MAX5322 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – ±10V, Dual, 12-Bit, Serial, Voltage-Output DAC

19-3150; Rev 2; 10/05
±10V, Dual, 12-Bit, Serial, Voltage-Output DAC
General Description
Features
The MAX5322 dual, 12-bit, serial-interface, digital-to-ana-
log converter (DAC) provides bipolar ±5V to ±10V out-
puts from ±12V to ±15V analog power-supply voltages, or
unipolar 5V to 10V outputs from a single 12V to 15V ana-
log power-supply voltage.
The MAX5322 features excellent linearity with both inte-
gral nonlinearity (INL) and differential nonlinearity (DNL)
guaranteed to ±1 LSB (max). The device also features a
fast 10µs to 0.5 LSB settling time, and a hardware-shut-
down feature that reduces current consumption to 2.8µA.
The output goes to midscale at power-up in bipolar
mode (0V), and to zero scale at power-up in unipolar
mode (0V). A clear input (CLR) asynchronously clears
the DAC register and sets the outputs to 0V. The outputs
can be asynchronously updated with the load DAC
(LDAC) input.
The device features a fast 10MHz SPI™-/QSPI™-
/MICROWIRE™-compatible serial interface that operates
with 3V or 5V logic. Additional features include a serial-
data output (DOUT) for daisy chaining and read-back
functions. The MAX5322 requires external reference volt-
ages of 2V to 5.25V and is available in a 28-pin SSOP
package that operates over the extended (-40°C to
+85°C) temperature range.
♦ Unipolar or Bipolar Output-Voltage Ranges
Unipolar: 0 to +2 x V_REF (Single or Dual Supply)
Bipolar: -2 x V_REF to +2 x V_REF (Dual Supply)
♦ Guaranteed INL ≤ ±1 LSB (max)
♦ Guaranteed Monotonic: DNL ≤ ±1 LSB (max)
♦ 10µs Settling Time to 0.5 LSB
♦ Low 2.8µA Shutdown Current
♦ Fast 10MHz SPI-/QSPI-/MICROWIRE-Compatible
Serial Interface
♦ Power-On Reset Sets DAC Output to 0V
♦ Schmitt Trigger Inputs for Direct
Optocoupler Interface
♦ Serial-Data Output Allows Daisy-Chaining
of Devices
♦ 28-Pin SSOP (8mm x 10mm)
Applications
Ordering Information
Motor Control
Industrial Process
Controls
Automatic Test
Equipment (ATE)
Analog I/O Boards
PART
MAX5322EAI
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
28 SSOP
Industrial Automation
Data-Acquisition Systems
Functional Diagram
2R
2R
REFA
LDAC
CLR
12-BIT
DAC A
12
SW2
SW1
A1
SW3
INPUT
DAC
REGISTERS
REGISTERS
12
12 12
REFB
12-BIT
DAC B
DIN
16-BIT SHIFT REGISTER
SW6
SW4
SW5
A3
SCLK
CS
UNI/BIPA
UNI/BIPB
SHDN
SERIAL INTERFACE
AND CONTROL
2R
2R
DOUT
VCC
DGND
DIGITAL
POWER
MAX5322
A2
OUTA
2R
2R
SGNDA
A4
OUTB
2R
ANALOG
POWER
2R
SGNDB
VSS
VDD
AGND
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.