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Analog Devices Inc. LTC2452CDDB#TRPBF
- Part No.:
- LTC2452CDDB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2452CDDB#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,193
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Product details
Overview
LTC2452CDDB#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 LTC2452CDDB#TRPBF datasheet, LTC2452CDDB#TRPBF pinout, LTC2452CDDB#TRPBF application, or LTC2452CDDB#TRPBF equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts for system-level trade-off analysis.
Technical Context
The LTC2452CDDB#TRPBF uses a proprietary delta-sigma modulator with no latency in multiplexed applications and performs continuous internal offset and full-scale calibration transparent to the user. Its architecture eliminates external clock components and enables single-cycle operation with auto shutdown after conversion.
It employs a unique input sampling scheme that reduces average input sampling current to 50nA and ensures negligible DC leakage (<10nA) between IN+ and IN–. The device supports both CPOL = 0 and CPOL = 1 SPI modes and provides 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. |
| Conversion Rate | 60 conversions per second (16.6 ms typical conversion time)-enables real-time sampling without oversampling bottlenecks. |
| Differential Input Range | ±VREF, with VREF = 2.5V to VCC-supports rail-to-rail referenced measurements using external or internally derived reference. |
| Supply Current | 800µA during conversion, <0.2µA in sleep mode-enables microamp-level average power consumption in duty-cycled systems. |
| Integral Nonlinearity | ±1 LSB max over temperature-ensures high-accuracy linearity without post-calibration in industrial temperature ranges. |
| Input Sampling Current | 50nA average-permits direct connection to high-impedance sensors or RC filters without significant loading error. |
| SPI Interface | 3-wire, CPOL configurable, up to 2MHz SCK-simplifies host MCU integration with minimal GPIO usage and flexible timing. |
Pinout & Package
The LTC2452CDDB#TRPBF is housed in an 8-lead, 3mm × 2mm plastic DFN package (DD8) with exposed pad (Pin 9) connected to GND and required to be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCK (Pin 1) | Serial clock input | Synchronizes serial data output; supports idle-high (CPOL=1) or idle-low (CPOL=0) modes for flexible MCU compatibility. |
| GND (Pin 2) | Analog/digital ground | Common return for all signals; exposed pad (Pin 9) must be soldered to PCB ground for thermal and noise performance. |
| REF (Pin 3) | Reference voltage input | Sets full-scale range; accepts 2.5V to VCC; shorting to VCC enables simple single-supply operation. |
| VCC (Pin 4) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF ceramic decoupling for optimal noise immunity. |
| IN– (Pin 5) | Negative differential input | High-impedance node with <10nA DC leakage; forms differential pair with IN+ for common-mode rejection. |
| IN+ (Pin 6) | Positive differential input | Paired with IN–; supports ±VREF differential swing and 31 LSB overrange/underrange capability. |
| CS (Pin 7) | Active-low chip select | Enables SDO output when low; high-Z state when high; used to abort data transfer or trigger new conversion. |
| SDO (Pin 8) | Three-state serial data output | Outputs 16-bit result 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 | Eliminates filter settling delay-enables true one-to-one correspondence between conversion trigger and output data in multiplexed systems. |
| Integrated oscillator | Removes need for external crystal or clock source-reduces BOM count and layout complexity in space-constrained designs. |
| Continuous internal calibration | Performs offset and full-scale correction every conversion-maintains accuracy across temperature and time without user intervention. |
| Ultra-low input sampling current | 50nA average draw-allows direct interfacing with high-Z sources (e.g., thermocouples, RTDs) without buffer amplifiers. |
| Low-power sleep mode | <0.2µA supply current-enables multi-year battery life in wireless sensor nodes with infrequent sampling intervals. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring temperature, humidity, or gas concentration in remote, battery-powered field nodes. IC Role / Device Role / Timing Role: Precision ADC capturing differential sensor outputs (e.g., thermistor bridges) with minimal power overhead. Use Value: 16-bit resolution and ±1 LSB INL ensure sub-degree Celsius accuracy; 0.2µA sleep current extends node lifetime beyond 5 years on coin-cell batteries. |
Use Scenario: Closed-loop feedback in PLC analog I/O modules measuring pressure, flow, or level transmitters. IC Role / Device Role / Timing Role: High-stability front-end digitizer for 4–20mA loop receivers or strain-gauge signal chains. Use Value: Continuous internal calibration maintains <±0.01% FS accuracy over –40°C to 85°C; ±VREF input supports ratiometric sensing with external references. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
Use Scenario: Cold-junction compensation and thermocouple linearization in portable test equipment. IC Role / Device Role / Timing Role: Low-noise, low-drift ADC interfacing directly to thermocouple junctions with cold-junction reference. Use Value: 2.2µVRMS transition noise and <10nA input leakage prevent self-heating errors; overrange capability handles transient thermocouple faults. |
