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參數資料
| 型號： | AD7680 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | ADC |
| 英文描述： | 3mW, 100kSPS, 14-Bit ADC in 6-Lead SOT-23 |
| 中文描述： | 3MW的，100ksps的14位ADC的6引腳SOT - 23 |
| 文件頁數： | 15/20頁 |
| 文件大小： | 480K |
| 代理商： | AD7680 |
AD7940
POWER VS. THROUGHPUT RATE
By using the power-down mode on the AD7940 when not
converting, the average power consumption of the ADC
decreases at lower throughput rates. Figure 19 shows how as the
throughput rate is reduced, the part remains in its shutdown
state longer, and the average power consumption over time
drops accordingly.
Rev. 0 | Page 15 of 20
For example, if the AD7940 is operated in a continuous sam-
pling mode, with a throughput rate of 10 kSPS and an SCLK of
2.5 MHz (V
DD
= 3.6 V), and the device is placed in power-down
mode between conversions, the power consumption is calcu-
lated as follows. The maximum power dissipation during nor-
mal operation is 6.84 mW (V
DD
= 3.6 V). If the power-up time
from power-down is 1 μs, and the remaining conversion time is
6.4 μs, (using a 16 SCLK transfer), then the AD7940 can be said
to dissipate 6.84 mW for 7.4 μs during each conversion cycle.
With a throughput rate of 10 kSPS, the cycle time is 100 μs. For
the remainder of the conversion cycle, 92.6 μs, the part remains
in power-down mode. The AD7940 can be said to dissipate
1.08 μW for the remaining 92.6 μs of the conversion cycle.
Therefore, with a throughput rate of 10 kSPS, the average power
dissipated during each cycle is
(7.4/100) × (6.84 mW) + (92.6/100) × (1.08 μW) = 0.51 mW
Figure 19 shows the power dissipation versus the throughput
rate when using the power-down mode with 3.6 V supplies and
a 2.5 MHz SCLK.
0
P
0.01
0
5
10
15
20
25
THROUGHPUT (kSPS)
30
35
40
45
50
0.1
1
10
V
DD
= 3.6V
F
SCLK
= 2.5MHz
Figure 19. Power vs. Throughput Using Power-Down Mode at 3.6 V
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| AD7680ARJZ-REEL7 | 功能描述:IC ADC 16BIT LP 100KSPS SOT-23-6 RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:PulSAR® 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數:12 采樣率（每秒）:20M 數據接口:并聯 轉換器數目:2 功率耗散（最大）:155mW 電壓電源:模擬和數字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數目和類型:4 個單端，單極；2 個差分，單極 產品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7680ARM | 功能描述:IC ADC 16BIT LP 100KSPS 8-MSOP RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:PulSAR® 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
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