Analog Devices Inc./Maxim Integrated DS1233MS-3+

Overview

DS1233MS-3+ from Analog Devices (formerly Linear Technology) is a demonstration circuit board built around the LT5579 high-linearity upconverting mixer IC, designed for RF system evaluation in WiMAX, UMTS, and PCS base stations. It supports IF input frequencies from 174MHz to 505MHz, LO range 1.1–4GHz, RF output up to 4.1GHz, and delivers up to 2.6dB conversion gain with OIP3 up to 28dBm.

For engineers reviewing the DS1233MS-3+ datasheet, DS1233MS-3+ pinout, DS1233MS-3+ application, or DS1233MS-3+ equivalent, this board enables rapid validation of LT5579 performance across defined frequency bands-specifically WiMAX (3.6GHz/2.6GHz), UMTS (2.14GHz), and PCS (1.95GHz)-with pre-tuned matching networks and calibrated test points.

Technical Context

The DS1233MS-3+ implements the LT5579 in a single-ended LO input / single-ended RF output configuration, optimized for low-side and high-side upconversion. Its layout integrates microstrip transmission lines (TL1/TL2), precision RF capacitors (e.g., AVX Accu-P series), and matched 0.1% resistors (R1/R2) to set 50mA per-side DC bias and minimize LO leakage.

Each version (A–D) uses discrete component reconfiguration-not IC-level changes-to shift operating bands: C1/C2/C9 adjust IF matching; C8/L3 tune RF output; and L1/L2 isolate DC bias paths. The board operates at 3.3V, draws 226mA, and maintains thermal stability from –40°C to +85°C.

Key Specifications

Availability

DS1233MS-3+ is available at Aetrix Electronics and suitable for WiMAX base station development, UMTS femtocell design, and PCS band radio front-end prototyping requiring stable component supply and traceable evaluation hardware.

Supply support for DS1233MS-3+ 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. (including legacy Linear Technology products) designs high-performance analog, mixed-signal, and RF ICs for precision signal processing and wireless infrastructure applications.

The DS1233MS-3+ belongs to Analog Devices' demonstration circuit portfolio for RF mixers, developed specifically to accelerate RF transceiver design and characterization of the LT5579 in licensed cellular and broadband wireless systems.

FAQ

What is the DS1233MS-3+ used for?

The DS1233MS-3+ is a demonstration circuit board for evaluating the LT5579 upconverting mixer IC. It enables engineers to validate RF performance-including conversion gain, OIP3, and LO leakage-in real-world configurations for WiMAX, UMTS, and PCS frequency bands without custom PCB design. The DS1233MS-3+ provides pre-matched interfaces, test points, and documented setup procedures for repeatable measurements.

Does the DS1233MS-3+ support both low-side and high-side LO injection?

Yes, the DS1233MS-3+ supports both low-side and high-side LO injection depending on the configured version: DS1233MS-3+-A and -D use low-side LO (e.g., 3.6GHz RF = 456MHz IF + 3.144GHz LO); DS1233MS-3+-B and -C use high-side LO (e.g., 2.14GHz RF = 240MHz IF + 2.38GHz LO). Matching components are physically installed per version to maintain optimal impedance across each mode.

What power supply requirements does the DS1233MS-3+ have?

The DS1233MS-3+ requires a stable 3.3V DC supply capable of delivering 226mA under operating conditions. Voltage must be applied directly to the VCC and GND terminals on the board; measurement confirms current draw only when LO signal is present. Exceeding 3.6V risks damage, as specified in the LT5579 absolute maximum ratings.

Can the DS1233MS-3+ be reconfigured for other IF or RF frequencies?

Yes-the DS1233MS-3+ can be reconfigured for other IF and RF frequencies by replacing discrete matching components. Table 2 (IF values) and Table 3 (RF values) in the quick start guide specify capacitor and inductor values for common frequencies (e.g., 70MHz, 140MHz, 1650MHz). Component placement and layout constraints (e.g., C9 center-to-edge distance) must be strictly followed to preserve RF integrity.

Is the DS1233MS-3+ RoHS compliant and lead-free?

Yes, the DS1233MS-3+ is RoHS compliant and assembled with lead-free solder per Analog Devices' standard manufacturing practices. All passive components-including AVX Accu-P series capacitors and wire-wound inductors-meet JEDEC J-STD-609 Category 1 moisture sensitivity and halogen-free requirements, consistent with the LT5579's qualification status.