參數(shù)資料
型號： ADS1259EVM
廠商： Texas Instruments
文件頁數(shù)： 35/48頁
文件大小： 0K
描述： EVAL MODULE 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： 板
其它名稱： 296-29312
ADS1259EVM-ND
SBAS424D
– JUNE 2009 – REVISED AUGUST 2011
SYNCOUT Pin
Connect the SYNCOUT pin to the SYNCIN pin of the PGA280, using a 4.7k
Ω series resistor (placed close to the
ADS1259). The 1M
Ω pull-down resistor is required when the ADS1259 is in power-down mode.
RESET/PWDN Pin
This pin must be high in normal operation. If it is desired to completely power down the device, or to have a
hardware reset control, then connect this pin to a controller. If these functions are not needed, tie the pin high.
(Note that the device can both be reset and SLEEP mode engaged by commands.)
START Pin
If it is desired to control conversions by pin, connect this line to the controller. Otherwise, this line can be tied
high to free-run conversions. The conversions can also be controlled by software commands. In this case, tie the
START pin low.
DRDY Pin
DRDY is an output that indicates when data are ready for readback. Note that the DOUT pin (and also the DRDY
register bit) indicates when data are ready as well, so DRDY connection to a controller is optional.
CS Pin
If the ADS1259 is a single device connected to the SPI bus, then CS can be tied low. Otherwise, for applications
where the ADS1259 shares the bus with another device, CS must be connected.
DOUT Pin
When the ADS1259 SPI is deselected (CS = 1), the DOUT pin is in 3-state mode. A pull-down resistor may be
necessary to prevent floating the controller input pin.
Miscellaneous Digital I/O
Avoid ringing on the digital inputs and outputs. Resistors in series with the trace driving end helps to reduce
ringing by controlling impedances.
SOFTWARE GUIDE
After the power supplies have fully established, allow a minimum of 216 system clocks before beginning
communication to the device. The registers can then be configured by commands via the SPI port. The following
steps detail a suggested procedure to initialize the ADS1259.
1. Send the SDATAC command
<11h>. This command cancels the RDATAC mode. RDATAC mode must be
cancelled before the register write commands.
2. Send the register write command. The following example shows the register write as a block of nine bytes,
starting at register 0 (CONFIG0).
BYTES
DATA
OPERATION
1, 2
01000000, 00001000
Write register opcode bytes, starting at address 0, 9-byte block
3
00000101
CONFIG0; register data, bias the reference, SPI timeout
4
01010000
CONFIG1; checksum enabled, sinc2 filter selection, internal
reference
5
00000011
CONFIG2; Gate Convert mode, 60SPS
6, 7, 8
00000000, 00000000,
OFC[2:0]; 3 bytes for offset, no offset correction
00000000
9, 10, 11
00000000, 00000000,
FSC[2:0]; 3 bytes for gain, no full-scale correction
01000000
40
Copyright
2009–2011, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS1259EVM 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL
ADS1259EVM-PDK 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 ADS1259 Perf Demo Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
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
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