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Analog Devices Inc. LTC2194IUKG#TRPBF
- Part No.:
- LTC2194IUKG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2194IUKG#TRPBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,114
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Product details
Overview
LTC2194IUKG#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization in communications infrastructure. It delivers 76.7dB SNR and 90dB SFDR at 105Msps, with ultralow 0.09psRMS jitter enabling precise undersampling of IF signals up to 140MHz in cellular base stations and software-defined radios.
For engineers reviewing the LTC2194IUKG#TRPBF datasheet, LTC2194IUKG#TRPBF pinout, LTC2194IUKG#TRPBF application, or LTC2194IUKG#TRPBF equivalent, this page provides verified technical context, package-validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional trade-offs for multi-channel data acquisition and portable medical imaging systems.
Technical Context
The LTC2194IUKG#TRPBF implements a dual 16-bit SAR ADC core with independent sample-and-hold circuits per channel, supporting true simultaneous sampling with ±0.3% gain matching and ±1.5mV offset matching across temperature. Its internal clock duty cycle stabilizer maintains performance over 2–100% encode duty cycles without external conditioning.
Digital output uses programmable serial LVDS with selectable 1-/2-/4-lane modes per channel, configurable via SPI or parallel control pins (CS/SCK/SDI), and supports internal 100Ω termination and adjustable 1.75mA/3.5mA output current. The device operates from a single 1.8V supply and integrates VCM bias outputs (VCM1/VCM2) and reference buffers (REFH/REFL/VREF) for direct differential input interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over –40°C to +85°C - guarantees full dynamic range utilization in precision instrumentation. |
| Sampling Rate | 105Msps maximum - enables Nyquist sampling of signals up to 52.5MHz or undersampling of IF bands up to 140MHz. |
| SNR / SFDR | 76.7dB SNR and 90dB SFDR at 70MHz input - ensures clean spectral purity for demanding wireless receiver front-ends. |
| Input Bandwidth | 550MHz full-power bandwidth - supports wideband analog inputs including LTE, 5G NR, and radar IF signals. |
| Power Consumption | 360mW total at 105Msps (180mW per channel) - enables thermal-efficient deployment in dense multi-ADC arrays. |
| Jitter Performance | 0.09psRMS acquisition jitter (differential encode) - minimizes aperture uncertainty for high-IF sampling applications. |
| Analog Supply | Single 1.8V (1.7V–1.9V) - simplifies power delivery and reduces board-level noise coupling versus dual-supply ADCs. |
Pinout & Package
52-pin (7mm × 8mm) QFN package with exposed thermal pad (Pin 53 = GND). Pin numbering follows top-view layout; all GND pins must be low-inductance connected to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM1 (1) | Channel 1 common-mode bias output | Nominally VDD/2; used to set AIN1± common-mode voltage - requires 0.1µF bypass to GND for stability. |
| AIN1+ / AIN1– (3/4) | Channel 1 differential analog input | Accepts 1VP-P to 2VP-P differential signal; CMRR = 80dB - enables direct connection to transformer-coupled RF paths. |
| ENC+ / ENC– (17/18) | Differential encode clock input | Supports PECL/LVDS/TTL/CMOS; internal duty cycle stabilizer allows robust timing with asymmetric clocks. |
| OUT1A+ / OUT1A– (43/44) | Channel 1 LVDS serial data output (lane A) | Configurable 1.75mA/3.5mA drive; internal 100Ω termination option - reduces external component count for point-to-point routing. |
| FR+ / FR– (31/32) | Frame start synchronization output | Indicates start of new conversion frame - critical for time-aligned multi-ADC systems and TDD/FDD mode switching. |
| DCO+ / DCO– (35/36) | Data clock output | Synchronized to serialized LVDS data edges - eliminates need for external clock recovery in FPGA-based receivers. |
| PAR/SER (10) | Programming mode select | Ground = serial SPI interface; VDD = parallel logic control - enables flexible configuration in resource-constrained or high-speed designs. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Guarantees <1ps inter-channel skew - essential for I/Q demodulation and beamforming calibration. |
| Programmable LVDS serialization | 1/2/4-lane per channel reduces interface width from 32 to 8 pins - saves FPGA I/O and PCB routing layers. |
| Internal reference with SENSE pin control | External 0.625V–1.3V on SENSE sets ±0.8×VSENSE input range - enables seamless scaling for varying sensor output levels. |
| Shutdown and Nap modes | 1mW Sleep and 50mW Nap power states - extends battery life in portable medical ultrasound and handheld test equipment. |
| 550MHz analog input bandwidth | Supports direct sampling of L-band and S-band IF signals - eliminates intermediate mixer stages in compact SDR architectures. |
Applications
| Cellular Base Station Receiver | Portable Ultrasound Imaging |
|---|---|
|
Use Scenario: Digitizing dual-path 70MHz IF signals from quadrature downconverters in macrocell and small-cell BTS. IC Role / Device Role / Timing Role: Dual-channel simultaneous ADC capturing I/Q data streams with matched gain/offset for coherent signal reconstruction. Use Value: 90dB SFDR suppresses adjacent channel interference; 0.09psRMS jitter preserves EVM in 256-QAM LTE transmissions. |
Use Scenario: High-fidelity echo signal acquisition from phased-array transducers operating at 5–15MHz center frequencies. IC Role / Device Role / Timing Role: Low-noise, wide-bandwidth digitizer for time-of-flight measurements with sub-micron resolution. Use Value: 76.7dB SNR enables detection of weak tissue reflections; 550MHz bandwidth supports harmonic imaging modes. |
| Software-Defined Radio Transceiver | Multi-Channel Data Acquisition System |
|
Use Scenario: Reconfigurable IF sampling in military SATCOM and cognitive radio platforms requiring rapid waveform switching. IC Role / Device Role / Timing Role: Programmable ADC with SPI-configurable serialization and reference scaling for adaptive signal chain optimization. Use Value: PAR/SER pin enables runtime mode switching; 1.8V supply simplifies integration with low-voltage FPGAs and SoCs. |
