tSMPL Analog Input Sample Ti" />
參數(shù)資料
型號: LTC1594LCS#PBF
廠商: Linear Technology
文件頁數(shù): 19/24頁
文件大?。?/td> 0K
描述: IC A/D CONV 12BIT SRL 4CH 16SOIC
標準包裝: 50
位數(shù): 12
采樣率(每秒): 10.5k
數(shù)據(jù)接口: MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 1.6mW
電壓電源: 單電源
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 16-SOIC
包裝: 管件
輸入數(shù)目和類型: 8 個單端,單極
4
LTC1594L/LTC1598L
15948lfb
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tSMPL
Analog Input Sample Time
See Figure 1 in Applications Information
1.5
CLK Cycles
fSMPL(MAX)
Maximum Sampling Frequency
See Figure 1 in Applications Information
q
10.5
kHz
tCONV
Conversion Time
See Figure 1 in Applications Information
12
CLK Cycles
tdDO
Delay Time, CLK
↓ to DOUT Data Valid
See Test Circuits
q
600
1500
ns
tdis
Delay Time, CS
↑ to DOUT Hi-Z
See Test Circuits
q
220
600
ns
ten
Delay Time, CLK
↓ to DOUT Enabled
See Test Circuits
q
180
500
ns
thDO
Time Output Data Remains Valid After CLK
CLOAD = 100pF
520
ns
tf
DOUT Fall Time
See Test Circuits
q
60
180
ns
tr
DOUT Rise Time
See Test Circuits
q
80
180
ns
tON
Enable Turn-On Time
See Figure 1 in Applications Information
q
540
1200
ns
tOFF
Enable Turn-Off Time
See Figure 2 in Applications Information
q
190
500
ns
tOPEN
Break-Before-Make Interval
q
125
350
ns
CIN
Input Capacitance
Analog Inputs On-Channel
20
pF
Off-Channel
5
pF
Digital Input
5
pF
AC CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: All voltage values are with respect to GND.
Note 3: These devices are specified at 3V. Consult factory for 5V
specified devices (LTC1594/LTC1598).
Note 4: Increased leakage currents at elevated temperatures cause the S/H
to droop, therefore it is recommended that fCLK ≥ 200kHz at 85°C,
fCLK ≥ 75kHz at 70°C and fCLK ≥ 1kHz at 25°C.
Note 5: VCC = 2.7V, VREF = 2.5V and CLK = 200kHz unless otherwise
specified. CSADC and CSMUX pins are tied together during the test.
Note 6: Linearity error is specified between the actual end points of the
A/D transfer curve.
Note 7: Two on-chip diodes are tied to each reference and analog input
which will conduct for reference or analog input voltages one diode drop
below GND or one diode drop above VCC. This spec allows 50mV forward
bias of either diode for 2.7V
≤ VCC ≤ 3.6V. This means that as long as the
reference or analog input does not exceed the supply voltage by more than
50mV, the output code will be correct. To achieve an absolute 0V to 3V
input voltage range, it will therefore require a minimum supply voltage of
2.950V over initial tolerance, temperature variations and loading.
Note 8: Recommended operating condition.
Note 9: Channel leakage current is measured after the channel selection.
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
Supply Current vs Sample Rate
Reference Current vs Temperature
Supply Current vs Temperature
SAMPLE FREQUENCY (kHz)
0.1
1
SUPPLY
CURRENT
(
A)
10
100
1000
1
10
100
1594L/98L G01
TA = 25°C
VCC = 2.7V
VREF = 2.5V
fCLK = 200kHz
TEMPERATURE (
°C)
–55
60
SUPPLY
CURRENT
(
A)
100
180
220
260
–15
25
45
125
1594L/98L G02
140
–35
5
65
85 105
TA = 25°C
VCC = 2.7V
VREF = 2.5V
fCLK = 200kHz
fSMPL = 10.5kHz
TEMPERATURE (
°C)
–55
43
REFERENCE
CURRENT
(
A)
44
46
47
48
53
50
–15
25
45
125
1594L/98L G03
45
51
52
49
–35
5
65
85 105
VCC = 2.7V
VREF = 2.5V
fCLK = 200kHz
fSMPL = 10.5kHz
The q denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C.(Note 5)
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