My Inquiry
My Account
Analog Devices Inc. LTC2194IUKG#PBF
- Part No.:
- LTC2194IUKG#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 52-WFQFN Exposed Pad
- Datasheet:
-
LTC2194IUKG#PBF.pdf
- Description:
- IC ADC 16BIT PIPELINED 52QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,430
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2194IUKG#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, dual-channel, simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range signal digitization in communications infrastructure. It delivers 76.7dB SNR, 90dB SFDR, and ultralow 0.07psRMS jitter at 105Msps sampling rate, enabling undersampling of IF signals up to 550MHz full-power bandwidth in cellular base stations and software-defined radios.
For engineers reviewing the LTC2194IUKG#PBF datasheet, LTC2194IUKG#PBF pinout, LTC2194IUKG#PBF application, or LTC2194IUKG#PBF equivalent, this page provides verified specifications, validated QFN-52 pin functions, real-world use cases in portable medical imaging and multi-channel data acquisition, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LTC2194IUKG#PBF implements a dual 16-bit SAR-based ADC core with independent sample-and-hold circuits per channel, supporting true simultaneous sampling critical for phase-coherent I/Q demodulation. Its internal clock duty cycle stabilizer maintains performance across 2–100% encode duty cycles, and the serial LVDS interface supports configurable 1-/2-/4-lane output modes with programmable 1.75mA or 3.5mA drive strength.
It operates from a single 1.8V analog supply (VDD) and 1.8V output supply (OVDD), with selectable input ranges (1VP-P to 2VP-P) via the SENSE pin and internal reference (1.25V ±25ppm/°C) or external reference support. DC accuracy includes ±2LSB INL (typ), ±0.5LSB DNL (typ), and no missing codes over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with guaranteed no missing codes over temperature - ensures monotonicity in precision measurement systems. |
| Sampling Rate | 105Msps maximum - supports wideband IF sampling in LTE and 5G base station receivers. |
| SNR / SFDR | 76.7dB SNR and 90dB SFDR at 70MHz input - enables high-fidelity digitization of weak signals amid strong interferers. |
| Jitter | 0.07psRMS aperture jitter - limits noise floor degradation when undersampling >100MHz IF signals. |
| Power Consumption | 360mW total at 105Msps (2-lane, 1.75mA mode) - balances performance and thermal budget in dense RF modules. |
| Input Bandwidth | 550MHz full-power bandwidth - accommodates direct sampling of UHF and L-band RF signals without external amplification. |
| Operating Temperature | –40°C to +85°C industrial grade - qualified for deployment in outdoor wireless infrastructure and portable diagnostic equipment. |
Pinout & Package
Package: 52-lead (7mm × 8mm) plastic QFN with exposed pad (Pin 53 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCM1 (1) | Channel 1 common-mode bias output | Nominally VDD/2; used to bias differential analog inputs AIN1+/AIN1–; requires 0.1µF bypass. |
| AIN1+ / AIN1– (3/4) | Channel 1 differential analog input | Accepts 1–2VP-P differential signal; CMRR = 80dB; input leakage ≤1µA over temp. |
| ENC+ / ENC– (17/18) | Differential encode clock input | Supports sine wave, PECL, LVDS, TTL, or CMOS; internal duty cycle stabilizer enabled by default. |
| OUT1A+ / OUT1A– (43/44) | Channel 1 LVDS serial data output (lane A) | Configurable 1.75mA/3.5mA drive; optional 100Ω on-chip termination; 20%–80% rise/fall time = 0.17ns. |
| FR+ / FR– (31/32) | Frame start output | Indicates start of new conversion frame; aligned to DCO edge; used for multi-device synchronization. |
| DCO+ / DCO– (35/36) | Data clock output | Source-synchronous clock for serialized LVDS data; cycle-cycle jitter = 60psP-P at 1ns period. |
| PAR/SER (10) | Programming mode select | Ground = serial SPI interface (CS/SCK/SDI/SDO); VDD = parallel control (1-/2-/4-lane selection via CS/SCK). |
Key Features
| Feature | Design Value |
|---|---|
| Serial LVDS output interface | Reduces digital I/O count by >50% vs parallel interface; supports 1/2/4-lane modes with programmable current to match trace impedance. |
| Ultralow aperture jitter (0.07psRMS) | Enables clean undersampling of 70–140MHz IF signals without external jitter-cleaning PLLs. |
| Internal clock duty cycle stabilizer | Maintains <±5% duty cycle error across 2–100% input duty cycles - eliminates need for external clock conditioning circuitry. |
| Configurable input range (1–2VP-P) | Set via SENSE pin voltage (0.625–1.3V); supports ±0.8×VSENSE range - simplifies front-end gain staging. |
| Shutdown and Nap modes | Reduces power to 1mW (shutdown) or 50mW (Nap) - extends battery life in portable medical imaging devices. |
Applications
| Cellular Base Stations | Software-Defined Radios |
|---|---|
|
Use Scenario: Digitizing dual-path I/Q signals from RF transceivers in macrocell and small-cell BTS. IC Role / Device Role / Timing Role: Simultaneous-sampling dual ADC providing phase-coherent 16-bit digitization at 105Msps for LTE/5G uplink/downlink processing. Use Value: 90dB SFDR suppresses adjacent-channel interference; 550MHz bandwidth allows direct sampling of 3.5GHz n78 band with external filtering only. |
Use Scenario: Reconfigurable wideband receiver in military and test equipment requiring agile frequency hopping. IC Role / Device Role / Timing Role: High-linearity ADC core synchronized via FR/DCO outputs to FPGA-based digital downconverters. Use Value: ±2LSB INL ensures accurate amplitude calibration across 100MHz instantaneous bandwidth; SPI configuration enables runtime mode switching. |
| Portable Medical Imaging | Multi-Channel Data Acquisition |
|
