1
dc2025afa
DEMO MANUAL DC2025A
DESCRIPTION
16-Channel 16-Bit/12-Bit
±10V V
OUT
SoftSpan DACs with
10ppm/°C Max Reference
Demonstration circuit 2025A features the
,
16-channel 16-Bit/12-Bit ±10V V
OUT
SoftSpan™ DACs with
10ppm/°C max reference in a 6mm × 6mm QFN package.
This device features per-channel SoftSpan configuration
with five output ranges: 0V to 5V, 0V to 10V, ±2.5V, ±5V,
and ±10V. A toggle feature allows any or all DACs to switch
between two programmed codes via a single SPI command
or by the TGP input pin. The versatile SPI interface can
operate on any logic level between 1.71V and 5.5V, for
easy interface to lower voltage microcontrollers or FPGAs.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
SoftSpan and QuikEval are trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners.
DC2025A-A is populated with the 16-bit version of the
LTC2668. DC2025A-B is populated with the 12-bit version
for lower resolution applications.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2025A
Figure 1. Connection Diagram
SIGNAL
GROUND
MEASURE REF VOLTAGE,
MUX OUTPUT
SIGNAL
GROUND
DAC
OUTPUTS
+–
+–
DAC
OUTPUTS
OVERTEMPERATURE
OUTPUT
SEE TEXT.
LDAC
, TGP,
CLR
PULLED TO OVP W/5kΩ
DAC
OUTPUTS
ANALOG SUPPLIES
(±15V ALLOWS ALL
SOFTSPAN RANGES)
