AK5704
AK5704 is Low-Power 4-ch 32-bit ADC manufactured by Asahi Kasei Microdevices.
Description
The AK5704 is a high performance analog front-end AD converter IC ideal for voice recognition, voice control, and conferencing applications. The device has a built-in 4-ch 32-bit ADC and a low noise microphone amplifier and extracts full performance of a high S/N microphone with low power consumption by achieving dynamic range of 105d B. It is possible to support up to 16-ch microphone array by connecting multiple AK5704’s. In addition, since it incorporates ultra-low power consumption voice activity detection, power consumption during wait time is greatly reduced.
2. Features
1. Recording Function
4-Channel Low Power 32-bit ADC
2-types Digital Filter (Low-latency [5/fs] Sharp Roll-off and Voice)
Single-ended Inputs or Full-differential Inputs
MIC Amplifier Gain: +30 d B to 0 d B, 3 d B step
2-output MIC Power Supplies: 2.8 V / 2.5 V / 1.8 V / Direct Mode Selectable
ADC Characteristics:
S/N, DR: 105 d B, THD+N: 90 d B, (Gain = 0 d B)
S/N, DR: 96 d B, THD+N: 86 d B, (Gain = +18 d B)
Excellent Power Supply Noise Reduction
PSRR: 60d B
Spurious Free Dynamic Range: 100d Bc
4-Channel Digital MIC Interface
Programmable Phase Adjustment
Microphone Sensitivity Adjustment
2. Digital Voice Activity Detector
3. Programmable Digital Filter
Mixer
2nd order HPF and LPF
Digital ALC (Automatic Level Control): 4-ch Link Mode, 2-ch Mode
4. Digital Audio interface
Master/Slave mode
Sampling Frequency:
8 k, 11.025 k, 12 k, 16 k, 22.05 k, 24 k, 32 k, 44.1 k, 48 k, 88.2 k, 96 k,
176.4 k, 192 k Hz
Interface Format
- 32/24/16-bit I2S/MSB justified, 16-bit PCM Short/Long Frame
- 4-ch TDM
- 8/12/16-ch Cascade TDM
5. Built-in PLL
6. Control I/F: I2C-bus (400k Hz)
7. Operation Temperature Range: Ta = 40 to 85°C
8. Power Supply:
AVDD (ADC, MIC, PLL):
1.7 to 1.9 V or 3.0V to 3.6V
TVDD (Host & Audio I/F, LDO12): 1.65 to 3.6 V
9. Package: 28-pin...
