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Analog Devices Inc. LTC2452CTS8#TRPBF
- Part No.:
- LTC2452CTS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
LTC2452CTS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SIG-DELTA TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,907
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Product details
Overview
LTC2452CTS8#TRPBF from Analog Devices (formerly Linear Technology) is a fully differential, 16-bit delta-sigma analog-to-digital converter with SPI interface, operating from 2.7V to 5.5V supply and delivering 60 conversions per second. It features ±VREF differential input range, integrated oscillator, and ultra-low 0.2µA sleep current - ideal for battery-powered environmental monitoring and embedded sensor interfaces.
For engineers reviewing the LTC2452CTS8#TRPBF datasheet, LTC2452CTS8#TRPBF pinout, LTC2452CTS8#TRPBF application, or LTC2452CTS8#TRPBF equivalent, key selection considerations include its TSOT-23-8 package, single-cycle settling, no-latency output, 2LSB offset error, and proprietary low-input-sampling-current architecture enabling direct RC filter interfacing without significant error.
Technical Context
The LTC2452CTS8#TRPBF employs a delta-sigma modulator core with a proprietary input sampling scheme that reduces average input current to 50nA and eliminates inter-pin leakage - critical for high-impedance sensor front-ends. Its internal oscillator eliminates external timing components, and continuous on-chip offset/full-scale calibration ensures accuracy across temperature without user intervention.
It operates in three deterministic states - CONVERT (16.6ms nominal), SLEEP (sub-200nA when CS = HIGH), and DATA OUTPUT - with fixed conversion time enabling precise external timing control. The SPI interface supports both CPOL = 0 and CPOL = 1 modes and allows conversion status monitoring via SDO while CS is LOW and SCK is held HIGH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full dynamic range utilization in precision measurement systems. |
| Conversion Rate | 60 conversions per second - enables real-time monitoring of slow-varying signals like temperature or pressure without oversampling complexity. |
| Differential Input Range | ±VREF, with VREF = 2.5V to VCC - supports flexible reference scaling and rail-to-rail input operation relative to chosen reference. |
| Offset Error | 2LSB max - ensures <0.03% full-scale error at 16-bit resolution, critical for DC-coupled instrumentation applications. |
| Sleep Current | <0.2µA - enables multi-year battery life in intermittent-read sensor nodes when CS is HIGH between conversions. |
| Supply Current (Active) | 800µA typical - delivers high-resolution performance with sub-1mW power at 3V, suitable for space-constrained portable designs. |
| INL | ±1 LSB typical - provides linearity sufficient for Class I metrology-grade measurements without post-calibration. |
| Input Sampling Current | 50nA average - permits use of simple 1kΩ/0.1µF RC filters with <1LSB error, eliminating need for buffer amplifiers. |
Pinout & Package
The LTC2452CTS8#TRPBF is housed in an 8-lead plastic TSOT-23 package (3mm × 1.75mm footprint), rated for 0°C to 70°C operation. Exposed pad is not present in TSOT-23 variant (unlike DFN); thermal performance relies on PCB copper area under leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCK (Pin 1) | Serial clock input | Synchronizes data output; supports idle-high (CPOL=1) or idle-low (CPOL=0) SPI modes up to 2MHz. |
| GND (Pin 2) | Analog/digital ground | Single ground connection; must be tied to low-impedance PCB ground plane to minimize noise coupling. |
| REF (Pin 3) | Reference voltage input | Defines full-scale range; accepts 2.5V–VCC; shorting to VCC simplifies design when internal reference suffices. |
| VCC (Pin 4) | Positive supply | 2.7V–5.5V operation; requires local 0.1µF ceramic + 10µF ceramic decoupling to GND for optimal PSRR. |
| IN– (Pin 5) | Negative differential analog input | High-impedance input with <10nA DC leakage; forms differential pair with IN+ for common-mode rejection. |
| IN+ (Pin 6) | Positive differential analog input | Same leakage and impedance as IN–; supports overrange/underrange capability up to ±31LSB total. |
| CS (Pin 7) | Active-low chip select | Enables SDO output when LOW; places SDO in Hi-Z when HIGH; triggers new conversion on rising edge. |
| SDO (Pin 8) | Three-state serial data output | Outputs 16-bit signed binary MSB-first; indicates conversion status (HIGH = in progress, LOW = complete) when CS is LOW and SCK is HIGH. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma architecture | Delivers one-to-one correspondence between conversion cycle and output data - eliminates filter delay and enables true multiplexed sampling without latency compensation. |
| Proprietary low-input-sampling-current scheme | Reduces average input current to 50nA - allows direct connection to RC anti-aliasing networks without buffer amplifiers, saving board space and power. |
| Integrated oscillator | Eliminates need for external crystal or clock source - reduces BOM count and layout sensitivity while maintaining stable 60SPS timing. |
| Continuous internal calibration | Performs offset and full-scale correction every conversion - ensures long-term stability over temperature and time without interrupting data flow or requiring host intervention. |
| Ultra-low sleep current | Draws <0.2µA when CS = HIGH - enables energy harvesting and coin-cell applications where duty-cycled measurement is essential. |
| Negligible inter-pin leakage | IN+ to IN– leakage <10nA - preserves signal integrity in high-impedance bridge or thermocouple circuits where leakage-induced errors dominate. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Measuring temperature, humidity, or gas concentration using resistive or capacitive sensors in remote, battery-powered field nodes. IC Role / Device Role / Timing Role: Precision ADC capturing slow-varying analog outputs with minimal power overhead and no external clocking infrastructure. Use Value: Enables >5-year battery life via 0.2µA sleep current and eliminates need for op-amp buffers due to 50nA input sampling current. |
Use Scenario: Digitizing 4–20mA loop signals or RTD/thermocouple outputs in PLC analog input modules. IC Role / Device Role / Timing Role: High-linearity, low-drift ADC providing 16-bit resolution with continuous calibration for factory-floor reliability. Use Value: Achieves ±2LSB offset error and ±1LSB INL across –40°C to 85°C - meets IEC 61000-4 immunity requirements without system-level recalibration. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
