MAX5222 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23

19-1720; Rev 0; 4/00
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
General Description
The MAX5222 contains two 8-bit, buffered, voltage-out-
put digital-to-analog converters (DAC A and DAC B) in a
small 8-pin SOT23 package. Both DAC outputs can
source and sink 1mA to within 100mV of ground and
V_DD. The MAX5222 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 MAX5222’s ultra-low power consumption and tiny
8-pin SOT23 package make it ideal for portable and
battery-powered applications. Supply current is less
than 1mA and drops below 1µA in shutdown mode. In
addition, the reference input is disconnected from the
REF pin during shutdown, further reducing the system’s
total power consumption.
Features
o Operates from a Single +2.7V to +5.5V Supply
o Tiny 8-Pin SOT23 Package (3mm ✕ 3mm)
o Dual Buffered Voltage Output
o Low Power Consumption
0.4mA Operating Current
<1µA Shutdown Current
o Programmable Shutdown Mode
o 25MHz, 3-Wire Serial Interface
o SPI, QSPI, and MICROWIRE Compatible
PART
MAX5222EKA-T
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 SOT23-8
________________________Applications
Digital Gain and Offset Adjustment
Programmable Current Source
Programmable Voltage Source
Power-Amp Bias Control
VCO Tuning
Pin Configuration
TOP VIEW
CS 1
GND ²
V_DD ³
SCLK ⁴
MAX5222
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
MAX5222
2 GND
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone [phone].
For small orders, phone [phone].