Overview
The TEF6721HL/V1T,518 is a single-chip car radio tuner front-end designed by NXP USA Inc. for digital Intermediate Frequency (IF) applications. This component is tailored for use in AM, FM standard, FM In-Band On-Channel Digital Audio Broadcast (IBOC DAB), and weather band receivers. It provides combined AM and FM gain-controlled differential IF output, making it a comprehensive solution for car radio systems.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDDA(n) | Analog supply voltages | 1 | 8 | 9 | V |
| VDDA6 | Analog supply voltage 6 | 4.75 | - | - | V |
| Sensitivity (AM) | f = 990 kHz | - | 42 | - | µV |
| IP3 (3rd-order input intercept point) | Δfundesired = 50 kHz | - | 130 | - | dBµV |
| IP2 (2nd-order input intercept point) | - | - | 140 | - | dBµV |
| Operating Temperature | - | -40°C | - | 85°C | °C |
| Package | - | - | - | 64-LQFP (10x10) | - |
Key Features
- AM up-conversion tuner to an IF frequency of 10.7 MHz for Long Wave (LW)/Medium Wave (MW)/Short Wave (SW) bands.
- FM single conversion tuner to an IF frequency of 10.7 MHz with integrated image rejection for US FM, Europe FM, Japan FM, East Europe FM, and weather band reception.
- Tuning system includes Voltage-Controlled Oscillator (VCO), crystal oscillator, and Phase-Locked Loop (PLL) synthesizer on one chip.
- FM mixer for conversion of FM Radio Frequency (RF) to an IF of 10.7 MHz with inherent image rejection and switchable Local Oscillator (LO) injection.
- Inductor Capacitor (LC) tuner oscillator providing mixer frequencies for FM and AM mixers.
- Crystal oscillator providing reference frequencies for synthesizer PLL and timing for Alternative Frequency (AF) updating.
- Optional crystal oscillator frequency pulling possibility via I2C-bus.
- Fast synthesizer PLL tuning system with local control for inaudible AF updating.
- Timing function for AF updating algorithm and control signal output for interfacing with IF DSP.
- Three hardware programmable I2C-bus addresses and two software-controlled flag outputs.
- Several test modes for fast Integrated Circuit (IC) tests.
Applications
The TEF6721HL/V1T,518 is primarily used in car radio systems, supporting a wide range of radio bands including AM, FM, and weather bands. It is also suitable for systems requiring In-Band On-Channel Digital Audio Broadcast (IBOC DAB) capabilities.
Q & A
- What is the primary function of the TEF6721HL/V1T,518?
The TEF6721HL/V1T,518 is a single-chip car radio tuner front-end for digital IF applications, supporting AM, FM, and weather band reception.
- What are the supported radio bands for this component?
The component supports AM (LW/MW/SW), FM (US, Europe, Japan, East Europe), and weather bands.
- What is the Intermediate Frequency (IF) output of the TEF6721HL/V1T,518?
The IF output is 10.7 MHz for both AM and FM.
- How does the FM mixer in the TEF6721HL/V1T,518 handle image rejection?
The FM mixer provides inherent image rejection and can be switched from low injection to high injection Local Oscillator (LO) via the I2C-bus.
- What is the role of the Phase-Locked Loop (PLL) synthesizer in the TEF6721HL/V1T,518?
The PLL synthesizer is part of the tuning system, providing fast and accurate frequency tuning.
- How is the crystal oscillator used in the TEF6721HL/V1T,518?
The crystal oscillator provides reference frequencies for the synthesizer PLL and timing for Alternative Frequency (AF) updating.
- What communication interface does the TEF6721HL/V1T,518 use for programming?
The component uses the I2C-bus for programming and control.
- What are the operating temperature ranges for the TEF6721HL/V1T,518?
The operating temperature range is from -40°C to 85°C.
- What is the package type of the TEF6721HL/V1T,518?
The component is packaged in a 64-LQFP (10x10) package.
- Is the TEF6721HL/V1T,518 compliant with environmental regulations?
Yes, it is PbFree, EU RoHS compliant, and Halogen Free with a REACH SVHC indicator.
