参数资料
| 型号： | AD7790BRM |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT BUFFERED LP 10MSOP |
| 标准包装： | 50 |
| 位数： | 16 |
| 采样率（每秒）： | 120 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 230µW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 输入数目和类型： | 1 个差分，双极 |
AD7790
Data Sheet
Rev. A | Page 12 of 20
Bit Location
Bit Name
Description
MR2
0
This bit must be programmed with a Logic 0 for correct operation.
MR1
BUF
Configures the ADC for buffered or unbuffered mode of operation. If cleared, the ADC operates in un-
buffered mode, lowering the power consumption of the device. If set, the ADC operates in buffered
mode, allowing the user to place source impedances on the front end without contributing gain errors
to the system.
MR0
0
This bit must be programmed with a Logic 0 for correct operation.
Table 10. Operating Modes
MD1
MD0
Mode
0
Continuous Conversion Mode (De-
fault)
0
1
Reserved
1
0
Single Conversion Mode
1
Power-Down Mode
Table 11. Analog Input Ranges
G1
G0
Range
AD7790 LSB Size with VREF = +2.5 V
(V)
0
±VREF
76.3
0
1
±VREF/2
38.14
1
0
±VREF/4
19.07
1
±VREF/8
9.54
FILTER REGISTER (RS1, RS0 = 1, 0; POWER-ON/RESET = 0x04)
The filter register is an 8-bit register from which data can be read or to which data can be written. This register is used to set the output
word rate. Table 12 outlines the bit designations for the filter register. FR0 through FR7 indicate the bit locations, FR denoting the bits are in
the filter register. FR7 denotes the first bit of the data stream. The number in brackets indicates the power-on/reset default status of that bit.
FR7
FR6
FR5
FR4
FR3
FR2
FR1
FR0
0(0)
CDIV1(0)
CDIV0(0)
0(0)
FS2(1)
FS1(0)
FS0(0)
Table 12. Filter Register Bit Designatins
Bit Location
Bit Name
Description
FR7–FR6
0
These bits must be programmed with a Logic 0 for correct operation.
FR5–FR4
CLKDIV1–
CDIV0
These bits are used to operate the AD7790 in the lower power modes. The clock is internally divided and
the power is reduced.
00
Normal Mode
01
Clock Divided by 2
10
Clock Divided by 4
11
Clock Divided by 8
FR3
0
This bit must be programmed with a Logic 0 for correct operation.
FR2–FR0
FS2–FS0
These bits set the output word rate of the ADC. The update rate influences the 50 Hz/60 Hz rejection and
noise. The noise is the same for all gain settings. See Table 13 for the allowable update rates in full power
mode. In the low power modes, the update rates will be reduced. (See Reduced Current Modes.)
Table 13. Update Rates
FS2
FS1
FS0
fADC (Hz)
f3dB (Hz)
RMS Noise (V)
Rejection
0
120
28
40
25 dB @ 60 Hz
0
1
100
24
25
25 dB @ 50 Hz
0
1
0
33.3
8
3.36
0
1
20
4.7
1.6
80 dB @ 60 Hz
1
0
16.6
4
1.5
65 dB @ 50 Hz/60 Hz (Default Setting)
1
0
1
16.7
4
1.5
80 dB @ 50 Hz
1
0
13.3
3.2
1.2
1
9.5
2.3
1.1
62 dB @ 50/60 Hz
DATA REGISTER (RS1, RS0 = 1, 1; POWER-ON/RESET = 0x0000)
The conversion result from the ADC is stored in this data register. This is a read-only register. On completion of a read operation from
this register, the RDY bit/pin is set.
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相关代理商/技术参数 |
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| AD7790BRM-REEL | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 120sps 16-bit Serial 10-Pin MSOP T/R 制造商:Analog Devices 功能描述:ADC SGL DELTA-SIGMA 0.12KSPS 16BIT SERL 10MSOP - Tape and Reel |
| AD7790BRMZ | 功能描述:IC ADC 16BIT SIGMA-DELTA 10-MSOP 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 |
| AD7790BRMZ | 制造商:Analog Devices 功能描述:IC 24-BIT ADC |
| AD7790BRMZ-REEL | 功能描述:IC ADC 16BIT SIGMA-DELTA 10-MSOP 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 |
| AD7791 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Power, Buffered 24-Bit Sigma-Delta ADC |
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