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Analog Devices Inc. LTC2345IUK-16#PBF
- Part No.:
- LTC2345IUK-16#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC2345IUK-16#PBF.pdf
- Description:
- IC ADC 16BIT SAR 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
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Product details
Overview
LTC2345IUK-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, octal-channel simultaneous-sampling SAR ADC with differential inputs, ±1.25LSB INL, 91dB SNR, and per-channel SoftSpan™ configurable input ranges (±4.096V, 0–4.096V, ±2.048V, 0–2.048V). It operates at 200ksps per channel with integrated 4.096V reference buffer and supports CMOS/LVDS serial interfaces - ideal for high-precision industrial process control and medical imaging signal chains.
For engineers reviewing the LTC2345IUK-16#PBF datasheet, LTC2345IUK-16#PBF pinout, LTC2345IUK-16#PBF application, or LTC2345IUK-16#PBF equivalent, key selection criteria include guaranteed no-missing-codes at 16 bits, 102dB CMRR at 200Hz, rail-to-rail input overdrive tolerance, operation up to 85°C, and pin-selectable digital I/O voltage (1.8V–5V).
Technical Context
The LTC2345IUK-16#PBF implements an 8-channel simultaneous sampling architecture using independent sample-and-hold circuits per channel, enabling true time-aligned acquisition across all inputs. Its SoftSpan™ configuration logic allows per-conversion range selection without reconfiguration latency.
It integrates a precision 2.048V bandgap reference (REFIN) and a buffered 4.096V master reference (REFBUF), with internal reference temperature coefficient of 5–20ppm/°C and rail-to-rail common-mode input range (0V to VDD). The ADC uses an internal conversion clock with zero cycle latency and supports both CMOS (1.8V–5V OVDD) and LVDS serial output modes.
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 | 200ksps per channel (8-channel mode) - enables real-time capture of signals up to ~31MHz –3dB bandwidth with 200ns settling. |
| INL / DNL | ±1.25LSB max INL, ±0.9LSB max DNL - ensures accurate amplitude fidelity in closed-loop control and spectral analysis. |
| SNR / THD | 91dB SNR, –113dB THD (fIN = 2kHz) - supports >15-bit effective resolution for low-distortion data acquisition. |
| CMRR | 102dB typical at 200Hz - rejects common-mode noise from motor drives, power supplies, or long sensor cables. |
| Input Ranges | Per-channel SoftSpan™: ±4.096V, 0–4.096V, ±2.048V, 0–2.048V - eliminates external gain switching and simplifies multi-sensor front-end design. |
| Supply / Power | VDD = 4.75–5.25V; 81mW typical (CMOS mode, 8 channels) - compatible with standard 5V industrial rails and thermally manageable in dense layouts. |
| Temperature Range | –40°C to +85°C - qualified for extended industrial environments including PLC cabinets and factory-floor instrumentation. |
Pinout & Package
48-lead (7mm × 7mm) QFN package with exposed thermal pad (Pin 49 = GND). All GND pins (15, 16, 17, 18, 20, 30, 41, 44, 45, 46, 49) must be soldered to a solid ground plane for optimal noise performance and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+ to IN7+, IN0– to IN7– (Pins 1–14, 47–48) | Differential analog inputs | Simultaneously sampled; support 0V–VDD common-mode range and ±VREFBUF differential spans - enable direct connection to isolated amplifiers or transformer-coupled sensors. |
| REFIN (Pin 19) | Bandgap reference output / external reference input | Nominally outputs 2.048V; accepts 1.25–2.2V external reference to override internal bandgap - enables system-level calibration traceability. |
| REFBUF (Pin 21) | Buffered master reference output | Delivers 4.096V (2×REFIN); requires 47µF local bypass - serves as precision reference for ADC core and external circuitry. |
| CNV (Pin 23) | Conversion start trigger | Edge-sensitive; initiates simultaneous sampling on rising edge - synchronizes acquisition across all 8 channels with <150ps matching. |
| SDO0–SDO7, SCKO, SCKI, SDI, CS, BUSY (Pins 24–39) | Serial interface I/O | Configurable CMOS (1.8V–5V) or LVDS; supports 1–8 data lanes - allows flexible trade-off between bus width, EMI, and throughput in space-constrained designs. |
