My Inquiry
My Account
Analog Devices Inc. LTC2369CDE-18#PBF
- Part No.:
- LTC2369CDE-18#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC2369CDE-18#PBF.pdf
- Description:
- IC ADC 18BIT SAR 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,119
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2369CDE-18#PBF from Analog Devices (formerly Linear Technology) is an 18-bit, 1.6 Msps pseudo-differential unipolar successive approximation register (SAR) ADC operating from a single 2.5 V supply. It delivers 96.5 dB SNR (typ), ±2.5 LSB INL (max), and guaranteed no missing codes at full 18-bit resolution, with VREF support from 2.5 V to 5.1 V. It is deployed in high-speed data acquisition systems requiring low power, high dynamic range, and deterministic latency-free conversion.
For engineers reviewing the LTC2369CDE-18#PBF datasheet, LTC2369CDE-18#PBF pinout, LTC2369CDE-18#PBF application, or LTC2369CDE-18#PBF equivalent, key selection criteria include its 1.6 Msps throughput with zero cycle latency, internal conversion clock eliminating external timing constraints, and dual-supply architecture (VDD = 2.5 V, OVDD = 1.8–5.25 V) enabling interoperability with mixed-voltage digital interfaces.
Technical Context
The LTC2369CDE-18#PBF employs a charge-redistribution SAR architecture with a 45 pF sampling capacitor and 40 Ω switch on-resistance, enabling precise pseudo-differential acquisition of signals referenced to IN– (±100 mV range). Its internal oscillator fixes tCONV at 360–412 ns, ensuring consistent timing independent of host interface clocking.
Conversion is initiated by a rising edge on CNV; BUSY goes high at start and returns low upon completion. The SPI-compatible serial interface supports daisy-chain mode via CHAIN/RDL/SDI control and operates across 1.8 V to 5 V logic levels, with SDO outputting straight-binary 18-bit data MSB-first on SCK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - guarantees 262,144 distinct output codes with no missing codes over full temperature range. |
| Sampling Rate | 1.6 Msps - enables real-time capture of signals up to 800 kHz Nyquist bandwidth without pipeline delay. |
| SNR | 96.5 dB (typ, fIN = 2 kHz, VREF = 5 V) - corresponds to effective noise floor of ≈19 μV RMS for 5 V full-scale input. |
| INL | ±2.5 LSB (max) - limits integral nonlinearity error to ±0.0048% of full scale, critical for precision measurement linearity. |
| Power Dissipation | 18 mW at 1.6 Msps - enables high-throughput operation in thermally constrained portable instrumentation. |
| Reference Range | 2.5 V to 5.1 V - allows flexible scaling of input dynamic range while maintaining 18-bit resolution and monotonicity. |
| Aperture Jitter | 4 ps (typ) - contributes <0.02 LSB noise at 2 kHz input, preserving high SNR in undersampled applications. |
Pinout & Package
Package: 16-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 17), RoHS-compliant, rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CHAIN (1) | Mode selector | High enables daisy-chain SPI mode (RDL/SDI becomes serial input); low enables bus-enable mode (RDL/SDI controls SDO tri-state). |
| VDD (2) | Analog core supply | 2.375–2.625 V supply powering SAR array, reference buffer, and comparator; requires 10 μF ceramic bypass to GND. |
| GND (3,6,10,16) | Analog/digital ground | Four dedicated ground pins minimize ground bounce; exposed pad (Pin 17) must be soldered to PCB ground plane for thermal and noise performance. |
| IN+ (4) | Pseudo-differential analog input (+) | Accepts 0 V to VREF voltage relative to IN–; sees 45 pF capacitance and 40 Ω switch resistance during acquisition phase. |
| IN– (5) | Pseudo-differential analog ground sense (–) | Input range ±100 mV w.r.t. GND; used to reject common-mode noise; must connect directly to system ground or remote ground sense point. |
| REF (7,8) | Reference voltage inputs | Dual-pinned for low-inductance connection; accepts 2.5–5.1 V; requires 47 μF X5R ceramic decoupling close to pins. |
| CNV (9) | Convert trigger | Rising-edge–sensitive input initiating conversion; powers up ADC and starts internal timing sequence; no minimum pulse width required. |
| BUSY (11) | Conversion status indicator | Open-drain output pulled high externally; asserts high at conversion start and deasserts low upon result availability (tCONV + tBUSYLH). |
| RDL/SDI (12) | Configurable serial I/O | Function depends on CHAIN state: in normal mode, controls SDO enable; in chain mode, serves as serial data input for daisy-chained devices. |
