參數(shù)資料
型號： ADS1259EVM
廠商： Texas Instruments
文件頁數(shù)： 9/48頁
文件大小： 0K
描述： EVAL MODULE FOR ADS1259
標準包裝： 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
Drift=
V
-
REFMAX
REFMIN
V
TempRange
REFNOM
x10 (ppm)
6
V
=
HYST
|V
V
|
-
PRE
POST
V
NOM
10 (ppm)
6
SBAS424D
– JUNE 2009 – REVISED AUGUST 2011
Reference Drift
External Reference
The ADS1259 internal reference is designed for
To
select
the
ADS1259
for
external
reference
minimal drift error, which is defined as the change in
operation, set the EXTREF register bit = 1 (default). If
reference voltage over temperature. The drift is
desired, the internal reference can continue to
calculated using the box method, as described by
provide a +2.5V reference output via the REFOUT
and AVSS pins. In this case, set the RBIAS register
bit = 1 to power the internal reference. If the internal
reference is activated, an external 1
μF capacitor from
REFOUT to AVSS is required.
Where:
For external reference applications, place a 1
μF
(minimum) capacitor close to the VREFP and VREFN
VREFMAX, VREFMIN, and VREFNOM are the maximum,
pins.
minimum, and nominal reference output voltages,
respectively,
over
the
specified
temperature
Because the ADS1259 measures the signal inputs
range.
(2)
(AINP and AINN) against the reference inputs
(VREFP and VREFN), reference noise and drift may
The ADS1259 internal reference features a maximum
degrade overall system performance. In ratiometric
drift coefficient of 5ppm/
°C over 0°C to +85°C
measurement applications, reference noise and drift
operating range and 12ppm/
°C over –40°C to +105°C
have a cancelling effect. In absolute measurement
operating range.
applications, reference noise and drift directly effect
the conversion results.
Thermal Hysteresis
Thermal hysteresis of the internal reference is defined
Voltage Reference Inputs (VREFP, VREFN)
as the change in voltage after operating the device at
ESD diodes protect the reference inputs. To keep
+25
°C, cycling the device through the specified
these diodes from turning on, make sure the voltages
temperature range, and returning to +25
°C. It can be
on the reference pins do not go below AVSS by more
expressed as Equation 3.
than 300mV, and likewise do not exceed AVDD by
more than 300mV.
The absolute maximum reference input range is:
AVSS
– 300mV < (VREFP or VREFN) < AVDD + 300mV(4)
Where:
Note that the valid operating range of the reference
VHYST = thermal hysteresis (in units of ppm).
inputs are shown in the Electrical Characteristics
VNOM = nominal reference voltage (+2.5V).
table.
VPRE = reference voltage measured at +25°C
pretemperature cycling.
VPOST = reference voltage measured after the
device has been cycled from +25
°C through the
temperature
range
of
0
°C and +85°C and
returned to +25
°C.
(3)
Copyright
2009–2011, Texas Instruments Incorporated
17
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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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