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Analog Devices Inc. LTC2194CUKG#PBF
- Part No.:
- LTC2194CUKG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2194CUKG#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:577
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Product details
Overview
LTC2194CUKG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range RF/IF digitization at 105 Msps. It delivers 76.7 dB SNR, 90 dB SFDR, and ultralow 0.07 psRMS aperture jitter - enabling undersampling of 70 MHz cellular and SDR IF signals with minimal noise degradation. Its serial LVDS outputs, single 1.8 V supply, and 550 MHz full-power bandwidth support compact, low-power base station receiver front-ends.
For engineers reviewing the LTC2194CUKG#PBF datasheet, LTC2194CUKG#PBF pinout, LTC2194CUKG#PBF application, or LTC2194CUKG#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed alternative options for dual-channel 16-bit ADC migration, and real-world design implications of its 2-lane/4-lane LVDS serialization, internal clock duty cycle stabilizer, and ±2 LSB INL performance across temperature.
Technical Context
The LTC2194CUKG#PBF implements two independent 16-bit SAR-based ADC cores with shared reference and clock circuitry, supporting true simultaneous sampling critical for I/Q demodulation and beamforming. Its analog input stage features 550 MHz full-power bandwidth and programmable 1–2 VP-P differential range via the SENSE pin, with internal common-mode bias (VCM1/VCM2) and selectable internal/external reference modes.
Digital interface uses configurable serial LVDS: 1-, 2-, or 4-bit per channel output modes with optional on-chip 100 Ω termination and adjustable 1.75 mA / 3.5 mA output current. Control is handled via SPI-compatible serial port (CS/SCK/SDI/SDO) or parallel logic mode (via PAR/SER pin), supporting dynamic reconfiguration of output lane count, power modes (Nap/Sleep), and encode input configuration (differential or single-ended).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over 0°C to 70°C - guarantees monotonicity and full code coverage in precision measurement systems. |
| Sampling Rate | 105 Msps maximum - supports LTE-A carrier aggregation and wideband radar pulse capture without interpolation. |
| SNR / SFDR | 76.7 dB SNR and 90 dB SFDR at 70 MHz input - enables >12 effective bits in demanding communications receivers. |
| Aperture Jitter | 0.07 psRMS (differential encode) - limits sampling uncertainty to <0.05° phase error at 100 MHz, preserving EVM in QAM-1024 systems. |
| Power Consumption | 360 mW total at 105 Msps (2-lane, 1.75 mA LVDS) - reduces thermal load in dense multi-ADC arrays and portable medical imaging platforms. |
| Analog Input BW | 550 MHz full-power bandwidth - allows direct digitization of L-band and S-band IF signals without external amplification. |
| INL / DNL | ±2 LSB INL and ±0.5 LSB DNL (typ) - ensures accurate amplitude fidelity in ultrasound beamforming and spectral analysis applications. |
Pinout & Package
52-pin (7 mm × 8 mm) plastic QFN package with exposed thermal pad (Pin 53 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM1 (1) | Channel 1 analog input common-mode bias | Nominally VDD/2; must be bypassed with 0.1 µF capacitor to enable proper differential input operation for AIN1±. |
| AIN1+, AIN1– (3,4) | Channel 1 differential analog input pair | Accepts 1–2 VP-P differential signal; CMRR = 80 dB ensures rejection of board-level noise coupling. |
| ENC+, ENC– (17,18) | Differential encode clock inputs | Supports sine wave, PECL, LVDS, TTL, or CMOS drive; internal duty cycle stabilizer maintains performance across 40–60% duty cycles. |
| OUT1A+/– to OUT1D+/– (37–44) | Channel 1 serialized LVDS data outputs | Configurable 1/2/4-lane mode; each pair delivers 2-bit or 4-bit nibbles synchronized to DCO+/- and FR+/- framing signals. |
| DCO+, DCO– (35,36) | Data clock output | LVDS clock aligned to serialized data edges; used for synchronous capture in FPGA-based digital downconverters. |
| FR+, FR– (31,32) | Frame start output | Indicates start of new sample frame across both channels - essential for time-aligned I/Q processing and TDD synchronization. |
