ICmic
IC MICROSYSTEMS
ICM7377B/7357B/7337B
Quad 12/10/8-Bit Voltage Output DACs
with Serial Interface and Adjustable Output Gain
FEATURES
•
12/10/8-Bit Monotonic Quad DAC in 20 Lead
QSOP Package
•
Adjustable Output Gain
•
Wide Output Voltage Swing
•
150 µA per DAC at 5V Supply
•
100 µA per DAC at 3V Supply
•
On Board Reference
•
Serial Interface with three-wire SPI/QSPI and
Microwire Interface Compatible
•
Serial Data Out for Daisy-Chaining
•
8 µS Full scale Settling Time
APPLICATION
•
Battery-Powered Applications
•
Industrial Process Control
•
Digital Gain and Offset Adjustment
OVERVIEW
The ICM7377B, ICM7357B and ICM7337B are Quad 12-
Bit, 10-Bit and 8-Bit wide output voltage swing DACs
respectively, with guaranteed monotonic behavior. These
DACs are available in 20 Lead QSOP package. They
include adjustable output gain for ease of use and
flexibility. The reference output is available on a separate
pin and can be used to drive external loads. The operating
supply range is 2.7V to 5.5V.
The input interface is an easy to use three-wire SPI/QSPI
and Microwire compatible interface. The DAC has a
double buffered digital input. And there is a serial data
output port to allow daisy-chaining applications.
BLOCK DIAGRAM
REFCD
REFAB
ICM7377B/7357B/7337B
INPUT AND DAC LATCH
DAC A
+
-
INPUT AND DAC LATCH
DAC B
VOA
FBA
+
-
INPUT AND DAC LATCH
DAC C
VOB
FBB
+
-
INPUT AND DAC LATCH
DAC D
VOC
FBC
+
-
VOD
FBD
REFERENCE
REFOUT
INPUT CONTROL LOGIC, REGISTERS AND LATCHES
SDO
SDI
SCK
CS
CLR
Rev. A8
ICmic reserves the right to change the specifications without prior notice.
1