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參數(shù)資料
| 型號(hào)： | ADS1259EVM-PDK |
| 廠商： | Texas Instruments |
| 文件頁(yè)數(shù)： | 8/48頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | KIT PERFORMANCE DEMO FOR ADS1259 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 24 |
| 采樣率（每秒）： | 14k |
| 數(shù)據(jù)接口： | 串行，SPI? |
| 工作溫度： | -40°C ~ 125°C |
| 已用 IC / 零件： | ADS1259 |
| 已供物品： | 2 個(gè)板，文檔，軟件 |
| 其它名稱： | 296-30635 ADS1259EVM-PDK-ND |
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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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參數(shù)描述 |
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| ADS1259EVM-PDK | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| ADS1259IPW | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Noise 14kSPS 24B ADC 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 |
| ADS1259IPW | 制造商:Texas Instruments 功能描述:A/D CONVERTER (A-D) IC |
| ADS1259IPWR | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Noise 14kSPS 24B ADC 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 |
| ADS1259QPWRQ1 | 功能描述:24 Bit Analog to Digital Converter 1 Input 1 Sigma-Delta 20-TSSOP 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 位數(shù):24 采樣率（每秒）:14k 輸入數(shù):1 輸入類型:差分，單端 數(shù)據(jù)接口:SPI 配置:ADC 無(wú)線電 - S/H:ADC:- A/D 轉(zhuǎn)換器數(shù):1 架構(gòu):三角積分 參考類型:外部 電壓 - 電源，模擬:5V 電壓 - 電源，數(shù)字:2.7 V ~ 5.25 V 特性:PGA 工作溫度:-40°C ~ 105°C 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商器件封裝:20-TSSOP 標(biāo)準(zhǔn)包裝:1 |
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