ucb1200 NXP Semiconductors, ucb1200 Datasheet - Page 7

• Manufacturer Part Number: ucb1200
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTIONAL DESCRIPTION
The UCB1200 consists of several analog and digital sub circuits which can be programmed via the Serial Interface Bus
(SIB). This enables the user to set the UCB1200 functionality according to actual application requirements.
AUDIO CODEC
The audio codec contains an input channel, built up with an 64 times oversampling sigma delta analog to digital converter
(ADC) with digital decimation filters and a programmable gain microphone preamplifier.
The output path consists of a digital up sample filter, a 64 time oversampling 4 bit digital to analog converter (DAC) circuit
followed by a BTL speaker driver, capable of driving a 16
attenuation and a mute function.
The audio codec also incorporates a loopback mode, in which codec output path and the input path are connected in
series.
1998 Jul 22
VSSSPKR
SPKRN
MICP
MICGND
VCCSPKR
SPKRP
Advanced modem/audio analog front-end
AUD_GAIN[4,3]
AUD_MUTE
AUD_OFF_CAN
Fig.3 Audio codec block diagram.
AUD_ATT[2..0]
AUD_LOOP
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speaker. The output path features a digital programmable
4bit DAC
AUD_GAIN[2..0]
AUD_ATT[4,3]
DIGITAL
ATTENUATOR
1bit ADC
DIGITAL
DECIMATION
FILTER
DIGITAL
NOISE
SHAPER
Product specification
UCB1200
AUD_OUT_ENA
AUD_IN_ENA
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