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參數(shù)資料
| 型號： | AD7851KR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 14-Bit 333 kSPS Serial A/D Converter |
| 中文描述： | 1-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24 |
| 封裝： | MS-013AD, SOIC-24 |
| 文件頁數(shù)： | 5/36頁 |
| 文件大小： | 435K |
| 代理商： | AD7851KR |
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–5–
REV. A
AD7851
T Y PICAL T IMING DIAGRAMS
Figures 2 and 3 show typical read and write timing diagrams.
Figure 2 shows the reading and writing after conversion in In-
terface Modes 2 and 3. T o attain the maximum sample rate of
285 kHz in Interface Modes 2 and 3, reading and writing must
be performed during conversion. Figure 3 shows the timing dia-
gram for Interface Modes 4 and 5 with sample rate of 285 kHz.
At least 330 ns acquisition time must be allowed (the time from
the falling edge of BUSY to the next rising edge of
CONVST
)
before the next conversion begins to ensure that the part is
settled to the 14-bit level. If the user does not want to provide
the
CONVST
signal, the conversion can be initiated in software
by writing to the control register.
1.6mA
+2.1V
200μA
C
L
50pF
TO
OUTPUT
PIN
I
OL
I
OH
Figure 1. Load Circuit for Digital Output Timing
Specifications
DB15
DB0
DB11
POLARITY PIN LOGIC HIGH
SYNC
(I/P)
SCLK (I/P)
t
3
BUSY (O/P)
CONVST
(I/P)
t
2
t
5
t
11
t
6
t
9
t
10
1
5
6
16
t
12
DOUT (O/P)
DB0
DB11
t
8
DIN (I/P)
3-STATE
3-STATE
DB15
t
CONVERT
t
CONVERT
= 3.25μs MAX, t
= 100ns MIN,
t
5
7
= 30ns MIN
t
1
t
6
t
7
Figure 2. AD7851 Timing Diagram (Typical Read and Write Operation for Interface Modes 2, 3)
POLARITY PIN LOGIC HIGH
SYNC (
O/P)
SCLK (O/P)
t
4
BUSY (O/P)
CONVST
(I/P)
t
2
t
5
t
11
t
12
t
9
t
10
1
5
6
16
DOUT (O/P)
DB0
DB11
t
8
DIN (I/P)
DB15
DB0
3-STATE
DB11
3-STATE
DB15
t
CONVERT
t
CONVERT
= 3.25μs MAX, t
= 100ns MIN,
t
5
7
= 30ns MIN
t
1
t
6
t
7
Figure 3. AD7851 Timing Diagram (Typical Read and Write Operation for Interface Modes 4, 5)
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相關(guān)代理商/技術(shù)參數(shù) |
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| AD7851KR-REEL | 制造商:Analog Devices 功能描述: |
| AD7851KRZ | 功能描述:IC ADC 14BIT SRL 333KSPS 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7851KRZ3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
| AD7851KRZ-REEL | 功能描述:IC ADC 14BIT SRL 333KSPS 24-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7851KRZ-REEL3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
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