Overview
The SA614AD/01,112, produced by NXP USA Inc., is an improved monolithic low-power FM IF (Intermediate Frequency) system. This integrated circuit is designed to enhance the performance of FM receivers by incorporating two limiting intermediate frequency amplifiers, a quadrature detector, and muting functionality. It is optimized for low power consumption, making it suitable for a variety of applications where energy efficiency is crucial.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Limiting -3 dB | -92 | - | - | dBm |
| AM Rejection (80% AM, 1 kHz) | 25 | 33 | - | dB |
| Recovered Audio Level (15 nF de-emphasis) | 60 | 175 | 260 | mVRMS |
| Total Harmonic Distortion (THD) | -30 | -42 | - | dB |
| Signal-to-Noise Ratio (S/N) (no modulation) | - | 68 | - | dB |
| RSSI Output Range | 0 | 160-800 | - | mV (RF level = -118 dBm) |
| RSSI Output Range | 1.7 | 2.50-3.3 | - | V (RF level = -68 dBm) |
| RSSI Output Range | 3.6 | 4.80-5.8 | - | V (RF level = -18 dBm) |
| Input Impedance (IF) | 1.4 | 1.6 | - | kΩ |
| Output Impedance (IF) | 0.85 | 1.0 | - | kΩ |
| Limiter Input Impedance | 1.4 | 1.6 | - | kΩ |
| Output Resistance (unmuted audio) | - | 58 | - | kΩ |
| Output Resistance (muted audio) | - | 58 | - | kΩ |
Key Features
- Low power consumption, making it suitable for battery-powered devices.
- Two limiting intermediate frequency amplifiers for improved signal processing.
- Quadrature detector for accurate demodulation of FM signals.
- Muting functionality to reduce noise and interference.
- Received Signal Strength Indicator (RSSI) with monotonic logarithmic output over a range of 90 dB.
- High AM rejection ratio to minimize amplitude modulation interference.
- Compact 16-SOIC package for space-efficient designs.
Applications
The SA614AD/01,112 is widely used in various FM receiver applications, including:
- Portable FM radios and walkie-talkies.
- Automotive FM receivers.
- Wireless communication devices.
- Consumer electronics requiring FM reception capabilities.
- Industrial and commercial communication systems.
Q & A
- What is the primary function of the SA614AD/01,112?
The SA614AD/01,112 is a low-power FM IF system designed for FM receiver applications, incorporating limiting intermediate frequency amplifiers, a quadrature detector, and muting functionality. - What is the typical input impedance of the IF stage?
The typical input impedance of the IF stage is 1.6 kΩ. - How does the RSSI output work?
The RSSI output provides a monotonic logarithmic indication of the signal strength over a range of 90 dB, derived from the summed stage currents in the limiting amplifiers. - What is the AM rejection ratio of the SA614AD/01,112?
The AM rejection ratio is typically 33 dB for 80% AM at 1 kHz. - What is the package type of the SA614AD/01,112?
The SA614AD/01,112 comes in a 16-SOIC package. - What are the typical operating voltages for the SA614AD/01,112?
The typical operating voltages are ±6 V. - How does the muting functionality work?
The muting functionality reduces noise and interference by silencing the audio output when the signal strength is below a certain threshold. - What is the total harmonic distortion (THD) of the SA614AD/01,112?
The total harmonic distortion is typically -42 dB. - What is the signal-to-noise ratio (S/N) of the SA614AD/01,112?
The signal-to-noise ratio is typically 68 dB without modulation. - What are some common applications of the SA614AD/01,112?
Common applications include portable FM radios, automotive FM receivers, wireless communication devices, and consumer electronics requiring FM reception capabilities.
