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Analog Devices Inc. LTC2344CUH-16#PBF
- Part No.:
- LTC2344CUH-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2344CUH-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,303
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Product details
Overview
LTC2344CUH-16#PBF from Analog Devices is a 16-bit, quad-channel simultaneous-sampling SAR ADC with differential wide common-mode inputs, ±1.25LSB INL, 93.4dB SNR, and per-channel SoftSpan configuration (±4.096V/0–4.096V/±2.048V/0–2.048V). It operates at 400ksps per channel with integrated 4.096V reference buffer and supports CMOS/LVDS serial interfaces in a 32-lead 5mm × 5mm QFN package for industrial process control signal acquisition.
For engineers reviewing the LTC2344CUH-16#PBF datasheet, LTC2344CUH-16#PBF pinout, LTC2344CUH-16#PBF application, or LTC2344CUH-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance, 102dB CMRR at 200Hz, rail-to-rail input overdrive tolerance, and programmable logic controller interface compatibility with SPI CMOS (1.8V–5V) or LVDS I/O.
Technical Context
The LTC2344CUH-16#PBF implements a successive approximation register architecture with internal conversion clock and zero-cycle latency, enabling deterministic timing across all four channels. Its analog front-end features independently configurable per-channel SoftSpan ranges via digital command, supporting both bipolar and unipolar differential input modes without external gain switching.
Input signal conditioning leverages a 102dB typical common-mode rejection ratio and rail-to-rail input overdrive tolerance (−VDD to +VDD), allowing direct connection to sensor outputs or op-amp drivers without level-shifting circuitry. The integrated reference buffer delivers 4.096V with ±5ppm/°C drift and supports external overdrive between 2.5V and 5V when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees full 65,536-code dynamic range with no missing codes across temperature. |
| Sampling Rate | 400ksps per channel - enables real-time capture of 200kHz bandwidth signals with Nyquist margin. |
| INL | ±1.25LSB max - ensures accurate representation of linear transducer outputs in precision measurement systems. |
| SNR | 93.4dB typical - supports >15.5 effective number of bits (ENOB) for high-fidelity data acquisition. |
| CMRR | 102dB typical at 200Hz - rejects common-mode noise from motor drives or industrial power supplies. |
| Power Dissipation | 81mW typical at 400ksps - enables thermally constrained designs in dense PLC modules. |
| Operating Temp | 0°C to 70°C - validated for commercial-grade industrial automation environments. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN (UH package) with exposed pad (Pin 33) soldered to PCB ground plane for thermal and electrical integrity. θJA = 44°C/W, TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ / IN0– to IN3+ / IN3– (Pins 1/2, 3/4, 5/6, 7/8) | Differential analog inputs | Simultaneously sample four independent channels with 0V–5V common-mode range and ±5V differential overdrive tolerance. |
| REFIN (Pin 10) | Bandgap reference output / buffer input | Provides 2.048V internal reference; accepts 1.25V–2.2V external reference for improved accuracy. |
| REFBUF (Pin 12) | Reference buffer output | Delivers 4.096V master reference; bypassed with 47µF capacitor; disable by grounding REFIN to overdrive externally (2.5V–5V). |
| PD (Pin 13) | Power-down control | Active-high signal reduces current to 0.33mW; double pulse triggers global reset equivalent to power-on-reset. |
| CS / CNV / BUSY / SDO0–SDO3 / SCKI / SCKO (Pins 14–28) | Digital I/O interface | Configurable for SPI CMOS (1.8V–5V) or LVDS; supports 1–4 data lanes; CNV initiates conversion, BUSY indicates active conversion. |
| VDD / OVDD / GND (Pins 15, 19, 21, 22, 24, 25, 27, 29, 31, 32, 33) | Power and ground | VDD = 4.75–5.25V analog supply; OVDD = 1.71–5.25V I/O supply; multiple GND pins require low-inductance PCB ground plane connection. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan configuration | Independent selection of ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V range per channel eliminates external gain-switching circuitry. |
| Simultaneous sampling | Four channels acquire at exact same instant-critical for phase-coherent multi-sensor monitoring in motor control or vibration analysis. |
| Rail-to-rail input overdrive tolerance | Accepts differential inputs from −5V to +5V without damage or conversion corruption-simplifies anti-aliasing filter design and fault protection. |
| Integrated reference buffer | On-chip 4.096V reference with <5ppm/°C drift and 47µF bypass enables stable precision measurements without external voltage references. |
| CMOS/LVDS dual-interface support | Pin-selectable digital interface allows optimization for noise immunity (LVDS) or board-level integration (CMOS) without redesigning PCB layout. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-speed analog input modules in modular PLC chassis acquiring voltage/current signals from field transmitters and actuators. IC Role / Device Role / Timing Role: Simultaneous 4-channel digitization of 4–20mA loop outputs and 0–10V sensor signals with synchronized sampling for closed-loop control. Use Value: Eliminates inter-channel skew in feedback loops, enabling precise derivative-based PID computation and reducing jitter-induced control instability. | Use Scenario: Distributed I/O systems monitoring pressure, temperature, and flow in chemical processing plants with EMI-rich environments. IC Role / Device Role / Timing Role: Front-end ADC for isolated analog input cards interfacing with RTD, thermocouple, and strain gauge signal conditioners. Use Value: 102dB CMRR rejects common-mode noise from variable-frequency drives and 50/60Hz mains coupling, improving measurement repeatability. |
