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參數(shù)資料
| 型號： | ADS1241MEVM |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 2/30頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION MODULE FOR ADS1241M |
| 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： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 15 |
| 數(shù)據(jù)接口： | SPI? |
| 輸入范圍： | 0 ~ 2.5 V |
| 在以下條件下的電源（標準）： | 0.6mW @ 3V |
| 工作溫度： | -40°C ~ 85°C |
| 已用 IC / 零件： | ADS1241M |
| 已供物品： | 板 |
| 產(chǎn)品目錄頁面： | 889 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | ADS1241EG4-ND - IC ADC 24-BIT SER PROGBL 28-SSOP ADS1241E/1KG4-ND - IC ADC 24-BIT SER PROGBL 28-SSOP 296-25895-2-ND - IC ADC 24-BIT SER PROGBL 28-SSOP ADS1241E-ND - IC ADC 24-BIT SER PROGBL 28-SSOP |
| 其它名稱： | 296-18358 |
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ADS1240, 1241
10
SBAS173F
www.ti.com
channel. With this method, it is possible to have up to eight
single-ended input channels or four independent differential
input channels for the ADS1241, and four single-ended input
channels or two independent differential input channels for
the ADS1240. Note that AINCOM can be treated as an input
channel.
The ADS1240 and ADS1241 feature a single-cycle settling
digital filter that provides valid data on the first conversion
after a new channel selection. In order to minimize the
settling error, synchronize MUX changes to the conversion
beginning, which is indicated by the falling edge of DRDY
. In
other words, issuing a MUX change through the WREG
command immediately after DRDY goes LOW minimizes the
settling error. Increasing the time between the conversion
beginning (DRDY goes LOW) and the MUX change com-
mand (tDELAY) results in a settling error in the conversion
data, as shown in Figure 2.
BURNOUT CURRENT SOURCES
The Burnout Current Sources can be used to detect sensor
short-circuit or open-circuit conditions. Setting the Burnout
Current Sources (BOCS) bit in the SETUP register activates
two 2
A current sources called burnout current sources. One
of the current sources is connected to the converter’s nega-
tive input and the other is connected to the converter’s
positive input.
Figure 3 shows the situation for an open-circuit sensor. This
is a potential failure mode for many kinds of remotely con-
nected sensors. The current source on the positive input acts
as a pull-up, causing the positive input to go to the positive
analog supply, and the current source on the negative input
acts as a pull-down, causing the negative input to go to
ground. The ADS1240/41 therefore outputs full-scale (7FFFFF
Hex).
OVERVIEW
INPUT MULTIPLEXER
The input multiplexer provides for any combination of differ-
ential inputs to be selected on any of the input channels, as
shown in Figure 1. For example, if AIN0 is selected as the
positive differential input channel, any other channel can be
selected as the negative terminal for the differential input
A
IN3/D3
A
IN4/D4
A
IN5/D5
A
IN6/D6
A
IN0/D0
A
IN1/D1
A
IN2/D2
A
IN7/D7
A
INCOM
Burnout Current Source
AGND
AV
DD
ADS1241
Only
Input
Buffer
FIGURE 1. Input Multiplexer Configuration.
FIGURE 2. Input Multiplexer Configuration.
SETTLING ERROR vs DELAY TIME
f
CLK = 2.4576MHz
Delay Time, t
DELAY (ms)
Settling
Error
(%)
2
4
6
8
10
12
14
16
0
10.000000
1.000000
0.100000
0.010000
0.001000
0.000100
0.000010
0.000001
New Conversion Begins,
Complete Previous Conversion
New Conversion Complete
t
DELAY
MSB
LSB
DRDY
DIN
SCLK
(POL = 0)
Previous Conversion Data
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| ADS1242 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit ANALOG-TO-DIGITAL CONVERTER |
| ADS1242IPW | 制造商:Texas Instruments 功能描述:IC 24BIT ADC SMD 1242 TSSOP16 制造商:Texas Instruments 功能描述:IC, 24BIT ADC, SMD, 1242, TSSOP16 |
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| ADS1242IPWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-Bit ADC 4 Ch 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 |
| ADS1242IPWRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-Bit ADC 4 Ch 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 |
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