參數(shù)資料
型號(hào): LTC1283CN#TRPBF
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
封裝: LEAD FREE, PLASTIC, DIP-20
文件頁(yè)數(shù): 15/24頁(yè)
文件大?。?/td> 338K
代理商: LTC1283CN#TRPBF
22
LTC1283
1283fb
U
S
A
O
PPLICATI
TYPICAL
A “Quick Look” Circuit for the LTC1283
SNEAK-A-BIT is a trademark of Linear Technology Corp.
SNEAK-A-BIT
TM
The LTC1283’s unique ability to software select the polar-
ity of the differential inputs and the output word length is
used to achieve one more bit of resolution. Using the
circuit below with two conversions and some software, a
2’s complement 10-bit + sign word is returned to memory
inside the MPU. The MC68HC05C4 was chosen as an
example; however, any processor could be used.
Two 10-bit unipolar conversions are performed: the first
over a 0V to 3V span and the second over a 0V to – 3V span
(by reversing the polarity of the inputs). The sign of the
input is determined by which of the two spans contain it.
Then the resulting number (ranging from – 1023 to 1023
decimal) is converted to 2’s complement notation and
stored in RAM.
SNEAK-A-BIT Code
LTC1283 TA05
MC68HC05C4
SCK
MOSI
MISO
CO
–3V
0.1
μF
1MHz
CLOCK
OTHER
CHANNELS
OR
SNEAK-A-BIT
INPUTS
3V
LTC1283
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
VCC
ACLK
SCLK
DIN
DOUT
CS
REF+
REF
V
AGND
10
μF
VIN
–3V TO 3V
SNEAK-A-BIT Circuit
DOUT from LTC1283 in MC68HC05C4
B10 B9
B8
B7
B6
B5
B4
B3
SIGN
LSB
LTC1283 TA07
B2
B1
B0
FILLED WITH 0’s
LOCATION $77
LOCATION $87
DIN Words for LTC1283
00
1
UNI
LTC1283 TA08
DIN 1
MSBF
WORD
LENGTH
(ODD/SIGN)
MUX ADDR.
01
1
DIN 2
00
1
DIN 3
LTC1283 TA03
LTC1283
0.1
μF
4.7
μF
f
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
VIN
{
TO
OSCILLOSCOPE
CD4520
CLK
EN
Q1
Q2
Q3
Q4
RESET
VSS
CLOCK IN
500kHz MAX
3V
VCC
ACLK
SCLK
DIN
DOUT
CS
REF+
REF
V
AGND
VDD
RESET
Q4
Q3
Q2
Q1
EN
CLK
f/64
相關(guān)PDF資料
PDF描述
LTC1283CN#TR 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
LTC1283CS#PBF 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
LTC1283ACS#PBF 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
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