參數(shù)資料
型號： CS5513
元件分類： 串行ADC
英文描述： CS5510/11/12/13 Product Data Sheet|DC Measurement|A/D Converters
中文描述： CS5510/11/12/13產(chǎn)品數(shù)據(jù)|直流測量| A / D轉(zhuǎn)換
文件頁數(shù)： 18/26頁
文件大小： 499K
代理商： CS5513
CS5510/11/12/13
18
DS337F1
2.5.3
Output Coding
As shown in Tables 1 and 2, the CS5510/11/12/13
present output conversions as 24-bit conversion
words. The first bit of the conversion word indi-
cates that a conversion is done through SDO falling
from a logic high to a logic low level. The first and
the fourth bits output will always be zero. The sec-
ond and third bits are error flags, representing an
overflow or oscillation condition. In the
CS5510/11, there are four more bits of zero, and
the remaining 16 bits are the conversion data, out-
put MSB first (Table 2). In the CS5512/13, the fi-
nal 20 bits are the conversion data, which is output
MSB first (Table 1).
Bits D22-D21 are the two flag bits. The OF (Over-
range Flag) bit is set to a logic 1 any time the input
signal is more positive than positive full scale, or
more negative than negative full scale. It is cleared
back to logic 0 whenever a conversion word occurs
which is not overranged. The OD (Oscillation De-
tect) bit is set to a logic 1 any time that an oscillatory
condition is detected in the modulator. This does
not occur under normal operating conditions, but
may occur whenever the input to the converter is ex-
cessively overranged. If the OD bit is set, the conver-
sion data bits can be completely erroneous. The OD
flag bit will be cleared to logic 0 four output words
after the modulator becomes stable again. The OD
flag can occur independent of OF with a spike on
the input. Both flag bits should be tested if any
overrange condition occurs.
Table 3 illustrates the output coding for the
CS5510/11/12/13. Conversions are output as two’s
complement values representing bipolar input sig-
nals.
2.5.4
The CS5510/11/12/13 have a modified Sinc
4
digi-
tal filter that provides CLK/612 Hz conversion
rates (CLK represents SCLK for the CS5510/12
and the internal oscillator for the CS5511/13). The
filters are optimized to yield better than 80 dB re-
jection between 47 Hz to 63 Hz (i.e. 80 dB mini-
mum rejection for both 50 Hz and 60 Hz) when the
master clock is 32.768 kHz. The filter has a re-
sponse as shown in Figure 20. Table 4 shows the
filter response for frequencies from 38 Hz to
71 Hz. Note that the response of the CS5511/13
will be similar, but the frequencies scale with the
on-chip oscillator’s frequency, which can be from
32 kHz to 96 kHz (i.e. conversion rates can vary
between 53 Hz to 159 Hz). Further note that after
initial power up, or after returning from sleep
mode, the filter requires four conversion cycles to
produce a valid conversion due to the modified
Sinc
4
filter characteristics.
Digital Filter
D23
0
D11
11
D22
OF
D10
10
D21
OD
D9
9
D20
0
D8
8
D19
MSB
D7
7
D18
18
D6
6
D17
17
D5
5
D16
16
D4
4
D15
15
D3
3
D14
14
D2
2
D13
13
D1
1
D12
12
D0
LSB
Table 1. CS5512/13 Output Conversion Data Register Description (Flags + 20 bits).
D23
0
D11
11
D22
OF
D10
10
D21
OD
D9
9
D20
0
D8
8
D19
0
D7
7
D18
0
D6
6
D17
0
D5
5
D16
0
D4
4
D15
MSB
D3
3
D14
14
D2
2
D13
13
D1
1
D12
12
D0
LSB
Table 2. CS5510/11 Output Conversion Data Register Description (Flags + 16 bits).
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CS5513-BS 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 20-Bit Delta Sigma ADC Int. OSC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
CS5513-BSR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC IC 20-Bit 8-Pin Delta Sigma ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
CS5513-BSZ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 20-Bit Delta Sigma ADC Int. OSC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
CS5513-BSZR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC IC 20-Bit 8-Pin Delta Sigma ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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