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参数资料
| 型号： | AD7991YRJZ-0RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 4CH I2C SOT23-8 |
| 产品变化通告： | AD7991,5,9 Offset Error Change 17/Sept/2010 |
| 设计资源： | Using AD8599 as an Ultralow Distortion Driver for the AD7991 (CN0043) |
| 标准包装： | 10,000 |
| 位数： | 12 |
| 采样率（每秒）： | 1M |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 4.68mW |
| 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-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 4 个单端，单极 |
| 配用： | EVAL-AD7991EBZ-ND - BOARD EVAL FOR AD7991 |
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AD7991/AD7995/AD7999
Rev. B | Page 25 of 28
PLACING THE AD7991/AD7995/AD7999 INTO HIGH SPEED MODE
High speed mode communication commences after the master
addresses all devices connected to the bus with the master code,
00001XXX, to indicate that a high speed mode transfer is to
begin. No device connected to the bus is allowed to acknowledge
the high speed master code; therefore, the code is followed by a
NO ACK (see Figure 26). The master must then issue a repeated
start, followed by the device address and an R/W bit. The selected
device then acknowledges its address.
All devices continue to operate in high speed mode until the
master issues a stop condition. When the stop condition is
issued, the devices return to fast mode.
To guarantee performance above fSCL = 1.7 MHz, the user must
perform clock stretching—that is, the clock must be held high—for
2 μs after the ninth clock rising edge (see Figure 27). Therefore,
the clock must be held high for 2 μs after the device starts to power
up (see the Reading from the AD7991/AD7995/AD7999 section).
0
64
61
-02
8
SDA
ACK BY
ADC
START BY
MASTER
HS MODE MASTER CODE
SERIAL BUS ADDRESS BYTE
NO ACK
19
1
9
01
0
A0
X
1
0
SCL
0
1
X
Sr
FAST MODE
HIGH SPEED MODE
Figure 26. Placing the Part into High Speed Mode
06
46
1-
03
0
SDA
11
9
D10
D9
D8
A0
1
00
0
SCL
1
D11
1
D7
D6
D5
D2
D1
D0
D4
D3
SCL (CONTINUED)
SDA (CONTINUED)
CHID1 CHID0
R/W
9
START BY
MASTER
ACK BY
ADC
NO ACK BY
MASTER
ACK BY
MASTER
STOP BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
MOST SIGNIFICANT DATA BYTE FROM ADC
FRAME 3
LEAST SIGNIFICANT DATA BYTE FROM ADC
CLOCK HIGH TIME = 2s
Figure 27. Reading Two Bytes of Data from the Conversion Result Register in High Speed Mode for AD7991
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7991YRJZ-1 | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, 12-/10-/8-Bit ADC with I2CCompatible Interface in 8-Lead SOT23 |
| AD7991YRJZ-1500RL7 | 功能描述:IC ADC 12BIT 4CH SAR I2C SOT23-8 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 |
| AD7991YRJZ-1RL | 功能描述:IC ADC 12BIT 4CH I2C SOT23-8 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 |
| AD7992 | 制造商:AD 制造商全称:Analog Devices 功能描述:2-Channel, 12-Bit ADC with I2C Compatible Interface in 10-Lead MSOP |
| AD7992_05 | 制造商:AD 制造商全称:Analog Devices 功能描述:2-Channel, 12-Bit ADC with I2C-Compatible |
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