LINEAR TECHNOLOGY LTC1594L LTC1598L 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O ADC Converters
Summary
The LTC1594L/LTC1598L are advanced 12-bit, micropower Analog-to-Digital Converters featuring automated multiplexing for 4- and 8-channel data acquisition. Designed to operate efficiently on a low 3V supply, these converters minimize power consumption in demanding environments. The manual serves as a comprehensive technical guide for engineers needing reliable, battery-operated sensing solutions, covering detailed electrical specifications, multiple serial I/O protocols (SPI, QSPI), and optimal implementation strategies for remote monitoring and data isolation.
Page 1 Text Content
LTC1594L/LTC1598L 4- and 8-Channel,
3V Micropower Sampling 12-Bit Serial I/O A/D Converters
FEATURES DESCRIPTIO 12-Bit Resolution on 3V Supply The LTC®1594L/LTC1598L are 3V micropower, 12-bit Low Supply Current: 160µA Typ sampling A/D converters that feature 4- and 8-channel Auto Shutdown to 1n A multiplexers, respectively. They typically draw only 160µA
Guaranteed ±3/4LSB Max DNL of supply current when converting and automatically Guaranteed 2.7V Operation power down to a typical supply current of 1n A between (5V Versions Available: LTC1594/LTC1598) conversions. The LTC1594L is available in a 16-pin SO Multiplexer: 4-Channel MUX (LTC1594L) package and the LTC1598L is packaged in a 24-pin 8-Channel MUX (LTC1598L) SSOP. Both operate on a 3V supply. The 12-bit, switched- Separate MUX Output and ADC Input Pins capacitor, successive approximation ADCs include a MUX and ADC May Be Controlled Separately sample-and-hold.
Sampling Rate: 10.5ksps
On-chip serial ports allow efficient data transfer to a wide
I/O Compatible with QSPI, SPI and MICROWIRETM, etc.
range of microprocessors and microcontrollers over three
Small Package: 16-Pin Narrow SO (LTC1594L)
or four wires. This, coupled with micropower consump-
24-Pin SSOP (LTC1598L)
tion, makes remote location possible and facilitates trans- APPLICATIO S mitting data through isolation barriers.
SU PP LY UR RE NT (µ A) The circuit can be used in ratiometric applications or with
Pen Screen Digitizing
an external reference. The high impedance analog inputs
Battery-Operated Systems
and the ability to operate with reduced spans (to 1.5V full
Remote Data Acquisition
scale) allow direct connection to sensors and transducers
Isolated Data Acquisition
in many applications, eliminating the need for gain stages.
Battery Monitoring
, LTC and LT are registered trademarks of Linear Technology Corporation.
Temperature Measurement MICROWIRE is a trademark of National Semiconductor Corporation.
TYPICAL APPLICATION 12µW, 8-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 3V Supply
OPTIONAL ADC FILTER
Supply Current vs Sample Rate
TA = 25°C VCC = 2.7V
1µF VREF = 2.5V
MUXOUT ADCIN VREF VCC
f CLK = 200k Hz
CH0 SERIAL DATA LINK
CH1 MICROWIRE AND
CSADC SPI COMPATABLE
CSMUX
ANALOG
CH3 12-BIT 5, 14 INPUTS 8-CHANNEL CLK
CH4 MUX SAMPLING MPU
0V TO 3V
ADC DIN
RANGE CH5
CH6 CH7
LTC1598L NC
COM NC
4, 9 1594L/98L TA01 SAMPLE FREQUENCY (k Hz)
1594L/98L TA02
15948lfb
Page Summary Contents For LINEAR TECHNOLOGY LTC1594L LTC1598L 4- and 8-Channel, 3V Micropower Sampling 12-Bit Serial I/O ADC Converters
Manual Details
| Brand | Linear |
|---|---|
| Pages | 24 |
| File Size | 354.44 KB |
| Published | June 05, 2026 |
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Frequently Asked Questions
What is the power consumption?
The converters typically draw only 160μA and can enter a low current state of 1nA.
How many channels are available in the LTC1598L?
The LTC1598L is an 8-Channel MUX configured for 12-Bit serial I/O.
What types of data interfaces are compatible with these converters?
They support QSPI, SPI, and MICROWIRE, facilitating efficient data transfer to microprocessors.
Does this system require external gain stages?
No, the high impedance analog inputs allow for direct connection to sensors, eliminating the need for gain stages.