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| 型号： | ADS1232REF |
| 厂商： | Texas Instruments |
| 文件页数： | 7/39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
Z
EFF
+
1
(2)(76.8kHz)(13fF)
+ 500MW
CLK_DETECT
Internal
Oscillator
MUX
ToADC
S
S0
S1
EN
Crystal
Oscillator
CLKIN/XTAL1
XTAL2
AVDD
(1) f
MOD = 76.8kHz
Z
EFF = 500M
(1)
VREFP
VREFN
AVDD
ESD
Protection
C
BUF
CLOCK SOURCES
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
Figure 29. Equivalent Circuitry of the Clock
Source
When the clock source is a crystal, simply connect
the 4.9152MHz crystal across the CLKIN/XTAL1 and
XTAL2 pins. Table 6 shows the recommended part
numbers. Due to the low-power design of the parallel
resonant
driver
circuitry
onboard,
both
the
Figure 28. Simplified Reference Input Circuitry
CLKIN/XTAL1 and XTAL2 pins are only for use with
external crystals; they should not be used as clock
output drivers for external circuitry. No external
ESD diodes protect the reference inputs. To prevent
capacitors
are
used
with
the
crystal;
it
is
these diodes from turning on, make sure the voltages
recommended to place the crystal close to the part in
on the reference pins do not go below GND by more
order to reduce board stray capacitance for both the
than 100mV, and likewise, do not exceed AVDD by
CLKIN/XTAL1 and XTAL2 pins and to insure proper
100mV:
operation.
GND – 100mV < (REFP or REFN) < AVDD + 100mV
Table 6. Recommended Crystals
MANUFACTURER
FREQUENCY
PART NUMBER
The ADS1232/4 can use an external clock source,
ECS
4.9152MHz
ECS-49-20-1
external crystal, or internal oscillator to accommodate
ECS
4.9152MHz
ECS-49-20-4
a wide variety of applications. Figure 29 shows the
equivalent
circuitry
of
the
clock
source.
The
CLK_DETECT block determines whether the crystal
An external oscillator may be used by driving the
oscillator/external clock signal is applied to the
CLKIN/XTAL1
pin
directly.
The
Electrical
CLKIN/XTAL1 pin so that the internal oscillator is
Characteristics table shows the allowable frequency
bypassed or activated. When the CLKIN/XTAL1 pin
range.
frequency is above ~200kHz, the CLK_DETECT
output goes low and shuts down the internal
oscillator. When the XIN pin frequency is below
~200kHz, the CLK_DETECT output goes high and
activates
the
internal
oscillator.
It
is
highly
recommended to hard-wire the CLKIN/XTAL1 pin to
ground when the internal oscillator is chosen.
Copyright 2005–2008, Texas Instruments Incorporated
15
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| ADS1234 | 制造商:BB 制造商全称:BB 功能描述:Ultra Low-Noise, 24-Bit Analog-to-Digital Converter |
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| 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 |
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