1FEATURES
2· 40-kHz Min Sampling Rate
· 4-V, 5-V, and ±10-V Input Ranges
· 73.9-dB SINAD with 10-kHz Input
· ±0.45 LSB Max INL
· ±0.45 LSB Max DNL, 12-Bit No Missing Codes
· ±5-mV BPZ, ±0.5 PPM/°C BPZ Drift
· SPI Compatible Serial Output With
Daisy-Chain (TAG), SPI Master/Slave Feature
· Single 5-V Analog Supply
· Pin-Compatible With ADS7806 and 16-Bit
ADS7807/8507
· Uses Internal or External 2.5-V Reference
· Low Power Dissipation
– 24 mW Typ, 30 mW Max at 40 KSPS
· 50-mW Max Power Down Mode
· 28-Pin SO Package
· Full Parallel Interface
· 2's Comp or BTC Output Code

APPLICATIONS
· Industrial Process Control
· Test Equipment
· Medical Equipment
· Data Acquisition Systems
· Digital Signal Processing
· Instrumentation

DESCRIPTION
The ADS8506 is a complete low power, single 5-V supply, 12-bit sampling analog-to-digital (A/D)
converter. It contains a complete 12-bit
capacitor-based, successive approximation register
(SAR) A/D converter with sample and hold, clock,
reference, and data interface. The converter can be configured for a variety of input ranges including ±10
V, 4 V, and 5 V. For most input ranges, the input
voltage can swing to 25 V or –25 V without damage
to the converter.
A SPI compatible serial interface allows data to be
synchronized to an internal or external clock. A full parallel interface with BYTE select is also provided to
allow the maximum system design flexibility. The
ADS8506 is specified at 40 kHz sampling rate over
the industrial -40°C to 85°C temperature range.