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Analog Devices Inc. LTC1290CCSW#PBF
- Part No.:
- LTC1290CCSW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LTC1290CCSW#PBF.pdf
- Description:
- IC DAS/ADC 12BIT 50K 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,160
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Product details
Overview
LTC1290CCSW#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 8-channel serial-output sampling data acquisition system with integrated sample-and-hold, successive approximation ADC, and configurable analog multiplexer. It supports single-ended or differential inputs, ±5V common-mode range, 50kHz max throughput, and operates from single 5V or dual ±5V supplies. It is used in industrial sensor monitoring systems requiring precise multi-channel voltage digitization with microprocessor serial interface.
For engineers reviewing the LTC1290CCSW#PBF datasheet, LTC1290CCSW#PBF pinout, LTC1290CCSW#PBF application, or LTC1290CCSW#PBF equivalent, key selection considerations include its 12-bit resolution with no missing codes guaranteed, software-programmable unipolar/bipolar mode, MSB/LSB-first output format, 12-bit word length option, and 20-lead SO Wide package compatibility with standard PCB layouts for data acquisition subsystems.
Technical Context
The LTC1290CCSW#PBF implements an LTCMOS switched-capacitor SAR architecture with on-chip sample-and-hold for all single-ended channels. Its 8:1 analog multiplexer supports four differential or eight single-ended input configurations, with COM pin defining the zero reference for single-ended measurements.
Serial communication uses a synchronous, full-duplex four-wire interface (CS, SCLK, DIN, DOUT) compatible with MICROWIRE and SPI protocols. Conversion timing is controlled by external ACLK (up to 4MHz), while data transfer is synchronized to SCLK (up to 2MHz); conversion results are delayed by one CS cycle relative to the configuration command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits with no missing codes guaranteed over full temperature range - ensures monotonicity and precision in closed-loop control feedback paths. |
| Input Channels | 8 single-ended or 4 differential inputs - enables flexible signal routing without external multiplexing hardware. |
| Throughput Rate | 50 kHz maximum - supports real-time sampling of fast transients in motor control or power quality monitoring. |
| Supply Voltage | Single 5V or dual ±5V operation - simplifies power design in mixed-signal systems with digital logic rails. |
| Conversion Time | 13 µs maximum over temperature - defines minimum inter-sample interval for high-speed acquisition sequences. |
| Power Consumption | 6.0 mA typical ICC at VCC = 5V; 5–15 µA in power shutdown - enables low-power operation in battery-backed data loggers. |
| Analog Input Range | 0V to 5V (unipolar) or ±5V (bipolar) with ±15V overvoltage tolerance per channel - protects against transient surges in industrial field wiring. |
Pinout & Package
Package: 20-lead plastic SO Wide (SW), 0.300" wide body, RoHS-compliant lead-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Accept single-ended or differential voltage signals; each channel has ≤1 µA leakage current at 25°C, enabling high-impedance sensor interfacing. |
| COM (Pin 9) | Common Reference | Zero-reference point for all single-ended inputs; must be tied directly to clean analog ground plane to avoid measurement offset. |
| DGND (Pin 10) | Digital Ground | Return path for internal logic; isolated from AGND to minimize digital noise coupling into analog conversion. |
| AGND (Pin 11) | Analog Ground | Reference for analog circuitry and REF±; requires star-point connection to DGND only at single point to prevent ground loops. |
| V– (Pin 12) | Negative Supply | Supports bipolar operation down to –6V; tied to GND in unipolar 5V-only systems. |
| REF+ / REF– (Pins 13–14) | Reference Inputs | Define full-scale range; accept 0.05V below V– to 0.05V above VCC - allows external precision references up to 5V. |
| CS (Pin 15) | Chip Select | Active-low enable for serial interface; includes deglitching circuit rejecting noise pulses shorter than one ACLK cycle. |
| DOUT (Pin 16) | Digital Output | Three-state serial output; transitions to Hi-Z when CS is high - permits bus sharing with other serial peripherals. |
