参数资料
| 型号： | ADS1259BIPWR |
| 厂商： | Texas Instruments |
| 文件页数： | 8/48页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT SPI 14KSPS 20TSSOP |
| 标准包装： | 2,000 |
| 位数： | 24 |
| 采样率（每秒）： | 14k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 |
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VREFP
AVSS
REFOUT
AVDD
VREFN
ReferenceSelect
EXTREFRegisterBit
(1=SwitchOpenforExternalReference)
ReferenceBias
RBIASRegisterBit
(1=BiasOn)
2.5V
Reference
ADCReferenceInput
(+)
( )
-
1 F
(C
m
REFOUT)
ReferenceOutput
(+)
( )
-
+
2kW
ReferenceInput
(+)
( )
-
1 F
(C
m
REFIN)
+
SBAS424D
– JUNE 2009 – REVISED AUGUST 2011
REFERENCE
the ADC reference input pins, VREFP and VREFN.
(Note that these device pins are not intended to drive
The ADS1259 includes an onboard voltage reference
external
circuits.)
An
external
1
μF
capacitor,
with a low temperature coefficient. The reference
connected from VREFP to VREFN, is recommended
voltage is 2.5V with the capability of sinking and
for noise reduction. The capacitor can be increased
sourcing 10mA via the REFOUT pin. The ADS1259
for increased noise filtering, but the settling time of
can also operate from an external reference. The
the reference may also increase. The settling time
external reference is the default selection. Refer to
should be considered upon activating the internal
Figure 38 for a reference block diagram.
reference.
Internal Reference
1
F. The capacitor dielectric absorption results in
The reference output is provided between pins
increased settling time for RC filter circuits.
REFOUT and AVSS. Because the reference output
return shares the same pin as AVSS, route the
To activate the internal reference, set the register bit
reference
return
trace
and
the
AVSS
trace
RBIAS = 1. This enables the reference bias. Once
independently as Kelvin-connected printed circuit
biased, the internal reference can then be selected as
board (PCB) traces. For stability reasons, connect a
the ADC reference by the register bit EXTREF.
1
μF capacitor between REFOUT and AVSS.
EXTREF = 0 closes the internal switches.
An internal switch connects the internal reference to
Figure 38. Reference Block Diagram
Table 2. Reference Selection for Figure 38
ADS1259 REFERENCE
RBIAS REGISTER BIT
EXTREF REGISTER BIT
Internal
1
0
External
See (1)
1
(1)
If the reference output is not required, set RBIAS = 0. If the reference output is enabled (RBIAS = 1), an external 1
F capacitor must be
used between REFOUT and AVSS.
16
Copyright
2009–2011, Texas Instruments Incorporated
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相关代理商/技术参数 |
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|---|---|
| ADS1259EVM | 功能描述:数据转换 IC 开发工具 ADS1259 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS1259EVM | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| ADS1259EVM-PDK | 功能描述:数据转换 IC 开发工具 ADS1259 Perf Demo Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS1259EVM-PDK | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| ADS1259IPW | 功能描述:模数转换器 - ADC Low-Noise 14kSPS 24B ADC 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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