NXP Semiconductors SA612AD/01,112

Overview

SA612AD/01,112 from NXP Semiconductors is a low-power VHF monolithic double-balanced mixer with integrated oscillator and voltage regulator, designed for RF signal conversion in communication systems. It delivers 17 dB typical conversion gain at 45 MHz, supports RF input up to 500 MHz and LO frequencies up to 200 MHz, and achieves 5.0 dB typical noise figure-making it suitable for cordless telephone and cellular radio front-ends.

For engineers reviewing the SA612AD/01,112 datasheet, SA612AD/01,112 pinout, SA612AD/01,112 application, or SA612AD/01,112 equivalent, key selection considerations include its Gilbert-cell architecture, internal biasing of RF inputs (1.5 kΩ || 3 pF), balanced differential outputs, oscillator configurability (crystal/tank/external LO), and SO8 package compatibility with reflow soldering.

Technical Context

The SA612AD/01,112 implements a Gilbert-cell multiplier topology with a temperature-compensated bias network, enabling high linearity and stable low-noise performance across −40 °C to +85 °C. Its RF inputs (IN_A/IN_B) are internally biased and symmetrical, while mixer outputs (OUT_A/OUT_B) each connect to VCC via a 1.5 kΩ resistor for flexible single-ended or balanced termination.

The on-chip oscillator supports crystal (overtone mode), tuned tank, or external LO injection at OSC_B (pin 6); when used as a buffer, external LO must be 200–300 mV_PP. Third-order intercept is typically −13 dBm, indicating strong large-signal handling within its 500 MHz RF bandwidth.

Key Specifications

Pinout & Package

SA612AD/01,112 is housed in an 8-lead SO (SO8) plastic small outline package (SOT96-1), 3.9 mm body width, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar double-balanced mixer and oscillator applications.

Compared with SA612AD/01,112, SA612DR offers identical performance in a different packing format ideal for high-volume SMT lines, while NE602P provides functional equivalence in through-hole form but lacks SO8 thermal and space advantages for modern compact designs.

Availability

SA612AD/01,112 is available at Aetrix Electronics and suitable for cordless telephone front-ends, portable VHF transceivers, and RF data link receivers requiring stable component supply, consistent SO8 packaging, and guaranteed NXP manufacturing traceability.

Supply support for SA612AD/01,112 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and communication markets.

The SA612AD/01,112 belongs to NXP's legacy RF mixer portfolio, engineered specifically for cost-sensitive, low-power VHF communication systems where integration of mixer, oscillator, and regulator reduces bill-of-materials and board space.

FAQ

What is the maximum RF input frequency supported by the SA612AD/01,112?

The SA612AD/01,112 supports RF input frequencies up to 500 MHz, as confirmed in Table 6 of the NXP datasheet. This specification applies directly to the SA612AD/01,112 device and enables its use in VHF transceivers and broadband LAN receivers without external prescaling.

Can the SA612AD/01,112 operate with an external local oscillator signal?

Yes, the SA612AD/01,112 can accept an external LO injected at pin 6 (OSC_B) through a DC-blocking capacitor. The datasheet specifies a required input level of 200–300 mV_PP, making the SA612AD/01,112 compatible with synthesizer outputs in agile RF systems.

What is the typical noise figure of the SA612AD/01,112 and at what frequency is it measured?

The SA612AD/01,112 has a typical noise figure of 5.0 dB at 45 MHz, as stated in Table 6 (Dynamic Characteristics) of the official NXP datasheet. This value is critical for sensitivity-limited applications such as cordless telephone receivers where weak-signal detection is essential.

Does the SA612AD/01,112 require external biasing on its RF input pins?

No, the SA612AD/01,112 features internally biased RF inputs (IN_A and IN_B). The datasheet explicitly warns against external DC biasing, as the pins are designed for AC-coupled operation only, with an equivalent input impedance of 1.5 kΩ || 3 pF through 50 MHz.

What package type is used for the SA612AD/01,112 and what are its key mechanical dimensions?

The SA612AD/01,112 uses the SO8 package (SOT96-1) with 3.9 mm body width, as documented in Table 1 of the NXP datasheet. Its lead pitch is 1.27 mm, and it complies with JEDEC MS-012 standards for surface-mount reflow soldering.