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부품번호 | LTC1854 기능 |
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기능 | 100ksps ADC Converters | ||
제조업체 | Linear Technology | ||
로고 | |||
전체 24 페이지수
FEATURES
■ Single 5V Supply
■ Sample Rate: 100ksps
■ 8-Channel Multiplexer with ±30V Protection
■ ±10V Bipolar Input Range
Single Ended or Differential
■ ±3LSB INL for the LTC1856, ±1.5LSB INL for the
www.DaLtTaCSh1e8e5t54U,.±co1mLSB INL for the LTC1854
■ Power Dissipation: 40mW (Typ)
■ SPI/MICROWIRETM Compatible Serial I/O
■ Power Shutdown: Nap and Sleep
■ SINAD: 87dB (LTC1856)
■ Operates with Internal or External Reference
■ Internal Synchronized Clock
■ 28-Pin SSOP Package
U
APPLICATIO S
■ Industrial Process Control
■ Multiplexed Data Acquisition Systems
■ High Speed Data Acquisition for PCs
■ Digital Signal Processing
LTC1854/LTC1855/LTC1856
8-Channel, ±10V Input
12-/14-/16-Bit, 100ksps ADC
Converters with Shutdown
DESCRIPTIO
The LTC®1854/LTC1855/LTC1856 are 8-channel, low
power, 12-/14-/16-bit, 100ksps, analog-to-digital con-
verters (ADCs). These ADCs operate from a single 5V
supply and the 8-channel multiplexer can be programmed
for single-ended inputs, pairs of differential inputs, or
combinations of both. In addition, all channels are fault
protected to ±30V. A fault condition on any channel will
not affect the conversion result of the selected channel.
An onboard precision reference minimizes external com-
ponents. Power dissipation is 40mW at 100ksps and lower
in two power shutdown modes (27.5mW in Nap mode and
40mW in Sleep mode.) DC specifications include ±3LSB
INL for the LTC1856, ±1.5LSB INL for the LTC1855 and
±1LSB for the LTC1854.
The internal clock is trimmed for 5ms maximum conver-
sion time and the sampling rate is guaranteed at 100ksps.
A separate convert start input and data ready signal (BUSY)
ease connections to FIFOs, DSPs and microprocessors.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
100kHz, 12-Bit/14-/16-Bit Sampling ADC
SOFTWARE-PROGRAMMABLE
SINGLE-ENDED OR
DIFFERENTIAL INPUTS
±10V BIPOLAR INPUT RANGE
COM
CONVST
CH0 LTC1854/ RD
CH1 LTC1855/ SCK
CH2 LTC1856 SDI
CH3 DGND
CH4 SDO
CH5 BUSY
CH6 OVDD
CH7
MUXOUT+
MUXOUT–
DVDD
AVDD
AGND3
ADC+
AGND2
ADC–
REFCOMP
AGND1
VREF
μP
CONTROL
LINES
0.1μF
10μF
10μF
0.1μF
10μF
1μF 10μF 0.1μF
3V TO 5V
5V
5V
0.1μF
2.5V
LTC1856 Typical INL Curve
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
–32768 –16384
0
CODE
16384 32767
185456 G01
185456fa
1
LTC1854/LTC1855/LTC1856
UU
U
I TER AL REFERE CE CHARACTERISTICS The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25∞C. (Note 5)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VREF Output Voltage
VREF Output Temperature Coefficient
VREF Output Impedance
VREFCOMP Output Voltage
IOUT = 0
IOUT = 0
–0.1mA £ IOUT £ 0.1mA
IOUT = 0
● 2.475
2.50
±10
8
4.096
2.525
V
ppm/∞C
kW
V
DIGITAL I PUTS A D DIGITAL OUTPUTS The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at TA = 25∞C. (Note 5)
wwwS.YDMaBtaOSLheetP4AUR.cAoMmETER
VIH High Level Input Voltage
VIL Low Level Input Voltage
IIN Digital Input Current
CIN Digital Input Capacitance
VOH High Level Output Voltage
VOL Low Level Output Voltage
IOZ
COZ
ISOURCE
ISINK
Hi-Z Output Leakage
Hi-Z Output Capacitance
Output Source Current
Output Sink Current
CONDITIONS
VDD = 5.25V
VDD = 4.75V
VIN = 0V to VDD
VDD = 4.75V, IO = –10mA, OVDD = VDD
VDD = 4.75V, IO = –200mA, OVDD = VDD
VDD = 4.75V, IO = 160mA, OVDD = VDD
VDD = 4.75V, IO = 1.6mA, OVDD = VDD
VOUT = 0V to VDD, RD = High
RD = High
VOUT = 0V
VOUT = VDD
MIN
● 2.4
●
●
●4
●
●
TYP MAX UNITS
V
0.8 V
±10 mA
5 pF
4.74 V
V
0.05
0.10 0.4
V
V
±10
15
mA
pF
–10 mA
10 mA
POWER REQUIRE E TS The ● denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25∞C. (Note 5)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Positive Supply Voltage
(Notes 9 and 10)
4.75 5.00 5.25
V
Positive Supply Current
Nap Mode
Sleep Mode
Power Dissipation
Nap Mode
Sleep Mode
CONVST = 0V or 5V
CONVST = 0V or 5V
● 8.0 12 mA
5.5 7 mA
8.0 13
mA
40.0 mW
27.5 mW
40.0 mW
185456fa
4
4페이지 LTC1854/LTC1855/LTC1856
TYPICAL PERFOR A CE CHARACTERISTICS
LTC1856 SINAD
vs Input Frequency
90
LTC1856 Total Harmonic
Distortion vs Input Frequency
–70
88
86 –80
84
82 –90
80
w
w
78
w.
D
a
t
a
S
h
e
e
t
4
U
–. 100c
o
m
76
74
1
10
INPUT FREQUENCY (kHz)
100
185456 G10
–110
1
10
INPUT FREQUENCY (kHz)
100
185456 G11
LTC1855 SINAD
vs Input Frequency
85
LTC1855 Total Harmonic
Distortion vs Input Frequency
–60
LTC1856 Channel-to-Channel
Offset Error Matching vs
Temperature
1.0
0.5
0
–0.5
–1.0
–50
–25 0 25 50
TEMPERATURE (°C)
75 100
185456 G12
LTC1855 Channel-to-Channel
Offset Error Matching vs
Temperature
0.5
80 –70
75 –80
70 –90
65
60
1
10
INPUT FREQUENCY (kHz)
100
185456 G13
LTC1854 SINAD
vs Input Frequency
80
75
70
65
–100
–110
1
10
INPUT FREQUENCY (kHz)
100
185456 G14
LTC1854 Total Harmonic
Distortion vs Input Frequency
–60
–70
–80
–90
–100
60
1
10
INPUT FREQUENCY (kHz)
100
185456 G16
–110
1
10
INPUT FREQUENCY (kHz)
100
185456 G17
0.25
0
–0.25
–0.5
–50 –25
0
25 50 75
TEMPERATURE (°C)
100
185456 G15
LTC1854 Channel-to-Channel
Offset Error Matching vs
Temperature
0.25
0.20
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
–0.20
–0.25
–50 –25
0
25 50
TEMPERATURE (°C)
75
100
185456 G18
185456fa
7
7페이지 | |||
구 성 | 총 24 페이지수 | ||
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |