Looked for internal pics and descriptions of the circuits in the H3 and drew a blank. However there are internals of H6 on Taobao, that one is using PCM1802 by Burr Brown (TI now). But that's an ADC, not a DAC.
The L3 also has a BB marked DAC. If the transceiver is also an Ti chip, this must be a DIT4192.
The DAC is a SSOP-20, so maybe it is a PCM1717, i don't know another price sensitiv chip from Ti in this package.