| PAR/SER (10) | Programming mode select | Ground = serial SPI control; VDD = parallel logic mode - determines whether CS/SCK/SDI configure full functionality or only lane/output settings. |
Key Features
| Feature | Design Value |
|---|---|
| Simultaneous dual-channel sampling | Enables coherent I/Q signal capture with <1 ps inter-channel skew - critical for zero-IF receivers and phased-array radar calibration. |
| Serial LVDS with programmable lanes | Reduces interface routing by up to 75% vs parallel CMOS; 4-lane mode supports 105 Msps with 262.5 MB/s per channel throughput. |
| Internal clock duty cycle stabilizer | Eliminates need for external clock conditioning circuitry - simplifies system clock tree and improves jitter margin in noisy industrial environments. |
| Selectable input range (1–2 VP-P) | Allows optimization for low-noise preamp stages or high-SNR mixer outputs without external gain adjustment or attenuation networks. |
| Low-power Nap and Sleep modes | Reduces power to 50 mW (Nap) or 1 mW (Sleep) - extends battery life in portable ultrasound and handheld spectrum analyzers during idle periods. |
Applications
| Cellular Base Station Receiver | Software-Defined Radio (SDR) |
|---|---|
Use Scenario: Digitizing dual-path 70 MHz IF signals from quadrature downconverters in macrocell LTE eNodeB units. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing time-aligned I/Q samples for digital downconversion and MIMO channel estimation. Use Value: 90 dB SFDR prevents adjacent-channel interference masking weak user signals; 0.07 psRMS jitter preserves EVM below 2.5% at 256-QAM. |
Use Scenario: Reconfigurable wideband front-end in military SATCOM terminals supporting multiple waveform standards (e.g., WNW, SRW, Link 16). IC Role / Device Role / Timing Role: High-fidelity digitizer capturing 100+ MHz instantaneous bandwidth with deterministic latency for real-time waveform switching. Use Value: 550 MHz analog bandwidth enables direct IF sampling up to S-band; SPI configurability allows runtime adaptation of LVDS lane count and power state. |
| Portable Medical Ultrasound | Multi-Channel Data Acquisition |
Use Scenario: Beamformed echo digitization in handheld ultrasound probes with 64+ element transducer arrays. IC Role / Device Role / Timing Role: Dual-channel ADC per receive path delivering synchronized samples for digital beamforming and harmonic imaging. Use Value: ±2 LSB INL ensures accurate tissue contrast representation; 360 mW total power enables battery-operated 30-minute scan sessions. |
Use Scenario: High-precision vibration monitoring in wind turbine gearboxes using 8-channel synchronized acquisition. IC Role / Device Role / Timing Role: Precision ADC subsystem capturing phase-coherent acceleration waveforms across multiple sensor axes for FFT-based fault detection. Use Value: Simultaneous sampling eliminates inter-channel phase error; 76.7 dB SNR resolves sub-millig acceleration levels in low-RPM bearing defect analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 16-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9653BCPZ-105 | 16-bit, 105 Msps, dual-channel; JESD204B interface instead of LVDS; higher 430 mW power; ±1.25 LSB INL. | Requires FPGA with JESD204B PHY; better suited for high-channel-count systems needing deterministic latency and lane alignment. | Choose AD9653BCPZ-105 when migrating to JESD204B-based architectures or requiring tighter inter-channel skew (<0.3 ps). |
| ADS52J90IRGCT | 16-bit, 100 Msps, quad-channel; LVDS interface; 450 mW power; 75.5 dB SNR at 70 MHz; requires external reference. | Provides 2× channel count in same footprint; lower SNR limits dynamic range in high-order modulation schemes. | Choose ADS52J90IRGCT when expanding to 4-channel I/Q or IQIQ topologies without increasing board area. |
Compared with LTC2194CUKG#PBF, AD9653BCPZ-105 offers superior interface scalability but demands more complex FPGA integration, while ADS52J90IRGCT trades 1.2 dB SNR for double channel density - making LTC2194CUKG#PBF optimal for cost-sensitive, space-constrained dual-channel RF digitizers prioritizing jitter and SNR.
