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Analog Devices Inc. LTC2364IDE-18#PBF
- Part No.:
- LTC2364IDE-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2364IDE-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,427
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Product details
Overview
LTC2364IDE-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 250ksps pseudo-differential unipolar successive approximation register (SAR) ADC operating from a single 2.5V supply. It delivers 97dB typical SNR, ±2.5LSB maximum INL, and guaranteed no missing codes at full 18-bit resolution, with VREF support from 2.5V to 5.1V. It is engineered for high-speed, low-power data acquisition in portable instrumentation and industrial process control.
For engineers reviewing the LTC2364IDE-18#PBF datasheet, LTC2364IDE-18#PBF pinout, LTC2364IDE-18#PBF application, or LTC2364IDE-18#PBF equivalent, key selection criteria include its 250ksps throughput with zero cycle latency, internal conversion clock eliminating external timing constraints, and dual-supply flexibility (2.5V VDD + 1.8V–5V OVDD) enabling direct interfacing with mixed-voltage digital systems.
Technical Context
The LTC2364IDE-18#PBF implements a charge-redistribution SAR architecture with a pseudo-differential input stage, where IN+ accepts 0V to VREF and IN– operates as a ground-sense node with ±100mV range. Its internal oscillator fixes conversion time at 1.9–3µs, ensuring deterministic timing without external clock dependencies.
It features SPI-compatible serial I/O supporting daisy-chain mode, 1.8V–5V logic-level compatibility via OVDD, and automatic power-down between conversions-reducing current draw to 0.9µA in shutdown while maintaining full 18-bit linearity across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 discrete output levels for high dynamic range measurement |
| Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz Nyquist bandwidth |
| SNR (fIN = 2kHz) | 97dB typical - corresponds to ~12.8 effective bits (ENOB) under standard test conditions |
| INL (max) | ±2.5LSB - ensures monotonicity and <0.004% full-scale error over temperature |
| Power (250ksps) | 3.4mW total - achieved with 1.36mA VDD current and 0.9mA OVDD current at 2.5V/2.5V |
| VREF Range | 2.5V to 5.1V - allows flexible scaling of input range without external gain stages |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade reliability in embedded systems |
Pinout & Package
Package: 16-lead (4mm × 3mm) plastic DFN with exposed pad (Pin 17), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode selector | High enables daisy-chain SPI mode; low enables RDL/SDI bus-enable function |
| VDD (2) | Analog supply | 2.5V ±62.5mV supply powering core ADC and reference buffer |
| GND (3,6,10,16) | Analog/digital ground | Multiple dedicated GND pins minimize ground bounce and improve PSRR |
| IN+ (4) | Pseudo-differential input | Accepts 0V to VREF signal; sampled via 45pF capacitor and 40Ω switch during acquisition |
| IN– (5) | Ground sense reference | ±100mV range relative to GND; must connect to system ground or remote sense point |
| REF (7,8) | Reference input | Dual-pin connection for low-impedance decoupling with 47µF X5R ceramic capacitor |
| CNV (9) | Convert trigger | Rising edge initiates acquisition and conversion; also powers up device from shutdown |
| BUSY (11) | Status indicator | Active-high open-drain output signaling conversion in progress |
| RDL/SDI (12) | Serial interface control/data | Function depends on CHAIN state: bus enable (low) or SDI (high) |
| SCK (13) | Serial clock input | Supports up to 100MHz SCK frequency; timing-critical for data capture alignment |
| SDO (14) | Serial data output | MSB-first straight-binary output; valid within 9.5ns of SCK↑ (CL = 20pF) |
| OVDD (15) | I/O supply | 1.71V–5.25V logic supply enabling direct interface to 1.8V/2.5V/3.3V/5V controllers |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Zero-cycle latency enables deterministic real-time control loop response |
| Internal conversion clock | Eliminates need for external timing circuitry and reduces board layout complexity |
| Auto power-down | Reduces quiescent current to 0.9µA between conversions, scaling power with sample rate |
| SPI daisy-chain mode | Enables multi-ADC synchronization with single SCK/SCKCH and shared CNV timing |
| 1.8V–5V I/O compatibility | OVDD independence allows seamless integration into heterogeneous voltage-domain systems |
Applications
| Medical Imaging Signal Chain | Portable Data Logger |
|---|---|
Use Scenario: Digitizing low-noise analog outputs from ultrasound beamformer channels or MRI gradient amplifiers. IC Role / Device Role / Timing Role: High-resolution, low-latency SAR ADC capturing transient waveforms with minimal harmonic distortion. Use Value: 97dB SNR and –120dB THD preserve signal fidelity for accurate image reconstruction and artifact suppression. | Use Scenario: Battery-powered environmental sensor node acquiring temperature, pressure, and gas concentration over extended periods. IC Role / Device Role / Timing Role: Low-power, precision ADC performing burst-mode sampling triggered by event detection. Use Value: 3.4mW active power and 0.9µA shutdown current extend battery life while maintaining 18-bit resolution. |
| Industrial Process Controller | Automated Test Equipment (ATE) |
