Smart Home Audio(325)


The NADC24D003FA is an integrated 24-bit delta-sigma (ΔΣ) analog-to-digital converter (ADC). Designed to deliver excellent precision and speed, the NADC24D003FA ADC achieves outstanding low-noise performance with up to 22-bit Effective-Number-of-Bits (ENOB). This makes it an ideal choice for demanding applications where high-precision analog signal conversion is essential for optimal performance.

The key components of NADC24D003FA include a low-noise programmable gain amplifier (PGA), an internal voltage reference of 1.2V or 2.4V, a delta-sigma modulator, a digital filter and a 49.152 MHz oscillator. The characteristics of these key components ensure its high precision signal conversion. Furthermore, in order to achieve higher performance and integration, the NADC24D003FA integrates an input multiplexer with 6 single-ended channels, a temperature sensor and an SPI interface. These integrated features effectively facilitate a compact PCB design and reduce component costs. The NADC24D003FA’s operating voltage ranges from 2.7 V to 3.6 V while its operating temperature ranges from -40 °C to 105 °C. Its package is TSSOP20 with dimension of 4.4 mm x 6.5 mm.

Target applications:

  • Utility meters
  • Pressure sensors
  • Gas sensors
  • Oximeters
  • Glucose meters
  • Temperature controllers
  • Programmable logic controllers (PLC)


Operating Characteristics
  - Voltage range: 2.7 V to 3.6 V
  - Temperature range: -40 °C to 105 °C
  - EFT ±4.4 kV
  - ESD HBM ±4 kV
  - Internal 49.152 MHz HIRC oscillator with a variation of ±2 % across all temperature ranges
  - 6 single-ended multiplexed input channels
  - One internal differential channel for internal temperature sensor
  - Low-Noise PGA with programmable gains of 1, 2, 4, 8, 16, 32, 64 and 128
  - Configurable output data rates: 15.625 SPS to 96 KSPS
  - Internal voltage reference: 1.2 V or 2.4 V, 100 ppm/°C drift
  - Internal temperature sensor with accuracy up to ±2 ˚C accuracy
  - One set of SPI interface for external communication
  - TSSOP20 (4.4 mm x 6.5 mm)
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