Analog Devices Inc. LTC2232IUK#PBF

Overview

LTC2232IUK#PBF from Analog Devices (formerly Linear Technology) is a 10-bit, 105 Msps analog-to-digital converter optimized for high-frequency signal digitization in communications systems. It delivers 61 dB SNR at 140 MHz input, 75 dB SFDR up to 200 MHz, and features 775 MHz full-power bandwidth, single 3.3 V supply operation, and ±0.5 V or ±1 V selectable input range. It is used in wireless broadband infrastructure for IF sampling and power amplifier linearization.

For engineers reviewing the LTC2232IUK#PBF datasheet, LTC2232IUK#PBF pinout, LTC2232IUK#PBF application, or LTC2232IUK#PBF equivalent, key selection criteria include jitter performance (0.15 psRMS), temperature-stable INL (±0.8 LSB over –40°C to +85°C), flexible output voltage drive (0.5 V to 3.6 V), and support for differential or single-ended clock inputs with optional duty cycle stabilization.

Technical Context

The LTC2232IUK#PBF employs a five-stage CMOS pipelined ADC architecture with internal correction logic to ensure no missing codes and low transition noise (0.12 LSB_RMS). Its sample-and-hold circuit achieves ultralow aperture jitter (0.15 ps_RMS) and 775 MHz full-power bandwidth, enabling undersampling of IF signals up to 250 MHz while maintaining >60 dB SNR.

It supports dual reference configurations: internal 1.6 V VCM bias with programmable input range via SENSE pin, or external reference with ±0.5 V/±1 V selection. Digital outputs are LVDS- or CMOS-compatible via separate OVDD (0.5–3.6 V), and timing includes pipeline latency of 5 cycles, ENC-to-DATA delay of 1.3–4 ns, and CLOCKOUT-synchronized data valid strobe.

Key Specifications

Pinout & Package

48-pin 7 mm × 7 mm QFN package with exposed thermal pad (Pin 49 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9208BCPZ-500, LTC2232IUK#PBF offers lower power, simpler parallel CMOS interface, and proven thermal stability in industrial temperature range - ideal for space-constrained, fixed-function RF receivers. Compared with LTC2233IUK#PBF, it provides 31% higher throughput for wider instantaneous bandwidth without changing PCB layout or driver circuitry.

Availability

LTC2232IUK#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, cable head-end systems, and communications test equipment requiring stable component supply, long-term industrial temperature support (–40°C to +85°C), and consistent parametric performance across production lots.

Supply support for LTC2232IUK#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 industrial, automotive, communications, and aerospace markets.

The LTC2232IUK#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications applications requiring excellent AC performance, low jitter, and robust operation across extended temperature ranges.

FAQ

What is the operating temperature range of the LTC2232IUK#PBF?

The LTC2232IUK#PBF is rated for industrial operation from –40°C to +85°C. This is confirmed by the "I" grade suffix in the part number and specified in the Absolute Maximum Ratings table, where LTC2232I and LTC2233I share identical temperature range definitions. The device maintains full performance compliance-including ±0.8 LSB INL and 61 dB SNR-across this entire range.

Does the LTC2232IUK#PBF support both offset binary and 2's complement output formats?

Yes, the LTC2232IUK#PBF supports both output formats. The MODE pin (Pin 42) selects format: tying MODE to 0 V or 2/3 VDD yields offset binary; tying to VDD or 2/3 VDD yields 2's complement. The same pin also controls clock duty cycle stabilizer activation, allowing independent configuration of data format and clock conditioning.

Can the LTC2232IUK#PBF be used with a single-ended clock input?

Yes, the LTC2232IUK#PBF accepts single-ended clock inputs on ENC+ (Pin 16), with ENC– (Pin 17) bypassed to ground via a 0.1 µF capacitor. The datasheet explicitly lists TTL, CMOS, and sine wave as valid single-ended drive types. Performance remains within specification, though differential drive is recommended for best common-mode noise rejection and jitter immunity.

What is the purpose of the SENSE pin on the LTC2232IUK#PBF?

The SENSE pin (Pin 43) configures the analog input range: connecting to VCM selects ±0.5 V, to VDD selects ±1 V, and to an external voltage between 0.5 V and 1.0 V selects ±V_SENSE. This eliminates external gain-setting resistors and enables dynamic range adaptation to varying signal chain output levels-critical for optimizing SNR in multi-stage RF receivers using the LTC2232IUK#PBF.

How does the CLOCKOUT signal function in the LTC2232IUK#PBF timing interface?

The CLOCKOUT pin (Pin 20) provides a data-valid strobe synchronized to the sampled data outputs (D0–D9). Data is latched on the falling edge of CLOCKOUT, with ENC-to-CLOCKOUT delay specified as 1.3–4 ns. This eliminates setup/hold timing uncertainty in FPGA or ASIC interfaces, enabling reliable high-speed parallel capture without complex source-synchronous clock routing.