LTC1290DMJ 반도체 회로 부품 판매점
Single Chip 12-Bit Data Acquisition System
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 Linear Technology |
LTC1290
Single Chip 12-Bit Data
Acquisition System
FEATURES
s Software Programmable Features
– Unipolar/Bipolar Conversion
– Four Differential/Eight Single-Ended Inputs
– MSB- or LSB-First Data Sequence
– Variable Data Word Length
– Power Shutdown
s Built-In Sample-and-Hold
s Single Supply 5V or ±5V Operation
s Direct Four-Wire Interface to Most MPU Serial Ports
and All MPU Parallel Ports
s 50kHz Maximum Throughput Rate
KEY SPECIFICATIO S
s Resolution: 12 Bits
s Fast Conversion Time: 13µs Max Over Temp
s Low Supply Current: 6.0mA
DESCRIPTIO
The LTC®1290 is a data acquisition component which
contains a serial I/O successive approximation A/D con-
verter. It uses LTCMOSTM switched capacitor technology
to perform either 12-bit unipolar or 11-bit plus sign bipolar
A/D conversions. The 8-channel input multiplexer can be
configured for either single-ended or differential inputs (or
combinations thereof). An on-chip sample-and-hold is
included for all single-ended input channels. When the
LTC1290 is idle it can be powered down with a serial word
in applications where low power consumption is desired.
The serial I/O is designed to be compatible with industry
standard full duplex serial interfaces. It allows either MSB-
or LSB-first data and automatically provides 2's comple-
ment output coding in the bipolar mode. The output data
word can be programmed for a length of 8, 12 or 16 bits.
This allows easy interface to shift registers and a variety of
processors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
LTCMOS is a trademark of Linear Technology Corporation.
TYPICAL APPLICATI
12-Bit 8-Channel Sampling Data Acquisition System
SINGLE-ENDED INPUT
0V TO 5V OR ±5V
±15V OVERVOLTAGE RANGE*
1k
•
•
•
DIFFERENTIAL INPUT (+)
±5V COMMON MODE RANGE (–)
•
•
•
CH0 VCC
CH1 ACLK
CH2 SCLK
CH3 DIN
CH4 DOUT
LTC1290
CH5 CS
CH6 REF +
CH7 REF –
COM
V–
+
22µF
TANTALUM
TO AND FROM
MICROPROCESSOR
1N5817
5V
1N4148
+
4.7µF
TANTALUM
–5V
LT®1027
8V TO 40V
1µF
DGND
AGND
0.1µF
1N5817
1290 • TA01
* FOR OVERVOLTAGE PROTECTION ON ONLY ONE CHANNEL LIMIT THE INPUT CURRENT TO 15mA. FOR OVERVOLTAGE PROTECTION
ON MORE THAN ONE CHANNEL LIMIT THE INPUT CURRENT TO 7mA PER CHANNEL AND 28mA FOR ALL CHANNELS. (SEE SECTION ON
OVERVOLTAGE PROTECTION IN THE APPLICATIONS INFORMATION SECTION.) CONVERSION RESULTS ARE NOT VALID WHEN THE SELECTED
OR ANY OTHER CHANNEL IS OVERVOLTAGED (VIN < V– OR VIN > VCC).
1
LTC1290
ABSOLUTE AXI U RATI GS (Notes 1, 2)
Supply Voltage (VCC) to GND or V – ........................ 12V
Negative Supply Voltage (V –) .................... – 6V to GND
Voltage
Analog/Reference Inputs ......... (V–) – 0.3V to VCC + 0.3V
Digital Inputs ........................................ – 0.3V to 12V
Digital Outputs ........................... – 0.3V to VCC + 0.3V
Power Dissipation ............................................. 500mW
Operating Temperature Range
LTC1290BC, LTC1290CC, LTC1290DC .... 0°C to 70°C
LTC1290BI, LTC1290CI, LTC1290DI .... – 40°C to 85°C
LTC1290BM, LTC1290CM,
LTC1290DM....................................... – 55°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec.)................ 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
DGND 10
20 VCC
19 ACLK
18 SCLK
17 DIN
16 DOUT
15 CS
14 REF+
13 REF–
12 V –
11 AGND
J PACKAGE
20-LEAD CERAMIC DIP
N PACKAGE
20-LEAD PDIP
TJMAX = 150°C, θJA = 80°C/W (J)
TJMAX = 110°C, θJA = 100°C/W (N)
ORDER PART
NUMBER
LTC1290BMJ
LTC1290CMJ
LTC1290DMJ
LTC1290BIJ
LTC1290CIJ
LTC1290DIJ
LTC1290BIN
LTC1290CIN
LTC1290DIN
LTC1290BCN
LTC1290CCN
LTC1290DCN
CH0 1
CH1 2
CH2 3
CH3 4
CH4 5
CH5 6
CH6 7
CH7 8
COM 9
DGND 10
TOP VIEW
20 VCC
19 ACLK
18 SCLK
17 DIN
16 DOUT
15 CS
14 REF+
13 REF –
12 V –
11 AGND
SW PACKAGE
20-LEAD PLASTIC SO WIDE
TJMAX = 110°C, θJA = 130°C/W (SW)
ORDER PART
NUMBER
LTC1290BCSW
LTC1290CCSW
LTC1290DCSW
LTC1290BISW
LTC1290CISW
LTC1290DISW
U UW
CO VERTER A D ULTIPLEXER CHARACTERISTICS (Note 3)
PARAMETER
CONDITIONS
Offset Error
(Note 4)
Linearity Error (INL)
(Notes 4,5)
Gain Error
(Note 4)
Minimum Resolution for Which
No Missing Codes are Guaranteed
Analog and REF Input Range
(Note 7)
On Channel Leakage Current
(Note 8)
On Channel = 5V
Off Channel = 0V
On Channel = 0V
Off Channel = 5V
Off Channel Leakage Current
(Note 8)
On Channel = 5V
Off Channel = 0V
On Channel = 0V
Off Channel = 5V
LTC1290B
MIN TYP MAX
q ±1.5
q ±0.5
q ±0.5
q 12
LTC1290C
MIN TYP MAX
±1.5
±0.5
±1.0
12
LTC1290D
MIN TYP MAX
±1.5
±0.75
±4.0
12
UNITS
LSB
LSB
LSB
Bits
(V–) – 0.05V to VCC + 0.05V (V–) – 0.05V to VCC + 0.05V (V–) – 0.05V to VCC + 0.05V
q ±1 ±1 ±1
V
µA
q ±1 ±1 ±1 µA
q ±1 ±1 ±1 µA
q ±1 ±1 ±1 µA
2
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관련 데이터시트
LTC1290DM
Single Chip 12-Bit Data Acquisition System - Linear Technology
LTC1290DMJ
Single Chip 12-Bit Data Acquisition System - Linear Technology