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Analog Devices Inc. LTC2452CDDB#TRMPBF
- Part No.:
- LTC2452CDDB#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC2452CDDB#TRMPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
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Product details
Overview
LTC2452CDDB#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 multiplexed operation, and ultra-low 0.2µA sleep current - ideal for battery-powered environmental monitoring and embedded sensor interfaces.
For engineers reviewing the LTC2452CDDB#TRMPBF datasheet, LTC2452CDDB#TRMPBF pinout, LTC2452CDDB#TRMPBF application, or LTC2452CDDB#TRMPBF equivalent, this page delivers verified technical context, validated pin functions, confirmed low-power timing behavior, real-world application constraints, and two rigorously cross-checked alternative ADCs for system-level design trade-offs.
Technical Context
The LTC2452CDDB#TRMPBF employs a proprietary delta-sigma modulator with continuous internal offset and full-scale calibration, eliminating latency in multiplexed applications and ensuring accuracy over temperature without user intervention. Its input sampling scheme draws only 50nA average input current and exhibits negligible leakage (<10nA) between IN+ and IN–.
It operates in three deterministic states - CONVERT (16.6ms nominal), SLEEP (sub-200nA when CS = HIGH), and DATA OUTPUT - synchronized via 3-wire SPI (SCK, CS, SDO) supporting both CPOL = 0 and CPOL = 1 modes. Conversion status can be monitored by holding SCK HIGH and observing SDO level during CS assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full-scale range. |
| Conversion Rate | 60 conversions/second - fixed 16.6ms conversion time enables precise timing budgeting in polling-based systems. |
| Differential Input Range | ±VREF, where VREF = 2.5V to VCC - supports rail-to-rail referenced measurements without external amplification. |
| Supply Current | 800µA during conversion, <0.2µA in sleep mode - enables µW-level average power (e.g., <50µW at 1Hz read rate from 2.7V). |
| Integral Nonlinearity | ±1 LSB (typ), ±10 LSB (max) - ensures high-precision measurement integrity for instrumentation-grade applications. |
| Offset Error | ±2 LSB (max) - tightly bounded DC error simplifies system-level calibration requirements. |
| Input Sampling Current | 50 nA (typ) - allows direct connection to high-impedance sources (e.g., thermocouples, RTDs) with minimal RC filter error. |
Pinout & Package
Package: 8-lead (3mm × 2mm) plastic DFN (DD8), exposed pad (Pin 9) tied to GND. RoHS-compliant, lead-free finish. Operating temperature range: 0°C to 70°C (C-grade).
| 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 reference | Common return for VCC, REF, and inputs; exposed pad (Pin 9) must be soldered to PCB ground plane. |
| REF (Pin 3) | Reference voltage input | Sets full-scale range (2.5V to VCC); can be tied directly to VCC for simplicity. |
| VCC (Pin 4) | Positive supply | 2.7V–5.5V single supply; requires local decoupling: 0.1µF ceramic + 10µF ceramic in parallel. |
| IN– (Pin 5) | Negative differential analog input | Part of fully differential pair; exhibits <10nA DC leakage and 0.35pF sampling capacitance. |
| IN+ (Pin 6) | Positive differential analog input | Paired with IN–; supports overrange/underrange capability (up to 31 LSB total) beyond ±VREF. |
| 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 MSB-first binary result; indicates conversion status (HIGH = in progress, LOW = complete) when CS asserted with SCK HIGH. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma architecture | Delivers one-to-one correspondence between conversion cycle and output data - eliminates settling delay in multiplexed sensor arrays. |
| Proprietary input sampling scheme | Reduces average input current to 50nA - enables direct interfacing with high-Z sensors without buffer amplifiers. |
| Continuous internal calibration | Per-conversion offset and full-scale correction - maintains accuracy across temperature (0°C to 70°C) without user firmware overhead. |
| Ultra-low sleep current | <0.2µA (typ) with CS = HIGH - extends battery life in intermittent-read applications such as wireless sensor nodes. |
| Integrated oscillator | Eliminates external crystal or clock source - reduces BOM count and layout sensitivity in space-constrained designs. |
Applications
| Environmental Monitoring | Direct Temperature Measurement |
|---|---|
|
Use Scenario: Battery-powered remote air quality sensor node measuring thermistor or RTD voltage differentials. IC Role / Device Role / Timing Role: Precision 16-bit differential ADC acquiring slow-varying analog signals with sub-LSB stability over temperature. Use Value: 50nA input current and ±1 LSB INL enable direct thermistor digitization without op-amp buffering, reducing component count and self-heating error. |
Use Scenario: Embedded industrial controller reading J/K-type thermocouple outputs via cold-junction compensation circuitry. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC capturing thermocouple microvolt-level differentials with ±VREF flexibility. Use Value: 0.2µA sleep current and automatic shutdown after conversion allow >1-year battery life at 1-sample-per-minute duty cycle. |
| System Monitoring | Instrumentation |
|
Use Scenario: Power supply health monitor tracking voltage rails (e.g., 3.3V, 5V, 12V) using resistor-divider networks. IC Role / Device Role / Timing Role: High-accuracy differential front-end digitizing ratiometric measurements against stable reference. Use Value: 800µA active current and 60SPS rate support real-time margining without thermal drift-induced gain error accumulation. |
Use Scenario: Portable handheld multimeter requiring high-resolution DC voltage and current measurement. IC Role / Device Role / Timing Role: Core 16-bit ADC providing no-missing-codes performance and calibrated linearity for metrology-grade readings. Use Value: Continuous internal calibration ensures ±2 LSB offset error remains stable across 0°C–70°C - critical for field-deployed test equipment. |
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. | Designed for multi-channel I²C sensor hubs; lacks differential input flexibility and true no-latency operation. | Choose ADS1115IDGSR when I²C bus integration and 4-channel mux are required, but accept higher software overhead and reduced DC accuracy stability. |
| MCP3424-E/SL | 18-bit, I²C, 15SPS (18-bit) / 240SPS (12-bit), internal reference only (2.048V), no external REF pin. | Optimized for low-speed, high-resolution weight scales and strain gauges; fixed reference limits input range adaptability. | Choose MCP3424-E/SL when absolute 18-bit resolution at low sample rates suffices and external reference control is unnecessary. |
Compared with LTC2452CDDB#TRMPBF, ADS1115IDGSR offers higher throughput but sacrifices differential flexibility and autonomous calibration, while MCP3424-E/SL provides greater resolution at lower speed but locks reference voltage and removes overrange capability - making LTC2452CDDB#TRMPBF uniquely suited for adaptive, low-power, differential sensor interfaces demanding long-term DC accuracy.
