Datasheet LTC1090 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Single Chip 10-Bit Data Acquisition System |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTIO. KEY SPECIFICATIO S. TYPICAL APPLICATIO. Linearity … |
| File Format / Size | PDF / 356 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. KEY SPECIFICATIO S. TYPICAL APPLICATIO. Linearity Plot
Model Line for this Datasheet
Text Version of Document
LTC1090 Single Chip 10-Bit Data Acquisition System
U FEATURES DESCRIPTIO
■ Software Programmable Features: The LTC®1090 is a data acquisition component which Unipolar/Bipolar Conversions contains a serial I/O successive approximation A/D con- 4 Differential/8 Single Ended Inputs verter. It uses LTCMOSTM switched capacitor technology MSB or LSB First Data Sequence to perform either 10-bit unipolar, or 9-bit plus sign bipolar Variable Data Word Length A/D conversions. The 8-channel input multiplexer can be ■ Built-In Sample and Hold configured for either single ended or differential inputs (or ■ Single Supply 5V, 10V or ±5V Operation combinations thereof). An on-chip sample and hold is ■ Direct 4 Wire Interface to Most MPU Serial Ports and included for all single ended input channels. All MPU Parallel Ports The serial I/O is designed to be compatible with industry ■ 30kHz Maximum Throughput Rate standard full duplex serial interfaces. It allows either MSB or LSB first data and automatically provides 2’s
U KEY SPECIFICATIO S
complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 10, ■ Resolution: 10 Bits 12 or 16 bits. This allows easy interface to shift registers ■ Total Unadjusted Error (LTC1090A): ±1/2LSB Max and a variety of processors. ■ Conversion Time: 22µs ■ Supply Current: 2.5mA Max, 1.0mA Typ The LTC1090A is specified with total unadjusted error (including the effects of offset, linearity and gain errors) , LTC and LT are registered trademarks of Linear Technology Corporation. less than ±0.5LSB. LTCMOS is a trademark of Linear Technology Corp. The LTC1090 is specified with offset and linearity less than ±0.5LSB but with a gain error limit of ±2LSB for applications where gain is adjustable or less critical.
U TYPICAL APPLICATIO
FOR 8051 CODE SEE APPLICATIONS INFORMATION SECTION LTC1090 MPU (e.g., 8051)
Linearity Plot
DIFFERENTIAL INPUT 1.0 5V BIPOLAR INPUT 0.5 5V –5V D P1.1 0.0 OUT D P1.2 IN ERROR (LSBs) T SCLK P1.3 – 0.5 UNIPOLAR INPUTS CS P1.4 SERIAL DATA LINK –1.0 0 512 1024 OUTPUT CODE LTC1090 • TA02 (+) – UNIPOLAR (–) INPUT LTC1090 • TA01 –5V 1090fc 1
U FEATURES DESCRIPTIO
■ Software Programmable Features: The LTC®1090 is a data acquisition component which Unipolar/Bipolar Conversions contains a serial I/O successive approximation A/D con- 4 Differential/8 Single Ended Inputs verter. It uses LTCMOSTM switched capacitor technology MSB or LSB First Data Sequence to perform either 10-bit unipolar, or 9-bit plus sign bipolar Variable Data Word Length A/D conversions. The 8-channel input multiplexer can be ■ Built-In Sample and Hold configured for either single ended or differential inputs (or ■ Single Supply 5V, 10V or ±5V Operation combinations thereof). An on-chip sample and hold is ■ Direct 4 Wire Interface to Most MPU Serial Ports and included for all single ended input channels. All MPU Parallel Ports The serial I/O is designed to be compatible with industry ■ 30kHz Maximum Throughput Rate standard full duplex serial interfaces. It allows either MSB or LSB first data and automatically provides 2’s
U KEY SPECIFICATIO S
complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 10, ■ Resolution: 10 Bits 12 or 16 bits. This allows easy interface to shift registers ■ Total Unadjusted Error (LTC1090A): ±1/2LSB Max and a variety of processors. ■ Conversion Time: 22µs ■ Supply Current: 2.5mA Max, 1.0mA Typ The LTC1090A is specified with total unadjusted error (including the effects of offset, linearity and gain errors) , LTC and LT are registered trademarks of Linear Technology Corporation. less than ±0.5LSB. LTCMOS is a trademark of Linear Technology Corp. The LTC1090 is specified with offset and linearity less than ±0.5LSB but with a gain error limit of ±2LSB for applications where gain is adjustable or less critical.
U TYPICAL APPLICATIO
FOR 8051 CODE SEE APPLICATIONS INFORMATION SECTION LTC1090 MPU (e.g., 8051)
Linearity Plot
DIFFERENTIAL INPUT 1.0 5V BIPOLAR INPUT 0.5 5V –5V D P1.1 0.0 OUT D P1.2 IN ERROR (LSBs) T SCLK P1.3 – 0.5 UNIPOLAR INPUTS CS P1.4 SERIAL DATA LINK –1.0 0 512 1024 OUTPUT CODE LTC1090 • TA02 (+) – UNIPOLAR (–) INPUT LTC1090 • TA01 –5V 1090fc 1
