参数资料
| 型号： | ADS7883SBDBVR |
| 厂商： | Texas Instruments |
| 文件页数： | 19/19页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12-BIT 3MSPS SOT23-6 |
| 标准包装： | 3,000 |
| 位数： | 12 |
| 采样率（每秒）： | 3M |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 20mW |
| 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： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个单端，单极 |
NORMAL OPERATION
1
2
3
11
12
14
15
CS
SCLK
SDO
0
D11
D10
D2
D1
D0
13
0
16
td1
td2
th1
tconv
tq
td3
b
tsu1
a
td4
tacq
a
t
w1
POWER-DOWN MODE
1
2
3
4
5
9
10
16
CS
SCLK
SDO
td5
td6
www.ti.com ....................................................................................................................................................................................................... SLAS594 – JULY 2008
The cycle begins with the falling edge of CS. This point is indicated as a in Figure 21. With the falling edge of
CS, the input signal is sampled and the conversion process is initiated. The device outputs data while the
conversion is in progress. The data word contains two leading zeros, followed by 12-bit data in MSB first format
and padded by two lagging zeros.
The falling edge of CS clocks out the first zero, and a second zero is clocked out on the first falling edge of the
clock. Data is in MSB first format with the MSB being clocked out on the 2nd falling edge. Data is padded with
two lagging zeros as shown in Figure 21. The conversion ends on the first rising edge of SCLK after the 13th
falling edge. At this point the device enters the acquisition phase. This point is indicated by b in Figure 21.
Figure 21 shows the device data is read in a sixteen clock frame. However, CS can be asserted (pulled high) any
time after point b. SDO goes to 3-state with the CS high level. The next conversion should not be started (by
pulling CS low) until the end of the quiet sampling time (tq) after SDO goes to 3-state or until the minimum
acquisition time (tacq) has elapsed. To continue normal operation, it is necessary that CS is not pulled high until
point b. Without this, the device does not enter the acquisition phase and no valid data is available in the next
cycle. (Also refer to the Power-Down Mode section for more details.) CS going high any time during the
conversion aborts the ongoing conversion and SDO goes to 3-state.
The high level of the digital input to the device is not limited to device VDD. This means the digital input can go as
high as 5.5 V when the device supply is 2.7 V. This feature is useful when digital signals are received from
another circuit with different supply levels. Also, this relaxes the restriction on power-up sequencing. However,
the digital output levels (VOH and VOL) are governed by VDD as listed in the Electrical Specifications table.
Figure 21. Interface Timing Diagram
The device enters power-down mode if CS goes high anytime after the 2nd SCLK falling edge to before the 10th
SCLK falling edge. An ongoing conversion stops and SDO goes to 3-state under this power-down condition as
shown in Figure 22.
Figure 22. Entering Power-Down Mode
Copyright 2008, Texas Instruments Incorporated
9
Product Folder Link(s): ADS7883
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS7883SBDBVT | 功能描述:模数转换器 - ADC 2.7V-5.5V 12B 3MSPS Serial 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 |
| ADS7883SDBVR | 功能描述:模数转换器 - ADC 2.7V-5.5V 12B 3MSPS Serial 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 |
| ADS7883SDBVT | 功能描述:模数转换器 - ADC 2.7V-5.5V 12B 3MSPS Serial 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 |
| ADS7884 | 制造商:TI 制造商全称:Texas Instruments 功能描述:12-BIT, 3-MSPS, MICROPOWER, MINIATURE SAR ANALOG-TO-DIGITAL CONVERTER |
| ADS7884EVM | 功能描述:数据转换 IC 开发工具 ADS7884 Eval Mod 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 |
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