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Analog Devices Inc. LTC2452IDDB#TRMPBF
- Part No.:
- LTC2452IDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2452IDDB#TRMPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:791
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Product details
Overview
LTC2452IDDB#TRMPBF 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, delivering 60 conversions per second and ±VREF differential input range. It features integrated oscillator, no-latency operation, and ultra-low 0.2µA sleep current-ideal for battery-powered environmental monitoring and embedded sensor interfaces.
For engineers reviewing the LTC2452IDDB#TRMPBF datasheet, LTC2452IDDB#TRMPBF pinout, LTC2452IDDB#TRMPBF application, or LTC2452IDDB#TRMPBF equivalent, this page provides verified technical context, validated pin functions, confirmed low-power timing behavior, real-world calibration transparency, and precise package mapping for DFN-8 (3mm × 2mm) with exposed pad.
Technical Context
The LTC2452IDDB#TRMPBF uses a proprietary delta-sigma modulator with continuous internal offset and full-scale calibration, ensuring accuracy over –40°C to +85°C without user intervention. Its single-cycle conversion settling enables true multiplexed sampling with no latency or filter delay.
It implements a unique input sampling scheme that reduces average input current to 50nA and eliminates inter-pin leakage (<10nA between IN+ and IN–), enabling direct RC filtering with <1LSB error using 1kΩ/0.1µF networks. The internal oscillator eliminates external timing components, and SPI communication supports both CPOL = 0 and CPOL = 1 modes.
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 sps (16.6 ms typical)-enables stable readings for slow-varying signals like temperature or pressure without oversampling overhead. |
| Differential Input Range | ±VREF, with VREF = 2.5V to VCC-supports rail-to-rail referenced measurements and allows VREF = VCC for simplified supply architecture. |
| Supply Current | 800 µA during conversion, <0.2 µA in sleep-enables microamp-level system power budgeting for always-on sensing nodes. |
| INL Error | ±1 LSB (typ), ±10 LSB (max)-ensures high linearity for instrumentation-grade applications without post-calibration. |
| Offset Error | ±2 LSB (max)-minimizes zero-point drift across temperature, critical for DC-coupled sensor front-ends. |
| Input Sampling Current | 50 nA (avg)-permits high-impedance source interfacing (e.g., thermocouples, RTDs) without significant signal attenuation. |
Pinout & Package
Package: 8-lead plastic DFN (3mm × 2mm), exposed pad (Pin 9) connected to GND. RoHS-compliant, lead-free finish. Thermal resistance θJA = 76°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCK (Pin 1) | Serial clock input | Synchronizes data output; supports idle-high (CPOL=1) and idle-low (CPOL=0) SPI modes; tLSCK/tHSCK ≥ 250 ns. |
| GND (Pin 2) | Analog/digital ground reference | Common return for all analog and digital circuitry; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| REF (Pin 3) | Reference voltage input | Sets full-scale range (±VREF); accepts 2.5V to VCC; <10 nA leakage ensures stable reference loading. |
| VCC (Pin 4) | Positive supply | 2.7V–5.5V operation; requires local decoupling: 0.1 µF ceramic (closest) + 10 µF ceramic in parallel. |
| IN– (Pin 5) | Negative differential analog input | Paired with IN+ for fully differential measurement; <10 nA DC leakage preserves common-mode rejection. |
| IN+ (Pin 6) | Positive differential analog input | Accepts input up to ±VREF; proprietary sampling reduces average current to 50 nA-enables direct RC anti-aliasing. |
| CS (Pin 7) | Active-low chip select | Enables SDO output when LOW; HIGH places SDO in Hi-Z; controls entry into DATA OUTPUT state and initiates new conversion on rising edge. |
| SDO (Pin 8) | Three-state serial data output | Outputs 16-bit MSB-first result; 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 | Single-cycle settling eliminates filter delay-enables true time-multiplexed sampling of multiple sensors without phase misalignment. |
| Continuous internal calibration | Automatic offset and full-scale correction every conversion-maintains accuracy over temperature and time without interrupting operation or requiring host intervention. |
| Ultra-low input sampling current | 50 nA average draw-allows use with high-impedance sources (e.g., pH electrodes, thermistors) and simplifies anti-aliasing design. |
| Integrated oscillator | No external crystal or RC network required-reduces BOM count, board space, and startup timing uncertainty. |
| Deep sleep mode | 0.2 µA supply current with CS = HIGH-extends battery life in intermittent-read applications such as wireless sensor nodes. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Measuring temperature, humidity, and gas concentration in remote field deployments with coin-cell or energy-harvesting power. IC Role / Device Role / Timing Role: Precision ADC front-end converting sensor outputs to digital values at 60 sps with minimal power overhead. Use Value: 0.2 µA sleep current and 50 nA input bias enable multi-year operation; ±1 LSB INL ensures traceable calibration across temperature. |
Use Scenario: Monitoring pressure, flow, and level in PLC I/O modules where long-term stability and noise immunity are critical. IC Role / Device Role / Timing Role: High-accuracy, low-drift ADC for 4–20 mA loop receivers and isolated sensor interfaces. Use Value: Continuous internal calibration maintains ±2 LSB offset error over –40°C to +85°C; differential inputs reject common-mode noise in industrial EMI environments. |
| Direct Temperature Measurements | Embedded ADC Upgrades |
|
Use Scenario: Cold-junction compensation and thermocouple digitization in portable test equipment with limited PCB area. IC Role / Device Role / Timing Role: Low-power, small-footprint ADC replacing legacy 12-bit parts while adding differential input and auto-calibration. Use Value: 3mm × 2mm DFN package saves >60% board space vs SOIC-8 alternatives; ±VREF input range accommodates wide thermocouple output spans. |
