Analog Devices Inc. LTC2207CUK-14#PBF

Overview

LTC2207CUK-14#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 105Msps pipeline analog-to-digital converter optimized for high-frequency, wide-dynamic-range signal digitization up to 700MHz full-power bandwidth. It features 77.3dBFS SNR, 98dBc SFDR at 5MHz, 80fsRMS aperture jitter, and a programmable PGA front end supporting 1.5VP-P or 2.25VP-P input ranges - deployed in cellular base station receivers and spectrum analyzers.

For engineers reviewing the LTC2207CUK-14#PBF datasheet, LTC2207CUK-14#PBF pinout, LTC2207CUK-14#PBF application, or LTC2207CUK-14#PBF equivalent, key selection criteria include undersampling capability at >250MHz input frequencies, CMOS output voltage flexibility (0.5V–3.6V), clock duty cycle stabilization, and guaranteed no missing codes over 0°C to 70°C operation.

Technical Context

The LTC2207CUK-14#PBF employs a 7-stage pipeline ADC architecture with integrated sample-and-hold, internal 1.25V common-mode bias (VCM), and differential analog input (AIN+/AIN–) with 80dB CMRR. Its encode interface accepts differential (LVDS/PECL) or single-ended (TTL/CMOS) clocks via ENC+/ENC–, with optional duty cycle stabilizer enabling full-speed operation across 40%–60% duty cycles.

Digital outputs are parallel CMOS (D0–D13, OF), configurable via separate OVDD (0.5V–3.6V) for level-shifting into FPGA or ASIC logic. Internal reference selection (via SENSE pin) supports 2.5V bandgap or external 1.25V/2.5V references, while features like dither, data randomization (RAND), and out-of-range flag (OF) enhance spectral purity in demanding RF sampling applications.

Key Specifications

Pinout & Package

48-lead 7mm × 7mm plastic QFN package (UK) with exposed GND pad (Pin 49). Pin 1 = SENSE (reference mode select), Pin 2 = VCM (1.25V bias output), Pins 3/4/12/13/14 = VDD (3.3V analog supply), Pins 5/8/11/15/48 = GND, Pins 6/7 = AIN+/AIN– (differential analog input), Pins 9/10 = ENC+/ENC– (differential encode clock), Pin 16 = SHDN (active-high shutdown).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with AD9246BCPZ-105, the LTC2207CUK-14#PBF delivers +2.8dB SNR and +10dB SFDR at RF frequencies while integrating PGA and duty cycle stabilization - reducing BOM count and layout complexity. Against LTC2206CUK-14#PBF, it provides +25Msps headroom for wider instantaneous bandwidth capture without changing footprint or thermal design.

Availability

LTC2207CUK-14#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, test instrumentation, and high-speed data acquisition requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC2207CUK-14#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 LTC2207CUK-14#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for RF sampling, communications infrastructure, and instrumentation applications demanding ultra-low jitter and wide dynamic range.

FAQ

What is the maximum input frequency supported by the LTC2207CUK-14#PBF?

The LTC2207CUK-14#PBF supports a full-power analog input bandwidth of 700MHz, enabling direct RF sampling of signals up to this frequency. Its 105Msps sample rate allows undersampling of IF/RF bands well beyond the Nyquist limit - commonly used for digitizing 250MHz LTE carriers or 70MHz WCDMA channels without analog downconversion stages. Performance remains characterized up to 250MHz input with >82dBc SFDR.

Does the LTC2207CUK-14#PBF require an external reference voltage?

No - the LTC2207CUK-14#PBF includes an internal 2.5V bandgap reference. When SENSE (Pin 1) is tied to VDD, the device configures for internal reference operation, establishing a 2.25VP-P full-scale input range. External 1.25V or 2.5V references may be applied to SENSE for alternative scaling, but are not required for standard operation of the LTC2207CUK-14#PBF.

How does the clock duty cycle stabilizer function in the LTC2207CUK-14#PBF?

The LTC2207CUK-14#PBF's optional clock duty cycle stabilizer corrects asymmetric ENC+/ENC– input waveforms internally, allowing full 105Msps performance with clock duty cycles ranging from 40% to 60%. This eliminates the need for external clock conditioning circuits and relaxes timing constraints on clock generators - particularly valuable in systems using crystal oscillators or PLLs with inherent duty cycle variation.

What is the purpose of the OF (Out-of-Range) pin on the LTC2207CUK-14#PBF?

The OF pin on the LTC2207CUK-14#PBF is an active-high indicator that asserts when the differential analog input (AIN+ – AIN–) exceeds ±FS/2 - signaling clipping or saturation. This enables real-time monitoring in digital predistortion (DPD) loops, automatic gain control (AGC) feedback paths, or fault detection systems without requiring post-processing analysis of the digitized data stream from the LTC2207CUK-14#PBF.

Can the LTC2207CUK-14#PBF operate with a 1.8V OVDD supply?

Yes - the LTC2207CUK-14#PBF supports OVDD from 0.5V to 3.6V, including 1.8V. At OVDD = 1.8V, the CMOS outputs deliver VOH ≥ 1.79V and VOL ≤ 0.1V under load, ensuring reliable interfacing with 1.8V FPGA I/O banks or ASIC logic without level shifters. This flexibility simplifies power domain partitioning in mixed-voltage systems using the LTC2207CUK-14#PBF.