- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄10709 > ADS1252U (Texas Instruments)IC ADC 24-BIT SER 41.7KHZ 8-SOIC PDF資料下載
參數(shù)資料
| 型號： | ADS1252U |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 7/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 24-BIT SER 41.7KHZ 8-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Basics |
| 視頻文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 標準包裝： | 75 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 41.7k |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 40mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個差分，雙極 |
| 產(chǎn)品目錄頁面： | 889 (CN2011-ZH PDF) |
| 配用： | 296-19906-ND - EVAL MOD FOR ADS1252 |
ADS1252
15
SBAS127D
www.ti.com
N
NOISE
ER
(NUMBER
REDUCTION
IN
OF AVERAGES)
FACTOR
Vrms
BITS rms
1
31.3
V18
2
1.414
22.1
V
18.5
4
2
15.6
V19
8
2.82
11.1
V
19.5
16
4
7.82
V20
32
5.66
5.53
V
20.5
64
8
3.91
V21
128
11.3
2.77
V
21.5
256
16
1.96
V22
512
22.6
1.38
V
22.5
1024
32
978nV
23
2048
45.25
692nV
23.5
4096
64
489nV
24
TABLE IV. Averaging.
result, however, is quite different. The analog-input differen-
tial voltage is given by the following equation:
+VIN – (–VIN)
A positive digital output is produced whenever the
analog-input differential voltage is positive, whereas negative
digital output is produced whenever the differential is nega-
tive. For example, a positive full-scale output is produced
when the converter is configured with a 4.096V reference,
and the analog-input differential is 4.096V, the negative full-
scale output is produced when the differential voltage is
–4.096V. In each case, the actual input voltages must remain
within the –0.3V to +VDD range.
Actual Analog-Input Voltage—the voltage at any one ana-
log input relative to GND.
Full-Scale Range (FSR)—as with most A/D converters, the
full-scale range of the ADS1252 is defined as the input which
produces the positive full-scale digital output minus the input
which produces the negative full-scale digital output. For
example, when the converter is configured with a 4.096V
reference, the differential full-scale range is:
[4.096V (positive full-scale) – (–4.096V) (negative full-scale)] = 8.192V
Least Significant Bit (LSB) Weight—this is the theoretical
amount of voltage that the differential voltage at the analog
input has to change in order to observe a change in the
output data of one least significant bit. It is computed as
follows:
LSB Weight
Full ScaleRange
N
=
2
where N is the number of bits in the digital output.
Conversion Cycle—as used here, a conversion cycle refers
to the time period between DOUT/DRDY pulses.
Effective Resolution (ER)—of the ADS1252 in a particular
configuration can be expressed in two different units:
bits rms (referenced to output) and
Vrms (referenced to
input). Computed directly from the converter output data,
each is a statistical calculation based on a given number of
results. Noise occurs randomly; the rms value represents a
statistical measure which is one standard deviation. The ER
in bits can be computed as follows:
ER in bits rms =
20 log
2
V
Vrms noise
REF
602
.
The 2 VREF figure in each calculation represents the
full-scale range of the ADS1252, this means that both units
are absolute expressions of resolution—the performance in
different configurations can be directly compared, regardless
of the units.
Noise Reduction—for random noise, the ER can be im-
proved with averaging. The result is the reduction in noise by
the factor
√N, where N is the number of averages, as shown
in Table IV; this can be used to achieve true 24-bit perfor-
mance at a lower data rate. To achieve 24 bits of resolution,
more than 24 bits must be accumulated. A 36-bit accumula-
tor is required to achieve an ER of 24 bits. The following uses
VREF = 4.096V, with the ADS1252 outputting data at 40kHz,
a 4096 point average takes 102.4ms. The benefits of averag-
ing is degraded if the input signal drifts during that 100ms.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VI-J1P-MY-F2 | CONVERTER MOD DC/DC 13.8V 50W |
| VE-J11-MY-F3 | CONVERTER MOD DC/DC 12V 50W |
| B37984M5105K051 | CAP CER 1UF 50V X7R 10% RADIAL |
| VE-J11-MY-F2 | CONVERTER MOD DC/DC 12V 50W |
| VI-J11-MY-F4 | CONVERTER MOD DC/DC 12V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS1252U | 制造商:Texas Instruments 功能描述:IC 24BIT ADC 41.7KSPS SMD |
| ADS1252U/2K5 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ResolutionPlus 24-Bit 40kHz 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1252U/2K5G4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ResolutionPlus 24-Bit 40kHz 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1252UG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC ResolutionPlus 24-Bit 40kHz 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1253 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit, 20kHz, Low Power ANALOG-TO-DIGITAL CONVERTER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。