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Analog Devices Inc. LTC2344HUH-16#PBF
- Part No.:
- LTC2344HUH-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2344HUH-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,148
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Product details
Overview
LTC2344HUH-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 I/O in a 32-lead 5mm × 5mm QFN package rated for –40°C to 125°C.
For engineers reviewing the LTC2344HUH-16#PBF datasheet, LTC2344HUH-16#PBF pinout, LTC2344HUH-16#PBF application, or LTC2344HUH-16#PBF equivalent, key selection criteria include guaranteed no-missing-codes at 16 bits, rail-to-rail input overdrive tolerance, 102dB CMRR at 200Hz, programmable per-channel input range, and H-grade extended temperature operation up to 125°C.
Technical Context
The LTC2344HUH-16#PBF implements a successive approximation register architecture with internal conversion clock and zero-cycle latency. Its analog front-end features four independent differential input pairs (IN0± to IN3±), each supporting user-selectable SoftSpan ranges via SPI configuration-enabling mixed bipolar/unipolar signal acquisition on a per-conversion basis.
Digital interface flexibility includes pin-selectable CMOS (1.8V–5V) or LVDS output modes, with 1–4 data lanes in CMOS mode to balance throughput and bus width. The device integrates a buffered 4.096V reference (REFBUF) derived from an internal 2.048V bandgap (REFIN), with external overdrive capability and dedicated power-down (PD) control for dynamic power management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - guarantees full 65,536-code resolution with no missing codes across full operating temperature range. |
| Sampling Rate | 400ksps per channel - enables real-time capture of signals up to ~200kHz Nyquist bandwidth with four simultaneous channels. |
| INL | ±1.25LSB max - ensures high DC accuracy for precision sensor measurement and closed-loop control applications. |
| SNR | 93.4dB typical - delivers >15.5 effective number of bits (ENOB) for high-fidelity signal digitization. |
| CMRR | 102dB typical at 200Hz - rejects common-mode noise in industrial transducer interfaces with unbalanced cabling. |
| Supply Current | 17.6mA typical (VDD = 5V, 4 ch, CMOS mode) - enables low-power high-channel-count DAQ systems without thermal derating at 125°C. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, downhole oil & gas, and high-reliability industrial 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 1–8) | Differential analog inputs, Channels 0–3 | Simultaneously sampled; support 0V to VDD common-mode range and ±VREFBUF differential spans - eliminates need for external level-shifting or gain stages. |
| REFIN (Pin 10) | Internal bandgap reference output / external reference input | Outputs 2.048V nominal; accepts 1.25V–2.2V external reference to calibrate system accuracy or improve drift performance. |
| REFBUF (Pin 12) | Buffered master reference output | Provides 4.096V (2×REFIN) with 47μF bypass; can be overdriven with 2.5V–5V external reference when REFBUF is disabled via REFIN = 0V. |
| PD (Pin 13) | Power-down control input | Active-high logic; initiates low-power state (<0.33mW) and global reset on double assertion - enables deterministic wake-up sequencing. |
| CS / CNV / BUSY / SDO0–SDO3 / SCKI / SCKO (Pins 14–32) | Serial interface control and data I/O | Configurable for CMOS (1.8V–5V) or LVDS; supports 1–4 lane output for flexible timing and routing - reduces FPGA I/O count in multi-channel systems. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan configuration | Independent selection of ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V per conversion - enables mixed-signal acquisition (e.g., thermocouple + RTD + voltage) without external multiplexing or gain switching. |
| Rail-to-rail input overdrive tolerance | Accepts differential input overvoltage up to ±VDD - protects against transient surges and simplifies anti-aliasing filter design with relaxed headroom requirements. |
| 102dB CMRR at 200Hz | Rejects common-mode noise from long cables or noisy motor drives - maintains accuracy in PLC analog input modules without shielded twisted-pair or active guarding. |
| Guaranteed operation to 125°C | H-grade qualification verified across full temperature range - eliminates derating concerns in engine control units, power inverters, and aerospace avionics. |
| Integrated reference buffer (4.096V) | Eliminates need for external reference IC and buffer amplifier - reduces BOM count, board area, and calibration complexity in portable and space-constrained DAQ systems. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-density analog input modules acquiring 4–16 channels of 4–20mA current loops, thermocouples, and strain gauges in factory automation cabinets. IC Role / Device Role / Timing Role: Simultaneous sampling ADC with per-channel SoftSpan and 102dB CMRR - captures synchronized snapshots of multi-sensor process variables while rejecting ground-loop noise. Use Value: Eliminates channel-to-channel skew and common-mode interference, enabling precise derivative-based control algorithms without software compensation. | Use Scenario: Distributed I/O nodes monitoring pressure, flow, and temperature in chemical plant pipelines with ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: H-grade 16-bit SAR ADC with rail-to-rail overdrive tolerance - withstands field transients and operates reliably in uncooled enclosures near heat sources. Use Value: Reduces need for external protection circuitry and thermal management, lowering total system cost and improving long-term calibration stability. |
| Medical Imaging Subsystems | High-Speed Data Acquisition |
