The TAC5242 is a high-performancelow-power stereo audio codec with 2VRMS differential input, 119dB dynamic range ADC and 2VRMS differential output, 120dB dynamic range DAC. The TAC5242 supports both differential and single-ended inputs and outputs. The ADC supports both line/microphone input signals with options for AC or DC coupling configurations and the DAC output can be configured for either line-output or headphone loads. The DAC can drive upto 62.5mW into a 16Ω headphone load. The device integrates a phase-locked loop (PLL) and supports sample rates up to 192kHz for both the ADC and DAC signal chains. The device also integrates a DC-removal digital high-pass filter (HPF) with configurable cut-off for the ADC signal chain. The TAC5242 supports time-division multiplexing (TDM), left-justified (LJ), or I2S audio formats in controller and target modes, and is pin or hardware controlled. These integrated high-performance features, pin control along with a single supply operation, make TAC5242 an excellent choice for space-constrained audio applications.
PART NUMBER | PACKAGE(1) | PACKAGE SIZE (NOM)(2) |
---|---|---|
TAC5242 | VQFN (24) | 4mm x 4mm with 0.5mm pitch |
FEATURE | TAC5242 | TAC5142 | TAC5212 | TAC5112 | TAC5211 | TAC5111 |
---|---|---|---|---|---|---|
Control interface | Pin or Hardware control | I2C or SPI | ||||
Digital audio serial interface | TDM or I2S or left-justified (LJ) | |||||
Audio ADC channel | 2 | 2 | 1 | |||
Digital microphone channel | Not available (N/A) | 4 | 2 | |||
Microphone bias | Yes (Fixed Voltage) | Yes (Programmable Voltage) | ||||
ADC dynamic range | 119dB | 103dB | 119dB | 105dB | 119dB | 105dB |
Audio DAC channel | 2 | 2 | 1 | |||
DAC dynamic range | 120dB | 110dB | 120dB | 114dB | 120dB | 114dB |
Compatibility | Pin-to-pin, package, and control configuration compatible; drop-in replacements of each other | Pin-to-pin, package, and control registers compatible; drop-in replacements of each other | Pin-to-pin, package, and control registers compatible; drop-in replacements of each other | |||
Package | VQFN, 24-pins, 4.00mm × 4.00mm with 0.5mm pitch |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
VSS | A1 | Ground | Ground pin. Short directly to board ground plane. |
DREG | 1 | Digital Supply | Digital on-chip regulator output voltage for digital supply (1.55V, nominal) |
BCLK | 2 | Digital I/O | Audio serial data interface bus bit clock |
FSYNC | 3 | Digital I/O | Audio serial data interface bus frame synchronization signal |
DOUT | 4 | Digital Output | Audio serial data interface bus output |
DIN | 5 | Digital Input | Audio serial data interface bus input |
IOVDD | 6 | Digital Supply | Digital I/O power supply (1.8V or 3.3V, nominal) |
VSS | A2 | Ground | Ground pin. Short directly to board ground plane. |
MD1 | 7 | Digital Input | Controller Mode: Frame rate and BCLK frequency selection |
Target Mode: AVDD supply, word length, and decimation/interpolation filter type selection | |||
MD2 | 8 | Digital Input | Controller Mode: Frame rate and BCLK frequency selection |
Target Mode: AVDD supply, word length, and decimation/interpolation filter type selection | |||
MD3 | 9 | Digital Input | Controller Mode: Controller clock input |
TDM Target Mode: Data slot selection | |||
I2S/LJ Target Mode: Digital HPF cut-off frequency and input cap quick charge setting for the ADC | |||
MD4 | 10 | Digital Input | ADC/DAC input/output configuration selection |
GPO | 11 | Digital Output | Interrupt output (latched) |
MD5 | 12 | Digital Input | ADC/DAC input/output configuration selection |
VSS | A3 | Ground | Ground pin. Short directly to board ground plane. |
MD0 | 13 | Analog Input | Multi-level analog input for Controller/Target and I2S/TDM/LJ mode selection |
MICBIAS | 14 | Analog | Microphone bias output |
IN1P | 15 | Analog Input | Analog input 1P pin |
IN1M | 16 | Analog Input | Analog input 1M pin |
IN2P | 17 | Analog Input | Analog input 2P pin |
IN2M | 18 | Analog Input | Analo input 2M pin |
VSS | A4 | Ground | Ground pin. Short directly to board ground plane. |
OUT1M | 19 | Analog Output | Analog output 1M pin |
OUT1P | 20 | Analog Output | Analog output 1P pin |
OUT2P | 21 | Analog Output | Analog output 2P pin |
OUT2M | 22 | Analog Output | Analog output 2M pin |
AVDD | 23 | Analog Supply | Analog power supply (1.8V or 3.3V, nominal) |
VREF | 24 | Analog | Analog reference voltage filter output |
VSS | Thermal pad | Ground |
Thermal pad shorted to internal device ground. Short directly to board ground plane. |