| SCK (13) | Serial clock input | Drives data shift-out timing; supports up to 100 MHz (10 ns period); logic levels referenced to OVDD. |
| SDO (14) | Serial data output | Outputs 18-bit straight-binary result MSB-first on SCK rising edges; tri-stated when RDL = low (normal mode) or CHAIN = low. |
| OVDD (15) | Digital I/O supply | 1.71–5.25 V supply setting logic thresholds for all digital pins; enables direct interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V controllers. |
Key Features
| Feature | Design Value |
|---|---|
| No cycle latency | Delivers first valid conversion result within one sampling period (625 ns), enabling real-time closed-loop control without buffering delays. |
| Auto power-down | Reduces current draw to ≤0.9 μA between conversions, scaling power linearly with sample rate-18 μW at 1.6 ksps. |
| Internal conversion clock | Eliminates need for external timing components or synchronization circuitry; ensures stable tCONV (360–412 ns) across voltage/temperature. |
| Pseudo-differential input architecture | Rejects common-mode noise on IN+/IN– pair while supporting unipolar 0 V to VREF range-ideal for sensor front-ends with ground-referenced sources. |
| SPI-compatible daisy-chain mode | Enables synchronous readout of multiple LTC2369CDE-18#PBF devices using single SCK/SDO lines, reducing controller pin count and PCB routing complexity. |
Applications
| Medical Imaging Signal Digitization | Portable High-Speed Data Logger |
|---|---|
|
Use Scenario: Digitizing low-noise analog outputs from ultrasound transducer arrays or MRI gradient amplifiers requiring >90 dB SNR and minimal harmonic distortion. IC Role / Device Role / Timing Role: Primary high-fidelity ADC capturing baseband RF or fast-slewing analog waveforms at up to 1.6 Msps with deterministic latency. Use Value: 96.5 dB SNR and –120 dB THD preserve signal integrity for accurate image reconstruction; internal clock simplifies timing-critical board layout. |
Use Scenario: Battery-powered field instruments acquiring vibration, acoustic emission, or environmental sensor data over extended periods. IC Role / Device Role / Timing Role: Low-power, high-resolution ADC performing burst-mode sampling triggered by event detection circuits. Use Value: 18 mW active power and auto power-down to ≤0.9 μA extend battery life; 18-bit resolution captures subtle amplitude variations in transient phenomena. |
| Industrial Process Control Loop | Automated Test Equipment (ATE) |
|
Use Scenario: Real-time monitoring of motor currents, pressure transducers, or thermal sensors in PLC-based control systems operating up to 125°C ambient. IC Role / Device Role / Timing Role: Precision ADC providing feedback for PID controllers with sub-LSB linearity stability over temperature. Use Value: ±2.5 LSB INL (max) and guaranteed no missing codes ensure measurement repeatability; 0°C to 70°C grade matches industrial enclosure thermal profiles. |
Use Scenario: High-channel-count ATE systems validating mixed-signal ICs where synchronized multi-device sampling and fast throughput are mandatory. IC Role / Device Role / Timing Role: Channel ADC in modular digitizer cards, leveraging daisy-chain SPI to reduce FPGA I/O usage and simplify firmware. Use Value: Daisy-chain capability supports up to 16 devices per bus; 1.6 Msps rate enables rapid test vector execution without data bottlenecks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IRGET | 16-bit resolution, 1 Msps, 92 dB SNR (typ), 2.5 V supply only, no daisy-chain mode. | Limited to lower-resolution applications; lacks CHAIN pin and multi-device synchronization capability. | Select when 16-bit resolution suffices and system-level timing simplicity outweighs need for 18-bit fidelity or daisy-chain scalability. |
| AD7960BCPZ-RL7 | 18-bit, 5 Msps, 95.5 dB SNR (typ), 5 V analog supply, LVDS interface (not SPI), higher power (43 mW). | Requires differential signaling infrastructure and higher power budget; not drop-in compatible with SPI microcontrollers. | Choose for ultra-high-throughput applications where LVDS interface and 5 Msps rate justify added complexity and power cost. |
Compared with ADS8860IRGET and AD7960BCPZ-RL7, the LTC2369CDE-18#PBF uniquely balances 18-bit resolution, 1.6 Msps speed, SPI compatibility, daisy-chain support, and ultra-low 18 mW power-making it optimal for space-constrained, multi-channel, battery-aware systems needing deterministic latency and wide reference flexibility.
Availability
LTC2369CDE-18#PBF is available at Aetrix Electronics and suitable for medical imaging signal digitization, portable high-speed data logging, and industrial process control requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for LTC2369CDE-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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2369CDE-18#PBF belongs to ADI's legacy Linear Technology precision SAR ADC product line, engineered specifically for applications demanding high resolution, low power, and zero-latency deterministic conversion in compact form factors.
FAQ
What is the maximum sampling rate supported by the LTC2369CDE-18#PBF?
The LTC2369CDE-18#PBF supports a maximum sampling rate of 1.6 Msps, corresponding to a minimum conversion cycle time of 625 ns. This rate is guaranteed across the full 0°C to 70°C operating temperature range and is enabled by its internal oscillator and optimized SAR architecture-no external clock conditioning is required to achieve this throughput.
Does the LTC2369CDE-18#PBF require an external reference voltage?
Yes, the LTC2369CDE-18#PBF requires an external reference voltage applied to the REF pins (7 and 8). It accepts VREF from 2.5 V to 5.1 V, and performance metrics-including SNR, INL, and code width-are specified across this range. A low-noise, low-drift reference such as the LTC6655-5 is recommended to maintain datasheet-grade accuracy.
How does the pseudo-differential input architecture of the LTC2369CDE-18#PBF improve noise immunity?
The LTC2369CDE-18#PBF's pseudo-differential input uses IN+ and IN– terminals to reject common-mode noise: IN+ accepts 0 V to VREF signals while IN– is biased near ground (±100 mV range). This configuration provides ≥80 dB CMRR at 800 kHz, suppressing interference from shared ground paths or EMI without requiring fully differential signal conditioning circuitry.
Can the LTC2369CDE-18#PBF interface directly with a 1.8 V microcontroller?
Yes, the LTC2369CDE-18#PBF supports 1.8 V logic levels via its OVDD pin (Pin 15), which sets input thresholds and output drive strength. When OVDD = 1.8 V, VIH = 1.44 V (min) and VOL = 0.2 V (max), ensuring reliable communication with 1.8 V I/O domains without level-shifting circuitry-while VDD remains fixed at 2.5 V for analog performance.
What is the purpose of the exposed pad (Pin 17) on the LTC2369CDE-18#PBF DFN package?
The exposed pad (Pin 17) on the LTC2369CDE-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 to minimize ground impedance, which is critical for achieving specified SNR, THD, and INL performance-especially at full 1.6 Msps throughput.
LTC2369CDE-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):
- 1.6M
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2369CDE-18#PBF FAQ
1.How can I place an order for LTC2369CDE-18#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2369CDE-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 LTC2369CDE-18#PBF reliable?
The price and inventory of LTC2369CDE-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 LTC2369CDE-18#PBF is usually 5 days.
3.What payment methods are accepted for LTC2369CDE-18#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2369CDE-18#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2369CDE-18#PBF?
LTC2369CDE-18#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2369CDE-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 LTC2369CDE-18#PBF?
For technical support, including LTC2369CDE-18#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2369CDE-18#PBF requirements.
6.How does Aetrix verify that LTC2369CDE-18#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2369CDE-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 LTC2369CDE-18#PBF meets industry standards.
7.What is the process for return or replacement of LTC2369CDE-18#PBF?
All LTC2369CDE-18#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2369CDE-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 LTC2369CDE-18#PBF part is unused and in its original packaging.
Return procedure for LTC2369CDE-18#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2369CDE-18#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
