LINEAR TECHNOLOGY LTC1091 LTC1092 LTC1093 LTC1094 User Manual
Summary
These high-precision 10-Bit Serial I/O Data Acquisition Systems are versatile sample-and-hold units designed for complex analog data collection. The manual details their ability to provide up to eight channels of multi-mode acquisition, supporting both unipolar and bipolar conversions directly from sensors or transceivers. Ideal for sophisticated microprocessors and industrial applications, these ADCs feature extremely low power consumption and minimal error rates (–1LSB max). They deliver reliable, multichannel signal interfacing with streamlined connections, making them perfect for remote monitoring and demanding automation systems.
Page 1 Text Content
LTC1091/LTC1092 LTC1093/LTC1094
1-, 2-, 6- and 8-Channel, 10-Bit Serial I/O Data Acquisition Systems
FEATURES and-holds. On-chip serial ports allow efficient data trans- 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
The high impedance analog inputs and the ability to
Sample-and-Holds
operate with reduced spans (below 1V full scale) allow
Single Supply 5V, 10V or ±5V Operation
direct connection to sensors and transducers in many
Direct 3- or 4-Wire Interface to Most MPU Serial
applications, eliminating the need for gain stages.
Ports and All MPU Parallel I/O Ports 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: 3.5m A Max, 1.5m A Typ tates transmitting data through isolation barriers. LTC1092/LTC1093/LTC1094: 2.5m A Max, 1m A Typ
Temperature drift of offset, linearity and full-scale error
LI NE AR IT ER RO (L SB • V RE F)
are all extremely low (1ppm/°C typically) allowing all 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.
TYPICAL APPLICATION
1.25 VCC = 5V
MPU 0.75
CS P1.4
(VREF) 0.50
ANALOG INPUT #1
CH0 CLK P1.3
0V TO 5V RANGE
LTC1091
ANALOG INPUT #2
CH1 DOUT P1.2 0.25
0V TO 5V RANGE
SERIAL DATA LINK 1091 TA01
GND DIN
FOR 8051 CODE SEE APPLICATIONS INFORMATION SECTION
REFERENCE VOLTAGE (V)
1091 TA02
Page Summary Contents For LINEAR TECHNOLOGY LTC1091 LTC1092 LTC1093 LTC1094 User Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 32 |
| File Size | 276.85 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What is the maximum resolution and typical error for these data acquisition systems?
The devices offer a 10-bit resolution, with a total unadjusted error of -1 LSB (A Grade) or -2 LSB for less critical applications.
Can the device operate directly from external sensors without complex circuitry?
Yes, because of the high impedance analog inputs and ability to Sample-and-Hold, it allows direct connection to sensors in many applications, eliminating the need for gain stages.
What is the typical maximum operating temperature range?
The LTC1091/2/3/4 devices operate from -40°C to 85°C. The analog reference and storage temperatures are wider, ranging from -65°C to 150°C.
How much current do these channels consume at typical operating points?
For the LTC1091 (A Grade), the maximum supply current is 3.5mA (typical: 1.5mA). For LTC1092/LTC1093/LTC1094, it is 2.5mA Max (typical: 1mA).
Are there options for differential or bipolar measurements?
Yes, the circuits can accommodate both Unipolar/Bipolar Conversions and Differential/Single-Ended Multiplexer configurations.