PCM1870A 90dB SNR Low-Power Stereo Audio ADC With Microphone Bias, ALC, Sound Effect, Notch Filter | TI.com

PCM1870A (ACTIVE)

90dB SNR Low-Power Stereo Audio ADC With Microphone Bias, ALC, Sound Effect, Notch Filter

 

Recommended alternative parts

  • TLV320ADC3001  -  With PLL, higher SNR, and more advanced filtering capabilities
  • TLV320ADC3101  -  With additional inputs, support for digital microphone, PLL, higher SNR and more advanced filtering capabilities

Description

The PCM1870A is a low-power stereo ADC designed for portable digital audio applications, with line-input amplifier, boost amplifier, microphone bias, programmable gain control, sound effects, and auto level control (ALC). It is available in a 24-DSBGA (2.49-mm × 3.49-mm) package to save footprint. The PCM1870A accepts right-justified, left-justified, I2S, and DSP formats, providing easy interfacing to audio DSP and encoder chips. Sampling rates up to 50 kHz are supported. The user-programmable functions are accessible through a 2- or 3-wire serial control port.

Features

  • Analog Front End:
    • Stereo Single End Input With MUX
    • Mono Differential Input
    • Stereo Programmable Gain Amplifier
    • Microphone Boost Amplifier and Bias
  • Analog Performances Dynamic Range: 90 dB
  • Power-Supply Voltage
    • 1.71 V to 3.6 V for Digital I/O Section
    • 1.71 V to 3.6 V for Digital Core Section
    • 2.4 V to 3.6 V for Analog Section
  • Low Power Dissipation:
    • 13 mW in Record, 1.8/2.4 V, 48 kHz, Stereo
    • 5.3 mW in Record, 1.8/2.4 V, 8 kHz, Mono
    • 3.3 µW in All Power Down
  • Sampling Frequency: 5 kHz to 50 kHz
  • Auto Level Control for Recording
  • Operation by Single Clock Input Without PLL
  • System Clock: Common Audio Clock
    (256 fS/384 fS), 12/24, 13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz
  • 2 (I2C) or 3 (SPI) Wire Serial Control
  • Programmable Function by Register Control:
    • Digital Soft Mute
    • Hi-Z for LRCK, BCK and DOUT
    • Power Up/Down Control for Each Module
    • 30-dB to -12-dB Gain for Analog Inputs
    • 0/12/20-dB Boost for Microphone Input
    • Parameter Settings for ALC
    • Three-Band Tone Control and 3D Sound
    • High-Pass Filter and Two-Stage Notch Filter
  • Pop Noise Reduction Circuit
  • Package:
    • 24-DSBGA (2.49 mm × 3.49 mm)
  • Operation Temperature Range: -40°C to 85°C
  • APPLICATIONS
    • Portable Audio Player, Cellular Phone
    • Video Camcorder, Movie Digital Still Camera
    • PMP/DMB, Voice Recorder

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Parametrics Compare all products in Audio ADCs

 
ADC channels
Analog inputs
ADC SNR (Typ) (dB)
Sampling Rate (Max) (kHz)
Control interface
Digital audio interface
Package size: mm2:W x L (PKG)
Approx. price (US$)
Analog outputs
TLV320ADC3001 TLV320ADC3101
2     2    
3     6    
92     92    
96     96    
I2C     I2C    
L
R
I2S
DSP
TDM
PCM    
DSP
I2S
L
PCM
R
TDM    
See datasheet (DSBGA)     24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
1.45 | 1ku     1.35 | 1ku    
0     0