Use Scenario: Closed-loop feedback acquisition in PLC analog I/O modules monitoring motor current, voltage, and position sensors. IC Role / Device Role / Timing Role: Deterministic 250ksps ADC with zero-latency conversion for real-time PID computation. Use Value: ±2.5LSB INL and guaranteed no missing codes ensure measurement repeatability across temperature and supply variations. | Use Scenario: High-channel-count ATE system requiring synchronized multi-channel digitization of DUT responses. IC Role / Device Role / Timing Role: SPI daisy-chainable ADC enabling precise inter-channel timing alignment via shared CNV and BUSY signals. Use Value: Daisy-chain mode reduces controller GPIO count and simplifies PCB routing for dense channel layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, 2.5V supply only, no daisy-chain mode, 92dB SNR | Higher speed but lower resolution and no multi-ADC synchronization capability | Select when >1MSPS sampling is required and 16-bit ENOB suffices |
| AD7606C-18BSTZ | 8-channel simultaneous-sampling, 2.5V/3.3V dual supply, 100ksps per channel, 95.5dB SNR | Integrated analog front-end with PGA and anti-aliasing filter; higher power (44mW) | Select for multi-channel synchronized acquisition without external multiplexing |
Compared with ADS8860IDRCT and AD7606C-18BSTZ, the LTC2364IDE-18#PBF uniquely balances 18-bit precision, 250ksps throughput, ultra-low power, and daisy-chain flexibility-making it optimal for compact, battery-aware, or multi-ADC synchronized designs where resolution and timing determinism are critical.
Availability
LTC2364IDE-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, portable data loggers, and industrial process controllers requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC2364IDE-18#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2364IDE-18#PBF belongs to ADI's legacy Linear Technology precision SAR ADC product line, designed specifically for applications demanding high resolution, low power, and deterministic timing in space-constrained or thermally sensitive environments.
FAQ
What is the absolute maximum VREF voltage for the LTC2364IDE-18#PBF?
The absolute maximum VREF voltage for the LTC2364IDE-18#PBF is 6V, though the recommended operating range is 2.5V to 5.1V. Exceeding 6V may cause permanent damage. The device guarantees full 18-bit performance across the 2.5V–5.1V range, with SNR degrading slightly at the lower end (91.5dB typical at 2.5V VREF vs. 97dB at 5V).
Does the LTC2364IDE-18#PBF require external clocking for conversion timing?
No, the LTC2364IDE-18#PBF does not require an external clock for conversion timing. It integrates an internal oscillator that sets the conversion time to 1.9–3µs, eliminating external timing dependencies. Only the SCK signal is needed for serial data readout, and the CNV rising edge initiates each conversion autonomously.
Can the LTC2364IDE-18#PBF operate with different supply voltages on VDD and OVDD?
Yes, the LTC2364IDE-18#PBF supports independent supplies: VDD must be 2.375V–2.625V (nominal 2.5V), while OVDD ranges from 1.71V to 5.25V. This allows interfacing with 1.8V microcontrollers or 3.3V FPGAs without level shifters. Pin logic thresholds scale with OVDD (VIH = 0.8×OVDD, VIL = 0.2×OVDD).
What is the purpose of the exposed pad (Pin 17) on the LTC2364IDE-18#PBF DFN package?
The exposed pad (Pin 17) on the LTC2364IDE-18#PBF is electrically and thermally connected to GND. It must be soldered directly to the PCB ground plane to ensure proper thermal dissipation (θJA = 40°C/W) and reduce noise coupling. Leaving it unconnected degrades SNR by up to 3dB and risks thermal overstress at full throughput.
How does the LTC2364IDE-18#PBF handle power-down between conversions?
The LTC2364IDE-18#PBF automatically enters power-down mode after conversion completion, reducing total supply current to 0.9µA. Power-up is triggered by the next CNV rising edge, with full functionality restored within 20µs. This feature scales power consumption linearly with sampling rate-e.g., at 250sps, power drops to 3.4µW-ideal for duty-cycled sensing.
LTC2364IDE-18#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.375V ~ 2.625V
- Voltage - Supply, Digital:
- 2.375V ~ 2.625V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2364IDE-18#PBF FAQ
1.How can I place an order for LTC2364IDE-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2364IDE-18#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 LTC2364IDE-18#PBF reliable?
The price and inventory of LTC2364IDE-18#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2364IDE-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2364IDE-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2364IDE-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2364IDE-18#PBF?
LTC2364IDE-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2364IDE-18#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 LTC2364IDE-18#PBF?
For technical support, including LTC2364IDE-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2364IDE-18#PBF requirements.
6.How does Aetrix verify that LTC2364IDE-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2364IDE-18#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 LTC2364IDE-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2364IDE-18#PBF?
All LTC2364IDE-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2364IDE-18#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 LTC2364IDE-18#PBF part is unused and in its original packaging.
Return procedure for LTC2364IDE-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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