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Analog Devices Inc. LTC1276BCSW#TRPBF
- Part No.:
- LTC1276BCSW#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1276BCSW#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,916
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Product details
Overview
LTC1276BCSW#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 300ksps successive-approximation ADC with ±5V bipolar input range, on-chip 2.42V reference, internal synchronized clock, and 24-pin SO Wide package. It draws 75mW typical power, achieves ±1/2LSB INL and ±3/4LSB DNL (B-grade), and delivers 70dB S/(N+D) at 150kHz Nyquist frequency. It targets high-speed data acquisition in industrial instrumentation and DSP front-ends.
For engineers reviewing the LTC1276BCSW#TRPBF datasheet, LTC1276BCSW#TRPBF pinout, LTC1276BCSW#TRPBF application, or LTC1276BCSW#TRPBF equivalent, key selection criteria include its ±5V input range compatibility with dual-supply systems, guaranteed DC accuracy over 0°C to 70°C, 2.7µs conversion time, and parallel 12-bit output interface with HBEN-controlled byte multiplexing.
Technical Context
The LTC1276BCSW#TRPBF implements a 12-bit capacitive DAC-based successive approximation register (SAR) architecture with integrated sample-and-hold and factory-trimmed internal clock. Its analog input accepts ±5V signals when powered from ±4.95V to ±5.25V supplies, and it uses a 2.42V bandgap reference with ±5ppm/°C max tempco for full-scale stability.
Digital interface operates via active-low CS, RD, and HBEN control lines, supporting both parallel 12-bit read and two-byte read modes. BUSY pin indicates conversion status, while three-state outputs (D11–D0/8) enable direct connection to microprocessors and FIFOs without external buffers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with no missing codes; guarantees monotonic transfer function for precision measurement. |
| Sampling Rate | 300ksps maximum; enables real-time capture of signals up to 150kHz Nyquist bandwidth. |
| Analog Input Range | ±5V (bipolar); requires VDD = +4.95V to +5.25V and VSS = –4.95V to –5.25V for full accuracy. |
| INL / DNL | ±1/2LSB max INL, ±3/4LSB max DNL (B-grade); ensures <0.012% linearity error across full scale. |
| S/(N + D) | 70dB at 150kHz input; corresponds to ~11.6 effective bits for spectral analysis applications. |
| Power Dissipation | 75mW typical at 300ksps; allows thermal management in dense PCB layouts without forced cooling. |
| Reference Output | 2.42V ±0.02V, ±5ppm/°C max tempco; provides stable DAC reference and supports ≤1mA external load. |
Pinout & Package
Package: 24-lead plastic SO Wide (SW), 0.300" wide body, RoHS-compliant, lead-free (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN (1) | Analog Input | Accepts ±5V differential input relative to AGND; high-impedance node requiring low-source-impedance drive. |
| VREF (2) | Reference Output | 2.42V precision voltage source; must be bypassed with 10µF tantalum + 0.1µF ceramic to AGND. |
| AGND (3) | Analog Ground | Separate ground return for analog circuitry; must be tied to DGND at single point near device. |
| D11–D4 (4–11) | Data Outputs | Three-state MSBs (DB11–DB8) and LSBs (DB7–DB4); enabled only when CS and RD are low. |
| DGND (12) | Digital Ground | Digital return path; connects to system digital plane and ties to AGND at star point. |
| D3/11–D0/8 (13–16) | Data Outputs | Three-state lower byte (DB3–DB0) when HBEN = HIGH; outputs DB11–DB8 when HBEN = LOW. |
| NC (17,18) | No Connection | Unbonded pins; must remain floating per datasheet; no PCB trace or pad required. |
| HBEN (19) | High-Byte Enable | Controls data bus multiplexing: LOW outputs full 12-bit word; HIGH enables byte-mode reads. |
| RD (20) | Read Input | Active-low signal that initiates conversion when CS and HBEN are low; also enables output drivers. |
| CS (21) | Chip Select | Active-low enable for all control logic; must be asserted before RD to activate interface. |
| BUSY (22) | Status Output | Active-low open-drain indicator; goes low at conversion start and high when result is ready. |
| VSS (23) | Negative Supply | –4.95V to –5.25V supply rail; bypass to AGND with 0.1µF ceramic capacitor. |
| VDD (24) | Positive Supply | +4.95V to +5.25V supply rail; bypass to AGND with 10µF tantalum + 0.1µF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Internal synchronized clock | Eliminates external clock routing noise and timing skew; guarantees 2.7µs max conversion time without clock management. |
| On-chip 25ppm/°C reference | Reduces BOM count and layout area by integrating precision reference; avoids drift-induced gain error in field-deployed systems. |
| High-impedance analog input | Supports direct connection to low-current sources (±1µA leakage); minimizes loading on sensor front-ends or op-amp buffers. |
| ESD protection on all pins | Withstands >2kV HBM per JEDEC JESD22-A114; improves robustness during handling and system integration. |
| Parallel 12-bit interface with HBEN | Enables flexible microprocessor interfacing: full-word reads or byte-multiplexed access reduces bus width requirements. |
Applications
| Industrial Data Acquisition | DSP Front-End |
|---|---|
Use Scenario: High-channel-count PLC analog input modules acquiring ±10V sensor signals conditioned to ±5V range. IC Role / Device Role / Timing Role: Primary ADC converting conditioned analog inputs into 12-bit digital words for FPGA preprocessing. Use Value: Guaranteed ±1/2LSB INL ensures <0.012% absolute accuracy across temperature, critical for calibration traceability. | Use Scenario: Real-time audio spectrum analyzer using FFT on sampled signals up to 150kHz. IC Role / Device Role / Timing Role: High-fidelity sampling stage feeding 300ksps data stream to TI C6000 DSP via parallel bus. Use Value: 70dB S/(N+D) at Nyquist enables clean spectral separation of tones within 150kHz bandwidth. |
