VREF (Pin 1): Reference Input. The reference input defines
參數(shù)資料
型號(hào): LTC1285CN8
廠商: Linear Technology
文件頁(yè)數(shù): 22/24頁(yè)
文件大?。?/td> 0K
描述: IC A/D CONV SAMPLING 12BIT 8-DIP
標(biāo)準(zhǔn)包裝: 50
位數(shù): 12
采樣率(每秒): 7.5k
數(shù)據(jù)接口: MICROWIRE?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 480µW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 通孔
封裝/外殼: 8-DIP(0.300",7.62mm)
供應(yīng)商設(shè)備封裝: 8-PDIP
包裝: 管件
輸入數(shù)目和類(lèi)型: 1 個(gè)差分,單極
7
LTC1285/LTC1288
LTC1285
VREF (Pin 1): Reference Input. The reference input defines
the span of the A/D converter.
IN+ (Pin 2): Positive Analog Input.
IN (Pin 3): Negative Analog Input.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
CS/SHDN (Pin 5): Chip Select Input. A logic low on this
input enables the LTC1285. A logic high on this input
disables and powers down the LTC1285.
DOUT (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this output.
CLK (Pin 7): Shift Clock. This clock synchronizes the serial
data transfer and determines conversion speed.
VCC (Pin 8): Power Supply Voltage. This pin provides
power to the A/D converter. It must be kept free of noise
and ripple by bypassing directly to the analog ground
plane.
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Minimum Clock Frequency
for 0.1 LSB Error vs Temperature
TEMPERATURE (°C)
0
CLOCK
FREQUENCY
(kHz)
80
100
120
40
LTC1285/88 TPC22
60
40
0
10
20
30
60
70
50
20
2
VCC = 2.7V
VREF = 2.5V
TEMPERATURE (°C)
–55
LEAKAGE
CURRENT
(nA)
10
100
1000
105
LTC1285/88 TPC24
1
0.1
0.01
–15
25
65
–35
125
5
45
85
VCC = 2.7V
VREF = 2.5V
ON CHANNEL
OFF CHANNEL
Input Channel Leakage Current
vs Temperature
Digital Input Logic Threshold
vs Supply Voltage
SUPPLY VOLTAGE (V)
2.5
DIGITAL
INPUT
LOGIC
THRESHOLD
VOLTAGE
(V)
2.0
2.5
3.0
4.0
5.0
LTC1285/88 TPC23
1.5
1.0
3.0
3.5
4.5
5.5
6.0
0.5
0
TA = 25°C
PIN FUNCTIONS
UU
U
LTC1288
CS/SHDN (Pin 1): Chip Select Input. A logic low on this
input enables the LTC1288. A logic high on this input
disables and powers down the LTC1288.
CH0 (Pin 2): Analog Input.
CH1 (Pin 3): Analog Input.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
DIN (Pin 5): Digital Data Input. The multiplexer address is
shifted into this input.
DOUT (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this output.
CLK (Pin 7): Shift Clock. This clock synchronizes the
serial data transfer and determines conversion speed.
VCC/VREF (Pin 8): Power Supply and Reference Voltage.
This pin provides power and defines the span of the A/D
converter. It must be kept free of noise and ripple by
bypassing directly to the analog ground plane.
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