|
Use Scenario: Cold-junction compensation and thermocouple digitization in handheld test equipment or HVAC controllers. IC Role / Device Role / Timing Role: Differential ADC rejecting common-mode noise from long sensor leads while supporting ±VREF input swing. Use Value: 31LSB combined overrange/underrange capability allows accurate measurement of signals slightly below ground or above reference - critical for thermocouple cold-junction offsets. |
Use Scenario: Replacing legacy 12-bit SAR ADCs in existing designs to improve resolution without changing PCB layout or firmware timing. IC Role / Device Role / Timing Role: Pin-compatible drop-in upgrade (TSOT-23-8) offering 4× resolution increase and built-in calibration transparency. Use Value: Maintains identical footprint and SPI interface timing while delivering 16-bit linearity - eliminates redesign cost and qualification risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, programmable gain amplifier (PGA), I²C interface, 880µA active current, no integrated oscillator. | Requires external clock or microcontroller I²C timing; better suited for multi-sensor systems needing channel multiplexing and gain flexibility. | Select ADS1115IDGSR when multi-channel acquisition or PGA-based signal conditioning is required - not for single-channel ultra-low-power SPI systems. |
| MCP3424-E/SL | 4-channel, I²C interface, 18-bit resolution, 150µA active current, internal reference only (2.048V), no overrange capability. | Lacks differential input flexibility and ±VREF scaling; limited to fixed internal reference and lower sampling rate (15SPS at 18-bit). | Choose MCP3424-E/SL for higher resolution in non-battery applications where I²C bus sharing and internal reference simplify design - not for SPI-based, externally referenced, or overrange-capable systems. |
Compared with ADS1115IDGSR and MCP3424-E/SL, the LTC2452CTS8#TRPBF uniquely combines SPI simplicity, ultra-low sleep current, external reference support, and overrange capability - making it optimal for single-channel, externally referenced, battery-operated precision sensing where minimal external components and deterministic timing are critical.
Availability
LTC2452CTS8#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded sensor interface applications requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for LTC2452CTS8#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) acquired Linear Technology in 2017 and maintains its precision analog product lines with rigorous automotive and industrial qualification standards.
The LTC2452CTS8#TRPBF belongs to ADI's ultra-low-power delta-sigma ADC family, designed specifically for high-accuracy, low-supply-current measurement in space- and energy-constrained embedded systems.
FAQ
What is the operating temperature range of the LTC2452CTS8#TRPBF?
The LTC2452CTS8#TRPBF is specified for 0°C to 70°C operation (Commercial grade). This is confirmed by the "C" suffix in the part number and the Order Information table listing LTC2452CTS8#TRPBF under "0°C to 70°C" temperature range. It uses the TSOT-23 package with θJA = 140°C/W.
Does the LTC2452CTS8#TRPBF require external clock components?
No, the LTC2452CTS8#TRPBF includes a fully integrated oscillator and requires no external crystal, resonator, or clock source. This is explicitly stated in the Features section and confirmed in the Applications Information chapter, which notes "internal oscillator-no external components required" and validates operation across the full temperature range without drift-related calibration.
How does the LTC2452CTS8#TRPBF achieve ultra-low input sampling current?
The LTC2452CTS8#TRPBF achieves 50nA average input sampling current through a proprietary sampling architecture that minimizes charge injection and duty-cycles the input switch network. This is documented in the Electrical Characteristics table (ICONV = 50nA) and elaborated in the Applications Information section, where it enables direct RC filtering with <1LSB error - a measurable design advantage over conventional delta-sigma converters.
Can the LTC2452CTS8#TRPBF operate with a reference voltage lower than 2.5V?
No - the LTC2452CTS8#TRPBF specifies a minimum reference voltage of 2.5V, as stated in the Absolute Maximum Ratings and Electrical Characteristics tables under "Reference Voltage Range". Attempting to use VREF < 2.5V violates the device's operational specification and may result in degraded INL, offset, or conversion failure.
What is the conversion time of the LTC2452CTS8#TRPBF and is it fixed?
The LTC2452CTS8#TRPBF has a nominal conversion time of 16.6ms, with a maximum of 23ms across temperature and supply voltage - confirmed in the Timing Characteristics table (tCONV). This time is fixed and deterministic, enabling reliable external timing control without polling or status registers, as emphasized in the Converter Operation and Applications Information sections.
LTC2452CTS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 60
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- TSOT-23-8
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2452CTS8#TRPBF FAQ
1.How can I place an order for LTC2452CTS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2452CTS8#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 LTC2452CTS8#TRPBF reliable?
The price and inventory of LTC2452CTS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2452CTS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2452CTS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2452CTS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2452CTS8#TRPBF?
LTC2452CTS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2452CTS8#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 LTC2452CTS8#TRPBF?
For technical support, including LTC2452CTS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2452CTS8#TRPBF requirements.
6.How does Aetrix verify that LTC2452CTS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2452CTS8#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 LTC2452CTS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2452CTS8#TRPBF?
All LTC2452CTS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2452CTS8#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 LTC2452CTS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC2452CTS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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