PCM1602A(1) 2nd-Order Low-Pass Filter Band Limit A-Weight" />
參數(shù)資料
型號： PCM1602APTG4
廠商： Texas Instruments
文件頁數(shù)： 33/46頁
文件大?。?/td> 0K
描述： IC DAC 24BIT 6CH 192KHZ 48-LQFP
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 250
位數(shù)： 24
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 6
電壓電源： 模擬和數(shù)字
功率耗散（最大）： 240mW
工作溫度： -25°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 帶卷 (TR)
輸出數(shù)目和類型： 6 電壓，單極
采樣率（每秒）： 192k
配用： DEM-DAI1602-ND - EVAL FIXTURE FOR PCM1602
S/PDIF
Receiver
Evaluation Board
DEM-DAI1602A
PCM1602A(1)
2nd-Order
Low-Pass
Filter
Band Limit
A-Weight
Filter(1)
Analyzer
and
Display
Digital
Generator
S/PDIF
Output
0% Full-Scale,
Dither Off (SNR)
–60 dB FS,
1-kHz Sine Wave
(Dynamic Range)
rms Mode
HPF = 22 Hz
LPF = 22 kHz
Option = A-Weighting(2)
B0063-04
f–3 dB = 54 kHz
fC = 1 kHz
Notch Filter
www.ti.com
SLES146A – AUGUST 2005 – REVISED OCTOBER 2010
DYNAMIC RANGE
Dynamic range is specified as A-weighted THD+N measured with a –60-dBFS, 1-kHz digital sine wave stimulus
at the input of the DAC. This measurement is designed to give a good indication of how the DAC performs, given
a low-level input signal.
The measurement setup for the dynamic range measurement is shown in Figure 40, and is similar to the THD+N
test setup discussed previously. The differences include the band-limit filter selection, the additional A-weighting
filter, and the –60-dBFS input level.
(1)
Infinite-zero-detect mute disabled
(2)
Results without A-weighting are approximately 3 dB worse.
Figure 40. Test Setup for Dynamic Range and SNR Measurements
IDLE-CHANNEL SIGNAL-TO-NOISE RATIO
The SNR test provides a measure of the noise of the DAC. The input to the DAC is in all-0s data, and the DAC
infinite-zero-detect mute function must be disabled (default condition at power up for the PCM1602A). This
ensures that the delta-sigma modulator output is connected to the output amplifier circuit so that idle tones (if
present) can be observed at the output. The dither function of the digital signal generator must also be disabled
to ensure an all-0s data stream at the input of the DAC.
The measurement setup for SNR is identical to that used for dynamic range, with the exception of the input
signal level (see the notes provided in Figure 40).
DIFFERENCES BETWEEN THE PCM1602APTR AND PCM1602AMPTR
While the two devices are identical, the key difference between both orderable versions is the physical
orientation of the devices in the reel. See the appended Package Materials Information sheet for more details on
the orientation of the devices in the reels. When changing the orderable part number, remember to update the
tooling program to compensate for the different orientation.
Copyright 2005–2010, Texas Instruments Incorporated
39
Product Folder Link(s): PCM1602A
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