Features
• 12-bit SAR architecture
• 1 Msps conversion rate
• 8-to-1-channel input MUX
• 3.3 V operating supply
• SPI, serial digital output
• Power-down function
• Nickel/palladium/gold-lead-finished (NiPdAu), whisker-free
• Gold-wires
• RML <1% and CVCM <0.1% guaranteed outgassing
• 50 krad (Si) total ionizing dose
• SEL-free up to 62.5 MeV.cm²/mg
• Mass: 80 mg
• Compliant with ST-LEO-specification

Description
The LEOAD128 is a low power, multiplexed 8-input pure CMOS 12-bit analog-todigital
converter specified for conversion from 50 ksps to 1 Msps. The architecture
is based on a successive-approximation register with internal track-and-hold. The
output serial data is straight binary and is compatible with SPI™.
The analog and digital power supplies operate from 2.7 V to 3.6 V, drawing a current
consumption of only 2 mA maximum.
The LEOAD128 can operate over a large temperature range of -40 °C to +125
°C and it is housed in plastic TSSOP-20, thin-shrink small outline package, 20
leads, using golden bonding and nickel/palladium/golden-lead-finishing to prevent
from whiskers.
The LEOAD128 is compliant with the ST-LEO-specification, dedicated specification
for space-ready rad-hard plastic products. This AEC-Q100-based specification offers
a specific trade-off among footprint size savings, cost of ownership and quality
assurance together with radiation hardness and large quantity capability.

Application
• Low earth orbit (LEO) applications, telemetry, housekeeping