LC2MOS
16-Bit Voltage Output DAC
AD7846 Data Sheet
FEATURES FUNCTIONAL BLOCK DIAGRAM 16-bit monotonicity over temperature
±2 LSBs integral linearity error
Microprocessor compatible with readback capability
Unipolar or bipolar output
Multiplying capability
Low power (100 mW typical) VREF+ 7 4 R A2 6 RIN R 16
SEGMENT
SWITCH
MATRIX 5 VOUT A3
12-BIT DAC R
VREF– VDD 21 AD7846 R R VCC 12 A1 23 CS 8 DAC LATCH
4 CONTROL
LOGIC 12 22 R/W
25 LDAC I/O LATCH 9 10 VSS 3 DB15 DB0 20 DGND 08490-001 24 CLR Figure 1. GENERAL DESCRIPTION
The AD7846 is a 16-bit DAC constructed with the Analog Devices,
Inc., LC2MOS process. It has VREF+ and VREF− reference inputs
and an on-chip output amplifier. These can be configured to
give a unipolar output range (0 V to +5 V, 0 V to +10 V) or
bipolar output ranges (±5 V, ±10 V).
The DAC uses a segmented architecture. The four MSBs in the …