參數(shù)資料
型號(hào)： LTC2308IUF#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 16/20頁(yè)
文件大小： 0K
描述： IC ADC 12BIT 8CH 500KSPS 24-QFN
標(biāo)準(zhǔn)包裝： 91
位數(shù)： 12
采樣率（每秒）： 500k
數(shù)據(jù)接口： MICROWIRE?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 17.5mW
電壓電源： 單電源
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 24-QFN 裸露焊盤(pán)（4x4）
包裝： 管件
輸入數(shù)目和類型： 8 個(gè)單端，單極；8 個(gè)單端，雙極；4 個(gè)差分，單極；4 個(gè)差分，雙極
產(chǎn)品目錄頁(yè)面： 1349 (CN2011-ZH PDF)
配用： DC1186A-ND - BOARD SAR ADC LTC2308
LTC2308
5
2308fb
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltage values are with respect to ground with AVDD, DVDD and
OVDD wired together (unless otherwise noted).
Note 3: When these pin voltages are taken below ground or above VDD,
they will be clamped by internal diodes. These products can handle input
currents greater than 100mA below ground or above VDD without latchup.
Note 4: AVDD = 5V, DVDD = 5V, OVDD = 5V, fSMPL = 500kHz, internal
reference unless otherwise specied.
Note 5: Linearity, offset and full-scale specications apply for a single-
ended analog input with respect to COM.
Note 6: Integral nonlinearity is dened as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
TIMING CHARACTERISTICS The l denotes the specications which apply over the full operating temperature
range, otherwise specications are at TA = 25°C. (Note 4)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
fSMPL(MAX)
Maximum Sampling Frequency
l
500
kHz
fSCK
Shift Clock Frequency
l
40
MHz
tWHCONV
CONVST High Time
(Note 9)
l
20
ns
tHD
Hold Time SDI After SCK↑
l
2.5
ns
tSUDI
Setup Time SDI Valid Before SCK↑
l
0ns
tWHCLK
SCK High Time
fSCK = fSCK(MAX)
l
10
ns
tWLCLK
SCK Low Time
fSCK = fSCK(MAX)
l
10
ns
tWLCONVST
CONVST Low Time During Data Transfer
(Note 9)
l
410
ns
tHCONVST
Hold Time CONVST Low After Last SCK↓
(Note 9)
l
20
ns
tCONV
Conversion Time
l
1.3
1.6
μs
tACQ
Acquisition Time
7th SCK↑ to CONVST↑ (Note 9)
l
240
ns
tREFWAKE
REFCOMP Wakeup Time (Note 12)
CREFCOMP = 10μF, CREF = 2.2μF
200
ms
tdDO
SDO Data Valid After SCK↓
CL = 25pF (Note 9)
l
10.8
12.5
ns
thDO
SDO Hold Time After SCK↓
CL = 25pF
l
4ns
ten
SDO Valid After CONVST↓
CL = 25pF
l
11
15
ns
tdis
Bus Relinquish Time
CL = 25pF
l
11
15
ns
tr
SDO Rise Time
CL = 25pF
4
ns
tf
SDO Fall Time
CL = 25pF
4
ns
tCYC
Total Cycle Time
2μs
Note 7: Bipolar zero error is the offset voltage measured from –0.5LSB
when the output code ickers between 0000 0000 0000 and 1111 1111
1111. Unipolar zero error is the offset voltage measured from +0.5LSB
when the output code ickers between 0000 0000 0000 and
0000 0000 0001.
Note 8: Full-scale bipolar error is the worst-case of –FS or +FS untrimmed
deviation from ideal rst and last code transitions and includes the effect
of offset error. Unipolar full-scale error is the deviation of the last code
transition from ideal and includes the effect of offset error.
Note 9: Guaranteed by design, not subject to test.
Note 10: All specications in dB are referred to a full-scale ±2.048V input
with a 2.5V reference voltage.
Note 11: Full linear bandwidth is dened as the full-scale input frequency
at which the SINAD degrades to 60dB or 10 bits of accuracy.
Note 12: REFCOMP wakeup time is the time required for the REFCOMP pin
to settle within 0.5LSB at 12-bit resolution of its nal value after waking up
from SLEEP mode.
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