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参数资料
| 型号： | AD7777ARZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC ADC 10BIT 4CH HS 28SOIC |
| 标准包装： | 27 |
| 位数： | 10 |
| 采样率（每秒）： | 378k |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 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： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，单极 |
AD7776/AD7777/AD7778
–6–
REV. A
AD7778
CR5 CR4
CR3
Function
00
0
Select AIN1
00
1
Select AIN2
01
0
Select AIN3
01
1
Select AIN4
10
0
Select AIN5
10
1
Select AIN6
11
0
Select AIN7
11
1
Select AIN8
CR6: Determines whether operation is on a single channel or
simultaneous sampling on two channels. Location CR6 is a
“don’t care” for the AD7776.
CR6
Function
0
Single channel operation. Channel select
address is contained in locations CR0–CR2.
1
Two channels simultaneously sampled
and sequentially converted. Channel
select addresses contained in locations
CR0–CR2 and CR3–CR5.
CR7: Determines whether the device is in the normal operating
mode or in the half-scale test mode.
CR7
Function
0Normal Operating Mode
1Half-Scale Test Mode
In the half-scale test mode, REFIN is internally connected as an
analog input(s). In this mode, locations CR0–CR2 and CR3–CR5
are all “don’t cares” since it is REFIN which is converted. For
the AD7777 and AD7778, the contents of location CR6 still
determine whether a single or a double conversion is carried out
on the REFIN level.
CR8: Determines whether the device is in the normal operating
mode or in the power-down mode.
CR8
Function
0Normal Operating Mode
1
Power-Down Mode
In the power-down mode all linear circuitry is turned off and the
REFOUT output is weakly (5 k
) pulled to AGND. The input
impedance of the analog inputs and of the REFIN input remains
the same in either normal mode or power-down mode. See
under Circuit Description—Power-Down Mode.
CR9: Determines whether
BUSY/INT output flag goes low and
remains low during conversion(s) or else goes low and remains
low after the conversion(s) is (are) complete.
CR9
BUSY/INT Functionality
0
Output goes low and remains low during
conversion(s).
1
Output goes low and remains low after conversion(s)
is (are) complete.
CONTROL REGISTER
The control register is 10-bit wide and can only be written to.
On power-on, all locations in the control register are automati-
cally loaded with 0s. For the single channel AD7776, locations
CR0 to CR6 of the control register are “don’t cares.” For the
quad channel AD7777, locations CR2 and CR5 are “don’t
cares.” Individual bit functions are described below.
CR0–CR2: Channel Address Locations. Determines which channel
is selected and converted for single-channel operation. For simulta-
neous sampling operation, CR0–CR2 holds the address of one of
the two channels to be sampled.
AD7776
CR2 CR1
CR0
Function
X
*
XX
Select AIN1
*X = Don’t Care
AD7777
CR2 CR1
CR0
Function
X
*
00
Select AIN1
X0
1
Select AIN2
X1
0
Select AIN3
X1
1
Select AIN4
*X = Don’t Care
AD7778
CR2 CR1
CR0
Function
00
0
Select AIN1
00
1
Select AIN2
01
0
Select AIN3
01
1
Select AIN4
10
0
Select AIN5
10
1
Select AIN6
11
0
Select AIN7
11
1
Select AIN8
CR3–CR5: Channel Address Locations. Only applicable for simul-
taneous sampling with the AD7777 or AD7778 when CR3–CR5
holds the address of the second channel to be sampled.
AD7777
CR5 CR4
CR3
Function
X
*
00
Select AIN1
X0
1
Select AIN2
X1
0
Select AIN3
X1
1
Select AIN4
*X = Don’t Care
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7777ARZ-REEL | 功能描述:IC ADC 10BIT 4CHAN HS 28SOIC 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:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| AD7778 | 制造商:AD 制造商全称:Analog Devices 功能描述:LC2MOS, High Speed 1-, 4- & 8-Channel 10-Bit ADCs |
| AD7778AS | 制造商:Analog Devices 功能描述:ADC Single SAR 378ksps 10-bit Parallel 44-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:8-CH 10-BIT ADC IC - Bulk |
| AD7778ASZ | 功能描述:IC ADC 10BIT 8CHAN HS 44-MQFP 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:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
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