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参数资料
| 型号： | ADS1259EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 9/48页 |
| 文件大小： | 0K |
| 描述： | EVAL MODULE FOR ADS1259 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 14k |
| 数据接口： | 串行，SPI? |
| 工作温度： | -40°C ~ 125°C |
| 已用 IC / 零件： | ADS1259 |
| 已供物品： | 板 |
| 其它名称： | 296-29312 ADS1259EVM-ND |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ADS1259IPW | 制造商:Texas Instruments 功能描述:A/D CONVERTER (A-D) IC |
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