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Analog Devices Inc. LT1027DCS8-5#TRPBF
- Part No.:
- LT1027DCS8-5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1027DCS8-5#TRPBF.pdf
- Description:
- IC VREF SERIES 5V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,985
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Product details
Overview
LT1027DCS8-5#TRPBF from Analog Devices (formerly Linear Technology) is a precision 5V buried Zener voltage reference IC designed for high-accuracy A-to-D and D-to-A converter systems. It delivers ±0.0025V initial accuracy, 2–5 ppm/°C max temperature coefficient, 15mA output sourcing capability, and <3µVP-P (0.1Hz–10Hz) low-frequency noise - enabling stable reference performance in 12- to 16-bit data acquisition circuits.
For engineers reviewing the LT1027DCS8-5#TRPBF datasheet, LT1027DCS8-5#TRPBF pinout, LT1027DCS8-5#TRPBF application, or LT1027DCS8-5#TRPBF equivalent, key selection criteria include its SO-8 package compatibility with legacy LT1021-5 layouts, low-drift operation over 0°C to 70°C, fast 2µs transient settling, and NR pin-enabled noise filtering for sensitive ADC reference inputs.
Technical Context
The LT1027DCS8-5#TRPBF employs Linear's proprietary subsurface Zener bipolar process to eliminate surface-breakdown noise and long-term drift. Its class-B NPN/PNP output stage enables rapid recovery from load transients typical of successive-approximation ADC reference inputs.
It features a dedicated Noise Reduction (NR) pin accepting a 1µF capacitor to reduce wideband RMS noise from 2.0µV to ~1.2µV in 10Hz–1kHz bandwidth, and a VTRIM pin supporting ±30mV adjustment range without degrading temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000 V ±2.5 mV (LT1027D grade; ensures ≤0.5 LSB error in 12-bit 5VFS systems) |
| Temp Coefficient | 2–5 ppm/°C (max over 0°C to 70°C; supports ≤0.5 LSB drift across 40°C span) |
| Output Noise | <3 µVP-P (0.1Hz–10Hz); critical for high-resolution DC measurements |
| Load Regulation | ±6 ppm/mA sourcing (0–15 mA); trace-resistance compensation via negative output impedance) |
| Line Regulation | 3–6 ppm/V (10–40 V input); maintains stability across wide supply variations |
| Supply Current | 2.2–3.5 mA; enables low-power precision without heated oven references |
| Ripple Rejection | ≥110 dB at 100 Hz; suppresses switching regulator noise coupling into reference path |
Pinout & Package
LT1027DCS8-5#TRPBF is housed in an 8-lead plastic SO (SO-8, narrow 0.150") package with thermal resistance θJA = 180°C/W. Pin 1 is VIN; pins 2–4 are NC (internally connected, no external connection); pin 5 is NR; pin 6 is GND; pin 7 is VTRIM; pin 8 is VOUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply | Accepts 8–40 V; internal regulation enables stable 5V output despite input ripple |
| NC (Pins 2–4) | No-connect | Internally tied; external connection prohibited per datasheet |
| NR (Pin 5) | Noise reduction node | Connects to 1µF capacitor to ground to reduce broadband noise by >30% |
| GND (Pin 6) | Analog ground return | Carries only ~2 mA bias current; suitable as low-side Kelvin sense point |
| VTRIM (Pin 7) | Voltage adjust terminal | 20 kΩ impedance, 2.5 V open-circuit; enables ±30 mV trimming with 10 kΩ pot |
| VOUT (Pin 8) | Precision 5V output | Sources up to 15 mA; settles in <2 µs after 10 mA AC load step |
Key Features
| Feature | Design Value |
|---|---|
| Buried Zener architecture | Eliminates popcorn noise and surface-related long-term drift; enables 20 ppm/month stability |
| Class-B output stage | Enables 2 µs settling time on 10 mA load transients - optimal for SAR ADC reference inputs |
| Dedicated NR pin | Reduces 0.1Hz–10Hz noise to <3 µVP-P; avoids need for external low-noise op-amp buffers |
| Negative output impedance | –0.015 Ω compensates PCB trace resistance, improving remote load regulation |
| VTRIM adjustability | ±30 mV trim range without affecting TC - allows system-level calibration without degrading drift spec |
Applications
| High-Resolution Data Acquisition | Portable Digital Multimeter |
|---|---|
Use Scenario: 16-bit sigma-delta ADC measuring thermocouple or strain gauge signals in industrial PLC modules. IC Role / Device Role / Timing Role: Primary voltage reference supplying REF+ and REF– inputs to LTC2400-family ADCs. Use Value: 2 ppm/°C TC and <3 µVP-P noise ensure ≤1 LSB total error over –25°C to +75°C operating range. |
Use Scenario: Battery-powered handheld DMM requiring stable 5V reference for autoranging and auto-zero functions. IC Role / Device Role / Timing Role: Low-quiescent-current (2.2 mA) precision reference powering ADC and microcontroller analog peripherals. Use Value: SO-8 package and 8–40 V input range support direct use of unregulated Li-ion or 9V battery supplies with minimal external components. |
| Calibration Equipment Reference Standard | Medical Patient Monitor Analog Front-End |
Use Scenario: Benchtop calibrator generating traceable 5.000 V outputs for field instrument verification. IC Role / Device Role / Timing Role: Primary reference in metrology-grade voltage source with manual VTRIM calibration. Use Value: ±2.5 mV initial accuracy and ±30 mV trim range enable factory calibration to ±0.05% absolute tolerance. |
Use Scenario: ECG/SpO₂ module requiring ultra-low-noise reference for biopotential amplifier gain stages. IC Role / Device Role / Timing Role: Clean 5V rail for instrumentation amplifiers and anti-aliasing filters. Use Value: NR pin filtering reduces 0.1Hz–10Hz noise below 3 µVP-P, preventing baseline wander in sub-Hz physiological signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1021CS8-5#TRPBF | Higher 5 ppm/°C TC; 0.5% initial accuracy; same SO-8 pinout | Lower-cost option where 12-bit accuracy suffices; less suitable for 16-bit systems | Select when budget constraints outweigh drift requirements and system calibration is frequent |
| LT1461ACS8-5#TRPBF | Bandgap-based; 3 ppm/°C TC; 0.04% initial accuracy; 1.2 mA supply current | Lower power, wider input range (2.5–36 V); higher noise (10 µVP-P) | Prefer for battery-operated devices needing LDO-like efficiency but tolerating higher noise |
Compared with LT1027DCS8-5#TRPBF, LT1021CS8-5#TRPBF trades drift performance for cost, while LT1461ACS8-5#TRPBF offers lower quiescent current and broader input range at the expense of increased low-frequency noise - making LT1027DCS8-5#TRPBF optimal for noise-sensitive, high-accuracy, fixed-supply applications.