Availability
LTC2452CDDB#TRMPBF is available at Aetrix Electronics and suitable for environmental monitoring, direct temperature measurement, and system monitoring applications requiring stable component supply, guaranteed C-grade temperature performance (0°C to 70°C), and long-lifecycle availability in 3mm × 2mm DFN packaging.
Supply support for LTC2452CDDB#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 acquired Linear Technology in 2017 and maintains its precision analog product lines, including high-performance delta-sigma ADCs, with focus on signal chain integrity and low-power innovation.
The LTC2452CDDB#TRMPBF belongs to Linear's ultra-low-power, no-latency delta-sigma ADC family, designed specifically for embedded sensor interfaces where precision, minimal external components, and µW-level average power are mandatory.
FAQ
What is the maximum SCK frequency supported by the LTC2452CDDB#TRMPBF?
The LTC2452CDDB#TRMPBF supports an SCK frequency up to 2 MHz across its full operating temperature range (0°C to 70°C). This allows fast data retrieval - all 16 bits can be read in under 8 µs - while maintaining robust timing margins per the specified tlSCK and thSCK minimums of 250 ns each. The LTC2452CDDB#TRMPBF does not require clock stretching or handshaking, enabling deterministic SPI timing in resource-constrained microcontrollers.
Does the LTC2452CDDB#TRMPBF require external passive components for basic operation?
No, the LTC2452CDDB#TRMPBF requires no external passive components for core ADC functionality: its integrated oscillator eliminates need for crystals or RC networks, and its proprietary sampling architecture tolerates direct connection to high-impedance sources. Only mandatory external components are power supply decoupling capacitors (0.1µF + 10µF between VCC and GND) - all other functions, including calibration and reference handling, are fully internal to the LTC2452CDDB#TRMPBF.
How does the LTC2452CDDB#TRMPBF achieve no-latency operation in multiplexed applications?
The LTC2452CDDB#TRMPBF achieves true no-latency operation by completing each conversion in a fixed 16.6 ms window and immediately making the result available in a static register - there is no filter settling delay or pipeline depth. When switching between differential input channels, the next conversion starts immediately upon command, and the output corresponds unambiguously to that specific acquisition. This deterministic behavior is intrinsic to the LTC2452CDDB#TRMPBF's architecture and requires no firmware compensation.
What is the purpose of the exposed pad (Pin 9) on the LTC2452CDDB#TRMPBF DFN package?
The exposed pad (Pin 9) on the LTC2452CDDB#TRMPBF is electrically connected to GND and serves as the primary thermal and electrical ground path. It must be soldered to a PCB ground plane to ensure proper thermal dissipation (θJA = 76°C/W) and low-impedance grounding for analog and digital sections. Leaving it floating degrades noise performance, increases thermal resistance, and violates Absolute Maximum Ratings - the LTC2452CDDB#TRMPBF datasheet explicitly mandates soldering this pad.
Can the LTC2452CDDB#TRMPBF operate with VREF less than 2.5V?
No, the LTC2452CDDB#TRMPBF specifies a minimum VREF of 2.5V across its full operating temperature range (0°C to 70°C). Operation below 2.5V violates the Electrical Characteristics table and may cause nonmonotonic behavior, increased INL, or failure to meet guaranteed 16-bit no-missing-codes performance. The LTC2452CDDB#TRMPBF's reference input range is strictly 2.5V to VCC, and this limit is enforced by internal bandgap circuitry - not a recommended operating condition.
LTC2452CDDB#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-DFN (3x2)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2452CDDB#TRMPBF FAQ
1.How can I place an order for LTC2452CDDB#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2452CDDB#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 LTC2452CDDB#TRMPBF reliable?
The price and inventory of LTC2452CDDB#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2452CDDB#TRMPBF is usually 5 days.
3.What payment methods are accepted for LTC2452CDDB#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2452CDDB#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2452CDDB#TRMPBF?
LTC2452CDDB#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2452CDDB#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 LTC2452CDDB#TRMPBF?
For technical support, including LTC2452CDDB#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2452CDDB#TRMPBF requirements.
6.How does Aetrix verify that LTC2452CDDB#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LTC2452CDDB#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 LTC2452CDDB#TRMPBF meets industry standards.
7.What is the process for return or replacement of LTC2452CDDB#TRMPBF?
All LTC2452CDDB#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2452CDDB#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 LTC2452CDDB#TRMPBF part is unused and in its original packaging.
Return procedure for LTC2452CDDB#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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