參數(shù)資料
型號: LTC1090M
廠商: Linear Technology Corporation
英文描述: Single Chip 10-Bit Data Acquisition System
中文描述: 單芯片10位數(shù)據(jù)采集系統(tǒng)
文件頁數(shù): 9/28頁
文件大?。?/td> 344K
代理商: LTC1090M
9
LTC1090
1090fc
TYPICAL PERFOR U
Digital Input Logic Threshold vs
Supply Voltage
Input Channel Leakage Current
vs Temperature
Noise Error vs Reference Voltage
The LTC1090 is a data acquisition component which
contains the following functional blocks:
1. 10-bit successive approximation capacitive
A/D converter
2. Analog multiplexer (MUX)
3. Sample and hold (S/H)
4. Synchronous, full duplex serial interface
5. Control and timing logic
DIGITAL CONSIDERATIONS
1. Serial Interface
The LTC1090 communicates with microprocessors and
other external circuitry via a synchronous, full duplex,
four wire serial interface (see Operating Sequence). The
shift clock (SCLK) synchronizes the data transfer with
each bit being transmitted on the falling SCLK edge
and captured on the rising SCLK edge in both transmit-
ting and receiving systems. The data is transmitted and
received simultaneously (full duplex).
Operating Sequence
(Example: Differential Inputs (CH3 to CH2), Bipolar, MSB First and 10-Bit Word Length)
REFERENCE VOLTAGE, V
REF
(V)
0.2
P
0.5
1.0
2.0
1
5
LTC1090 TPC21
1.5
0.25
0.75
1.75
1.25
LTC1090 NOISE = 200
μ
V PEAK-TO-PEAK
APPLICATIOU
W
U
U
SUPPLY VOLTAGE, V
CC
(V)
4
0
L
1
2
3
4
5
6
7
8
LTC1090 TPC19
9
10
T
A
= 25
°
C
AMBIENT TEMPERATURE, T
A
(
°
C)
–50
I
100
300
400
500
1000
700
0
50
75
LTC1090 TPC20
200
800
900
600
–25
25
100
125
GUARANTEED
ON CHANNEL
OFF CHANNELS
LTC1090 AI01
B9
(SB)
SHIFT A/D RESULT OUT AND
NEW CONFIGURATION WORD IN
B8
B7
B6
B5
B4
B3
B2
B1
B0
SHIFT CONFIGURATION
WORD IN
ODD/
SIGN
SGL/
DIFF
SEL1
D
IN
CS
1
5
8
10
SCLK
D
OUT
SEL0 UNI MSBF WL1 WL0
t
CYC
t
SMPL
t
CONV
DON’T CARE
DON’T CARE
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