| Multiplexed Sensor Systems | Telecom Signal Monitoring |
Use Scenario: Multi-sensor environmental monitor switching between thermocouple, strain gauge, and RTD inputs. IC Role / Device Role / Timing Role: Central ADC shared across channels via analog multiplexer; internal clock eliminates inter-channel clock skew. Use Value: Internal synchronized clock removes need for external clock distribution, reducing crosstalk in dense multiplexed layouts. | Use Scenario: Base station receiver monitoring analog IF signals prior to digitization in wireless infrastructure. IC Role / Device Role / Timing Role: Wideband analog capture stage verifying signal integrity and distortion performance pre-DSP. Use Value: –74dB THD at 150kHz confirms low harmonic generation essential for adjacent-channel interference testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320IPW | 2.7V–5.5V single-supply operation; no internal reference; requires external 2.5V ref; 500ksps max rate. | Designed for portable/battery-powered systems; lacks ±5V bipolar input capability. | Select when single-supply operation and higher speed outweigh need for integrated reference and bipolar input. |
| MAX1166BCAP+ | ±5V input supported; internal 2.5V reference; 250ksps max rate; 20-pin TSSOP package. | Lower sampling rate and smaller package; different pinout prevents drop-in replacement. | Select when board space is constrained and 250ksps suffices; verify layout changes due to 20-pin vs 24-pin footprint. |
Compared with ADS8320IPW and MAX1166BCAP+, the LTC1276BCSW#TRPBF uniquely combines ±5V bipolar input, integrated 2.42V reference, and 300ksps throughput in a 24-pin SO Wide package-making it optimal for industrial dual-supply systems where reference stability and input range match legacy signal chains.
Availability
LTC1276BCSW#TRPBF is available at Aetrix Electronics and suitable for industrial instrumentation, DSP front-end design, and telecom signal monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1276BCSW#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1276BCSW#TRPBF belongs to ADI's legacy Linear Technology precision data converter family, engineered for high-speed, high-accuracy acquisition in noise-sensitive environments with minimal external components.
FAQ
What is the operating temperature range for the LTC1276BCSW#TRPBF?
The LTC1276BCSW#TRPBF is specified for commercial operation from 0°C to 70°C. This B-grade temperature range ensures guaranteed DC specifications-including ±1/2LSB INL and ±3/4LSB DNL-across the full interval, making it suitable for indoor industrial and laboratory equipment where ambient conditions are controlled.
Does the LTC1276BCSW#TRPBF require an external clock source?
No, the LTC1276BCSW#TRPBF does not require an external clock. It features an internally trimmed, synchronized clock that automatically aligns with each conversion command (RD pulse), eliminating asynchronous clock noise and simplifying system timing design. The internal clock guarantees a maximum conversion time of 2.7µs at 300ksps.
How is the analog input range configured for the LTC1276BCSW#TRPBF?
The LTC1276BCSW#TRPBF is factory-configured for ±5V bipolar input range. This is achieved by connecting VSS to –4.95V to –5.25V and VDD to +4.95V to +5.25V. Unlike the LTC1273 (0V–5V) or LTC1275 (±2.5V), the LTC1276BCSW#TRPBF's input range is fixed and cannot be reconfigured via pin strapping or register settings.
What decoupling is required for the VREF pin on the LTC1276BCSW#TRPBF?
The VREF pin (Pin 2) of the LTC1276BCSW#TRPBF must be decoupled to AGND using a 10µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor. This dual-capacitor network suppresses both low-frequency drift and high-frequency noise, ensuring stable reference voltage for the internal DAC and maintaining full-scale accuracy under dynamic load conditions.
Can the LTC1276BCSW#TRPBF interface directly with a 3.3V microcontroller?
Yes, but with level-shifting for digital I/O. While the LTC1276BCSW#TRPBF's digital outputs (D11–D0/8) swing from VDD (5V) to DGND, its inputs (CS, RD, HBEN) accept 0.8V/2.4V logic thresholds compatible with 3.3V CMOS. To avoid damage, connect outputs to a 3.3V controller via resistor-divider or level-shifter; inputs may be driven directly from 3.3V GPIOs.
LTC1276BCSW#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1276BCSW#TRPBF FAQ
1.How can I place an order for LTC1276BCSW#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1276BCSW#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 LTC1276BCSW#TRPBF reliable?
The price and inventory of LTC1276BCSW#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1276BCSW#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1276BCSW#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1276BCSW#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1276BCSW#TRPBF?
LTC1276BCSW#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1276BCSW#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 LTC1276BCSW#TRPBF?
For technical support, including LTC1276BCSW#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1276BCSW#TRPBF requirements.
6.How does Aetrix verify that LTC1276BCSW#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1276BCSW#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 LTC1276BCSW#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1276BCSW#TRPBF?
All LTC1276BCSW#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1276BCSW#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 LTC1276BCSW#TRPBF part is unused and in its original packaging.
Return procedure for LTC1276BCSW#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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