Availability
LTC2194CUKG#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio, and portable medical imaging applications requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for LTC2194CUKG#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 aerospace, communications, industrial, and healthcare markets.
The LTC2194CUKG#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for RF/IF digitization in communications infrastructure where SNR, SFDR, and aperture jitter directly impact spectral efficiency and modulation accuracy.
FAQ
What is the operating temperature range for the LTC2194CUKG#PBF?
The LTC2194CUKG#PBF is specified for commercial temperature operation from 0°C to 70°C. This grade is validated for use in indoor base stations, lab-grade test equipment, and portable medical devices where ambient thermal conditions remain within this envelope. The 'C' suffix explicitly denotes the 0°C to 70°C range, distinct from the industrial-grade 'I' variant rated for –40°C to 85°C.
Does the LTC2194CUKG#PBF support single-ended encode clock inputs?
Yes, the LTC2194CUKG#PBF supports single-ended encode operation: tie ENC– to GND and drive ENC+ with a 1.8 V square wave or sine wave. In this mode, aperture jitter increases slightly to 0.09 psRMS, and the device retains full 105 Msps capability and all DC/AC specifications - enabling simplified clocking in cost-sensitive SDR and instrumentation designs.
How many LVDS data lanes does the LTC2194CUKG#PBF use by default?
The LTC2194CUKG#PBF defaults to 2-lane LVDS output mode after power-up, delivering two 2-bit nibbles per channel per sample period. Lane count is configurable via SPI register writes or parallel logic (CS/SCK pins) to 1-lane (1 bit per channel) or 4-lane (4 bits per channel) modes - allowing trade-offs between FPGA pin count, timing margin, and PCB routing complexity.
Can the LTC2194CUKG#PBF operate with an external reference voltage?
Yes, the LTC2194CUKG#PBF supports external reference operation: apply a stable 0.625 V to 1.3 V voltage to the SENSE pin to set the input range to ±0.8 × VSENSE. When using external reference, REFL and REFH pins become high-impedance, and the internal reference buffer is disabled - enabling optimized noise performance with ultra-low-drift external references in metrology-grade DAQ systems.
What is the pipeline latency of the LTC2194CUKG#PBF?
The LTC2194CUKG#PBF has a fixed pipeline latency of 7 clock cycles from encode edge to valid LVDS data output. This deterministic delay is identical across all serialization modes (1/2/4-lane) and temperature ranges, enabling precise timing budgeting in FPGA-based digital downconverters and real-time control loops that depend on consistent sample-to-result latency.
LTC2194CUKG#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-WFQFN Exposed Pad
- Packaging:
- Tube
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2194CUKG#PBF FAQ
1.How can I place an order for LTC2194CUKG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2194CUKG#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 LTC2194CUKG#PBF reliable?
The price and inventory of LTC2194CUKG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2194CUKG#PBF is usually 5 days.
3.What payment methods are accepted for LTC2194CUKG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2194CUKG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2194CUKG#PBF?
LTC2194CUKG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2194CUKG#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 LTC2194CUKG#PBF?
For technical support, including LTC2194CUKG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2194CUKG#PBF requirements.
6.How does Aetrix verify that LTC2194CUKG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2194CUKG#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 LTC2194CUKG#PBF meets industry standards.
7.What is the process for return or replacement of LTC2194CUKG#PBF?
All LTC2194CUKG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2194CUKG#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 LTC2194CUKG#PBF part is unused and in its original packaging.
Return procedure for LTC2194CUKG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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