| PD (Pin 22) | Power-down control | Active-high; reduces supply current to ≤2.1µA - enables ultra-low-power sleep states between bursts of acquisition. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel SoftSpan™ configuration | Enables independent input range selection (±4.096V, 0–4.096V, etc.) on every conversion - eliminates need for external programmable gain amplifiers in mixed-signal systems. |
| Simultaneous sampling with 150ps channel matching | Ensures phase-coherent acquisition across all 8 channels - critical for multi-phase power monitoring and beamforming applications. |
| Integrated 4.096V reference buffer with 5ppm/°C TC | Removes dependency on external reference ICs and associated layout sensitivity - improves system accuracy and reduces BOM count. |
| Rail-to-rail input overdrive tolerance | Withstands differential overvoltage up to ±VDD without corruption - protects against transients in industrial sensor interfaces and motor feedback paths. |
| 102dB CMRR at 200Hz | Rejects common-mode noise from AC mains, switching regulators, or shared ground returns - maintains signal integrity in electrically noisy factory environments. |
| Pin-selectable CMOS/LVDS interface | Supports either low-voltage CMOS (1.8V–5V) or differential LVDS signaling - allows optimization for board-level noise immunity or legacy controller compatibility. |
Applications
| Programmable Logic Controllers | Industrial Process Control |
|---|---|
Use Scenario: High-density analog input modules acquiring voltage/current signals from temperature, pressure, and flow sensors across multiple zones. IC Role / Device Role / Timing Role: Simultaneous-sampling 16-bit ADC digitizing 8 sensor channels with synchronized timestamps for closed-loop PID execution. Use Value: Eliminates inter-channel timing skew that degrades control loop stability; ±1.25LSB INL ensures precise setpoint tracking in safety-critical loops. | Use Scenario: Distributed I/O systems monitoring chemical reactor parameters (pH, dissolved oxygen, agitation torque) under harsh ambient conditions. IC Role / Device Role / Timing Role: Precision ADC with 102dB CMRR rejecting EMI from variable-frequency drives and solenoid valves. Use Value: Maintains measurement integrity despite 40–85°C ambient swings and high common-mode noise - reduces calibration frequency and maintenance cost. |
| Medical Imaging | High Speed Data Acquisition |
Use Scenario: Ultrasound beamformer front-end digitizing echo return signals from phased-array transducers. IC Role / Device Role / Timing Role: Octal simultaneous-sampling ADC capturing time-aligned RF echoes with sub-ns aperture jitter. Use Value: 91dB SNR and –113dB THD preserve weak echo amplitudes and harmonic content - directly improves image contrast resolution and tissue differentiation. | Use Scenario: Modular test equipment capturing transient waveforms from power electronics, battery cells, or RF components. IC Role / Device Role / Timing Role: Flexible-range ADC supporting ±4.096V (full-scale transients) and 0–2.048V (low-noise sensor biasing) within same acquisition sequence. Use Value: SoftSpan™ eliminates manual range switching and hardware reconfiguration - accelerates automated test sequences and reduces operator error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal, 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-16 | 16-bit, 8-channel, 1MSPS, internal reference, parallel/serial interface; no SoftSpan™; 100dB CMRR; 85dB SNR | Higher throughput but lower SNR and fixed ±10V/±5V ranges - less flexible for mixed-signal sensor arrays requiring varying full-scale spans. | Select when maximum sample rate (>200ksps) is prioritized over dynamic range and input flexibility. |
| ADS8688 | 16-bit, 8-channel, 500ksps, integrated PGA, SPI interface; ±10.24V/±5.12V/±2.56V ranges; 92dB SNR; 100dB CMRR | Includes programmable gain amplifier but lacks simultaneous sampling - introduces channel-to-channel timing skew unsuitable for phase-sensitive measurements. | Select when signal conditioning (gain/attenuation) is required before digitization and inter-channel timing alignment is not critical. |
Compared with AD7606C-16 and ADS8688, the LTC2345IUK-16#PBF uniquely combines simultaneous sampling, per-channel SoftSpan™ configurability, and 91dB SNR - making it optimal for applications demanding both temporal coherence and adaptive input scaling without external support circuitry.