| DIN (Pin 17) | Digital Input | Receives 8-bit configuration word (MUX address, UNI, MSBF, WL1/WL0) on first eight rising SCLK edges after CS assertion. |
| SCLK (Pin 18) | Shift Clock | Synchronizes serial data transfer; data latched on rising edge, output valid on falling edge - matches standard MICROWIRE timing. |
| ACLK (Pin 19) | A/D Conversion Clock | Controls SAR conversion timing; minimum 15kHz recommended at 25°C, ≥125kHz at 85°C to limit S/H droop error. |
| VCC (Pin 20) | Positive Supply | Primary power rail; requires local 1µF bypass capacitor to AGND to suppress switching noise affecting ADC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Runtime selection between unipolar (0V–5V) and bipolar (±5V) conversion via DIN bit 4 - eliminates need for external gain/level-shifting circuitry. |
| Programmable data word length | 8-, 12-, or 16-bit output format selectable via DIN bits 0–1 - enables direct alignment with 8-bit microcontroller registers or 16-bit DSP buffers. |
| Integrated sample-and-hold | On-chip S/H for all single-ended channels with ≤0.02% acquisition time error at 1kΩ source impedance - removes requirement for external S/H IC in most applications. |
| Low-power shutdown mode | Reduces supply current to 5–15 µA by setting WL1=0/WL0=1 - extends battery life in portable instrumentation without sacrificing wake-up latency. |
| Four-wire serial interface | Direct hardware compatibility with MICROWIRE, SPI, and parallel-port-emulated serial buses - eliminates level translators or protocol converters in MPU-connected designs. |
Applications
| Industrial Process Monitoring | Motor Control Feedback |
|---|---|
|
Use Scenario: Continuous voltage monitoring of multiple temperature, pressure, and flow sensors across a PLC I/O rack. IC Role / Device Role / Timing Role: 12-bit ADC front-end acquiring synchronized samples from 8 analog field inputs with ±5V range and 50kHz aggregate throughput. Use Value: Eliminates external multiplexer and S/H, reducing BOM count and layout area while maintaining 0.024% full-scale accuracy over 0°C–70°C operating range. |
Use Scenario: Real-time sampling of phase currents and DC bus voltage in a three-phase inverter drive. IC Role / Device Role / Timing Role: Simultaneous capture of motor current sense signals (differential) and bus voltage (single-ended) with programmable bipolar/unipolar scaling. Use Value: Enables precise current vector calculation using 12-bit resolution and <13µs conversion time, critical for field-oriented control loop stability. |
| Portable Data Logger | Lab Equipment Signal Conditioning |
|
Use Scenario: Battery-powered environmental logger recording thermocouple, RTD, and humidity sensor outputs over extended periods. IC Role / Device Role / Timing Role: Low-power data acquisition node with software-selectable input ranges and shutdown mode activated between sampling intervals. Use Value: Achieves >1-year battery life using 5–15 µA shutdown current and eliminates need for external reference or power management ICs. |
Use Scenario: Modular benchtop instrument accepting interchangeable analog input modules for voltage, current, and resistance measurement. IC Role / Device Role / Timing Role: Reconfigurable ADC core supporting both single-ended sensor inputs and differential bridge measurements via MUX programming. Use Value: Reduces module count by 40% through dynamic input topology selection, while 12-bit linearity (±0.5 LSB INL) meets Class II metrology requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200kSPS, SPI-only interface, no built-in S/H, requires external reference. | Higher speed but lacks differential MUX flexibility and on-chip S/H - demands additional support components for equivalent functionality. | Select when throughput >50kSPS is required and board space allows external S/H/reference. |
| MAX120CPD | 12-bit, 100kSPS, parallel + serial interface, ±15V supply capable, no software-configurable unipolar/bipolar mode. | Wider supply range but fixed input polarity - requires external op-amp circuitry to adapt bipolar signals. | Select for legacy 5V/±15V mixed-rail systems where parallel MPU interface is preferred. |
Compared with ADS7822U and MAX120CPD, the LTC1290CCSW#PBF uniquely integrates sample-and-hold, software-selectable input polarity, and differential/single-ended MUX configuration in a single 20-pin SOIC - reducing component count and PCB complexity for mid-speed industrial DAQ systems.
