Datasheet LTC1091, LTC1092, LTC1093, LTC1094 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems |
| Páginas / Página | 32 / 1 — FEATURES. Programmable Features. – Unipolar/Bipolar Conversions. – … |
| Formato / tamaño de archivo | PDF / 288 Kb |
| Idioma del documento | Inglés |
FEATURES. Programmable Features. – Unipolar/Bipolar Conversions. – Differential/Single-Ended Multiplexer. Configurations
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LTC1091/LTC1092 LTC1093/LTC1094 1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems and-holds. On-chip serial ports allow efficient data trans-
FEATURES
fer to a wide range of microprocessors and microcontrol- ■
Programmable Features
lers. These circuits can provide a complete data acquisi-
– Unipolar/Bipolar Conversions
tion system in ratiometric applications or can be used with
– Differential/Single-Ended Multiplexer
an external reference in others.
Configurations
■ Sample-and-Holds The high impedance analog inputs and the ability to ■ Single Supply 5V, 10V or ±5V Operation operate with reduced spans (below 1V full scale) allow ■ Direct 3- or 4-Wire Interface to Most MPU Serial direct connection to sensors and transducers in many Ports and All MPU Parallel I/O Ports applications, eliminating the need for gain stages. ■ Analog Inputs Common Mode to Supply Rails An efficient serial port communicates without external ■ Resolution: 10 Bits hardware to most MPU serial ports and all MPU parallel ■ Total Unadjusted Error (A Grade): ±1LSB Over Temp I/O ports allowing eight channels of data to be transmitted ■ Fast Conversion Time: 20µs over as few as three wires. This, coupled with low power ■ Low Supply Current consumption, makes remote location possible and facili- LTC1091: 3.5mA Max, 1.5mA Typ tates transmitting data through isolation barriers. LTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ Temperature drift of offset, linearity and full-scale error are all extremely low (1ppm/°C typically) allowing all
U DESCRIPTIO
grades to be specified with offset and linearity errors of ±0.5LSB maximum over temperature. In addition, the A The LTC®1091/LTC1092/LTC1093/LTC1094 10-bit data grade devices are specified with full-scale error and total acquisition systems are designed to provide complete unadjusted error (including the effects of offset, linearity function, excellent accuracy and ease of use when digitiz- and full-scale errors) of ±1LSB maximum over tempera- ing analog data from a wide variety of signal sources and ture. The lower grade has a full-scale specification of transducers. Built around a 10-bit, switched capacitor, ±2LSB for applications where full scale is adjustable or successive approximation A/D core, these devices include less critical. software configurable analog multiplexers and bipolar and unipolar conversion modes as well as on-chip sample- , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATION
1.25 ) VCC = 5V REF 1.00 5V 4.7µF 1 1024 MPU 0.75 (e.g., 8051) 1 V 8 CC CS P1.4 (VREF) 0.50 ANALOG INPUT #1 2 7 CH0 CLK 0V TO 5V RANGE P1.3 LTC1091 ANALOG INPUT #2 3 6 CH1 D P1.2 0V TO 5V RANGE OUT 0.25 SERIAL DATA LINK 1091 TA01 4 5 GND D LINEARITY ERROR (LSB = • V IN FOR 8051 CODE SEE APPLICATIONS INFORMATION 0 SECTION 0 1 2 3 4 5 REFERENCE VOLTAGE (V) 1091 TA02 1
FEATURES
fer to a wide range of microprocessors and microcontrol- ■
Programmable Features
lers. These circuits can provide a complete data acquisi-
– Unipolar/Bipolar Conversions
tion system in ratiometric applications or can be used with
– Differential/Single-Ended Multiplexer
an external reference in others.
Configurations
■ Sample-and-Holds The high impedance analog inputs and the ability to ■ Single Supply 5V, 10V or ±5V Operation operate with reduced spans (below 1V full scale) allow ■ Direct 3- or 4-Wire Interface to Most MPU Serial direct connection to sensors and transducers in many Ports and All MPU Parallel I/O Ports applications, eliminating the need for gain stages. ■ Analog Inputs Common Mode to Supply Rails An efficient serial port communicates without external ■ Resolution: 10 Bits hardware to most MPU serial ports and all MPU parallel ■ Total Unadjusted Error (A Grade): ±1LSB Over Temp I/O ports allowing eight channels of data to be transmitted ■ Fast Conversion Time: 20µs over as few as three wires. This, coupled with low power ■ Low Supply Current consumption, makes remote location possible and facili- LTC1091: 3.5mA Max, 1.5mA Typ tates transmitting data through isolation barriers. LTC1092/LTC1093/LTC1094: 2.5mA Max, 1mA Typ Temperature drift of offset, linearity and full-scale error are all extremely low (1ppm/°C typically) allowing all
U DESCRIPTIO
grades to be specified with offset and linearity errors of ±0.5LSB maximum over temperature. In addition, the A The LTC®1091/LTC1092/LTC1093/LTC1094 10-bit data grade devices are specified with full-scale error and total acquisition systems are designed to provide complete unadjusted error (including the effects of offset, linearity function, excellent accuracy and ease of use when digitiz- and full-scale errors) of ±1LSB maximum over tempera- ing analog data from a wide variety of signal sources and ture. The lower grade has a full-scale specification of transducers. Built around a 10-bit, switched capacitor, ±2LSB for applications where full scale is adjustable or successive approximation A/D core, these devices include less critical. software configurable analog multiplexers and bipolar and unipolar conversion modes as well as on-chip sample- , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATION
1.25 ) VCC = 5V REF 1.00 5V 4.7µF 1 1024 MPU 0.75 (e.g., 8051) 1 V 8 CC CS P1.4 (VREF) 0.50 ANALOG INPUT #1 2 7 CH0 CLK 0V TO 5V RANGE P1.3 LTC1091 ANALOG INPUT #2 3 6 CH1 D P1.2 0V TO 5V RANGE OUT 0.25 SERIAL DATA LINK 1091 TA01 4 5 GND D LINEARITY ERROR (LSB = • V IN FOR 8051 CODE SEE APPLICATIONS INFORMATION 0 SECTION 0 1 2 3 4 5 REFERENCE VOLTAGE (V) 1091 TA02 1