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Analog Devices Inc. LTC2341CUH-18#TRPBF
- Part No.:
- LTC2341CUH-18#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC2341CUH-18#TRPBF.pdf
- Description:
- IC ADC 18BIT SAR 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
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Product details
Overview
LTC2341CUH-18#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, 18-bit, simultaneous-sampling SAR ADC with differential wide common-mode inputs, ±4LSB INL, 95dB SNR, and per-channel SoftSpan™ configurable input ranges (±4.096V, 0–4.096V, ±2.048V, 0–2.048V). It operates at 666ksps per channel with integrated 4.096V reference buffer and supports both CMOS (1.8–5V) and LVDS serial interfaces - ideal for high-precision industrial data acquisition systems requiring channel-to-channel isolation and rail-to-rail input overdrive tolerance.
For engineers reviewing the LTC2341CUH-18#TRPBF datasheet, LTC2341CUH-18#TRPBF pinout, LTC2341CUH-18#TRPBF application, or LTC2341CUH-18#TRPBF equivalent, key selection criteria include guaranteed 18-bit no-missing-codes performance, 105dB CMRR at 200Hz, programmable logic controller (PLC) signal chain compatibility, and thermal operation up to +70°C in the 5mm × 5mm QFN package.
Technical Context
The LTC2341CUH-18#TRPBF implements a successive approximation register (SAR) architecture with internal conversion clock and zero-cycle latency, enabling deterministic timing for real-time control loops. Its dual-channel simultaneous sampling eliminates inter-channel skew, critical for phase-sensitive measurements in motor control and power quality monitoring.
SoftSpan™ configuration is applied independently per channel on a conversion-by-conversion basis via SPI/LVDS interface, allowing mixed-mode acquisition (e.g., one bipolar ±4.096V channel and one unipolar 0–2.048V channel) without hardware reconfiguration. Input common mode range spans 0V to VDD (5V), supporting direct interfacing with op-amp drivers, isolated amplifiers, and sensor front-ends without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - guarantees full 262,144-code dynamic range with no missing codes across temperature. |
| Sampling Rate | 666ksps per channel (dual-channel simultaneous) - enables 1.5µs maximum cycle time for high-speed closed-loop feedback. |
| INL | ±4LSB max - ensures <±0.0015% full-scale linearity error for precision metrology-grade measurements. |
| SNR | 95dB typical (fIN = 2kHz, ±4.096V range) - delivers 15.8 effective bits (ENOB) in demanding noise-sensitive applications. |
| CMRR | 105dB typical at 200Hz - rejects common-mode interference from noisy industrial environments (e.g., VFD harmonics). |
| Power Dissipation | 74mW typical (CMOS mode, 2 channels active) - enables thermally constrained designs in dense PLC backplanes. |
| Operating Temperature | 0°C to +70°C - qualified for commercial/industrial control cabinet environments without forced cooling. |
Pinout & Package
Package: 32-lead (5mm × 5mm) plastic QFN (UH package); exposed pad (Pin 33) must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN0+, IN0– / IN1+, IN1– (Pins 8/7, 2/1) | Differential analog inputs, Channel 0 and Channel 1 | Simultaneously sampled; support 0V to 5V common-mode range and ±5V differential overdrive tolerance - eliminates need for external level shifters. |
| REFIN (Pin 10), REFBUF (Pin 12) | Internal reference input/output | REFIN outputs 2.048V bandgap; REFBUF provides buffered 4.096V master reference - bypassing with 0.1µF (REFIN) and 47µF (REFBUF) ceramics ensures low-noise conversion. |
| LVDS/CMOS (Pin 14) | I/O interface mode select | Ground = CMOS (1.8–5V logic); OVDD = LVDS - enables flexible host processor interfacing without level translators. |
| CNV (Pin 15) | Conversion start trigger | Rising-edge initiated; supports precise synchronization with external clocks or PWM timers in servo drives. |
| PD (Pin 13) | Power-down control | Active-high; reduces current to 65µA (C-grade) - enables energy-efficient sleep modes in battery-backed data loggers. |
| SDO0/SDO1, SCKO, SCKI, SDI, CS, BUSY (Pins 16–28) | Serial digital interface | Configurable 1- or 2-lane CMOS or LVDS output - allows trade-off between bus width and EMI robustness in noisy factory floors. |
Key Features
| Feature | Design Value |
|---|---|
| Dual simultaneous sampling | Eliminates channel-to-channel timing skew (<150ps matching), essential for vector-controlled motor drives and three-phase power analyzers. |
| Per-channel SoftSpan™ configuration | Independent range selection (±4.096V, 0–4.096V, etc.) per conversion - enables adaptive signal conditioning without FPGA or external MUX. |
| Rail-to-rail input overdrive tolerance | Withstands ±5V differential input beyond full-scale without damage or latch-up - simplifies protection circuitry in unpredictable field environments. |
| Integrated reference buffer (4.096V) | Removes need for external precision reference ICs and associated decoupling, reducing BOM count and layout area by ≥3 components. |
| 105dB CMRR at 200Hz | Rejects magnetic coupling from adjacent 50/60Hz power lines and variable-frequency drive (VFD) emissions in industrial enclosures. |
| Guaranteed operation to +70°C | Validated for continuous use in non-ventilated control cabinets - avoids derating or thermal throttling in harsh ambient conditions. |
Applications
| Programmable Logic Controllers (PLCs) | Industrial Process Control |
|---|---|
Use Scenario: Digitizing analog sensor outputs (4–20mA transmitters, RTDs, strain gauges) in modular I/O modules. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC capturing synchronized voltage/current pairs for real-time PID loop execution. Use Value: 666ksps throughput and ±4LSB INL ensure sub-0.01% measurement accuracy across temperature, meeting IEC 61000-4-3 immunity requirements. |
Use Scenario: Monitoring pressure, flow, and temperature in chemical plant DCS racks with high EMI exposure. IC Role / Device Role / Timing Role: High-CMRR differential front-end digitizing isolated sensor signals while rejecting ground-loop noise. Use Value: 105dB CMRR and rail-to-rail overdrive tolerance eliminate external instrumentation amplifiers and clamp diodes, reducing failure points. |
