參數(shù)資料
型號(hào): LTC1419C
廠商: Linear Technology Corporation
英文描述: 14-Bit, 800ksps Sampling A/D Converter with Shutdown
中文描述: 14位,800ksps與關(guān)機(jī)采樣A / D轉(zhuǎn)換器
文件頁(yè)數(shù): 6/20頁(yè)
文件大小: 401K
代理商: LTC1419C
6
LTC1419
PU
U
+A
IN
(Pin 1):
±
2.5V Positive Analog Input.
–A
IN
(Pin 2):
±
2.5V Negative Analog Input.
V
REF
(Pin 3):
2.5V Reference Output. Bypass to AGND
with 1
μ
F.
REFCOMP (Pin 4):
4.06V Reference Output. Bypass to
AGND with 10
μ
F tantalum in parallel with 0.1
μ
F or 10
μ
F
ceramic.
AGND (Pin 5):
Analog Ground.
D13 to D6 (Pins 6 to 13):
Three-State Data Outputs.
DGND (Pin 14):
Digital Ground for Internal Logic. Tie to
AGND.
D5 to D0 (Pins 15 to 20):
Three-State Data Outputs.
SHDN (Pin 21):
Power Shutdown Input. Low selects
shutdown. Shutdown mode selected by CS. CS = 0 for
nap mode and CS = 1 for sleep mode.
RD (Pin 22):
Read Input. This enables the output
drivers when CS is low.
U
CONVST (Pin 23):
Conversion Start Signal. This active
low signal starts a conversion on its falling edge.
CS (Pin 24):
Chip Select. The input must be low for the
ADC to recognize CONVST and RD inputs. CS also sets
the shutdown mode when SHDN goes low. CS and
SHDN low select the quick wake-up nap mode. CS high
and SHDN low select sleep mode.
BUSY (Pin 25):
The BUSY output shows the converter
status. It is low when a conversion is in progress. Data
valid on the rising edge of BUSY.
V
SS
(Pin 26):
–5V Negative Supply. Bypass to AGND
with 10
μ
F tantalum in parallel with 0.1
μ
F or 10
μ
F
ceramic.
DV
DD
(Pin 27):
5V Positive Supply. Short to Pin 28.
AV
DD
(Pin 28):
5V Positive Supply. Bypass to AGND
with 10
μ
F tantalum in parallel with 0.1
μ
F or 10
μ
F
ceramic.
14-BIT CAPACITIVE DAC
COMP
REF AMP
2.5V REF
2k
REFCOMP
(4.06V)
C
SAMPLE
C
SAMPLE
D13
D0
BUSY
CONTROL LOGIC
CS
CONVST
RD
SHDN
INTERNAL
CLOCK
ZEROING SWITCHES
DV
DD
V
SS
AV
DD
+A
IN
–A
IN
V
REF
AGND
DGND
14
1419 BD
+
SUCCESSIVE APPROXIMATION
REGISTER
OUTPUT LATCHES
FU
U
W
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