LINEAR TECHNOLOGY LTC1286 LTC1298 User's Manual
Summary
These micropower 12-bit A/D converters are designed for high-precision data acquisition in varied environments. Ideal for battery monitoring, remote sensing, or medical applications, they utilize low power consumption (down to 1nA standby) and feature options like differential inputs and multi-channel multiplexing. The accompanying manual provides detailed technical specifications, operating parameters, and application guidelines necessary for engineers building reliable, low-maintenance data logging systems.
Page 1 Text Content
LTC1286/LTC1298 Micropower Sampling 12-Bit A/D Converters In S0-8 Packages
FEATURES DESCRIPTION 12-Bit Resolution The LTC1286/LTC1298 are micropower, 12-bit, succes- 8-Pin SOIC Plastic Package sive approximation sampling A/D converters. They typi- Low Cost cally draw only 250µA of supply current when converting Low Supply Current: 250µA Typ. and automatically power down to a typical supply current Auto Shutdown to 1n A Typ. of 1n A whenever they are not performing conversions. Guaranteed ±3/4LSB Max DNL They are packaged in 8-pin SO packages and operate on Single Supply 5V to 9V Operation 5V to 9V supplies. These 12-bit, switched-capacitor, suc- On-Chip Sample-and-Hold cessive approximation ADCs include sample-and-holds. 60µs Conversion Time The LTC1286 has a single differential analog input. The Sampling Rates: LTC1298 offers a software selectable 2-channel MUX.
12.5 ksps (LTC1286)
On-chip serial ports allow efficient data transfer to a wide
11.1 ksps (LTC1298)
range of microprocessors and microcontrollers over three
I/O Compatible with SPI, Microwire, etc.
wires. This, coupled with micropower consumption, makes
Differential Inputs (LTC1286)
remote location possible and facilitates transmitting data
SU PP LY UR RE NT (µ A)
2-Channel MUX (LTC1298)
through isolation barriers.
3V Versions Available: LTC1285/LTC1288
These circuits can be used in ratiometric applications or
APPLICATIONS with an external reference. The high impedance analog
inputs and the ability to operate with reduced spans (to
Battery-Operated Systems
1.5V full scale) allow direct connection to sensors and
Remote Data Acquisition
transducers in many applications, eliminating the need for
Battery Monitoring
gain stages.
Handheld Terminal Interface Temperature Measurement Isolated Data Acquisition
TYPICAL APPLICATIONS N 25µW, S0-8 Package, 12-Bit ADC Supply Current vs Sample Rate Samples at 200Hz and Runs Off a 5V Supply
TA = 25°C VCC = VREF = 5V
f CLK = 200k Hz
MPU (e.g., 8051)
VREF VCC P1.4
ANALOG INPUT +IN LTC1286 CLK P1.3 0V TO 5V RANGE –IN DOUT P1.2
SERIAL DATA LINK
GND CS/SHDN
LTC1286/98 • TA01
0.1k 1k 10k 100k SAMPLE FREQUENCY (Hz)
LTC1286/98 • TA02
Page Summary Contents For LINEAR TECHNOLOGY LTC1286 LTC1298 User's Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 24 |
| File Size | 286.88 KB |
| Published | June 02, 2026 |
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Frequently Asked Questions
What is the maximum sampling rate available?
The LTC1298 offers a software selectable range up to 11.1 ksamples per second (ksps).
Is battery power compatible with this unit?
Yes, it can operate down to a full scale of 1.5V, making connection to sensors and transducers possible without extra battery monitoring stages.
How does the LTC1286 handle analog inputs?
It has a single differential analog input that allows for remote data acquisition and uses its built-in sample-and-hold circuit.
What is the operational temperature range for all components?
The Analog and Reference components operate from 0°C to 70°C, while the Digital Inputs are rated for -40°C to 85°C.