Features

• 80μA Maximum Supply Current
• 1nA Typical Supply Current in Shutdown
• 5V Operation (LTC1096/LTC1098)
• 3V Operation (LTC1096L/LTC1098L)(2.65V Min)
• Sample-and-Hold
• 16μs Conversion Time
• 33kHz Sample Rate
• ±0.5LSB Total Unadjusted Error Over Temp
• Direct 3-Wire Interface to Most MPU Serial Ports and All MPU Parallel I/O Ports
• 8-Pin SO Plastic Package

Typical Application

Description

The LTC1096/LTC1096L/LTC1098/LTC1098L are micropower, 8-bit A/D converters that draw only 80μA of supply current when converting. They automatically power down to 1nA typical supply current whenever they are not performing conversions. They are packaged in 8-pin SO packages and have both 3V (L) and 5V versions. These 8-bit, switched-capacitor, successive approximation ADCs include sample-and-hold. The LTC1096/LTC1096L have a single differential analog input. The LTC1098/LTC1098L offer a software selectable 2-channel MUX.

On-chip serial ports allow efficient data transfer to a wide range of microprocessors and microcontrollers over three wires. This, coupled with micropower consumption, makes remote location possible and facilitates transmitting data through isolation barriers.

These circuits can be used in ratiometric applications or with an external reference. The high impedance analog inputs and the ability to operate with reduced spans (be- low 1V full scale) allow direct connection to sensors and transducers in many applications, eliminating the need for gain stages.