參數(shù)資料
型號(hào): LTC1272-8CCS
廠商: LINEAR TECHNOLOGY CORP
元件分類: ADC
英文描述: 12-Bit, 3us, 250kHz Sampling A/D Converter
中文描述: 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO24
封裝: PLASTIC, SOIC-24
文件頁(yè)數(shù): 5/20頁(yè)
文件大小: 340K
代理商: LTC1272-8CCS
5
LTC1272
Pin 4
D11
DB11
DB11
Pin 5
D10
DB10
DB10
Pin 6
D9
DB9
DB9
Pin 7
D8
DB8
DB8
Pin 8
D7
DB7
LOW
Pin 9
D6
DB6
LOW
Pin 10
D5
DB5
LOW
Pin 11
D4
DB4
LOW
Pin 13
D3/11
DB3
DB11
Pin 14
D2/10
DB2
DB10
Pin 15
D1/9
DB1
DB9
Pin 16
D0/8
DB0
DB8
MNEMONIC*
HBEN = LOW
HBEN = HIGH
PIU
FU
U
C
U
S
O
TI
Data Bus Output, CS and RD = LOW
V
REF
(Pin 2):
2.42V Reference Output. When plugging into
an AD7572 socket, reverse the reference bypass capacitor
polarity and short the 10
series resistor.
AGND (Pin 3):
Analog Ground.
D11 to D4 (Pins 4-11):
Three-State Data Outputs.
DGND (Pin 12):
Digital Ground.
D3/11 to D0/8 (Pins 13-16):
Three-State Data Outputs.
CLK IN (Pin 17):
Clock Input. An external TTL/CMOS
compatible clock may be applied to this pin or a crystal can
be connected between CLK IN and CLK OUT.
CLK OUT (Pin 18):
Clock Output. An inverted CLK IN signal
appears at this pin.
A
IN
(Pin 1):
Analog Input, 0V to 5V Unipolar Input.
HBEN (Pin 19):
High Byte Enable Input. This pin is used to
multiplex the internal 12-bit conversion result into the
lower bit outputs (D7 to D0/8). See table below. HBEN also
disables conversion starts when HIGH.
RD (Pin 20):
Read Input. This active low signal starts a
conversion when CS and HBEN are low. RD also enables
the output drivers when CS is low.
CS (Pin 21):
The Chip Select Input must be low for the ADC
to recognize RD and HBEN inputs.
BUSY (Pin 22):
The BUSY Output is low when a conver-
sion is in progress.
NC (Pin 23):
Not Connected Internally. The LTC1272 does
not require negative supply. This pin can accommodate
the –15V required by the AD7572 without problems.
V
DD
(Pin 24):
Positive Supply, 5V.
*D11...D0/8 are the ADC data output pins.
DB11...DB0 are the 12-bit conversion results, DB11 is the MSB.
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
Integral Nonlinearity
CODE
0
I
–1.0
1.0
512
1024
4096
LTC1272 TPC01
1536
2048
2560
3072
3584
0
V
DD
= 5V
f
CLK
= 4MHz
0.5
–0.5
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