參數(shù)資料
型號(hào): ADS7815U/1K
廠商: Texas Instruments
文件頁(yè)數(shù): 12/16頁(yè)
文件大?。?/td> 0K
描述: IC 16BIT 250KHZ A/D CONV 28SOIC
產(chǎn)品培訓(xùn)模塊: Data Converter Basics
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 16
采樣率(每秒): 250k
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 250mW
電壓電源: 雙 ±
工作溫度: -25°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 28-SOIC
包裝: 帶卷 (TR)
輸入數(shù)目和類(lèi)型: 1 個(gè)單端,雙極
ADS7815
5
SBAS065B
www.ti.com
BASIC OPERATION
Figure 1 shows the recommended circuit for operation of the
ADS7815. A falling edge on the convert pulse signal places
the sample and hold into the hold mode and initiates a
conversion. When the conversion is complete, the pins D15
through D0 become active and the result of the conversion
is placed on these outputs. In the circuit shown in Figure 1,
the rising edge of BUSY latches the result into the 74HC574s.
After the conversion is complete, the ADS7815 sample and
hold returns to the sample mode and begins acquiring the
input signal for the next conversion. Allowing 4
s between
falling edges of the convert pulse signal assures accurate
acquisition of the analog input.
FIGURE 1. Basic Operation.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V
IN
GND
REF
CAP
GND
D15
D14
D13
D12
D11
D10
D9
D8
GND
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+V
S
+V
S
BUSY
CS
R/C
–V
S
D0
D1
D2
D3
D4
D5
D6
D7
ADS7815
R
1
75
+5V
–5V
+
2.2F
C
4
0.1F
C
6
+
2.2F
C
3
0.1F
C
5
Convert Pulse
74HC00
100ns min
Processor
Bus
Processor
Bus
+5V
0.1F
C
1
+
10F
C
2
–5V
OC
0.1F
C
7
+
10F
C
8
2
3
4
5
6
7
8
9
1D
2D
3D
4D
5D
6D
7D
8D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
1
10
OC
CLK
74HC574
2
3
4
5
6
7
8
9
1D
2D
3D
4D
5D
6D
7D
8D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
1
10
OC
CLK
74HC574
R
2
10
OPA628
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