LINEAR TECHNOLOGY LTC1293, LTC1294, LTC1296 - Single Chip 12-Bit Data Acquisition System
Summary
The LTC1293/LTC1294/LTC1296 is a high-accuracy 12-bit data acquisition system designed for reliable conversion of both unipolar and bipolar analog signals to digital format. This advanced chip family features successive approximation A/D converters, built-in sample and hold functions, and supports single or differential inputs across multiple channels. Engineered for applications requiring low power consumption, it provides robust serial I/O communication with microprocessors. Ideal for electrical engineers and embedded systems developers, the module enables precise measurements from sources like strain gauges while maintaining a compact and straightforward interface.
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LTC1293/LTC1294/LTC1296 Single Chip 12-Bit Data Acquisition System
ESCRIPTIOSFEATURE
Software Programmable Features
The LTC1293/4/6 is a family of data acquisition systems
Unipolar/Bipolar Conversion
which contain a serial I/O successive approximation A/D
Differential/Single Ended Inputs
converter. It uses LTCMOSTM switched capacitor technol-
MSB-First or MSB/LSB Data Sequence
ogy to perform either 12-bit unipolar, or 11-bit plus sign
Power Shutdown
bipolar A/D conversions. The input multiplexer can be
Built-In Sample and Hold
configured for either single ended or differential inputs (or
Single Supply 5V or ±5V Operation
combinations thereof). An on-chip sample and hold is
Direct 4-Wire Interface to Most MPU Serial
included for all single ended input channels. When the
Ports and All MPU Parallel Ports
LTC1293/4/6 is idle it can be powered down in applica-
46.5k Hz Maximum Throughput Rate
tions where low power consumption is desired. The
System Shutdown Output (LTC1296)
LTC1296 includes a System Shutdown Output pin which can be used to power down external circuitry, such as signal conditioning circuitry prior to the input mux.
KEY SPECIFICATIO S
The serial I/O is designed to communicate without external
Resolution: 12 Bits hardware to most MPU serial ports and all MPU parallel Fast Conversion Time: 12µs Max Over Temp I/O ports allowing up to eight channels of data to be
Low Supply Current: 6.0m A transmitted over as few as three wires. LTCMOSTM is a trademark of Linear Technology Corporation
PPLICATITYPICAL
12-Bit Data Acquisition System with Power Shutdown
RB 5.1k
R2 74HC04
1.2M CH0 VCC +5V
R1 1/4 LT1014 CH1 SSO 47µF 10k
CH2 CLK
CH3 CS
350Ω STRAIN MPU GAUGE BRIDGE CH4 DOUT
LTC1296 1N4148
CH5 DIN
C2 CH6 REF+
CH7 REF–
COM AGND
DGND V–THREE ADDITIONAL STRAIN GAUGE INPUTS
CAN BE ACCOMMODATED USING THE OTHER AMPLIFIERS IN THE LT1014 LTC1293 TA01
129346fs
Page Summary Contents For LINEAR TECHNOLOGY LTC1293, LTC1294, LTC1296 - Single Chip 12-Bit Data Acquisition System
Manual Details
| Brand | Linear |
|---|---|
| Pages | 28 |
| File Size | 383.89 KB |
| Published | June 21, 2026 |
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Frequently Asked Questions
What are the operating temperature limits for different parts?
The LTC1293/4/6BC, CC, and DC can operate from 0°C to 70°C, while the -LTC1296 series (BI, CI, DI) offers wider range of –40°C to 85°C.
How does the LTC1296 power down external systems?
The LTC1296 includes a System Shutdown Output pin which can be used to power down external circuitry like signal conditioning prior to the input multiplexer.
What are the data acquisition system specifications?
It offers 12-bit resolution, up to 46.5kHz maximum throughput rate, and operates with low supply current.
Does the device support multiple types of inputs?
Yes, it supports both unipolar/bipolar conversion (12-bit unipolar or 11-bit plus sign bipolar) and can accommodate additional strain gauge inputs using other amplifiers like the LT1014.