- 您现在的位置：买卖IC网 > PDF目录17096 > ADS7818EVM (Texas Instruments)EVAL MOD FOR ADS7818 PDF资料下载
参数资料
| 型号： | ADS7818EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 3/21页 |
| 文件大小： | 0K |
| 描述： | EVAL MOD FOR ADS7818 |
| 产品培训模块： | Data Converter Basics |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 500k |
| 数据接口： | 串行 |
| 输入范围： | 0 ~ 5 V |
| 在以下条件下的电源（标准）： | 11mW @ 500kSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | ADS7818 |
| 已供物品： | 板 |
| 产品目录页面： | 891 (CN2011-ZH PDF) |
| 相关产品： | ADS7818EDKR-ND - IC 12-BIT 500KHZ A/D CONV 8-MSOP ADS7818EBDKR-ND - IC 12-BIT 500KHZ A/D CONV 8-MSOP ADS7818PG4-ND - IC 12BIT 500KHZ ADC CONV 8-DIP ADS7818PBG4-ND - IC 12BIT 500KHZ ADC CONV 8-DIP ADS7818EB/2K5G4-ND - IC 12BIT 500KHZ ADC CONV 8-MSOP ADS7818EB/250G4-ND - IC 12BIT 500KHZ ADC CONV 8-MSOP ADS7818E/2K5G4-ND - IC 12BIT 500KHZ ADC CONV 8-MSOP ADS7818E/250G4-ND - IC 12BIT 500KHZ ADC CONV 8-MSOP ADS7818E/2K5-ND - IC 12-BIT 500KHZ 10MW A/D 8-MSOP ADS7818EB/2K5-ND - IC 12-BIT 500KHZ 10MW A/D 8-MSOP 更多... |
| 其它名称： | 296-19913 ADS7818EVM-ND |
11
ADS7818
Table II offers a look at the two different modes of operation
and the difference in power consumption.
the conversion will terminate immediately, before all 12-bits
have been decided. This can be a very useful feature when
a resolution of 12-bits is not needed. An example would be
when the converter is being used to monitor an input voltage
until some condition is met. At that time, the full resolution
of the converter would then be used. Short-cycling the
conversion can result in a faster conversion rate or lower
power dissipation.
There are several very important items shown in Figure 6.
The conversion currently in progress is terminated when
CONV is taken HIGH during the conversion and then taken
LOW prior to tCKCH before the start of the 13th clock cycle.
Note that if CONV goes LOW during the 13th clock cycle,
then the LSB first mode will be entered (Figure 5). Also,
when CONV goes LOW, the DATA output immediately
transitions to high impedance. If the output bit that is present
during that clock period is needed, CONV must not go LOW
until the bit has been properly latched into the receiving
logic.
DATA FORMAT
The ADS7818 output data is in straight binary format as
shown in Figure 7. This figure shows the ideal output code
for the given input voltage and does not include the effects
of offset, gain, or noise.
POWER WITH
fSAMPLE
CLK = 16 fSAMPLE
CLK = 8MHz
500kHz
11mW
250kHz
10mW
7mW
100kHz
9mW
4mW
TABLE II. Power Consumption versus CLK Input.
LSB FIRST DATA TIMING
Figure 5 shows a method to transmit the digital result in a
least-significant bit (LSB) format. This mode is entered
when CONV is pulled HIGH during the conversion (before
the end of the 12th clock) and then pulled LOW during the
13th clock (when D0, the LSB, is being transmitted). The
next 11 clocks then repeat the serial data, but in an LSB first
format. The converter enters the power-down mode during
the 13th clock and resumes normal operation when CONV
goes HIGH.
SHORT-CYCLE TIMING
The conversion currently in progress can be “short-cycled”
with the technique shown in Figure 6. This term means that
FIGURE 6. Short-cycle Timing.
D11
(MSB)
DATA
CONVERSION IN PROGRESS
IDLE
CLK
CONV
POWER MODE
FULL POWER
LOW POWER
D10
D8
D9
D7
12
3
5
46
7
D6
INTERNAL
CONVERSION
STATE
t
CVDD
t
CVL
t
CVH
HOLD
SAMPLE
SAMPLE/HOLD
MODE
NOTE: (1) The conversion currently in progress can be stopped by pulling CONV LOW during the conversion. This must occur at
least t
CKCS prior to the start of the 13th clock cycle. The DATA output pin will tri-state and the device will enter the power-down
mode when CONV is pulled LOW.
(1)
t
CVPD
相关PDF资料 |
PDF描述 |
|---|---|
| SDR-WH | SCOTCH CODE REFILL WHITE |
| RCA10DRST-S288 | CONN EDGECARD 20POS .125 EXTEND |
| VE-J3P-EZ | CONVERTER MOD DC/DC 13.8V 25W |
| GEC26DRTF | CONN EDGECARD 52POS DIP .100 SLD |
| SDR-7 | SCOTCH CODE REFILL # 7 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS7818P | 功能描述:模数转换器 - ADC 12-Bit High Speed Low Power Sampling 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 |
| ADS7818P | 制造商:BURR-BROWN 功能描述:IC 12BIT ADC 7818 DIP8 制造商:Texas Instruments 功能描述:IC 12BIT ADC 500KHZ DIP8 制造商:Texas Instruments 功能描述:IC, 12BIT ADC, 500KHZ, DIP8 制造商:Texas Instruments 功能描述:IC, 12BIT ADC, 500KHZ, DIP8; Resolution (Bits):12bit; Sampling Rate:500kSPS; Supply Voltage Type:Single; Supply Voltage Min:4.75V; Supply Voltage Max:5.25V; Supply Current:2.2mA; Digital IC Case Style:DIP; No. of Pins:8; Input ;RoHS Compliant: Yes |
| ADS7818PB | 功能描述:模数转换器 - ADC 12-Bit High Speed Low Power Sampling 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 |
| ADS7818PB | 制造商:Texas Instruments 功能描述:IC 12BIT ADC 500KHZ PDIP8 7818 |
| ADS7818PBG4 | 功能描述:模数转换器 - ADC 12-Bit High Speed Low Power Sampling 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 |
发布紧急采购，3分钟左右您将得到回复。