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| 型號： | THS1206MDA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 4-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO32 |
| 封裝： | PLASTIC, TSSOP-32 |
| 文件頁數(shù)： | 42/44頁 |
| 文件大小： | 548K |
| 代理商： | THS1206MDA |
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THS1206
SLAS217H – MAY 1999 – REVISED JULY 2003#
www.ti.com
7
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
AINP
32
I
Analog input, single-ended or positive input of differential channel A
AINM
31
I
Analog input, single-ended or negative input of differential channel A
BINP
30
I
Analog input, single-ended or positive input of differential channel B
BINM
29
I
Analog input, single-ended or negative input of differential channel B
AVDD
23
I
Analog supply voltage
AGND
24
I
Analog ground
BVDD
7
I
Digital supply voltage for buffer
BGND
8
I
Digital ground for buffer
CONV_CLK
(CONVST)
15
I
Digital input. This input is used to apply an external conversion clock in continuous conversion mode. In single
conversion mode, this input functions as the conversion start (CONVST) input. A high to low transition on this
input holds simultaneously the selected analog input channels and initiates a single conversion of all selected
analog inputs.
CS0
22
I
Chip select input (active low)
CS1
21
I
Chip select input (active high)
DATA_AV
16
O
Data available signal, which can be used to generate an interrupt for processors and as a level information of
the internal FIFO. This signal can be configured to be active low or high and can be configured as a static level or
pulse output. See Table 14.
DGND
17
I
Digital ground. Ground reference for digital circuitry.
DVDD
18
I
Digital supply voltage
D0 – D9
1–6,
9–12
I/O/Z
Digital input, output; D0 = LSB
D10/RA0
13
I/O/Z
Digital input, output. The data line D10 is also used as an address line (RA0) for the control register. This is
required for writing to the control register 0 and control register 1. See Table 8.
D11/RA1
14
I/O/Z
Digital input, output (D11 = MSB). The data line D11 is also 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 8.
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
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 9.
REFM
25
I
Reference input, requires a bypass capacitor of 10
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 9.
REFOUT
27
O
Analog fixed reference output voltage of 2.5 V. Sink and source capability of 250
A. The reference output
requires a capacitor of 10
F to AGND for filtering and stability.
RD(1)
19
I
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.
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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