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| 型号： | ADS1232REF |
| 厂商： | Texas Instruments |
| 文件页数： | 5/39页 |
| 文件大小： | 0K |
| 描述： | EVALUATION MODULE FOR ADS1232 |
| 产品培训模块： | Data Converter Basics |
| 视频文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 80 |
| 数据接口： | 串行 |
| 输入范围： | ±2.5 V |
| 在以下条件下的电源（标准）： | 7.1mW @ 5V |
| 工作温度： | -40°C ~ 105°C |
| 已用 IC / 零件： | ADS1232 |
| 已供物品： | 板 |
| 产品目录页面： | 889 (CN2011-ZH PDF) |
| 相关产品： | 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 |
| 其它名称： | 296-20803 |
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www.ti.com
OVERVIEW
TEMPERATURE SENSOR (ADS1232 only)
ANALOG INPUTS (AINPx, AINNx)
A0
A1
AINP
AINP1
AINN1
AINP2
AINN2
AINP3
AINN3
AINP4
AINN4
10I
1I
1X
8X
AINN
ADS1232 Only
AVDD
ADS1234 Only
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
The ADS1232 and ADS1234 are highly integrated,
On-chip
diodes
provide
temperature-sensing
24-bit
ADCs
that
include
an
input
multiplexer,
capability. By setting the TEMP pin high, the selected
low-noise
PGA,
third-order
delta-sigma
(
ΔΣ)
analog inputs are disconnected and the inputs to the
modulator,
and
fourth-order
digital
filter.
With
ADC are connected to the anodes of two diodes
input-referred
RMS
noise
down
to
17nV,
the
scaled to 1x and 80x in current and size, as shown in
ADS1232/4 are ideally suited for measuring the very
Figure 26. By measuring the difference in voltage of
low
signals
produced
by
bridge
sensors
in
these diodes, temperature changes can be inferred
applications such as weigh scales, strain gauges, and
from a baseline temperature. Typically, the difference
pressure sensors.
in diode voltage
is
111.7mV
at
25
°C with a
temperature coefficient of 379
V/°C. With PGA = 1
Clocking can be supplied by an external oscillator, an
and 2, the difference voltage output from the PGA will
external crystal, or by a precision internal oscillator.
be 111.7mV and 223.4mV, respectively. With PGA =
Data can be output at 10SPS for excellent 50Hz and
64 and 128, it is impossible to use the temperature
60Hz rejection, or at 80SPS when higher speeds are
sensor function. A similar structure is used in the
needed. The ADS1232/4 are easy to configure, and
MSC1210 for temperature measurement. For more
all digital control is accomplished through dedicated
information, see TI application report SBAA100,
pins; there are no registers to program. A simple
Using the MSC121x as a High-Precision Intelligent
two-wire serial interface retrieves the data.
Temperature Sensor, available for download at
The input signal to be measured is applied to the
input pins AINPx and AINNx. The positive internal
input is generalized as AINP, and the negative
internal input generalized as AINN. The signal is
selected through the input mux, which is controlled by
pins A0 and A1 (ADS1234 only), as shown in
Table 5. For the ADS1232, the A1 pin is replaced by
the TEMP pin to activate the onboard diodes (see the
Temperature Sensor section for more details). The
ADS1232/4 accept differential input signals, but can
also measure unipolar signals. When measuring
unipolar (or single-ended signals) with respect to
ground, connect the negative input (AINNx) to ground
and connect the input signal to the positive input
(AINPx).
Note
that
when
the
ADS1232/4
are
configured this way, only half of the converter
full-scale range is used, since only positive digital
output codes are produced.
Table 5. Input Channel Selection with A0 and A1
(ADS1234 only)
MUX PINS
SELECTED ANALOG INPUTS
A1
A0
POSITIVE INPUT
NEGATIVE INPUT
0
AINP1
AINN1
0
1
AINP2
AINN2
1
0
AINP3
AINN3
1
AINP4
AINN3
Figure 26. Measurement of the Temperature
Sensor in the Input Multiplexer
Copyright 2005–2008, Texas Instruments Incorporated
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1234 | 制造商:BB 制造商全称:BB 功能描述:Ultra Low-Noise, 24-Bit Analog-to-Digital Converter |
| ADS1234IPW | 功能描述:模数转换器 - ADC 24-Bit Ultra Low-Noise RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1234IPW | 制造商:Texas Instruments 功能描述:IC ADC ULTRALOW NOISE 24BIT SMD 制造商:Texas Instruments 功能描述:IC, ADC, ULTRALOW NOISE, 24BIT, SMD 制造商:Texas Instruments 功能描述:IC, ADC, ULTRALOW NOISE, 24BIT, SMD; Resolution (Bits):24bit; Sampling Rate:80SPS; Supply Voltage Min:2.7V; Supply Voltage Max:5.3V; Supply Current:1.35mA; Digital IC Case Style:TSSOP; No. of Pins:28; Input Channel Type:Differential;;RoHS Compliant: Yes |
| ADS1234IPWG4 | 功能描述:模数转换器 - ADC 24-Bit Ultra Low-Noise RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| ADS1234IPWR | 功能描述:模数转换器 - ADC 24-Bit Ultra Low-Noise RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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