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参数资料
| 型号： | EVAL-AD7476ACBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/29页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7476A |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行 |
| 输入范围： | 0 ~ 5.25 V |
| 在以下条件下的电源（标准）： | 17.5mW @ 1MSPS，5 V |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7476A |
| 已供物品： | 板，CD |
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AD7476A/AD7477A/AD7478A
Rev. F | Page 20 of 28
POWER VS. THROUGHPUT RATE
By using the power-down mode on the AD7476A/AD7477A/
AD7478A when not converting, the average power consump-
tion of the ADC decreases at lower throughput rates. Figure 23
shows that as the throughput rate is reduced, the device remains
in its power-down state longer and the average power consumption
over time drops accordingly.
For example, if the AD7476A/AD7477A/AD7478A operate in a
continuous sampling mode with a throughput rate of 100 kSPS
and an SCLK of 20 MHz (VDD = 5 V) and the devices are placed
in the power-down mode between conversions, the power
consumption is calculated as follows:
The power dissipation during normal operation is 17.5 mW
(VDD = 5 V). If the power-up time is one dummy cycle, that is,
1 μs, and the remaining conversion time is another cycle, that is,
1 μs, then the AD7476A/AD7477A/AD7478A dissipate 17.5 mW
for 2 μs during each conversion cycle.
If the throughput rate is 100 kSPS, the cycle time is 10 μs, then
the average power dissipated during each cycle is (2/10) ×
(17.5 mW) = 3.5 mW.
If VDD = 3 V, SCLK = 20 MHz, and the devices are again in
power-down mode between conversions, then the power
dissipation during normal operation is 5.1 mW. Thus, the
AD7576A/AD7477A/AD8478A dissipate 5.1 mW for 2 μs
during each conversion cycle. With a throughput rate of
100 kSPS, the average power dissipated during each cycle is
(2/10) × (5.1 mW) = 1.02 mW.
Figure 23 shows the power vs. the throughput rate when using
the power-down mode between conversions with both 5 V and
3 V supplies. The power-down mode is intended for use with
throughput rates of approximately 333 kSPS or less, because at
higher sampling rates, the power-down mode produces no
power savings.
THROUGHPUT (kSPS)
100
0.1
0
POWER
(mW)
10
1
0.01
50
100
150
200
250
300
350
VDD = 5V, SCLK = 20MHz
VDD = 3V, SCLK = 20MHz
02930-023
Figure 23. Power vs. Throughput
相关PDF资料 |
PDF描述 |
|---|---|
| 0210490923 | CABLE JUMPER 1.25MM .051M 23POS |
| EVAL-AD7450CBZ | BOARD EVALUATION FOR AD7450 |
| VI-B2R-EY | CONVERTER MOD DC/DC 7.5V 50W |
| VI-B1B-EY | CONVERTER MOD DC/DC 95V 50W |
| 0210490922 | CABLE JUMPER 1.25MM .051M 23POS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-AD7476CB | 制造商:Analog Devices 功能描述:Evaluation Board For AD7476 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
| EVAL-AD7476CBZ | 功能描述:BOARD EVAL FOR AD7476 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:* 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-AD7477ACB | 制造商:Analog Devices 功能描述:EVAL BD FOR AD7477A 12-/10-/8BIT ADCS IN 6-LEAD SC70 - Bulk |
| EVAL-AD7477ACB4 | 制造商:AD 制造商全称:Analog Devices 功能描述:2.35 V to 5.25 V, 1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SC70 |
| EVAL-AD7477CB | 制造商:Analog Devices 功能描述:EVALUATION BOARD I.C. - Bulk |
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