Availability
LTC1290CCSW#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable data logging, and lab equipment signal conditioning requiring stable component supply and long-term production continuity.
Supply support for LTC1290CCSW#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1290CCSW#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for cost-sensitive, space-constrained industrial and instrumentation applications requiring integrated analog front-end functionality without external support components.
FAQ
What is the operating temperature range for the LTC1290CCSW#PBF?
The LTC1290CCSW#PBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix. This commercial-grade specification ensures reliable performance in indoor industrial enclosures and laboratory environments where ambient thermal management is controlled. The device maintains guaranteed 12-bit no-missing-codes operation and ±0.5 LSB INL across this full range.
Does the LTC1290CCSW#PBF require an external reference voltage?
The LTC1290CCSW#PBF accepts an external reference via REF+ and REF– pins but does not require one - it can operate with VCC as the reference in unipolar mode. However, for optimal accuracy and stability, a precision 5V reference (e.g., LT1027) is recommended. The device supports reference voltages from (V–) –0.05V to VCC + 0.05V, enabling flexible sourcing including buffered DAC outputs.
How is differential input configured on the LTC1290CCSW#PBF?
Differential input on the LTC1290CCSW#PBF is configured via the 4-bit MUX address in the 8-bit DIN configuration word. Setting SGL/DIFF = 0 selects differential mode, allowing measurement across adjacent channel pairs (e.g., CH3–CH2). Polarity is determined by ODD/SIGN bits, and the common-mode range remains ±5V - verified by the device's ±15V overvoltage protection on each input pin.
Can the LTC1290CCSW#PBF interface directly with an Arduino or similar MCU?
Yes, the LTC1290CCSW#PBF interfaces directly with Arduino and other MCUs via its 4-wire serial interface. Using the SPI library, configure MOSI as DIN, MISO as DOUT, SCK as SCLK, and any GPIO as CS. Set WL1/WL0 for 12-bit output and UNI=1 for unipolar mode. No level shifters are needed for 5V Arduino systems, as the LTC1290CCSW#PBF's digital inputs tolerate 0–5V logic levels.
What is the purpose of the ACLK pin on the LTC1290CCSW#PBF?
The ACLK pin on the LTC1290CCSW#PBF provides the master clock for the internal successive approximation register and sample-and-hold timing. Unlike SCLK (which controls data transfer), ACLK governs conversion speed and S/H acquisition fidelity. The datasheet specifies a maximum 4MHz ACLK frequency and recommends ≥125kHz at 85°C to prevent S/H droop-induced errors - making ACLK critical for maintaining 12-bit accuracy across temperature.
LTC1290CCSW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V, ±5V
- Voltage - Supply, Digital:
- 5V, ±5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1290CCSW#PBF FAQ
1.How can I place an order for LTC1290CCSW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1290CCSW#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 LTC1290CCSW#PBF reliable?
The price and inventory of LTC1290CCSW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1290CCSW#PBF is usually 5 days.
3.What payment methods are accepted for LTC1290CCSW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1290CCSW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1290CCSW#PBF?
LTC1290CCSW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1290CCSW#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 LTC1290CCSW#PBF?
For technical support, including LTC1290CCSW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1290CCSW#PBF requirements.
6.How does Aetrix verify that LTC1290CCSW#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1290CCSW#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 LTC1290CCSW#PBF meets industry standards.
7.What is the process for return or replacement of LTC1290CCSW#PBF?
All LTC1290CCSW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1290CCSW#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 LTC1290CCSW#PBF part is unused and in its original packaging.
Return procedure for LTC1290CCSW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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