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參數(shù)資料
| 型號(hào)： | CPS1027-S |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁數(shù)： | 1/64頁 |
| 文件大小： | 870K |
| 代理商： | CPS1027-S |
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Data Sheet
January 2002
CSP1027 Voice Band Codec for
Cellular Handset and Modem Applications
1 Features
I
-
Σ
(delta-sigma) A/D and D/A converters with stan-
dard 16-bit serial I/O interface.
I
On-chip filters meet ITU-T G.712 voice band fre-
quency response and signal to distortion plus noise
specifications. Suitable for IS-54, GSM, and JDC
digital cellular applications.
I
Low-profile package (<1.5 mm) 48-pin thin quad flat
pack (TQFP) available or 44-pin EIAJ quad flat pack
(QFP).
I
Operates in systems with a 3.0 V to 5.0 V digital
power supply and a 5.0 V analog supply.
I
Low-power 0.9 μm CMOS technology, fully static
design, typical power of 68 mW when active and
0.05 mW in standby with a 3.3 V digital supply and a
5.0 V analog supply.
I
A low-power inactive (standby) state without stop-
ping clock or removing power supply.
I
Sampling rates up to 24 kHz.
I
On-chip programmable sampling clock generator
allows input clock to be an integer multiple of
125 times the sampling rate or an integer multiple of
the sampling rate.
I
Programmable phase adjust of both codec sampling
clock and baseband codec clock.
I
Two on-chip clock dividers for generating the output
clock for the baseband codec and the output clock
for other processors.
I
Regulated microphone power supply.
I
Microphone preamplifier, with programmable input
ranges of 0.16 Vp-p and 0.5 Vp-p.
I
Output amplifier, with programmable gain settings,
0 dB to –45 dB in –3 dB steps.
I
High-pass filters selectable via control registers.
I
Power-on reset pulse generator.
I
Standard 16-bit serial I/O interface.
I
Serial I/O multiprocessor mode compatible with Agere
System Inc.’s DSP16A and DSP1610/1616/1617/1618
digital signal processors.
2 Description
The Agere CSP1027 is a high-precision linear voice
band
-
Σ
(delta-sigma) codec designed for cellular
handset and modem applications. The device is fabri-
cated in low-power CMOS technology and designed for
low-voltage (3.0 V to 5.0 V) digital systems. The
CSP1027 is packaged in a 44-pin EIAJ quad flat pack
(QFP) or a 48-pin EIAJ thin quad flat pack (TQFP). In
the 48-pin TQFP, the CSP1027 occupies a total volume
of 0.0784 cm
3
.
The CSP1027 has a variety of significant programmable
features not found in standard voice band codecs. The
analog interface includes a microphone preamplifier with
programmable gain settings, an output amplifier with
gain programmable in 3 dB steps over a 45 dB range,
and a regulated microphone power supply. An inactive
mode allows a low-power standby state, and a mute
function provides suppression of the analog output. On-
chip antialiasing and anti-imaging filtering includes a
selectable high-pass filter. The CSP1027 meets
ITU-T G.712 voice band specifications.
The programmable features of the CSP1027 are set by
writing four on-chip control registers through the serial
I/O interface. The codec’s digital input/output uses a lin-
ear 16-bit two’s complement data format that is also
transferred through the serial I/O interface. The
CSP1027 interfaces easily to the 16-bit serial ports of
digital signal processors and other devices. The serial
interface supports the Agere fixed-point DSP family
serial multiprocessor mode. This allows up to eight com-
patible devices, including two CSP1027s, to interface to
each other on a common 4-wire bus using a time-divi-
sion-multiplexing scheme.
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