Availability
LTC2345IUK-16#PBF is available at Aetrix Electronics and suitable for industrial process control, programmable logic controllers, medical imaging subsystems, and high-speed data acquisition systems requiring stable component supply, extended temperature operation, and long-term obsolescence management.
Supply support for LTC2345IUK-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, 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 LTC2345IUK-16#PBF belongs to ADI's precision data acquisition portfolio, designed specifically for applications requiring simultaneous multi-channel sampling, wide dynamic range, and robust operation in electrically noisy, thermally demanding environments.
FAQ
What is the guaranteed operating temperature range for the LTC2345IUK-16#PBF?
The LTC2345IUK-16#PBF is rated for operation from –40°C to +85°C (Industrial grade). This is confirmed by the "I" suffix in the part number and explicitly stated in the Absolute Maximum Ratings table. The device maintains full 16-bit no-missing-codes performance and specified INL/SNR/CMRR across this entire range, making it suitable for deployment in uncontrolled industrial enclosures and outdoor instrumentation.
Does the LTC2345IUK-16#PBF require an external reference, or does it include an internal one?
The LTC2345IUK-16#PBF includes a complete internal reference system: a 2.048V bandgap reference (output on REFIN pin) and a buffered 4.096V master reference (output on REFBUF pin). No external reference is required for basic operation. However, REFIN can be overdriven with an external 1.25–2.2V reference to improve absolute accuracy or enable system-level calibration traceability - the LTC2345IUK-16#PBF supports both configurations.
How many analog input channels does the LTC2345IUK-16#PBF support, and are they sampled simultaneously?
The LTC2345IUK-16#PBF supports eight fully differential analog input channels (IN0+/- through IN7+/-) and performs true simultaneous sampling across all channels using independent sample-and-hold circuits. This is confirmed by the "Octal, 16-Bit, 200ksps Differential SoftSpan ADC" product description and the 150ps aperture delay matching specification - ensuring time-aligned acquisition essential for phase-coherent measurements in power quality analyzers and ultrasound systems.
What digital interface options does the LTC2345IUK-16#PBF support, and how are they selected?
The LTC2345IUK-16#PBF supports both CMOS and LVDS serial interfaces, selected via the LVDS/CMOS pin (Pin 24). In CMOS mode, it operates with OVDD from 1.8V to 5V and supports 1–8 data lanes (SDO0–SDO7). In LVDS mode, it uses differential signaling with 100Ω termination and supports up to 8 lanes. Interface timing (e.g., SCKI period: 10ns min for CMOS, 4ns min for LVDS) is fully specified in the datasheet - the LTC2345IUK-16#PBF provides hardware-selectable flexibility for noise-sensitive or high-speed host connections.
Can individual channels on the LTC2345IUK-16#PBF be disabled, and what benefit does that provide?
Yes, individual channels on the LTC2345IUK-16#PBF can be disabled via configuration registers. Disabling unused channels increases the effective throughput of the remaining active channels - for example, with only 4 channels enabled, the sampling rate rises to 375ksps per active channel. This feature optimizes system bandwidth utilization and reduces average power consumption, making the LTC2345IUK-16#PBF adaptable to dynamic channel requirements in modular data loggers and reconfigurable test equipment.
LTC2345IUK-16#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SoftSpan™
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 8
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 8:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-QFN (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2345IUK-16#PBF FAQ
1.How can I place an order for LTC2345IUK-16#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2345IUK-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 LTC2345IUK-16#PBF reliable?
The price and inventory of LTC2345IUK-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 LTC2345IUK-16#PBF is usually 5 days.
3.What payment methods are accepted for LTC2345IUK-16#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2345IUK-16#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2345IUK-16#PBF?
LTC2345IUK-16#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2345IUK-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 LTC2345IUK-16#PBF?
For technical support, including LTC2345IUK-16#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2345IUK-16#PBF requirements.
6.How does Aetrix verify that LTC2345IUK-16#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2345IUK-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 LTC2345IUK-16#PBF meets industry standards.
7.What is the process for return or replacement of LTC2345IUK-16#PBF?
All LTC2345IUK-16#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2345IUK-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 LTC2345IUK-16#PBF part is unused and in its original packaging.
Return procedure for LTC2345IUK-16#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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