Availability
LT1027DCS8-5#TRPBF is available at Aetrix Electronics and suitable for high-resolution data acquisition, portable test equipment, calibration standards, and medical analog front-end designs requiring stable component supply with guaranteed long-term availability.
Supply support for LT1027DCS8-5#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 continues its legacy of high-performance analog ICs, focusing on signal conditioning, precision conversion, and power management solutions for demanding industrial and instrumentation markets.
The LT1027 series was developed specifically for 12- to 16-bit data converter systems requiring low-drift, low-noise, and fast-settling references - eliminating the need for power-hungry oven-controlled or heated-substrate alternatives.
FAQ
What is the operating temperature range for LT1027DCS8-5#TRPBF?
The LT1027DCS8-5#TRPBF is rated for 0°C to 70°C ambient operation (Commercial grade). This range is confirmed in the Electrical Characteristics table under "Operating Temperature Range" for LT1027C/D variants and aligns with the S8 package thermal specifications (θJA = 180°C/W). Operation outside this range may violate guaranteed TCVOUT and long-term stability specs.
Can LT1027DCS8-5#TRPBF drive a 10kΩ load directly?
Yes - LT1027DCS8-5#TRPBF can drive a 10kΩ load directly. With a 5V output and maximum 15mA sourcing capability, it supports loads down to 333Ω (5V/15mA). A 10kΩ load draws only 0.5mA, well within specification. Load regulation remains ≤6 ppm/mA, ensuring <3 µV error due to current variation - negligible for most precision applications.
Is LT1027DCS8-5#TRPBF pin-compatible with LT1021-5 in SO-8 packages?
Yes - LT1027DCS8-5#TRPBF shares identical SO-8 pinout and footprint with LT1021CS8-5#TRPBF and LT1021DS8-5#TRPBF, as confirmed in the "PACKAGE/ORDER INFORMATION" section showing matching S8 top-view diagrams. Both feature VIN (Pin 1), NC (Pins 2–4), NR/GND/VTRIM/VOUT assignments - enabling drop-in replacement where drift and noise specs permit.
How does the NR pin reduce noise in LT1027DCS8-5#TRPBF?
The NR pin connects to the positive input of the internal scaling amplifier. Adding a 1µF capacitor between NR and GND forms a low-pass filter that reduces wideband RMS noise from 2.0µV to ~1.2µV in the 10Hz–1kHz band and cuts 0.1Hz–10Hz peak-to-peak noise to <3µV. This is verified in Figure G09 (Noise Density) and G12 (0.1Hz–10Hz Output Noise) of the datasheet.
What is the maximum input voltage for LT1027DCS8-5#TRPBF?
The absolute maximum input voltage for LT1027DCS8-5#TRPBF is 40V, as stated in the "ABSOLUTE MAXIMUM RATINGS" table. The device operates over 8V to 40V input (per Typical Application TA01), with line regulation specified up to 40V. Exceeding 40V risks permanent damage; input transient protection is recommended for systems with potential overshoot.
LT1027DCS8-5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.05%
- Temperature Coefficient:
- 5ppm/°C
- Noise - 0.1Hz to 10Hz:
- 3µVp-p
- Noise - 10Hz to 10kHz:
- 10µVrms
- Voltage - Input:
- 8V ~ 40V
- Current - Supply:
- 3.5mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1027DCS8-5#TRPBF FAQ
1.How can I place an order for LT1027DCS8-5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1027DCS8-5#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 LT1027DCS8-5#TRPBF reliable?
The price and inventory of LT1027DCS8-5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1027DCS8-5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1027DCS8-5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1027DCS8-5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1027DCS8-5#TRPBF?
LT1027DCS8-5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1027DCS8-5#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 LT1027DCS8-5#TRPBF?
For technical support, including LT1027DCS8-5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1027DCS8-5#TRPBF requirements.
6.How does Aetrix verify that LT1027DCS8-5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1027DCS8-5#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 LT1027DCS8-5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1027DCS8-5#TRPBF?
All LT1027DCS8-5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1027DCS8-5#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 LT1027DCS8-5#TRPBF part is unused and in its original packaging.
Return procedure for LT1027DCS8-5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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