| Medical Imaging Signal Chain | High-Speed Data Acquisition Systems |
Use Scenario: Digitizing low-noise, low-amplitude signals from ultrasound transducer arrays or MRI gradient coils. IC Role / Device Role / Timing Role: Precision SAR ADC providing 95dB SNR and simultaneous sampling for beamforming coherence. Use Value: 18-bit no-missing-codes guarantee and 3psRMS aperture jitter preserve signal fidelity required for FDA Class II imaging compliance. |
Use Scenario: Capturing transient waveforms in power electronics validation (e.g., inverter switching artifacts, surge testing). IC Role / Device Role / Timing Role: Dual-channel acquisition engine synchronizing voltage and current measurements for loss analysis. Use Value: 22MHz –3dB input bandwidth and 210ns full-scale settling enable accurate capture of fast-edged switching events without aliasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision dual-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7606C-18 (Analog Devices) | 8-channel, 18-bit, 1MSPS, internal reference, parallel/serial interface; no SoftSpan™; requires external oversampling for equivalent noise floor. | Better channel density but lacks per-channel range flexibility; higher power (120mW) and larger 64-lead LQFP package. | Select when multi-channel consolidation outweighs range adaptability - e.g., compact DAQ modules needing >2 channels. |
| ADS8924B (Texas Instruments) | Single-channel, 18-bit, 1MSPS, 96.5dB SNR, SPI-only, no integrated reference buffer; requires external 4.096V reference. | Higher speed and SNR but no simultaneous dual-channel capability; unsuitable for phase-critical applications like motor control. | Select for single-ended, high-throughput applications where channel count is secondary - e.g., portable test equipment. |
Compared with AD7606C-18 and ADS8924B, the LTC2341CUH-18#TRPBF uniquely combines dual-channel simultaneity, per-channel SoftSpan™ configurability, and integrated reference buffer in a compact QFN - making it optimal for space-constrained, mixed-signal industrial controllers requiring adaptive input scaling without layout redesign.
Availability
LTC2341CUH-18#TRPBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and medical imaging signal chains requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC2341CUH-18#TRPBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2341-18 product line was designed specifically for high-accuracy, multi-channel industrial data acquisition - emphasizing simultaneous sampling integrity, flexible input range adaptation, and robust operation in electrically noisy environments.
FAQ
What is the maximum sampling rate of the LTC2341CUH-18#TRPBF when both channels are enabled?
The LTC2341CUH-18#TRPBF achieves 666ksps per channel with both channels simultaneously enabled. When only one channel is active, the maximum sampling rate increases to 1000ksps - enabling higher throughput in single-sensor monitoring applications while maintaining the same 18-bit resolution and timing determinism.
Does the LTC2341CUH-18#TRPBF require an external reference voltage?
No - the LTC2341CUH-18#TRPBF integrates a 2.048V bandgap reference (REFIN) and a buffered 4.096V master reference (REFBUF) that can be used directly. External overdrive is optional: REFIN accepts 1.25–2.2V, and REFBUF accepts 2.5–5V for enhanced accuracy or custom scaling.
How does the SoftSpan™ feature work on the LTC2341CUH-18#TRPBF?
SoftSpan™ allows independent, conversion-by-conversion configuration of each channel's input range (±4.096V, 0–4.096V, ±2.048V, or 0–2.048V) via SPI or LVDS command. This eliminates hardware reconfiguration and enables dynamic adaptation to varying sensor outputs within a single acquisition sequence.
What is the operating temperature range for the LTC2341CUH-18#TRPBF?
The LTC2341CUH-18#TRPBF is specified for 0°C to +70°C (Commercial grade, denoted by 'C' in the part number). This range covers standard industrial control cabinet environments without active cooling, and is validated across all electrical specifications including INL, SNR, and CMRR.
Can the LTC2341CUH-18#TRPBF interface directly with a 1.8V microcontroller?
Yes - the LTC2341CUH-18#TRPBF supports CMOS I/O mode with OVDD ranging from 1.71V to 5.25V. When OVDD = 1.8V, digital inputs accept 0.2×OVDD to 0.8×OVDD thresholds, and outputs drive compatible 1.8V logic levels - enabling direct connection to low-voltage MCUs without level shifters.
LTC2341CUH-18#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SoftSpan™
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 666k
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial, SPI
- Configuration:
- S/H-MUX-ADC
- Ratio - S/H:ADC:
- 1:1
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 32-QFN (5x5)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2341CUH-18#TRPBF FAQ
1.How can I place an order for LTC2341CUH-18#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2341CUH-18#TRPBF 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 LTC2341CUH-18#TRPBF reliable?
The price and inventory of LTC2341CUH-18#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2341CUH-18#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2341CUH-18#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2341CUH-18#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2341CUH-18#TRPBF?
LTC2341CUH-18#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2341CUH-18#TRPBF 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 LTC2341CUH-18#TRPBF?
For technical support, including LTC2341CUH-18#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2341CUH-18#TRPBF requirements.
6.How does Aetrix verify that LTC2341CUH-18#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2341CUH-18#TRPBF 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 LTC2341CUH-18#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2341CUH-18#TRPBF?
All LTC2341CUH-18#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2341CUH-18#TRPBF, 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 LTC2341CUH-18#TRPBF part is unused and in its original packaging.
Return procedure for LTC2341CUH-18#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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