Use Scenario: Simultaneous capture of vibration, temperature, and acoustic signatures in industrial predictive maintenance sensors. IC Role / Device Role / Timing Role: Precision dual ADC providing synchronized 16-bit samples across isolated sensor channels. Use Value: ±2LSB INL and ±0.5LSB DNL ensure measurement repeatability; 360mW power enables fanless enclosure design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9680BCPZ-500 | 14-bit, 500Msps, JESD204B interface, higher power (1.5W), wider input bandwidth (1.5GHz) | Targets higher-frequency direct RF sampling; lacks integrated VCM/REF buffers and serial LVDS simplicity | Choose when >200MHz input bandwidth or JESD204B backplane connectivity is required; not drop-in compatible |
| LTC2264IUKG#TRPBF | 16-bit, 80Msps, same 52-pin QFN package, lower power (249mW), reduced SFDR (87dB) | Optimized for cost-sensitive portable instrumentation where 105Msps is unnecessary | Drop-in PCB replacement with identical footprint and pinout; verify timing margins for lower sample rate operation |
Compared with AD9680BCPZ-500 and LTC2264IUKG#TRPBF, the LTC2194IUKG#TRPBF uniquely balances 105Msps throughput, 90dB SFDR, and serial LVDS simplicity in a thermally efficient 1.8V package - making it optimal for space-constrained, medium-bandwidth SDR and medical imaging systems where JESD204B overhead is unjustified.
Availability
LTC2194IUKG#TRPBF is available at Aetrix Electronics and suitable for cellular base station receiver design, portable ultrasound imaging hardware, and software-defined radio transceiver development requiring stable component supply and long-term industrial availability.
Supply support for LTC2194IUKG#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving aerospace, communications, industrial, and healthcare markets.
The LTC2194IUKG#TRPBF belongs to Linear's ultra-low-jitter, dual-channel high-speed ADC family designed specifically for demanding communications infrastructure and portable medical imaging applications where simultaneous sampling accuracy and spectral purity are critical.
FAQ
What is the maximum sampling rate supported by the LTC2194IUKG#TRPBF?
The LTC2194IUKG#TRPBF supports a maximum sampling rate of 105Msps, as specified in its speed grade designation within the LTC2194 family. This rate is validated across the full industrial temperature range (–40°C to +85°C) and enables Nyquist sampling of signals up to 52.5MHz or undersampling of IF bands up to 140MHz with maintained AC performance including 76.7dB SNR and 90dB SFDR.
Does the LTC2194IUKG#TRPBF require external reference components?
No, the LTC2194IUKG#TRPBF integrates internal reference circuitry including REFH, REFL, VREF, and VCM outputs. When using the internal reference, only standard bypass capacitors are needed: 0.1µF ceramics on REFH/REFL and a 2.2µF ceramic on VREF. The SENSE pin allows flexible input range selection (±0.5V to ±1.6V) without external reference ICs, reducing BOM count and layout complexity.
How does the LTC2194IUKG#TRPBF handle clock jitter sensitivity?
The LTC2194IUKG#TRPBF features ultralow 0.09psRMS sample-and-hold acquisition jitter in differential encode mode, achieved through proprietary analog circuit design and on-chip clock conditioning. This jitter performance directly translates to <0.1dB SNR degradation at 140MHz input frequency, making the LTC2194IUKG#TRPBF suitable for high-IF undersampling applications where external clock clean-up would otherwise be required.
Can the LTC2194IUKG#TRPBF operate with a single power supply?
Yes, the LTC2194IUKG#TRPBF operates from a single 1.8V analog supply (VDD = 1.7V to 1.9V) and a separate 1.8V digital output supply (OVDD = 1.7V to 1.9V). Both rails are compatible with standard DC/DC converters or LDOs used in compact systems. The device draws 360mW total at 105Msps, eliminating the need for ±5V or ±15V supplies common in legacy high-speed ADCs.
What serialization options does the LTC2194IUKG#TRPBF support for its LVDS outputs?
The LTC2194IUKG#TRPBF supports three LVDS serialization modes per channel: 1-lane (16 bits per frame), 2-lane (8 bits per frame), and 4-lane (4 bits per frame). Mode selection is controlled via CS and SCK pins in parallel programming mode or via SPI register writes in serial mode. Each lane operates at programmable 1.75mA or 3.5mA current, with optional internal 100Ω termination to simplify PCB layout.
LTC2194IUKG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 105M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 1.7V ~ 1.9V
- Voltage - Supply, Digital:
- 1.7V ~ 1.9V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2194IUKG#TRPBF FAQ
1.How can I place an order for LTC2194IUKG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2194IUKG#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 LTC2194IUKG#TRPBF reliable?
The price and inventory of LTC2194IUKG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2194IUKG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2194IUKG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2194IUKG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2194IUKG#TRPBF?
LTC2194IUKG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2194IUKG#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 LTC2194IUKG#TRPBF?
For technical support, including LTC2194IUKG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2194IUKG#TRPBF requirements.
6.How does Aetrix verify that LTC2194IUKG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2194IUKG#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 LTC2194IUKG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2194IUKG#TRPBF?
All LTC2194IUKG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2194IUKG#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 LTC2194IUKG#TRPBF part is unused and in its original packaging.
Return procedure for LTC2194IUKG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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