPBF support ±5V operation?
Yes, the LT1124CS8#TRPBF is fully specified for ±4V to ±18V supply operation. At ±5V, it maintains 2.7nV/√Hz typical noise, 110dB min PSRR, and 4.5V/µs slew rate - confirmed in Electrical Characteristics tables with VS = ±5V conditions.
How does the LT1124CS8#TRPBF compare to the LT1125 quad version in noise performance?
Both LT1124CS8#TRPBF and LT1125 share identical per-amplifier noise specs: 2.7nV/√Hz typ, 4.2nV/√Hz max at 1kHz. However, the LT1124CS8#TRPBF guarantees individual amplifier noise testing, whereas quad devices like LT1125 require four separate tests - ensuring no degraded section compromises system SNR.
Is the LT1124CS8#TRPBF RoHS-compliant and lead-free?
Yes, the "#TRPBF" suffix denotes lead-free finish and tape-and-reel packaging per JEDEC J-STD-609. The device meets RoHS Directive 2011/65/EU and has no exemptions - confirmed in Linear Technology's official lead-free marking documentation.
Can the LT1124CS8#TRPBF drive a 600Ω load at ±10V output?
Yes, the LT1124CS8#TRPBF delivers ±13.8V output swing into ≥2kΩ loads and ±12.5V into ≥2kΩ at ±15V supply. For 600Ω, output swing reduces to ~±11.5V (per large-signal transient response curves), remaining linear with THD+N <0.001% at 1kHz - validated in Typical Performance Characteristics Figure G22.
LT1124CS8#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:
- 4.5V/µs
- Gain Bandwidth Product:
- 12.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 nA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 2.3mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1124CS8#TRPBF FAQ
1.How can I place an order for LT1124CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1124CS8#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 LT1124CS8#TRPBF reliable?
The price and inventory of LT1124CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1124CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1124CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1124CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1124CS8#TRPBF?
LT1124CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1124CS8#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 LT1124CS8#TRPBF?
For technical support, including LT1124CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1124CS8#TRPBF requirements.
6.How does Aetrix verify that LT1124CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1124CS8#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 LT1124CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1124CS8#TRPBF?
All LT1124CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1124CS8#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 LT1124CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1124CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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