GENERAL DESCRIPTION
The AD420 is a complete digital to current loop output converter, designed to meet the needs of the industrial control market. It provides a high precision, fully integrated, low cost single-chip solution for generating current loop signals in a compact 24-lead SOIC or PDIP package.
   
FEATURES
    4 mA–20 mA, 0 mA–20 mA or 0 mA–24 mA
        current output
    16-bit resolution and monotonicity
    ±0.012% max integral nonlinearity
    ±0.05% max offset (trimmable)
    ±0.15% max total output error (trimmable)
    Flexible serial digital interface (3.3 MBPS)
    On-Chip loop fault detection
    On-chip 5 V reference (25 ppm/°C max)
    Asynchronous CLEAR function
    Maximum power supply range of 32 V
    Output loop compliance of 0 V to VCC − 2.75 V
    24-Lead SOIC and PDIP packages