The LTC1594L/LTC1598L are 3V micropower, 12-bit sampling A/D converters that feature 4- and 8-channel multiplexers, respectively. They typically draw only 160µA of supply current when converting and automatically power down to a typical supply current of 1nA between conversions. The LTC1594L is available in a 16-pin SO package and the LTC1598L is packaged in a 24-pin SSOP. Both operate on a 3V supply. The 12-bit, switched-capacitor, successive approximation ADCs include a sample-and-hold. On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three or four wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data through isolation barriers. The circuit can be used in ratiometric applications or with an external reference. The high impedance analog inputs and the ability to operate with reduced spans (to 1.5V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages.
The LTC1594L (4‑channel) and LTC1598L (8‑channel) are 3 V micropower, 12‑bit successive‑approximation A/D converters with on‑chip multiplexers. They draw only about 160 µA during conversion and can auto‑shutdown to 1 nA between samples, making them suitable for battery‑operated and remote‑data‑acquisition systems.
The document provides full electrical specifications, pin‑out tables, package dimensions, typical performance graphs, and example application circuits. It also lists related parts and recommended solder‑pad layouts for the 16‑lead SO and 24‑lead SSOP packages.
| Typical Supply Current | 160 µA |
|---|---|
| Auto‑Shutdown Current | 1 nA |
| Maximum Sampling Rate | 10.5 ksps |
| Supply Voltage Range | 2.7 V – 3.6 V |
| Package Types | 16‑lead SO (LTC1594L), 24‑lead SSOP (LTC1598L) |
The devices typically draw about 160 µA while converting and can auto‑shutdown to 1 nA between conversions.
They can sample at up to 10.5 ksps.
For the LTC1594L the reference input is on pin 6 (Veer); for the LTC1598L it is on pin 16 (Vrer).