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參數(shù)資料
| 型號： | THS1009CDAR |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 10-BIT, 2 ANALOG INPUT, 8 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 10位，2個模擬輸入，8 MSPS的同步采樣模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 5/31頁 |
| 文件大?。?/td> | 235K |
| 代理商： | THS1009CDAR |
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SLAS287A
–
AUGUST 2000
–
REVISED DECEMBER 2002
www.ti.com
5
Terminal Functions
TERMINAL
NAME
I/O
DESCRIPTION
NO.
AINP
30
I
Analog input, single-ended or positive input of differential channel A
AINM
29
I
Analog input, single-ended or negative input of differential channel A
AVDD
AGND
23
I
Analog supply voltage
24
I
Analog ground
BVDD
BGND
7
I
Digital supply voltage for buffer
8
I
Digital ground for buffer
CONV_CLK
15
I
Digital input. This input is the conversion clock input.
CS0
22
I
Chip select input (active low)
CS1
21
I
Chip select input (active high)
SYNC
16
O
Synchronization output. This signal indicates in a multichannel operation that data of channel A is brought to the
digital output and can therefore be used for synchronization.
DGND
17
I
Digital ground. Ground reference for digital circuitry.
DVDD
D0
–
D9
18
I
Digital supply voltage
1
–
6,
9
–
12
I/
O/Z
Digital input, output; D0 = LSB
RA0
13
I
Digital input. RA0 is used as an address line (RA0) for the control register. This is required for writing to control
register 0 and control register 1. See Table 7.
RA1
14
I
Digital input. RA1 is used as an address line (RA1) for the control register. This is required for writing to control
register 0 and control register 1. See Table 7.
NC
32
O
Not connected
REFIN
28
I
Common-mode reference input for the analog input channels. It is recommended that this pin be connected to the
reference output REFOUT.
REFP
26
I
Reference input, requires a bypass capacitor of 10
μ
F to AGND in order to bypass the internal reference voltage.
An external reference voltage at this input can be applied. This option can be programmed through control
register 0. See Table 8.
Reference input, requires a bypass capacitor of 10
μ
F to AGND in order to bypass the internal reference voltage.
An external reference voltage at this input can be applied. This option can be programmed through control
register 0. See Table 8.
REFM
25
I
RESET
31
I
Hardware reset of the THS1009. Sets the control register to default values.
Analog fixed reference output voltage of 2.5 V. Sink and source capability of 250
μ
A. The reference output requires
a capacitor of 10
μ
F to AGND for filtering and stability.
The RD input is used only if the WR input is configured as a write only input. In this case, it is a digital input, active
low as a data read select from the processor. See timing section.
REFOUT
27
O
RD(1)
19
I
WR (R/W)(1)
20
I
This input is programmable. It functions as a read-write input (R/W) and can also be configured as a write-only input
(WR), which is active low and used as data write select from the processor. In this case, the RD input is used as a
read input from the processor. See timing section.
(1)The start-conditions of RD and WR (R/W) are unknown. The first access to the ADC has to be a write access to initialize the ADC.
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