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参数资料
| 型号： | AD1941YSTZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/36页 |
| 文件大小： | 0K |
| 描述： | IC DSP AUDIO 16CHAN 28BIT 48LQFP |
| 标准包装： | 2,000 |
| 系列： | SigmaDSP® |
| 类型： | 音频处理器 |
| 应用： | 车载系统，家庭影院，电视 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 带卷 (TR) |
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AD1940/AD1941
Rev. B | Page 11 of
36
FEATURES
The core of the AD1940/AD1941 is a 28-bit DSP (56-bit, double
precision) optimized for audio processing. The parts’ program
RAM can be loaded with a custom program after power-up.
Signal processing parameters are stored in a 1024 location
parameter RAM, which is initialized on power-up by an
internal boot ROM. New values are written to the parameter
RAM using the control port. The values stored in the parameter
RAM control individual signal processing blocks, such as IIR
equali-zation filters, dynamics processors, audio delays, and
mixer levels. A safeload feature allows parameters to be
transparently updated without causing clicks on the output
signals.
The target/slew RAM contains 64 locations and can be used as
channel volume controls or for other parameter updates. These
RAM locations take a target value for a given parameter and
ramp the current parameter value to the new value using a
specified time constant and one of a selection of linear or
logarithmic curves.
The AD1940/AD1941 contain eight independent data capture
circuits that can be programmed to tap the signal flow of the
processor at any point in the DSP algorithm flow. Six of these
captured signals can be accessed by reading from the data
capture registers through the control port. The remaining two
data capture registers can be used to send any internal captured
signal to a stereo digital output signal on Pin SDATA_OUT7 for
driving external DACs or digital analyzers.
The AD1940/AD1941 have a sophisticated control port that
supports complete read/write capability of all memory
locations. Five control registers (Core, RAM configuration,
Serial Output 0 to 7, Serial Output 8 to 15, and serial input) are
provided to offer complete control of the chip’s configuration
and serial modes. Handshaking is included for ease of memory
uploads/downloads. The AD1940 is SPI-controlled and the
AD1941 is controlled by an I2C bus.
The AD1940/AD1941 have very flexible serial data
input/output ports that allow glueless interconnection to a
variety of ADCs, DACs, general-purpose DSPs, S/PDIF
receivers and trans-mitters, and sample rate converters. The
AD1940/AD1941 can be configured in I2S, left-justified, right-
justified, or TDM serial port-compatible modes. It can support
16, 20, and 24 bits in all modes. The AD1940/AD1941 accepts
serial audio data in MSB first and twos complement format.
A master clock phase-locked loop (PLL) allows the AD1940/
AD1941 to be clocked from a variety of different clock speeds.
The PLL can accept inputs of 64 × fS, 256 × fS, 384 × fS, or 512 ×
fS to generate the core’s internal master clock.
The AD1940/AD1941 operate from a single 2.5 V power supply.
An on-board voltage regulator can be used to operate the chip
with 3.3 V or 5 V supplies. They are fabricated on a single
monolithic integrated circuit and are housed in 48-lead
LQFP packages for operation over the –40°C to +105°C
temperature range.
04607-0-003
28
× 28
DSP CORE
DATA FORMAT:
5.23 (SINGLE PRECISION)
10.46 (DOUBLE PRECISION)
VOLTAGE REGULATOR
MEMORY CONTROLLERS
CONTROL
REGISITER
TRAP REG.
SAFELOAD
REGISTER
SERIAL
CONTROL
PORT
MCLK
PLL
DATA MEMORY
6k
× 28
TARGET/SLEW
RAM
64
× 28
SERIAL
DATA/TDM
INPUT
GROUP
PLL MODE
SELECT
MASTER
CLOCK
INPUT
CONTROL PORT
I/O GROUP
RESETB
PROGRAM
RAM
1536
× 40
BOOT
ROM
BOOT
ROM
PARAMETER
RAM
1024
× 28
COEFFICIENT
ROM
512
× 28
2
4
2
SERIAL DATA/
TDM OUTPUT
GROUP
REGULATOR
GROUP
ADDRESS SELECT
Figure 9. Block Diagram
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| AD1940YSTZRL | IC DSP AUDIO 16CH/28BIT 48-LQFP |
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| ADAU1446YSTZ-3A-RL | IC SIGMADSP 175MHZ 100LQFP |
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| AD1953YSTZ | 功能描述:IC DSP DAC AUDIO3CH/26BIT 48LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:SigmaDSP® 产品培训模块:Data Converter Fundamentals DAC Architectures 标准包装:750 系列:- 设置时间:7µs 位数:16 数据接口:并联 转换器数目:1 电压电源:双 ± 功率耗散（最大）:100mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-LCC（J 形引线） 供应商设备封装:28-PLCC（11.51x11.51） 包装:带卷 (TR) 输出数目和类型:1 电压，单极；1 电压，双极 采样率（每秒）:143k |
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