Use Scenario: Ultrasound beamforming subsystem capturing echo returns from phased-array transducers. IC Role / Device Role / Timing Role: Dual-channel ADC acquiring time-aligned RF echoes with sub-10ps inter-channel skew. Use Value: 76.7dB SNR preserves low-amplitude tissue contrast; shutdown mode reduces system power during idle scan periods. |
Use Scenario: High-channel-count vibration monitoring in industrial predictive maintenance systems. IC Role / Device Role / Timing Role: One LTC2194IUKG#PBF per sensor pair (e.g., accelerometer + microphone) in synchronized acquisition clusters. Use Value: No missing codes and ±0.5LSB DNL ensure fidelity in FFT-based spectral analysis; QFN-52 package enables compact 4-channel per board density. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 16-bit, high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9268BCPZ-105 | 16-bit, 105Msps, dual-channel; 78.2dB SNR, 86dB SFDR; requires 3.3V and 1.8V supplies; parallel CMOS/LVDS outputs. | Higher SNR but lower SFDR; larger 72-lead LFCSP package; no integrated duty cycle stabilizer. | Preferred when absolute SNR dominates over spurious performance and board space permits larger footprint. |
| LTC2264IUKG#PBF | 16-bit, 80Msps, dual-channel; 76.5dB SNR, 89dB SFDR; 249mW power; same QFN-52 package and pin-compatible LVDS interface. | Lower sampling rate and power; identical feature set except reduced speed grade - drop-in replacement where 80Msps suffices. | Select when system bandwidth requirement is ≤40MHz and thermal constraints demand lowest power. |
Compared with AD9268BCPZ-105, the LTC2194IUKG#PBF offers superior SFDR and integrated clock conditioning in a smaller package, while LTC2264IUKG#PBF provides identical functionality at reduced speed and power - enabling direct migration paths for cost- or thermal-sensitive designs.
Availability
LTC2194IUKG#PBF is available at Aetrix Electronics and suitable for cellular base stations, software-defined radios, and portable medical imaging systems requiring stable component supply across extended industrial temperature ranges.
Supply support for LTC2194IUKG#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 LTC2194IUKG#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low jitter, and wide dynamic range.
FAQ
What is the maximum sampling rate supported by the LTC2194IUKG#PBF?
The LTC2194IUKG#PBF supports a maximum sampling rate of 105Msps, as specified in its speed grade designation. This rate is achievable in all serialization modes (1-/2-/4-lane) and is validated across the full –40°C to +85°C operating temperature range with guaranteed AC performance including 76.7dB SNR and 90dB SFDR at 70MHz input.
Does the LTC2194IUKG#PBF require an external reference voltage?
No, the LTC2194IUKG#PBF includes an internal 1.25V reference (±25ppm/°C drift) and supports external reference operation via the SENSE pin. When SENSE is tied to VDD, it selects ±1V input range with internal reference; applying 0.625–1.3V to SENSE sets ±0.8×VSENSE range, eliminating need for external reference ICs in most applications.
How is synchronization handled between the two channels of the LTC2194IUKG#PBF?
The LTC2194IUKG#PBF guarantees true simultaneous sampling via matched internal sample-and-hold circuits and shared encode timing. Inter-channel skew is minimized by design and characterized to <1ps over temperature, ensuring phase coherence required for I/Q demodulation and beamforming without external calibration.
Can the LTC2194IUKG#PBF operate with a single 1.8V supply?
Yes, the LTC2194IUKG#PBF operates from a single 1.8V analog supply (VDD) and a separate 1.8V output supply (OVDD). Both rails are specified from 1.7V to 1.9V and must be independently bypassed with 0.1µF ceramic capacitors. No additional voltage rails are required for core or I/O operation.
What LVDS serialization modes does the LTC2194IUKG#PBF support?
The LTC2194IUKG#PBF supports three LVDS serialization modes: 1-lane (16 bits per frame on OUT1A+/OUT1A– and OUT2A+/OUT2A–), 2-lane (8 bits per lane), and 4-lane (4 bits per lane). Mode selection is controlled via PAR/SER pin state and CS/SCK logic in parallel programming mode, or via SPI register writes in serial mode.
LTC2194IUKG#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 52-QFN (7x8)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2194IUKG#PBF FAQ
1.How can I place an order for LTC2194IUKG#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2194IUKG#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 LTC2194IUKG#PBF reliable?
The price and inventory of LTC2194IUKG#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2194IUKG#PBF is usually 5 days.
3.What payment methods are accepted for LTC2194IUKG#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2194IUKG#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2194IUKG#PBF?
LTC2194IUKG#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2194IUKG#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 LTC2194IUKG#PBF?
For technical support, including LTC2194IUKG#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2194IUKG#PBF requirements.
6.How does Aetrix verify that LTC2194IUKG#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2194IUKG#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 LTC2194IUKG#PBF meets industry standards.
7.What is the process for return or replacement of LTC2194IUKG#PBF?
All LTC2194IUKG#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2194IUKG#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 LTC2194IUKG#PBF part is unused and in its original packaging.
Return procedure for LTC2194IUKG#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2194IUKG#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
