PCM5242
The PCM5242 is an electronic component from Texas Instruments. View the full PCM5242 datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Integrated Circuits (ICs)
Overview
The PCM5242 is a monolithic CMOS integrated circuit that includes a stereo digital-to-analog converter and additional support circuitry in a small QFN package. The PCM5242 uses the latest generation of TI's advanced segment-DAC architecture to achieve excellent dynamic performance and improved tolerance to clock jitter.
The PCM5242 integrates a fully programmable miniDSP core, allowing developers to integrate filters, dynamic range controls, custom interpolators and other differentiating features to their products.
The PCM5242 provides 4.2VRMS ground-centered differential outputs, allowing designers to eliminate DC blocking capacitors on the output, as well as external muting circuits traditionally associated with single supply line drivers.
The integrated PLL on the device removes the requirement for a system clock (commonly known as master clock), allowing a 3-wire I 2 S connection and reducing system EMI.
Features
- 1 · Differential DirectPath™ Ground Biased Outputs
- Market-Leading Low Out-of-Band Noise
- Selectable Digital-Filter Latency and Performance
- No DC Blocking Capacitors Required
- Integrated Negative Charge Pump
- Intelligent Muting System; Soft Up or Down Ramp and Analog Mute for 120dB Mute SNR
- Integrated High-Performance Audio PLL With BCK Reference to Generate SCK Internally
- Accepts 16-, 24-, and 32-Bit Audio Data
- PCM Data Formats: I 2 S, Left-Justified, RightJustified, TDM
- SPI or I 2 C Control
- Software or Hardware Configuration
- Automatic Power-Save Mode When LRCK And BCK Are Deactivated
- 1.8V or 3.3V Failsafe LVCMOS Digital Inputs
- Single Supply Operation:
- -3.3V Analog, 1.8V or 3.3V Digital
- Integrated Power-On Reset
- Small 32-terminal QFN Package
Applications
- HiFi Smartphone
- A/V Receivers
- DVD, BD Players
- HDTV Receivers
Pin Configuration
The PCM5242 supports control from I2C, SPI and Hardware Modes (referred to as HW mode). Selection of modes is done using Mode1 and Mode2 pins. (See Table 1)
SPI Mode is selected by pulling MODE1 to DVDD.
I 2 C Mode is selected by pulling MODE1 to DGND and Mode2 to DVDD.
Hardware Control Mode is selected by pulling both MODE1 and MODE2 pins to DGND.
Electrical Characteristics
All specifications at TA = 25°C, AVDD = CPVDD = DVDD = 3.3V, fS = 48kHz, system clock = 512fS and 24-bit data unless otherwise noted.
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| Resolution | 16 | 24 | 32 | Bits | ||
| Digital Input/Output | Digital Input/Output | Digital Input/Output | Digital Input/Output | Digital Input/Output | Digital Input/Output | Digital Input/Output |
| Logic | Family: 3.3V LVCMOS compatible | |||||
| V IH | Input logic level | 0.7×DV DD | V | |||
| V IL | Input logic level | 0.3×DV DD | V | |||
| I IH | Input logic current | V IN = V DD | 10 | μA | ||
| I IL | Input logic current | V IN = 0V | -10 | μA | ||
| V OH | Output logic level | I OH = -4mA | 0.8×DV DD | V | ||
| V OL | Output logic level | I OL = 4mA | 0.22×DV DD | V | ||
| Logic Family 1.8V LVCMOS compatible | ||||||
| V IH | Input logic level | 0.7×DV DD | V | |||
| V IL | Input logic level | 0.3×DV DD | V | |||
| I IH | Input logic current | V IN = V DD | 10 | μA | ||
| I IL | Input logic current | V IN = 0V | -10 | μA | ||
| V OH | Output logic level | I OH = -2mA | 0.8×DV DD | V | ||
| V OL | Output logic level | I OL = 2mA | 0.22×DV DD | V | ||
| Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) | Dynamic Performance (PCM Mode) (1)(2) |
| THD+N at -1 dB (2) | f S = 48kHz | -94 | -87 | dB | ||
| THD+N at -1 dB (2) | f S = 96kHz | -94 | dB | |||
| THD+N at -1 dB (2) | f S = 192kHz | -94 | dB | |||
| Dynamic range (2) | EIAJ, A-weighted, f S = 48kHz | 108 | 114 | dB | ||
| Dynamic range (2) | EIAJ, A-weighted, f S = 96kHz | 114 | dB | |||
| Dynamic range (2) | EIAJ, A-weighted, f S = 192kHz | 114 | dB | |||
| Signal-to-noise ratio (2) | EIAJ, A-weighted, f S = 48kHz | 114 | dB | |||
| Signal-to-noise ratio (2) | EIAJ, A-weighted, f S = 96kHz | 114 | dB | |||
| Signal-to-noise ratio (2) | EIAJ, A-weighted, f S = 192kHz | 114 | dB | |||
| Signal to noise ratio with analog mute (2)(3) | EIAJ, A-weighted, f S = 48kHz | 113 | 123 | dB | ||
| Signal to noise ratio with analog mute (2)(3) | EIAJ, A-weighted, f S = 96kHz | 113 | 123 | dB | ||
| Signal to noise ratio with analog mute (2)(3) | EIAJ, A-weighted, f S = 192kHz | 113 | 123 | dB | ||
| Channel Separation | f S = 48kHz | 100 / 95 | 109 / 103 | dB | ||
| Channel Separation | f S = 96kHz | 100 / 95 | 109 / 103 | dB | ||
| Channel Separation | f S = 192kHz | 100 / 95 | 109 / 103 | dB |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Supply Voltage | AVDD, CPVDD, DVDD | -0.3 | 3.9 | |
| Supply Voltage | LDOO wtih DVDD at 1.8V | -0.3 | 2.25 | |
| Digital Input Voltage | DVDD at 1.8V | -0.3 | 2.25 | V |
| Digital Input Voltage | DVDD at 3.3V | -0.3 | 3.9 | V |
| Analog Input Voltage | Analog Input Voltage | -0.3 | 3.9 |
Recommended Operating Conditions
| MIN | NOM | MAX | UNIT | ||||
|---|---|---|---|---|---|---|---|
| AVDD | Analog power supply voltage range | Referenced to AGND (1) | VCOM mode | 3 | 3.3 | 3.46 | V |
| AVDD | Referenced to AGND (1) | VREF mode | 3.2 | 3.3 | 3.46 | V | |
| DVDD | Digital power supply voltage range | Referenced to DGND (1) | 1.8V DVDD | 1.65 | 1.8 | 1.95 | V |
| DVDD | Referenced to DGND (1) | 3.3V DVDD | 3.1 | 3.3 | 3.46 | V | |
| CPVDD | Charge pump supply voltage range | Referenced to CPGND (1) | Referenced to CPGND (1) | 3.1 | 3.3 | 3.46 | V |
| MCLK | Master Clock Frequency | 50 | MHz | ||||
| LOL, | Stereo line output load resistance | LOR | LOR | 2 | 10 | k Ω | |
| C Lout | Digital output load capacitance | 10 | pF | ||||
| T J | Operating Junction Temperature Range | -25 | 85 | °C |
Thermal Information
| THERMAL METRIC | THERMAL METRIC | RHB (32 PINS) | UNIT |
|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 72.2 | °C/W |
| R θ JC(top) | Junction-to-case(top) thermal resistance | 17.5 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 35.0 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 0.4 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 34.5 | °C/W |
| R θ JC(bottom) | Junction-to-case(bottom) thermal resistance | n/a | °C/W |
Typical Application
Differential outputs DAC's are regularly used where higher performance is required from them compared to single ended output DACs. They offer twice as much output voltage for the same power supply, along with noise cancelling effect of differential signaling. The PCM5242 makes an ideal front end for both analog input speaker amplifiers and headphone amplifiers with its higher voltage differential output and low noise floor.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| PCM5242RHBR | Texas Instruments | 32-VFQFN Exposed Pad |
| PCM5242RHBT | Texas Instruments | — |
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