Analog Devices Inc. DC1233A-B

Overview

DC1233A-B from Analog Devices (formerly Linear Technology) is a demonstration circuit designed to evaluate the LT5579 high-linearity upconverting mixer IC in WiMAX applications at 2.6GHz RF output with high-side LO injection and 456MHz IF input. It delivers 1.3dB conversion gain, 26.2dBm OIP3, and -36dBm LO-to-RF leakage under 3.3V/226mA operation.

For engineers reviewing the DC1233A-B datasheet, DC1233A-B pinout, DC1233A-B application, or DC1233A-B equivalent, this board enables rapid validation of RF upconversion performance, LO drive sensitivity, and spectral purity in 2.6GHz base station transmitters, small-cell radios, and broadband wireless infrastructure designs.

Technical Context

The DC1233A-B implements the LT5579 mixer in a fully assembled, impedance-matched evaluation platform optimized for high-side LO injection at 2.6GHz RF output. Its matching network uses microstrip transmission lines (TL1/TL2), precision capacitors (C1–C9), and 40Ω termination resistors (R1/R2) to maintain differential IF input impedance and minimize LO leakage.

It operates with a fixed 3.3V supply, supports IF input from 330–505MHz (configured for 456MHz), and achieves 74dB IF-to-LO isolation and 12dB single-sideband noise figure - all measured at 25°C with -1dBm LO and -5dBm two-tone IF input.

Key Specifications

Availability

DC1233A-B is available at Aetrix Electronics and suitable for WiMAX base stations, small-cell radio units, and broadband wireless access equipment requiring stable component supply, pre-validated RF performance, and fast time-to-test in production test environments.

Supply support for DC1233A-B 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 RF integrated circuits, serving communications, industrial, automotive, and instrumentation markets.

The DC1233A-B belongs to ADI's demonstration circuit portfolio for RF signal chain components, specifically engineered to accelerate evaluation of high-linearity upconverting mixers like the LT5579 in wireless infrastructure applications.

FAQ

What is the primary function of the DC1233A-B?

The DC1233A-B is a ready-to-use evaluation board that demonstrates the LT5579 upconverting mixer IC in a high-side LO configuration for 2.6GHz WiMAX RF output. It provides calibrated RF performance data, validated matching networks, and standardized test interfaces - enabling engineers to verify conversion gain, OIP3, and LO leakage without custom PCB development. The DC1233A-B simplifies prototyping for wireless infrastructure transmitters.

Does the DC1233A-B require external power regulation?

No - the DC1233A-B accepts a single 3.3V DC supply and draws 226mA under operating conditions, with on-board decoupling and filtering optimized for LT5579 stability. No external LDO or regulator is needed; however, supply voltage must be confirmed directly at the VCC/GND test points to account for trace resistance, as specified in the Quick Start Guide. The DC1233A-B does not include voltage conversion circuitry.

Can the DC1233A-B be reconfigured for other IF frequencies?

Yes - the DC1233A-B can be modified for alternate IF frequencies using component value changes documented in Table 2 of the Quick Start Guide, including C1/C2, C9, R1/R2, and TL1/TL2 layout adjustments. Matching network recalibration is required, and the LT5579 datasheet provides impedance models and design equations. The DC1233A-B schematic (Figure 3) shows all modifiable nodes for IF tuning.

What RF output interface does the DC1233A-B use?

The DC1233A-B uses a 50Ω SMA-female RF output connector matched via an internal LT5579 RF transformer and external C8/L3 network (0.45pF capacitor and 3.9nH inductor per Table 3), optimized for 2140–2780MHz operation. Return loss exceeds 10dB across its rated RF band, and the output stage is DC-coupled with no blocking capacitor, preserving low-frequency modulation integrity for the DC1233A-B.

Is the DC1233A-B compatible with the DC1233A-A or DC1233A-C boards?

The DC1233A-B shares the same PCB footprint and core LT5579 layout as DC1233A-A and DC1233A-C, but differs in IF/RF matching components and LO injection mode (high-side vs. low-side). While mechanical mounting is identical, RF performance parameters - including conversion gain (+1.3dB), OIP3 (+26.2dBm), and noise figure (12dB) - are specific to the DC1233A-B configuration and not interchangeable without recharacterization.