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MAX5223 Datasheet

  • MAX5223

  • " Low-Power, Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin...

  • Maxim   Maxim

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19-1895; Rev 0; 1/01
Low-Power, Dual, 8-Bit, Voltage Output
Serial DAC in 8-Pin SOT23
MAX5223
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鈩? QSPI鈩? and MICROWIRE鈩?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鈥檚 ultra-low power consumption and tiny
8-pin SOT23 package make it ideal for portable and
battery-powered applications. Supply current is a low
100碌A(chǔ) and drops below 1碌A(chǔ) in shutdown mode. In
addition, the reference input is disconnected from the
REF pin during shutdown, which reduces the system鈥檚
total power consumption.
o
Low Power Consumption
100碌A(chǔ) Operating Current
<1碌A(chǔ) 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
Features
o
Tiny 8-Pin SOT23 Package (3mm
鉁?/div>
3mm)
Ordering Information
PART
MAX5223EKA-T
TEMP. RANGE
-40擄C to +85擄C
PIN-PACKAGE
8 SOT23
________________________Applications
Digital Gain and Offset Adjustment
Programmable Current Source
Programmable Voltage Source
Power Amp Bias Control
VCO Tuning
8 DIN
SCLK
4
0.22碌F
Functional Diagram
0.1碌F
(OPTIONAL)
3 V
DD
7 REF
OUTA V
OUTA
DAC
LATCH
A
DAC A
5
Pin Configuration
TOP VIEW
16-BIT SHIFT REGISTER
CONTROL (8)
DATA (8)
DAC
LATCH
B
DAC B
OUTB V
OUTB
6
CS 1
GND 2
V
DD
3
SCLK 4
8
DIN
REF
OUTB
OUTA
MAX5223
7
6
5
CS
1
MAX5223
SOT23-8
2 GND
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim鈥檚 website at www.maxim-ic.com.

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