Diodes Incorporated ZABG6002JB20TC

Overview

ZABG6002JB20TC from Diodes Incorporated is a programmable low-power depletion-mode FET bias and mixer controller for satellite LNBs, supporting six configurable bias stages (4 LNA + 2 active mixer or 6 LNA), operating from 3.0V–8.0V supply, delivering stable 2.0V drain voltage for amplifiers and 0.25V for mixers, with drain current programmability (0–15mA for LNA, 0–7.5mA for mixer), and integrated -2.5V negative supply generation for single-supply GaAs/HEMT FET biasing in twin/quad LNB systems.

For engineers reviewing the ZABG6002JB20TC datasheet, ZABG6002JB20TC pinout, ZABG6002JB20TC application in satellite LNB biasing, or ZABG6002JB20TC equivalent for GaAs FET control, this page delivers verified functional architecture, temperature-stable current/voltage regulation, power management via RCAL logic inputs, QFN2044 package details, and real-world LNB system integration guidance - all grounded in Diodes' DS32078 Rev. 2-3 specification.

Technical Context

The ZABG6002JB20TC implements six independent closed-loop FET bias regulators, each with current-sense feedback and gate-voltage adjustment to maintain precise drain current against VCC and temperature variation. Its dual RCAL resistor programming (RCAL1, RCAL2) plus optional RCALM enables flexible grouping: LNA stages (D1/D2/D4/D5) regulated at 2.0V/≤15mA, mixer stages (D3/D6) at 0.25V/≤7.5mA, with gate drive clamped to -3.0V to -2.0V and open-circuit drain disable during logic-high RCAL assertion.

An on-chip switched-capacitor DC-DC converter generates a regulated -2.5V substrate supply (VCSUB) using external CNB/CSUB 47nF capacitors, enabling grounded-source depletion FET operation from a single positive rail. Each stage includes individual current limiting, overvoltage protection during power-up/down, and <50ppm/°C drain voltage drift over -40°C to +85°C.

Key Specifications

Pinout & Package

Package: QFN2044 (4mm × 4mm, 20-pin, exposed thermal pad). The exposed pad must be left floating or connected to CSUB per datasheet requirement (DS32078 p.4, Note 4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FET bias and mixer control applications.

Compared with ZABG6003JB20TC, the ZABG6002JB20TC offers proven field reliability and broader distributor stock, while MAX2641 lacks multi-stage control and integrated negative supply - making ZABG6002 the only solution meeting full LNB system requirements for programmable 4LNA+2mixer bias with single-supply operation.

Availability

ZABG6002JB20TC is available at Aetrix Electronics and suitable for satellite LNB manufacturing, microwave receiver front-end development, and PMR base station RF module production requiring stable component supply, consistent parametric performance, and long-term industrial availability.

Supply support for ZABG6002JB20TC 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

Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal ICs for power management, signal integrity, and connectivity applications, with design centers in Asia, Europe, and the US.

The ZABG series targets satellite receiver infrastructure, specifically engineered to simplify GaAs/HEMT FET biasing in LNBs by integrating multi-stage regulation, negative supply generation, and programmable mixer support into compact QFN/QSOP packages.

FAQ

What is the function of the RCALM pin on ZABG6002JB20TC?

The RCALM pin configures stages D3 and D6 as active mixer bias outputs when terminated to ground via a resistor (39kΩ–390kΩ); leaving it open disables mixer mode and reassigns those stages as standard 2.0V LNA bias. Its threshold is 1.5MΩ–5.0MΩ for disable, and it enables independent current tuning (0.5–7.5mA) optimized for mixer conversion gain and LO rejection.

Can ZABG6002JB20TC operate from a 3.3V supply in a twin-LNB design?

Yes - the ZABG6002JB20TC is fully specified down to 3.0V and delivers stable 2.0V LNA drain voltage and 0.25V mixer voltage at 3.3V Vcc. At 3.3V, supply current is 1.6mA typical (no load) and 62mA typical with all six stages active at 10mA, making it ideal for low-voltage twin-LNB modules with tight thermal budgets.

How does the internal -2.5V supply interact with external FET gate connections?

The internal -2.5V supply powers all gate drivers (G1–G6) and is accessible at the CSUB pin for external use. When an RCAL pin is driven >3.0V, the corresponding gate outputs are pulled to -2.5V and drains opened - ensuring safe, controlled FET turn-off without external level-shifting circuitry in grounded-source configurations.

Is the QFN2044 exposed pad required to be soldered to ground?

No - per Diodes DS32078 Rev. 2-3 (p.4, Note 4), the QFN2044 exposed pad must either be left floating or connected to the CSUB node (the -2.5V reservoir capacitor). It is not a ground connection and must never be tied to system GND, as doing so disrupts the internal negative supply regulation and risks latch-up.