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| 型号： | AD7795BRUZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/37页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 6CH LOW-PWR 24TSSOP |
| 标准包装： | 62 |
| 位数： | 16 |
| 采样率（每秒）： | 470 |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 2.5mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 24-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 6 个差分，单极；6 个差分，双极 |
| 产品目录页面： | 779 (CN2011-ZH PDF) |
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AD7794/AD7795
Rev. D | Page 19 of 36
MODE REGISTER
RS2, RS1, RS0 = 0, 0, 1; Power-On/Reset = 0x000A
The mode register is a 16-bit read/write register that is used to
select the operating mode, the update rate, and the clock source.
Table 17 outlines the bit designations for the mode register.
MR0 through MR15 indicate the bit locations with MR
denoting that the bits are in the mode register. MR15 is the first
bit of the data stream. The number in parentheses indicates the
power-on/reset default status of that bit. Any write to the setup
register resets the modulator and filter, and sets the RDY bit.
MR15
MR14
MR13
MR12
MR11
MR10
MR9
MR8
MD2(0)
MD1(0)
MD0(0)
PSW(0)
0(0)
AMP-CM(0)
0(0)
MR7
MR6
MR5
MR4
MR3
MR2
MR1
MR0
CLK1(0)
CLK0(0)
0(0)
CHOP-DIS(0)
FS3(1)
FS2(0)
FS1(1)
FS0(0)
Table 17. Mode Register Bit Designations
Bit No.
Mnemonic
Description
MR15 to MR13
MD2 to MD0
Mode Select Bits. These bits select the operating mode of the AD7794/AD7795 (see Table 18).
MR12
PSW
Power Switch Control Bit. Set by user to close the power switch PSW to GND. The power switch can sink
up to 30 mA. Cleared by user to open the power switch. When the ADC is placed in power-down mode,
the power switch is opened.
MR11 to MR10
0
These bits must be programmed with a Logic 0 for correct operation.
MR9
AMP-CM
Instrumentation Amplifier Common-Mode Bit. This bit is used in conjunction with the CHOP-DIS bit. With
chop disabled, the user can operate with a wider range of common-mode voltages when AMP-CM is
cleared. However, the dc common-mode rejection degrades. With AMP-CM set, the span for the common-
mode voltage is reduced (see the Specifications section). However, the dc common-mode rejection is
significantly better.
MR8
0
This bit must be programmed with a Logic 0 for correct operation.
MR7 to MR6
CLK1 to CLK0
These bits are used to select the clock source for the AD7794/AD7795. Either the on-chip 64 kHz clock can
be used or an external clock can be used. The ability to use an external clock allows several AD7794/AD7795
devices to be synchronized. Also, 50 Hz/60 Hz rejection is improved when an accurate external clock
drives the AD7794/AD7795.
CLK1
CLK0
ADC Clock Source
0
Internal 64 kHz clock. Internal clock is not available at the CLK pin.
0
1
Internal 64 kHz clock. This clock is made available at the CLK pin.
1
0
External 64 kHz. The external clock can have a 45:55 duty cycle (see the
Specifications section for the external clock).
1
External clock. The external clock is divided by 2 within the AD7794/AD7795.
MR5
0
This bit must be programmed with a Logic 0 for correct operation.
MR4
CHOP-DIS
This bit is used to enable or disable chop. On power-up or following a reset, CHOP-DIS is cleared so chop is
enabled. When CHOP-DIS is set, chop is disabled. This bit is used in conjunction with the AMP-CM bit.
When chop is disabled, the AMP-CM bit should be set. This limits the common-mode voltage that can be
used by the ADC, but the dc common-mode rejection does not degrade.
MR3 to MR0
FS3 to FS0
Filter Update Rate Select Bits (see Table 19).
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| AD7795BRUZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:6-Channel, Low Noise, Low Power, 24-/16-Bit ?￡-?? ADC with On-Chip In-Amp and Reference |
| AD7795BRUZ-REEL | 功能描述:IC ADC 16BIT 6CH LOW-PWR 24TSSOP 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:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°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:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| AD7795BRUZ-REEL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:6-Channel, Low Noise, Low Power, 24-/16-Bit ?￡-?? ADC with On-Chip In-Amp and Reference |
| AD7796 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Power, 16-/24-Bit Sigma-Delta ADC for Bridge Sensors |
| AD7796BRUZ | 功能描述:IC ADC 16BIT SIG-DEL 1CH 16TSSOP 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 |
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