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參數(shù)資料
| 型號： | ADS1232REF |
| 廠商： | Texas Instruments |
| 文件頁數(shù)： | 17/39頁 |
| 文件大小： | 0K |
| 描述： | EVALUATION MODULE FOR ADS1232 |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Basics |
| 視頻文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 80 |
| 數(shù)據(jù)接口： | 串行 |
| 輸入范圍： | ±2.5 V |
| 在以下條件下的電源（標(biāo)準(zhǔn)）： | 7.1mW @ 5V |
| 工作溫度： | -40°C ~ 105°C |
| 已用 IC / 零件： | ADS1232 |
| 已供物品： | 板 |
| 產(chǎn)品目錄頁面： | 889 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | ADS1232IPWRG4-ND - IC ADC 24-BIT 10/80SPS 24-TSSOP 296-25894-2-ND - IC ADC 24-BIT 10/80SPS 24-TSSOP ADS1232IPWG4-ND - IC ADC 24-BIT 10/80SPS 24-TSSOP 296-18589-5-ND - IC ADC 24-BIT 10/80SPS 24-TSSOP |
| 其它名稱： | 296-20803 |
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www.ti.com
APPLICATION EXAMPLES
Weigh-Scale System
NoiseFree Counts + 2
(18.4)1)
10mV
39mV
+ 177, 385
Thermocouple
NoiseFree Counts + 2
BIT
Eff
FS
LC
FS
AD
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
Therefore:
Figure 42 shows a typical ADS1232 hook-up as part
With +5V supply voltage, 177,385 noise-free counts
of a weigh-scale system. In this setup, the ADS1232
can be expected from the ADS1232/4 with the
is configured to channel one input with a gain of 128
onboard PGA set to 128.
at a 10SPS data rate. Note that the internal oscillator
is used by grounding the CLKIN/XTAL1 pin. The user
can also apply either a 4.9152MHz crystal across the
CLKIN/XTAL1 and XTAL2 pins, or simply apply a
See Figure 43 for the ADS1232 in a thermocouple
clock to the CLKIN/XTAL1 pin. For a typical 2mV/V
application. In this example, a type k thermocouple is
load cell, the maximum output signal is approximately
used; the temperature range is from –260
°C to
10mV for a single +5V excitation voltage. The
+900
°C when the gain is set to 64 to maximize the
ADS1232/4 can achieve 18.4 noise-free bits at
full
input
range
of
the
ADS1232.
R1 and a
10SPS when the PGA = 128 (refer to Table 1). With
REF1004-2.5V are used to set the common-mode
the extra software filtering/averaging (typically done
voltage
to
2.5V
for
ungrounded
junction
by a microprocessor), an extra bit can be expected.
thermocouples. With a gain of 128, the ADS1232
input has a typical noise of 17nVRMS for extremely
high-resolution applications.
If either a wider temperature range application is
Where:
required (up to +1350
°C, for example), or a grounded
junction
thermocouple
is
used,
pin
1
of
the
BITEFF = effective noise-free bits (18.4 + 1 bit
thermocouple can be grounded (see Figure 44).
from software filtering/averaging)
When the gain is set to 2, the ADS1232 input has a
FSLC = full-scale output of the load cell (10mV)
typical 500nV offset error and a noise level of
FSAD = full-scale input of the ADS1232/4 (39mV
270nVRMS, which is good for all kinds of low-voltage
when PGA = 128)
output sensors. Note that to calculate the actual
thermocouple temperature, the ADS1232 internal
temperature sensor can be accessed in order to
measure the cold junction temperature along with the
thermocouple reading.
24
Copyright 2005–2008, Texas Instruments Incorporated
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| ADS1234IPW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-Bit Ultra Low-Noise 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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| ADS1234IPWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-Bit Ultra Low-Noise 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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