Analog Devices Inc. LTC2193CUKG#PBF

Overview

LTC2193CUKG#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 at 80Msps. It delivers 76.5dB SNR, 90dB SFDR, and ultralow 0.07psRMS jitter-enabling undersampling of IF signals in communications infrastructure. Its serial LVDS outputs, 1.8V single-supply operation, and 550MHz full-power bandwidth make it suitable for portable medical imaging and multi-channel data acquisition systems.

For engineers reviewing the LTC2193CUKG#PBF datasheet, LTC2193CUKG#PBF pinout, LTC2193CUKG#PBF application, or LTC2193CUKG#PBF equivalent, key selection criteria include guaranteed ±2LSB INL (typ), 2-lane/4-lane LVDS serialization flexibility, internal clock duty cycle stabilization, shutdown/nap modes for power management, and QFN-52 (7mm × 8mm) package compatibility with high-density RF layouts.

Technical Context

The LTC2193CUKG#PBF implements two independent 16-bit ADC cores with shared analog front-end biasing (VCM1/VCM2) and differential sample-and-hold stages featuring 550MHz full-power bandwidth. Its architecture supports both internal and external reference configurations via the SENSE pin, enabling selectable 1VP-P to 2VP-P input ranges.

Digital interface logic includes SPI-configurable serialization (1/2/4 bits per channel), programmable LVDS output current (1.75mA/3.5mA), on-chip 100Ω termination, and frame/data clock outputs (FR+/FR–, DCO+/DCO–) synchronized to sampling edges. The ENC+/ENC– inputs accept differential or single-ended clocks with duty cycle stabilization active across 2–100% range.

Key Specifications

Pinout & Package

Package: 52-lead plastic QFN (7mm × 8mm), exposed pad (Pin 53) soldered to PCB ground for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 16-bit ADC applications.

Compared with LTC2193CUKG#PBF, AD9269BCPZ-80 provides greater analog bandwidth at higher power and complexity, while LTC2263IUKG#PBF reduces cost and power by eliminating the second channel and synchronization features-making LTC2193CUKG#PBF optimal for phase-coherent dual-path systems demanding minimal jitter and integrated clock management.

Availability

LTC2193CUKG#PBF is available at Aetrix Electronics and suitable for cellular base stations, portable medical imaging, and multi-channel data acquisition systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2193CUKG#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 communications, industrial, automotive, and healthcare markets.

The LTC2193CUKG#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding RF and instrumentation applications requiring simultaneous sampling, low jitter, and flexible digital interfacing in compact form factors.

FAQ

What is the maximum sampling rate supported by the LTC2193CUKG#PBF?

The LTC2193CUKG#PBF supports a maximum sampling rate of 80Msps, as specified in its speed grade designation within the LTC2193 family. This rate is validated across the full operating temperature range (0°C to 70°C) and applies to both channels simultaneously with guaranteed AC performance including 76.5dB SNR and 90dB SFDR at 70MHz input frequency. Higher rates are not supported-LTC2194 and LTC2195 variants are rated for 105Msps and 125Msps respectively.

Does the LTC2193CUKG#PBF require an external reference voltage?

No, the LTC2193CUKG#PBF does not require an external reference voltage. It includes an internal 1.25V reference (VREF pin) and supports three reference configurations via the SENSE pin: grounded (±0.5V input range), tied to VDD (±1V range), or driven with an external voltage between 0.625V and 1.3V (±0.8×VSENSE range). External references are optional and only needed when higher accuracy or custom scaling is required beyond internal capability.

How many LVDS data lanes does the LTC2193CUKG#PBF support per channel?

The LTC2193CUKG#PBF supports 1, 2, or 4 LVDS data lanes per channel, selected via the CS and SCK pins in parallel programming mode or through SPI register writes in serial mode. In 1-lane mode, only OUTxA+/OUTxA– are active; in 2-lane mode, OUTxA+/OUTxA– and OUTxB+/OUTxB– carry time-interleaved bits; in 4-lane mode, all four differential pairs (A–D) per channel are used-reducing data rate per lane and easing timing closure on dense PCBs.

What is the purpose of the FR+ and FR– pins on the LTC2193CUKG#PBF?

The FR+ and FR– pins on the LTC2193CUKG#PBF provide a differential frame start signal that asserts at the beginning of each new conversion frame. This signal synchronizes data capture across multiple LTC2193CUKG#PBF devices or with downstream logic (e.g., FPGA FIFO write enable), ensuring deterministic latency and eliminating frame boundary ambiguity in multi-ADC systems used for beamforming or I/Q processing.

Can the LTC2193CUKG#PBF operate with a single-ended clock input?

Yes, the LTC2193CUKG#PBF can operate with a single-ended clock input by tying the ENC– pin to GND and driving ENC+ with a square wave (TTL, CMOS, or PECL-compatible). In this mode, sampling is triggered on the rising edge of ENC+, and the internal duty cycle stabilizer remains active to maintain performance across varying input duty cycles-enabling compatibility with standard logic clocks without external conditioning circuitry.