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PDF CS4812 Data sheet ( Hoja de datos )
| Número de pieza | CS4812 | |
| Descripción | Fixed Function Multi-Effects Audio Processor | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS4812
Fixed Function Multi-Effects Audio Processor
Features
l DSP for embedded reverb/effects
applications
– 24-bit Audio Processing Engine
– No External RAM required
– Two 24-bit ∆Σ ADCs with 100 dB Dyn. Range
– Two 24-bit ∆Σ DACs with 100 dB Dyn. Range
l Mono Guitar or Mixer Effects firmware
included
l Real time parameter control via messaging
protocol
l Serial Control Port for microcontroller
interface
l Single +5V supply operation
l 100-pin Metric Quad Flat Package (MQFP)
ORDERING INFO
CS4812-KM -10 to +70°C 100-pin MQFP
CDB4812 Electric Guitar Effects w/
Parameter Controls.
Description
The CS4812 is a complete audio effects processing
system on a chip. This device includes a proprietary 24-
bit audio processing engine with considerable on-chip
RAM, two ADCs and two DACs. A full-featured serial
control port allows interfacing to an external host
microcontroller. Other features such as single +5V
operation simplify system design.
The CS4812, combined with Crystal effects firmware, is
the ideal solution for a variety of effects processing
applications where user parameter control is desired.
The Crystal effects firmware provides a messaging
protocol for the serial control port that allows an external
microcontroller to have real-time parameter control over
the audio effects. The complete processor and effects
solution may be evaluated with the CDB4812
demonstration board. The CDB4812 demonstrates a
host of mono electric guitar effects including a digital
spring reverb, delay, chorus, flange and tremolo with
parameter adjustment capability. Please refer to AN195
for more information on application firmware for the
CS4812.
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.D(512) 445 7222 FAX: (512) 445 7581
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This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright Cirrus Logic, Inc. 2001
(All Rights Reserved)
JUL ‘01
DS291PP3
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1 page  
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CS4812
DAC CHARACTERISTICS (TA = 25°C; VA, VD = + 5V; -1 dB Full Scale Output Sine wave,
997 Hz; Fs = 48 kHz; XTI = 12.288 MHz (PLL disabled). Measurement Bandwidth is 20 Hz to 20 kHz.)
Parameters
Symbol Min Typ Max Units
Analog Output Characteristics - Minimum Attenuation, 10 kΩ, 100 pF load; unless otherwise specified.
DAC Resolution
16 - 24 Bits
Dynamic Range
(DAC not muted, A weighted)
95 100
-
dB
Total Harmonic Distortion + Noise
THD+N
-
-90 -85
dB
Interchannel Isolation
- 90 -
dB
Interchannel Gain Mismatch
- 0.1 -
dB
Offset Voltage (differential)
(Note 7)
- -20 ± 5 -
mV
Offset Voltage (V+/V- relative to CMOUT)
(Note 7)
- -45/-25 -
mV
Full Scale Output Voltage
Gain Drift
(Differential)
(Note 2)
1.9 2.0 2.1 Vrms
- 100 - ppm/°C
Out of Band Energy
(Fs/2 to 2Fs, Note 2)
- -60 - dBFS
Analog Output Load
Resistance
Capacitance
10 -
- kΩ
- - 100 pF
Group Delay (Fs = Input Sample Rate)
Analog Loopback Performance
tgd - 16/Fs - s
Signal-to-Noise Ratio (CCIR-2K weighted, -20 dB input)
CCIR-2K
-
74
-
dB
Power Supply
Power Supply Current
Operating
Power Down
(Note 8)
- 200 -
-1-
mA
mA
Power Supply Rejection
(1 kHz, 10 mVrms, Note 2)
- 50 -
dB
Notes: 7. Measured with DAC calibration disabled.
8. Measured with XTI clock disabled.
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CS4812
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| PDF Descargar | [ Datasheet CS4812.PDF ] | |
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