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参数资料
| 型号： | EVAL-AD7321CBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/37页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7321 |
| 标准包装： | 1 |
| 系列： | iCMOS® |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 500k |
| 数据接口： | 串行 |
| 输入范围： | ±10 V |
| 在以下条件下的电源（标准）： | 17mW @ 500kSPS |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7321 |
| 已供物品： | 板，CD |
| 相关产品： | AD7321BRUZ-REEL-ND - IC ADC 12BIT+SAR 2CHAN 14-TSSOP AD7321BRUZ-REEL7-ND - IC ADC 12BIT+ SAR 2CHAN 14TSSOP AD7321BRUZ-ND - IC ADC 12BIT+ SAR 2CHAN 14TSSOP |
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Data Sheet
AD7321
Rev. B | Page 29 of 36
AUTOSHUTDOWN MODE
(PM1 = 1, PM0 = 0)
Once the autoshutdown mode is selected, the AD7321 auto-
matically enters shutdown on the 15th SCLK rising edge. In
autoshutdown mode, all internal circuitry is powered down.
The AD7321 retains information in the registers during
autoshutdown. The track-and-hold is in hold mode during
autoshutdown. On the rising CS edge, the track-and-hold,
which was in hold during shutdown, returns to track as the
AD7321 begins to power up. The power-up from autoshutdown
is 500 s.
When the control register is programmed to transition to
autoshutdown mode, it does so on the 15th SCLK rising edge.
Figure 47 shows the part entering autoshutdown mode. The
AD7321 automatically begins to power up on the CS rising
edge. The tPOWER-UP is required before a valid conversion, initiated
by bringing the CS signal low, can take place. Once this valid
conversion is complete, the AD7321 powers down again on the
15th SCLK rising edge. The CS signal must remain low again to
keep the part in autoshutdown mode.
AUTOSTANDBY MODE
(PM1 = 0, PM0 =1)
In autostandby mode, portions of the AD7321 are powered
down, but the on-chip reference remains powered up. The
reference bit in the control register should be 1 to ensure that
the on-chip reference is enabled. This mode is similar to
autoshutdown but allows the AD7321 to power up much faster,
which allows faster throughput rates.
As is the case with autoshutdown mode, the AD7321 enters
standby on the 15th SCLK rising edge once the control register
is updated (see Figure 47). The part retains information in the
registers during standby. The AD7321 remains in standby until
it receives a CS rising edge. The ADC begins to power up on the
CS rising edge. On the CS rising edge, the track-and-hold, which
was in hold mode while the part was in standby, returns to track.
The power-up time from standby is 700 ns. The user should
ensure that 700 ns have elapsed before bringing CS low to
attempt a valid conversion. Once this valid conversion is
complete, the AD7321 again returns to standby on the 15th
SCLK rising edge. The CS signal must remain low to keep the
part in standby mode.
Figure 47 shows the part entering autoshutdown mode. The
sequence of events is the same when entering autostandby
mode. In Figure 47, the power management bits are configured
for autoshutdown. For autostandby mode, the power
management bits, PM1 and PM0, should be set to 0 and 1,
respectively.
CS
1
16
15
1
16
15
SCLK
SDATA
DIN
VALID DATA
DATA INTO CONTROL REGISTER
tPOWER-UP
CONTROL REGISTER IS LOADED ON THE FIRST 15 CLOCKS,
PM1 = 1, PM0 = 0
PART ENTERS SHUTDOWN MODE
ON THE 15TH RISING SCLK EDGE
AS PM1 = 1, PM0 = 0
PART BEGINS TO POWER
UP ON CS RISING EDGE
THE PART IS FULLY POWERED UP
ONCE
tPOWER-UP HAS ELAPSED
05399-
042
Figure 47. Entering Autoshutdown/Autostandby Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7322CB1 | 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 |
| EVAL-AD7322CBZ | 功能描述:BOARD EVALUATION FOR AD7322 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:iCMOS® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7323CB | 制造商:AD 制造商全称:Analog Devices 功能描述:500 kSPS, 4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC |
| EVAL-AD7323CBZ | 功能描述:BOARD EVALUATION FOR AD7323CBZ RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:iCMOS® 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| EVAL-AD7324CB | 制造商:AD 制造商全称:Analog Devices 功能描述:4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC |
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