NXP Semiconductors SA606DK,112

Overview

SA606DK,112 from NXP Semiconductors is a low-voltage monolithic FM IF system integrating mixer/oscillator, dual limiting IF amplifiers, quadrature detector, logarithmic RSSI, voltage regulator, and rail-to-rail audio/RSSI op amps in a 20-pin SSOP package. It operates down to 2.7 V, delivers 17 dB mixer conversion gain at 45 MHz, provides 90 dB RSSI dynamic range, and targets portable cellular radio and cordless phone receivers.

For engineers reviewing the SA606DK,112 datasheet, SA606DK,112 pinout, SA606DK,112 application, or SA606DK,112 equivalent, this page delivers verified specifications, validated SSOP20 pin functions, confirmed FM IF system use cases including RF level metering and FSK data reception, and two documented alternative parts with technical and application-level distinctions.

Technical Context

The SA606DK,112 implements a Gilbert-cell mixer with integrated oscillator capable of >150 MHz operation using crystal, LC, or external LO sources. Its IF signal path features cascaded 43 dB IF amplifier and 60 dB limiter stages optimized for 455 kHz ceramic filters, delivering 2 MHz small-signal bandwidth and 102 dB total gain.

Quadrature detection uses internal IF-driven and externally phase-shifted signals feeding a Gilbert cell multiplier. Both audio and RSSI outputs employ rail-to-rail op amps with accessible feedback terminals for gain adjustment and filtering-enabling second-order temperature compensation of RSSI output across −40 °C to +85 °C.

Key Specifications

Pinout & Package

SA606DK,112 is housed in a plastic shrink small outline package (SSOP20) with 20 leads, 4.4 mm body width, and 0.65 mm lead pitch per SOT266-1 specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FM IF system applications.

Compared with SA606DK,112, SA605D,112 reduces integration to save cost in non-FM applications, while MC3362P trades power efficiency for broader temperature resilience-making SA606DK,112 optimal for portable, battery-constrained FM receivers needing full IF processing in minimal space.

Availability

SA606DK,112 is available at Aetrix Electronics and suitable for portable cellular radio FM IF, cordless phone receivers, and RF level metering requiring stable component supply across industrial and consumer production volumes.

Supply support for SA606DK,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 leader specializing in secure connectivity solutions for automotive, industrial, and mobile applications.

The SA606 product line was engineered for high-performance, low-voltage FM IF signal processing in portable communication devices-emphasizing integration, power efficiency, and RF robustness in compact form factors.

FAQ

What is the minimum supply voltage required for SA606DK,112 to operate correctly?

The SA606DK,112 operates down to 2.7 V, enabling direct use with single-cell lithium-ion or alkaline batteries without intermediate regulation. Below 2.7 V, performance degrades: mixer conversion gain drops, RSSI accuracy falls outside ±1.5 dB spec, and audio output headroom shrinks. The device remains functional but does not meet datasheet limits below this threshold. SA606DK,112 is specified across −40 °C to +85 °C at 2.7 V minimum.

Can SA606DK,112 be used with a 10.7 MHz IF instead of 455 kHz?

SA606DK,112 supports IF frequencies up to 2 MHz small-signal bandwidth, but its internal IF amplifier and limiter stages are optimized for 455 kHz ceramic filters with 1.5 kΩ source/load impedances. At 10.7 MHz, gain rolls off significantly-measured data shows >20 dB reduction in usable bandwidth and degraded SINAD. SA606DK,112 is not recommended for 10.7 MHz IF; use SA602A or SA612 for VHF IF applications.

Does SA606DK,112 include an on-chip voltage regulator?

Yes, SA606DK,112 integrates a voltage regulator that supplies clean bias to internal analog blocks, reducing sensitivity to supply ripple. This regulator accepts 2.7–7.0 V input and maintains stable operation even with noisy battery sources. External 10 µF tantalum and 0.1 µF ceramic capacitors on VCC (Pin 6) are mandatory per datasheet layout guidelines to ensure regulator stability and optimal sensitivity. SA606DK,112's regulator eliminates need for external LDO in most portable designs.

How is RSSI output calibrated across temperature for SA606DK,112?

SA606DK,112 implements second-order temperature compensation within its logarithmic RSSI circuitry, achieving ±1.5 dB variation over −40 °C to +85 °C. Calibration is factory-trimmed and does not require external components. The RSSI output voltage scales linearly with input RF power (e.g., 0.3 V at −118 dBm, 2.5 V at −23 dBm), and the internal op amp (Pin 5) supports external feedback networks for fine-tuning slope or offset if needed. SA606DK,112 meets AMPS/TACS cellular RSSI accuracy requirements.

What oscillator topologies are supported by SA606DK,112?

SA606DK,112 supports crystal (up to 150 MHz via Butler oscillator), LC tank (exceeding 200 MHz), and external LO injection via OSC_IN (Pin 4). Hartley and Colpitts configurations work up to 100 MHz; Butler topology is recommended for crystal-based 100–150 MHz operation. The oscillator section is identical to the SA605, allowing reuse of proven layouts. SA606DK,112's OSC_OUT (Pin 3) and OSC_IN (Pin 4) pins provide full access to tank components for tuning and stability optimization.