Use Scenario: Retrofitting legacy microcontroller-based systems with higher-resolution analog acquisition without redesigning layout or firmware timing. IC Role / Device Role / Timing Role: Drop-in SPI-compatible ADC upgrade providing 16-bit resolution, no-latency operation, and simplified power sequencing. Use Value: Single-cycle conversion and fixed 16.6 ms timing eliminate need for complex polling or interrupt handling; 3-wire interface reuses existing GPIO resources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IRUGT | 16-bit, I²C interface, 860 sps max, no internal oscillator, requires external reference. | Better suited for multi-node I²C bus systems; lacks sleep current <1 µA and differential input flexibility of LTC2452IDDB#TRMPBF. | Select if I²C infrastructure exists and higher throughput is needed; avoid if ultra-low sleep power or SPI-only interface is required. |
| MCP3424-E/SL | 18-bit, I²C, 15 sps (18-bit), internal 2.048V reference, no sleep mode, 14-pin SOIC package. | Higher resolution but slower and larger; no deep sleep mode limits battery lifetime; fixed reference restricts input range flexibility. | Choose for static high-resolution lab measurements; not recommended for portable or multiplexed field sensors due to speed and power limitations. |
Compared with ADS1115IRUGT and MCP3424-E/SL, the LTC2452IDDB#TRMPBF uniquely combines SPI simplicity, sub-µA sleep, differential ±VREF input scaling, and continuous calibration-making it optimal for compact, battery-constrained, high-stability sensor nodes.
Availability
LTC2452IDDB#TRMPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded sensor interface applications requiring stable component supply, guaranteed long-term availability, and consistent parametric performance across production lots.
Supply support for LTC2452IDDB#TRMPBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2452IDDB#TRMPBF belongs to Linear's ultra-low-power delta-sigma ADC family, designed specifically for precision, low-power, space-constrained measurement systems in industrial, medical, and environmental applications.
FAQ
What is the operating temperature range of the LTC2452IDDB#TRMPBF?
The LTC2452IDDB#TRMPBF is rated for –40°C to +85°C (I-grade), making it suitable for industrial and outdoor embedded applications. This range is validated across all key specifications including INL, offset error, and supply current-no derating required within these limits. The device uses internal calibration to maintain accuracy across the full span, and thermal resistance (θJA = 76°C/W) supports reliable operation with standard PCB copper pour.
Does the LTC2452IDDB#TRMPBF require an external crystal or oscillator?
No, the LTC2452IDDB#TRMPBF integrates a precision internal oscillator and requires no external timing components. This eliminates BOM cost, board space, and startup variability associated with crystals or RC networks. The oscillator enables immediate conversion upon power-up and supports fixed 16.6 ms conversion time-critical for deterministic timing in sensor polling loops.
How does the LTC2452IDDB#TRMPBF achieve ultra-low input bias current?
The LTC2452IDDB#TRMPBF uses a proprietary input sampling architecture that reduces average input current to just 50 nA-several orders of magnitude lower than conventional delta-sigma ADCs. This is achieved through optimized charge redistribution and gated sampling phases, enabling direct interface with high-impedance sensors (e.g., thermistors, pH probes) without buffer amplifiers or additional error compensation.
Can the LTC2452IDDB#TRMPBF operate with VREF = VCC?
Yes, the LTC2452IDDB#TRMPBF supports VREF from 2.5V to VCC, and shorting REF to VCC is a valid and commonly used configuration. This simplifies design by eliminating a separate reference IC, while still maintaining ±VREF differential input range and full 16-bit performance-provided VCC is stable and well-decoupled per datasheet guidelines.
What is the significance of "no latency" in the LTC2452IDDB#TRMPBF datasheet?
"No latency" means the LTC2452IDDB#TRMPBF delivers each conversion result with single-cycle settling-there is no filter group delay or pipeline delay. The output corresponds exactly to the sampled input window, enabling true time-multiplexed acquisition across multiple channels without phase skew or interpolation artifacts. This is essential for synchronized sensor arrays and closed-loop control feedback paths.
LTC2452IDDB#TRMPBF 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-DFN (3x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2452IDDB#TRMPBF FAQ
1.How can I place an order for LTC2452IDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2452IDDB#TRMPBF 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 LTC2452IDDB#TRMPBF reliable?
The price and inventory of LTC2452IDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2452IDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2452IDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2452IDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2452IDDB#TRMPBF?
LTC2452IDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2452IDDB#TRMPBF 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 LTC2452IDDB#TRMPBF?
For technical support, including LTC2452IDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2452IDDB#TRMPBF requirements.
6.How does Aetrix verify that LTC2452IDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2452IDDB#TRMPBF 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 LTC2452IDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2452IDDB#TRMPBF?
All LTC2452IDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2452IDDB#TRMPBF, 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 LTC2452IDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2452IDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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