LTC1094C 반도체 회로 부품 판매점
1-/ 2-/ 6- and 8-Channel/ 10-Bit Serial I/O Data Acquisition Systems
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 Linear Technology |
LTC1091/LTC1092
LTC1093/LTC1094
1-, 2-, 6- and 8-Channel, 10-Bit
Serial I/O Data Acquisition Systems
FEATURES
s Programmable Features
– Unipolar/Bipolar Conversions
– Differential/Single-Ended Multiplexer
Configurations
s Sample-and-Holds
s Single Supply 5V, 10V or ±5V Operation
s Direct 3- or 4-Wire Interface to Most MPU Serial
Ports and All MPU Parallel I/O Ports
s Analog Inputs Common Mode to Supply Rails
s Resolution: 10 Bits
s Total Unadjusted Error (A Grade): ±1LSB Over Temp
s Fast Conversion Time: 20µs
s Low Supply Current
LTC1091: 3.5mA Max, 1.5mA Typ
LTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ
DESCRIPTIO
The LTC®1091/LTC1092/LTC1093/LTC1094 10-bit data
acquisition systems are designed to provide complete
function, excellent accuracy and ease of use when digitiz-
ing analog data from a wide variety of signal sources and
transducers. Built around a 10-bit, switched capacitor,
successive approximation A/D core, these devices include
software configurable analog multiplexers and bipolar and
unipolar conversion modes as well as on-chip sample-
and-holds. On-chip serial ports allow efficient data trans-
fer to a wide range of microprocessors and microcontrol-
lers. These circuits can provide a complete data acquisi-
tion system in ratiometric applications or can be used with
an external reference in others.
The high impedance analog inputs and the ability to
operate with reduced spans (below 1V full scale) allow
direct connection to sensors and transducers in many
applications, eliminating the need for gain stages.
An efficient serial port communicates without external
hardware to most MPU serial ports and all MPU parallel
I/O ports allowing eight channels of data to be transmitted
over as few as three wires. This, coupled with low power
consumption, makes remote location possible and facili-
tates transmitting data through isolation barriers.
Temperature drift of offset, linearity and full-scale error
are all extremely low (1ppm/°C typically) allowing all
grades to be specified with offset and linearity errors of
±0.5LSB maximum over temperature. In addition, the A
grade devices are specified with full-scale error and total
unadjusted error (including the effects of offset, linearity
and full-scale errors) of ±1LSB maximum over tempera-
ture. The lower grade has a full-scale specification of
±2LSB for applications where full scale is adjustable or
less critical.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
5V 4.7µF
ANALOG INPUT #1
0V TO 5V RANGE
ANALOG INPUT #2
0V TO 5V RANGE
1
CS
2
CH0
VCC 8
(VREF)
7
CLK
3 LTC1091 6
CH1 DOUT
4
GND
5
DIN
MPU
(e.g., 8051)
P1.4
P1.3
SERIAL DATA LINK
P1.2
1091 TA01
FOR 8051 CODE SEE
APPLICATIONS INFORMATION
SECTION
1.25
VCC = 5V
1.00
0.75
0.50
0.25
0
01 2 345
REFERENCE VOLTAGE (V)
1091 TA02
1
LTC1091/LTC1092
LTC1093/LTC1094
ABSOLUTE AXI U RATI GS (Notes 1, 2)
Supply Voltage (VCC) to GND or V – ........................ 12V Power Dissipation ............................................. 500mW
Negative Supply Voltage (V –) .................... – 6V to GND Operating Temperature Range
Voltage
LTC1091/2/3/4AC, LTC1091/2/3/4C..... – 40°C to 85°C
Analog Reference and LTC1091/2 CS
Inputs ................................. (V–) – 0.3V to (VCC + 0.3V)
Digital Inputs (except LTC1091/2 CS) .. – 0.3V to 12V
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
Digital Outputs ........................ – 0.3V to (VCC + 0.3V)
PACKAGE/ORDER I FOR ATIO
CS 1
CH0 2
CH1 3
GND 4
TOP VIEW
8 VCC (VREF)
7 CLK
6 DOUT
5 DIN
N8 PACKAGE
8-LEAD PDIP
TJMAX = 110°C, θJA = 150°C/W (N)
ORDER PART
NUMBER
LTC1091ACN8
LTC1091CN8
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
COM 7
DGND 8
16 VCC
15 CLK
14 CS
13 DOUT
12 DIN
11 VREF
10 AGND
9 V–
N PACKAGE
SW PACKAGE
16-LEAD PDIP 16-LEAD PLASTIC SO WIDE
TJMAX = 110°C, θJA = 150°C/W (N)
TJMAX = 110°C, θJA = 130°C/W (SW)
LTC1093ACN
LTC1093CN
LTC1093CSW
Consult factory for Industrial and Military grade parts.
CS 1
+IN 2
–IN 3
GND 4
TOP VIEW
8 VCC
7 CLK
6 DOUT
5 VREF
N8 PACKAGE
8-LEAD PDIP
TJMAX = 110°C, θJA = 150°C/W (N)
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
DGND 10
20 DVCC
19 AVCC
18 CLK
17 CS
16 DOUT
15 DIN
14 REF+
13 REF–
12 AGND
11 V –
N PACKAGE
20-LEAD PDIP
TJMAX = 110°C, θJA = 150°C/W (N)
ORDER PART
NUMBER
LTC1092ACN8
LTC1092CN8
LTC1094ACN
LTC1094CN
PRODUCT GUIDE
PART NUMBER
LTC1091
LTC1092
LTC1093
LTC1094
#CHANNELS
2
1
6
8
CONVERSION MODES
UNIPOLAR BIPOLAR
q
q
qq
qq
REDUCED SPAN
CAPABILITY
(SEPARATE VREF)
q
q
q
±5V
CAPABILITY
q
q
Pin-for-Pin 10-Bit Upgrade of ADC0832
Pin-for-Pin 10-Bit Upgrade of ADC0831
2
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