| Medical Imaging Subsystems | High-Speed Data Acquisition |
Use Scenario: Ultrasound beamformer front-end capturing echo signals from phased-array transducers with time-of-flight precision. IC Role / Device Role / Timing Role: Simultaneous sampling of multiple receive channels for digital beamforming with sub-nanosecond aperture delay matching. Use Value: 150ps aperture delay matching preserves phase coherence across channels, enabling high-resolution spatial imaging without calibration overhead. | Use Scenario: Portable oscilloscope modules and automated test equipment requiring compact, low-power multichannel digitization. IC Role / Device Role / Timing Role: Core ADC in battery-powered DAQ devices performing real-time FFT analysis on vibration or acoustic signals. Use Value: 93.4dB SNR and 81mW power dissipation enable >15.5 ENOB performance while extending operating time on single-cell Li-ion batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-16 | 8-channel, 1MSPS, ±2.5V/0–5V fixed ranges, internal 2.5V ref, parallel/serial interface | Higher channel count and speed but lacks per-channel SoftSpan flexibility and LVDS option | Select for higher throughput or more channels; avoid when differential range reconfiguration per channel is required. |
| ADS8684 | 4-channel, 500kSPS, ±10.24V/0–10.24V fixed ranges, integrated PGA, SPI-only interface | Includes programmable gain amplifier but no LVDS support and lower SNR (91dB) | Select when input signal scaling varies widely and PGA eliminates external amplifiers; avoid for LVDS noise-sensitive systems. |
Compared with AD7606C-16 and ADS8684, the LTC2344CUH-16#PBF uniquely combines per-channel SoftSpan configurability, LVDS interface for noise immunity, and 102dB CMRR-making it optimal for industrial PLCs where signal range diversity and EMI resilience are critical.
Availability
LTC2344CUH-16#PBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and medical imaging subsystems requiring stable component supply, long-term lifecycle management, and traceable sourcing.
Supply support for LTC2344CUH-16#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2344 family is designed for precision multichannel data acquisition in harsh industrial environments, emphasizing simultaneous sampling, flexible input ranging, and robust noise immunity for PLCs and process instrumentation.
FAQ
What is the maximum sampling rate per channel for the LTC2344CUH-16#PBF?
The LTC2344CUH-16#PBF achieves 400ksps per channel when all four channels are enabled. Throughput increases to 500ksps, 666ksps, and 1000ksps when three, two, or one channel is active respectively-enabling dynamic allocation of sampling resources based on system requirements.
Does the LTC2344CUH-16#PBF require an external reference voltage?
No-the LTC2344CUH-16#PBF integrates a 2.048V bandgap reference and 4.096V reference buffer. REFIN provides the 2.048V output, and REFBUF delivers the buffered 4.096V master reference. External overdrive is optional: apply 1.25V–2.2V to REFIN or 2.5V–5V to REFBUF (with REFIN grounded) for enhanced accuracy.
How does the SoftSpan feature work on the LTC2344CUH-16#PBF?
The SoftSpan feature allows each of the four channels on the LTC2344CUH-16#PBF to be independently configured per conversion for ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V input ranges via SPI command. This eliminates external gain-switching components and enables mixed-signal acquisition-for example, measuring both 4–20mA current loops and ±10V servo feedback on the same device.
What digital interface options does the LTC2344CUH-16#PBF support?
The LTC2344CUH-16#PBF supports pin-selectable CMOS (1.8V–5V) and LVDS serial interfaces. In CMOS mode, users can configure 1–4 data lanes (SDO0–SDO3) to balance bus width and throughput. LVDS mode provides differential signaling for superior noise immunity in electrically noisy industrial settings.
What is the operating temperature range of the LTC2344CUH-16#PBF?
The LTC2344CUH-16#PBF is rated for 0°C to 70°C operation (C-grade). This commercial temperature range is validated for use in programmable logic controllers, industrial HMIs, and factory-floor data loggers where ambient conditions remain within controlled environmental limits.
LTC2344CUH-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SoftSpan™
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 4
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2344CUH-16#PBF FAQ
1.How can I place an order for LTC2344CUH-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2344CUH-16#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 LTC2344CUH-16#PBF reliable?
The price and inventory of LTC2344CUH-16#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2344CUH-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2344CUH-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2344CUH-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2344CUH-16#PBF?
LTC2344CUH-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2344CUH-16#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 LTC2344CUH-16#PBF?
For technical support, including LTC2344CUH-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2344CUH-16#PBF requirements.
6.How does Aetrix verify that LTC2344CUH-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2344CUH-16#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 LTC2344CUH-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2344CUH-16#PBF?
All LTC2344CUH-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2344CUH-16#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 LTC2344CUH-16#PBF part is unused and in its original packaging.
Return procedure for LTC2344CUH-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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