Use Scenario: Replacing legacy 12-bit SAR ADCs in existing instrumentation designs requiring higher resolution without layout changes. IC Role / Device Role / Timing Role: Pin-compatible upgrade path offering 16-bit performance in same 3mm × 2mm DFN footprint. Use Value: Same 8-pin DFN package and SPI interface simplify drop-in replacement; no external clock or calibration circuitry needed. |
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 | 16-bit, I²C interface, 860SPS max, no integrated oscillator, requires external clock or crystal for precision timing. | Best suited for I²C-based microcontrollers with limited SPI resources; lacks sleep current spec below 1µA. | Select when I²C bus availability outweighs ultra-low sleep power needs and when system-level timing control is acceptable. |
| MCP3424-E/ST | 18-bit, I²C interface, 15SPS at 18-bit, internal reference only (2.048V), no external REF pin, 1µA typical sleep current. | Higher resolution but slower; fixed internal reference limits flexibility in ratiometric or wide-VREF applications. | Choose when absolute 18-bit accuracy is prioritized over speed and external reference control. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2452CDDB#TRPBF uniquely combines SPI simplicity, external reference support, sub-µA sleep, and no-latency operation-making it optimal for high-precision, low-power, differential-sensing applications where timing determinism and power budget are critical.
Availability
LTC2452CDDB#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded sensor interface applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LTC2452CDDB#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 maintains its precision analog product lines, including high-performance delta-sigma ADCs, with focus on signal integrity, low power, and robustness in harsh environments.
The LTC2452CDDB#TRPBF belongs to Linear's ultra-low-power, no-latency delta-sigma ADC family designed specifically for battery-operated instrumentation and high-accuracy sensor front-ends where calibration transparency and minimal external components are essential.
FAQ
What is the operating temperature range for the LTC2452CDDB#TRPBF?
The LTC2452CDDB#TRPBF is rated for 0°C to 70°C (Commercial grade). This is confirmed by the "C" suffix in the part number and the Order Information table, which lists LTC2452CDDB#TRPBF under the 0°C to 70°C temperature range. The device uses the DD8 DFN package and is specified for full performance across this range, including guaranteed INL, offset, and gain error parameters.
Does the LTC2452CDDB#TRPBF require an external crystal or clock source?
No, the LTC2452CDDB#TRPBF includes an integrated oscillator and requires no external clock components. This is explicitly stated in the Features section and confirmed in the Applications Information chapter, which notes "Internal Oscillator-No External Components Required." The device operates reliably across its full temperature and supply range using this on-chip timing source.
Can the LTC2452CDDB#TRPBF measure inputs below ground?
Yes, the LTC2452CDDB#TRPBF supports limited underrange operation: it can digitize inputs up to 8 LSB below GND when configured with appropriate reference and common-mode conditions. As documented in the Applications Information section, total overrange + underrange capability is typically 31 LSB, distributed between IN+ and IN–, enabling fault-tolerant measurement near signal boundaries.
What is the maximum SCK frequency supported by the LTC2452CDDB#TRPBF?
The LTC2452CDDB#TRPBF supports an SCK frequency up to 2 MHz, as specified in the Timing Characteristics table under "fSCK Frequency Range." This value applies across the full operating temperature range and ensures reliable serial data transfer when interfacing with standard microcontroller SPI peripherals.
How does the LTC2452CDDB#TRPBF handle calibration during operation?
The LTC2452CDDB#TRPBF performs continuous internal offset and full-scale calibration automatically every conversion cycle. This process is fully transparent to the user and requires no software intervention or timing overhead. As stated in the Description section, it "ensures accuracy over time and over the operating temperature range" without impacting throughput or introducing latency.
LTC2452CDDB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- 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:
- 8-DFN (3x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2452CDDB#TRPBF FAQ
1.How can I place an order for LTC2452CDDB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2452CDDB#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 LTC2452CDDB#TRPBF reliable?
The price and inventory of LTC2452CDDB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2452CDDB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2452CDDB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2452CDDB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2452CDDB#TRPBF?
LTC2452CDDB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2452CDDB#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 LTC2452CDDB#TRPBF?
For technical support, including LTC2452CDDB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2452CDDB#TRPBF requirements.
6.How does Aetrix verify that LTC2452CDDB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2452CDDB#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 LTC2452CDDB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2452CDDB#TRPBF?
All LTC2452CDDB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2452CDDB#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 LTC2452CDDB#TRPBF part is unused and in its original packaging.
Return procedure for LTC2452CDDB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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