參數(shù)資料
型號: ADS7864YB/2K
廠商: Texas Instruments
文件頁數(shù): 9/27頁
文件大?。?/td> 0K
描述: IC 12BIT 500KHZ 6CH A/D 48-TQFP
產(chǎn)品培訓(xùn)模塊: Data Converter Basics
標(biāo)準(zhǔn)包裝: 2,000
位數(shù): 12
采樣率(每秒): 500k
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 2
功率耗散(最大): 50mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 12 個(gè)單端,雙極;6 個(gè)差分,雙極
配用: 296-30697-ND - EVAL MODULE FOR ADS7864M
www.ti.com
OUTPUT CODE (DB15
…DB0)
HOLDA
HOLDC
BUSY
CS
BYTE
RD
CS
RD
BYTE
A0
A1
B0
B1
C0
C1
A0
LOW
HIGH
LOW
HIGH
LOW
HIGH
ADS7864
SBAS141A – SEPTEMBER 2000 – REVISED MARCH 2005
Table 2. Channel Truth Table
DATA CHANNEL
DB14
DB13
DB12
The ADS7864 has a 16-bit output word. DB15 is ‘1’ if
A0
0
the output contains valid data. This is important for
the FIFO mode. Valid Data can be read until DB15
A1
0
1
switches to 0. DB14, DB13 and DB12 store channel
B0
0
1
0
information as indicated in Table 2 (Channel Truth
B1
0
1
Table). The 12-bit output data is stored from DB11
C0
1
0
(MSB) to DB0 (LSB).
C1
1
0
1
BYTE—If there is only an 8-bit bus available on a
board, then Byte can be set high (see Figure 29 and
Figure 30). In this case, the lower eight bits can be
read at the output pins DB7 to DB0 at the first RD
signal, and the higher bits after the second RD signal.
Figure 29. Reading Data in Cycling Mode
Figure 30. Reading Data in Cycling Mode
17
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