參數(shù)資料
型號: TLV571IDWG4
廠商: TEXAS INSTRUMENTS INC
元件分類: ADC
英文描述: 1-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO24
封裝: GREEN, PLASTIC, SOIC-24
文件頁數(shù): 12/28頁
文件大?。?/td> 479K
代理商: TLV571IDWG4
TLV571
2.7 V TO 5.5 V, 1-CHANNEL, 8-BIT,
PARALLEL ANALOG-TO-DIGITAL CONVERTER
SLAS239A – SEPTEMBER 1999 – REVISED FEBRUARY 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional block diagram
Internal
Clock
CLK
CS
RD
INT/EOC
MUX
8-BIT
SAR ADC
Input Registers
and Control Logic
WR
CSTART
REFP
Three
State
Latch
AVDD
D0 – D5
D6/A0
D7/A1
REFM
DVDD
DGND
AGND
AIN
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
AGND
21
Analog ground
AIN
23
I
ADC analog input
AVDD
22
Analog supply voltage, 2.7 V to 5.5 V
A0/D6
16
I/O
Bidirectional 3-state data bus. D6/A0 along with D7/A1 is used as address lines to access CR0 and CR1 for
initialization.
A1/D7
17
I/O
Bidirectional 3-state data bus. D7/A1 along with D6/A0 is used as address lines to access CR0 and CR1 for
initialization.
CLK
4
I
External clock input
CS
1
I
Chip select. A logic low on CS enables the TLV571.
CSTART
18
I
Hardware sample and conversion start input. The falling edge of CSTART starts sampling and the rising edge
of CSTART starts conversion.
DGND
5, 8, 9
Digital ground
DVDD
6
Digital supply voltage, 2.7 V to 5.5 V
D0 – D5
10 –15
I/O
Bidirectional 3-state data bus
INT/EOC
7
O
End-of-conversion/interrupt
NC
24
Not connected
RD
3
I
Read data. A falling edge on RD enables a read operation on the data bus when CS is low.
REFM
20
I
Lower reference voltage (nominally ground). REFM must be supplied or REFM pin must be grounded.
REFP
19
I
Upper reference voltage (nominally AVDD). The maximum input voltage range is determined by the difference
between the voltage applied to REFP and REFM.
WR
2
I
Write data. A rising edge on the WR latches in configuration data when CS is low. When using software
conversion start, a rising edge on WR also initiates an internal sampling start pulse. When WR is tied to ground,
the ADC in nonprogrammable (hardware configuration mode).
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