AK8157A Datasheet, PDF (1/26 Pages) Asahi Kasei Microsystems – Multiclock Generator for Premium Audio Device

[AK8157A]
AK8157A
Multiclock Generator for Premium Audio Device
1. General Description
The AK8157A is a member of AKM’s low power multi clock generator family designed for a high quality
premium audio clock with high performance C/N. For example, The AK8157A is recommended to use
with a premium DAC, the AK4490. The PLL circuits of the AK8157A are developed by AKM’s
long-term-experienced clock device technology, enabling low jitter clock outputs while achieving very low
current consumption. The AK8157A generates different frequency clocks (Master Clock, Bit Clock, L/R
Clock) from external clock input, providing up to three outputs configured by register-setting. The
AK8157A is available in a 16-pin WLCSP package.
Application: Smart Cellular Phones, USB DACs, USB Headphones, Bluetooth Headphones
2. Features
 External Clock Input Frequency: 9.6MHz
 Three Frequency Selectable Clock Outputs
 Selectable Clock Output Frequencies:
- MCLK: 16.384, 22.5792, 24.576MHz
- BCLK: 2.048MHz  24.576MHz
- LRCK: 32kHz  384kHz
 Selectable Clock Output Enable / Disable Control
 Low Jitter Performance
- RMS Jitter: 45ps (10Hz  5MHz)
 Low Current Consumption: 8mA (VDD1-4 = 1.8V)
 Output Load: 80pF
 Power Supply: VDD1-4 = 1.7  2.0V
 Digital Input Level: CMOS
 Package: 16-pin WLCSP
015002776-E-00
-1-
2015/03