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| 型号： | AD7298-1BCPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/25页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT SPI/SRL 8CH 20LFCSP |
| 标准包装： | 1 |
| 位数： | 10 |
| 采样率（每秒）： | 1M |
| 数据接口： | DSP，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 23mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 20-LFCSP-WQ（4x4） |
| 包装： | 托盘 |
| 输入数目和类型： | 8 个单端，单极 |
AD7298-1
Rev. A | Page 14 of 24
ADC Transfer Function
The output coding of the AD7298-1 is straight binary for the
analog input channel conversion results. The designed code
transitions occur at successive LSB values (that is, 1 LSB, 2 LSBs,
and so forth). The LSB size is VREF/1024 for the AD7298-1. The
ideal transfer characteristic for the AD7298-1 for straight binary
coding is shown in Figure 22.
111...111
111...110
111...000
011...111
000...010
000...001
000...000
1LSB = VREF/1024
ANALOG INPUT
NOTES
1. VREF IS 2.5V.
A
D
C
COD
E
+VREF – 1LSB
1LSB
0V
09321-
007
Figure 22. Straight Binary Transfer Characteristic
VDRIVE
The AD7298-1 also provides the VDRIVE feature. VDRIVE controls
the voltage at which the serial interface operates. VDRIVE allows
the ADC to easily interface to both 1.8 V and 3 V processors.
For example, if the AD7298-1 were operated with a VDD of
3.3 V, the VDRIVE pin could be powered from a 1.8 V supply.
This enables the AD7298-1 to operate with a larger dynamic
range with a VDD of 3.3 V while still being able to interface to
1.8 V processors. Take care to ensure VDRIVE does not exceed
section).
THE INTERNAL OR EXTERNAL REFERENCE
The AD7298-1 can operate with either the internal 2.5 V on-chip
reference or an externally applied reference. The EXT_REF bit
in the control register is used to determine whether the internal
reference is used. If the EXT_REF bit is selected in the control
register, an external reference can be supplied through the VREF
pin. At power-up, the internal reference is enabled. Suitable
external reference sources for the AD7298-1 include AD780,
The internal reference circuitry consists of a 2.5 V band gap
reference and a reference buffer. When the AD7298-1 is operated
in internal reference mode, the 2.5 V internal reference is
available at the VREF pin, which should be decoupled to GND1
using a 10 F capacitor. It is recommended that the internal
reference be buffered before applying it elsewhere in the system.
The internal reference is capable of sourcing up to 2 mA of current
when the converter is static. The reference buffer requires 5.5 ms to
power up and charge the 10 F decoupling capacitor during the
power-up time.
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| AD7298-1BCPZ-RL | 功能描述:IC ADC 10BIT SPI/SRL 8CH 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7298BCPZ | 功能描述:IC ADC 12BIT SPI/SRL 1M 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| AD7298BCPZ-RL7 | 功能描述:IC ADC 10BIT SPI/SRL 8CH 20LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD73 | 制造商:Distributed By MCM 功能描述:REFRIGERATR DOOR GASKET DIRECT |
| AD7302 | 制造商:AD 制造商全称:Analog Devices 功能描述:2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC |
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