Use Scenario: Ultrasound beamformer front-end digitizing echo signals from 4 parallel transducer elements with time-of-flight matching. IC Role / Device Role / Timing Role: Quad simultaneous-sampling ADC with <150ps aperture delay matching - preserves phase coherence between channels for accurate beam steering. Use Value: Enables high-resolution spatial imaging without hardware inter-channel deskew, reducing FPGA resource usage and firmware complexity. | Use Scenario: Portable oscilloscope or spectrum analyzer capturing transient waveforms from RF power amplifiers or switch-mode power supplies. IC Role / Device Role / Timing Role: 400ksps/channel SAR ADC with 93.4dB SNR and 115dB SFDR - resolves low-level harmonics and spurs in wide-dynamic-range measurements. Use Value: Delivers >15.5 ENOB performance without oversampling or digital filtering, accelerating real-time FFT processing in battery-powered instruments. |
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/±5V fixed input ranges, internal 2.5V ref, no per-channel SoftSpan | Higher channel count and speed but less flexible input scaling; requires external level-shifting for mixed-signal inputs | Select when needing >4 channels or faster sampling; avoid when per-channel range agility is required for heterogeneous sensor types. |
| ADS8684 | 4-channel, 500ksps, ±10.24V/0–10.24V ranges, integrated PGA, SPI-only CMOS interface | Includes programmable gain amplifier (PGA) but lacks LVDS option and 125°C rating; lower SNR (91.5dB) | Select when signal conditioning (gain/attenuation) is needed on-chip; avoid for high-temperature or ultra-low-noise applications. |
Compared with AD7606C-16 and ADS8684, the LTC2344HUH-16#PBF uniquely combines per-channel SoftSpan configurability, 125°C operation, and dual CMOS/LVDS interface - making it optimal for thermally demanding, mixed-signal industrial DAQ where input range agility and noise immunity are critical.
Availability
LTC2344HUH-16#PBF is available at Aetrix Electronics and suitable for industrial process control, programmable logic controllers, medical imaging subsystems, and high-speed data acquisition requiring stable component supply across extended temperature ranges.
Supply support for LTC2344HUH-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 high-accuracy, multi-channel data acquisition in harsh environments - emphasizing simultaneous sampling, wide common-mode rejection, and extended temperature reliability for mission-critical sensing applications.
FAQ
What is the maximum sampling rate per channel for the LTC2344HUH-16#PBF?
The LTC2344HUH-16#PBF achieves 400ksps per channel when all four channels are enabled. Sampling rate scales with channel count: 500ksps with three channels, 666ksps with two, and 1000ksps with one channel enabled - allowing dynamic throughput optimization based on system requirements.
Does the LTC2344HUH-16#PBF require an external reference voltage?
No, the LTC2344HUH-16#PBF includes an internal 2.048V bandgap reference (REFIN) and a buffered 4.096V output (REFBUF). External references are optional: REFIN accepts 1.25V–2.2V for improved accuracy, and REFBUF accepts 2.5V–5V when the internal buffer is disabled by grounding REFIN.
How does the SoftSpan feature work on the LTC2344HUH-16#PBF?
The SoftSpan feature allows each of the four channels on the LTC2344HUH-16#PBF to be independently configured per conversion for ±4.096V, 0–4.096V, ±2.048V, or 0–2.048V input ranges - implemented via SPI register writes. This enables heterogeneous signal acquisition (e.g., bipolar thermocouple + unipolar pressure sensor) without external hardware reconfiguration.
What is the operating temperature range of the LTC2344HUH-16#PBF?
The LTC2344HUH-16#PBF is rated for –40°C to +125°C operation (H-grade), with full electrical specifications guaranteed across this range. This extends beyond commercial (0°C–70°C) and industrial (–40°C–85°C) grades, making it suitable for under-hood automotive, downhole, and high-ambient industrial applications.
Can the LTC2344HUH-16#PBF interface directly with an FPGA using LVDS?
Yes, the LTC2344HUH-16#PBF supports pin-selectable LVDS serial output with differential SDO+/– and SCKO+/– pairs. It meets LVDS electrical standards (VID = 200–600mV, VOCM = 1.1–1.3V) and provides <1ps skew between data and clock - enabling robust high-speed interfacing with Xilinx or Intel FPGAs without level-shifting components.
LTC2344HUH-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:
- -40°C ~ 125°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2344HUH-16#PBF FAQ
1.How can I place an order for LTC2344HUH-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2344HUH-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 LTC2344HUH-16#PBF reliable?
The price and inventory of LTC2344HUH-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 LTC2344HUH-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2344HUH-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2344HUH-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2344HUH-16#PBF?
LTC2344HUH-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2344HUH-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 LTC2344HUH-16#PBF?
For technical support, including LTC2344HUH-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2344HUH-16#PBF requirements.
6.How does Aetrix verify that LTC2344HUH-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2344HUH-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 LTC2344HUH-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2344HUH-16#PBF?
All LTC2344HUH-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2344HUH-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 LTC2344HUH-16#PBF part is unused and in its original packaging.
Return procedure for LTC2344HUH-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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