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参数资料
| 型号： | AD7321BRUZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 22/37页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT+ SAR 2CHAN 14TSSOP |
| 标准包装： | 1,000 |
| 位数： | 12 |
| 采样率（每秒）： | 500k |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 17mW |
| 电压电源： | 双 ± |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 |
| 配用： | EVAL-AD7321CBZ-ND - BOARD EVALUATION FOR AD7321 |
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AD7321
Data Sheet
Rev. B | Page 28 of 36
MODES OF OPERATION
The AD7321 has several modes of operation that are designed
to provide flexible power management options. These options
are chosen to optimize the power dissipation/throughput rate
ratio for different application requirements. The mode of
operation of the AD7321 is controlled by the power management
bits, Bit PM1 and Bit PM0, in the control register as shown in
Table 11. The default mode is normal mode, where all internal
circuitry is fully powered up.
NORMAL MODE
(PM1 = PM0 = 0)
This mode is intended for the fastest throughput rate performance
with the AD7321 being fully powered up at all times. Figure 45
shows the general operation of the AD7321 in normal mode.
The conversion is initiated on the falling edge of CS, and the
track-and-hold section enters hold mode as described in the
Serial Interface section. Data on the DIN line during the
16 SCLK transfer is loaded into one of the on-chip registers if
the write bit is set. The register is selected by programming the
register select bits (see Table 8).
1
16
2 LEADING ZEROS, CHANNEL I.D. BIT, SIGN BIT
+ CONVERSION RESULT
DATA INTO CONTROL/RANGE REGISTER
SCLK
CS
DOUT
DIN
05399-
035
Figure 45. Normal Mode
The AD7321 remains fully powered up at the end of the
conversion if both PM1 and PM0 contain 0 in the control
register.
To complete the conversion and access the conversion result,
16 serial clock cycles are required. At the end of the conversion,
CS can idle either high or low until the next conversion.
Once the data transfer is complete, another conversion can be
initiated after the quiet time, tQUIET, has elapsed.
FULL SHUTDOWN MODE
(PM1 = PM0 = 1)
In this mode, all internal circuitry on the AD7321 is powered
down. The part retains information in the registers during full
shutdown. The AD7321 remains in full shutdown mode until
the power management bits, Bit PM1 and Bit PM0, in the
control register are changed.
A write to the control register with PM1 = 1 and PM0 = 1 places
the part into full shutdown mode. The AD7321 enters full shut-
down mode on the 15th SCLK rising edge once the control register
is updated.
If a write to the control register occurs while the part is in full
shutdown mode with the power management bits, Bit PM1 and
Bit PM0, set to 0 (normal mode), the part begins to power up
on the 15th SCLK rising edge once the control register is
updated. Figure 46 shows how the AD7321 is configured to exit
full shutdown mode. To ensure the AD7321 is fully powered up,
tPOWER-UP should elapse before the next CS falling edge.
CS
1
16
1
16
SCLK
SDATA
DIN
INVALID DATA
CHANNEL IDENTIFIER BITS + CONVERSION RESULT
DATA INTO CONTROL REGISTER
tPOWER-UP
THE PART IS FULLY POWERED UP
ONCE
tPOWER-UP HAS ELAPSED
CONTROL REGISTER IS LOADED ON THE FIRST 15 CLOCKS,
PM1 = 0, PM0 = 0
TO KEEP THE PART IN NORMAL MODE, LOAD PM1 = PM0 = 0
IN CONTROL REGISTER
PART IS IN FULL
SHUTDOWN
PART BEGINS TO POWER UP ON THE 15TH
SCLK RISING EDGE AS PM1 = PM0 = 0
05399-
041
Figure 46. Exiting Full Shutdown Mode
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相关代理商/技术参数 |
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|---|---|
| AD7322 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Software Selectable True Bipolar Input, 2-Channel, 12-Bit Plus Sign ADC |
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| AD7322BRUZ | 功能描述:IC ADC 12BIT+ SAR 2CHAN 14TSSOP 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 |
| AD7322BRUZ-REEL | 功能描述:IC ADC 12BIT+SAR 2CHAN 14-TSSOP 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 |
| AD7322BRUZ-REEL7 | 功能描述:IC ADC 12BIT+ SAR 2CHAN 14TSSOP 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 |
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