MAX5223 Datasheet, PDF (1/11 Pages) Maxim Integrated Products – Low - Power, Dual, 8 - Bit, Voltage Output Serial DAC in 8 - Pin SOT23

19-1895; Rev 0; 1/01
Low-Power, Dual, 8-Bit, Voltage Output
Serial DAC in 8-Pin SOT23
General Description
The MAX5223 contains two 8-bit, buffered, voltage out-
put digital-to-analog converters (DAC A and DAC B) in a
small 8-pin SOT23 package. DAC outputs can source
and sink 1mA to within 100mV of ground and V_DD. The
MAX5223 operates with a single +2.7V to +5.5V supply.
The device uses a 3-wire serial interface, which oper-
ates at clock rates up to 25MHz and is compatible with
SPI™, QSPI™, and MICROWIRE™ interface standards.
The serial input shift register is 16 bits long and con-
sists of 8 bits of DAC input data and 8 bits for DAC
selection and shutdown control. DAC registers can be
loaded independently or in parallel at the positive edge
of CS.
The MAX5223’s ultra-low power consumption and tiny
8-pin SOT23 package make it ideal for portable and
battery-powered applications. Supply current is a low
100µA and drops below 1µA in shutdown mode. In
addition, the reference input is disconnected from the
REF pin during shutdown, which reduces the system’s
total power consumption.
Features
o Tiny 8-Pin SOT23 Package (3mm ✕ 3mm)
o Low Power Consumption
100µA Operating Current
<1µA Shutdown Current
o +2.7V to +5.5V Single-Supply Operation
o Dual Buffered Voltage Output
o Programmable Shutdown Mode
o 25MHz, 3-Wire Serial Interface
o SPI, QSPI, and MICROWIRE-Compatible
PART
MAX5223EKA-T
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 SOT23
________________________Applications
Digital Gain and Offset Adjustment
Programmable Current Source
Programmable Voltage Source
Power Amp Bias Control
VCO Tuning
TOP VIEW
Pin Configuration
CS 1
GND ²
V_DD ³
SCLK ⁴
MAX5223
8 _DIN
7 REF
6 OUTB
5 OUTA
SOT23-8
Functional Diagram
SCLK
4
CS
1
0.22µF
8 DIN
3 ^VDD 7 REF
0.1µF
(OPTIONAL)
DAC
LATCH
A
DAC A
DAC
LATCH
B
DAC B
OUTA V_OUTA
5
OUTB V_OUTB
6
MAX5223
2 GND
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
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