PIN FUNCTIO
參數資料
型號: LTC1418ACG#TRPBF
廠商: Linear Technology
文件頁數: 26/28頁
文件大小: 0K
描述: IC A/D CONV 14BIT SRL&PAR 28SSOP
標準包裝: 2,000
位數: 14
采樣率(每秒): 200k
數據接口: 串行,并聯(lián)
轉換器數目: 1
功率耗散(最大): 21.5mW 單極;31.5mW 雙極
電壓電源: 雙 ±
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
供應商設備封裝: 28-SSOP
包裝: 帶卷 (TR)
輸入數目和類型: 2 個單端,單極;2 個單端,雙極;1 個差分,單極;1 個差分,雙極
配用: DC178A-ND - BOARD SAR ADC LTC1418
7
LTC1418
PIN FUNCTIONS
UU
U
AIN
+ (Pin 1): Positive Analog Input.
AIN
(Pin 2): Negative Analog Input.
VREF (Pin 3): 2.50V Reference Output. Bypass to AGND
with 1
F.
REFCOMP (Pin 4): 4.096V Reference Bypass Pin.
Bypass to AGND with 10
F tantalum in parallel with 0.1F
ceramic.
AGND (Pin 5): Analog Ground.
D13 to D6 (Pins 6 to 13): Three-State Data Outputs
(Parallel). D13 is the most significant bit.
DGND (Pin 14): Digital Ground for Internal Logic. Tie to
AGND.
D5 (Pin 15): Three-State Data Output (Parallel).
D4 (EXTCLKIN) (Pin 16): Three-State Data Output
(Parallel). Conversion clock input (serial) when Pin 20
(EXT/INT) is tied high.
D3 (SCLK) (Pin 17): Three-State Data Output (Parallel).
Data clock input (serial).
D2 (CLKOUT) (Pin 18): Three-State Data Output (Parallel).
Conversion clock output (serial).
D1 (DOUT) (Pin 19): Three-State Data Output (Parallel).
Serial data output (serial).
D0 (EXT/INT) (Pin 20): Three-State Data Output (Parallel).
Conversion clock selector (serial). An input low enables
the internal conversion clock. An input high indicates an
external conversion clock will be assigned to Pin 16
(EXTCLKIN).
SER/PAR (Pin 21): Data Output Mode.
SHDN (Pin 22): Power Shutdown Input. Low selects
shutdown. Shutdown mode selected by CS. CS = 0 for nap
mode and CS = 1 for sleep mode.
RD (Pin 23): Read Input. This enables the output drivers
when CS is low.
CONVST (Pin 24): Conversion Start Signal. This active low
signal starts a conversion on its falling edge.
CS (Pin 25): Chip Select. This input must be low for the
ADC to recognize the 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 26): The BUSY Output Shows the Converter
Status. It is low when a conversion is in progress.
VSS (Pin 27): Negative Supply, –5V for Bipolar Operation.
Bypass to AGND with 10
F tantalum in parallel with 0.1F
ceramic. Analog ground for unipolar operation.
VDD (Pin 28): 5V Positive Supply. Bypass to AGND with
10
F tantalum in parallel with 0.1F ceramic.
TEST CIRCUITS
1k
CL
DBN
DGND
A) HI-Z TO VOH AND VOL TO VOH
CL
DBN
1k
5V
B) HI-Z TO VOL AND VOH TO VOL
DGND
1418 TC01
Load Circuits for Access Timing
Load Circuits for Output Float Delay
1k
30pF
DBN
A) VOH TO HI-Z
30pF
DBN
1k
5V
B) VOL TO HI-Z
1418 TC02
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