General Description
The MAX5171/MAX5173 low-power, serial, voltage-output,
14-bit digital-to-analog converters (DACs) feature a preci-
sion output amplifier in a space-saving 16-pin QSOP
package. The MAX5171 operates from a +5V single sup-
ply, and the MAX5173 operates from a +3V single supply.
The output amplifier’s inverting input is available to allow
specific gain configurations, remote sensing, and high
output current capability. This makes the MAX5171/
MAX5173 ideal for a wide range of applications, including
industrial process control. Both devices draw only 260µA
of supply current, which reduces to 1µA in shutdown
mode. In addition, the programmable power-up reset fea-
ture allows for a user-selectable output voltage of either 0
or midscale.
The 3-wire serial interface is compatible with SPI™,
QSPI™, and MICROWIRE™ standards. An input register
followed by a DAC register provides a double-buffered
input, allowing the input and DAC registers to be updated
independently or simultaneously with a 16-bit serial word.
Additional features include software and hardware shut-
down, shutdown lockout, a hardware clear pin, and a ref-
erence input capable of accepting DC and offset AC
signals. These devices provide a programmable digital
output pin for added functionality and a serial-data output
pin for daisy-chaining. All logic inputs are TTL/CMOS-
compatible and are internally buffered with Schmitt trig-
gers to allow direct interfacing to optocouplers.
The MAX5171/MAX5173 incorporate a proprietary on-chip
circuit that keeps the output voltage virtually “glitch free,”
limiting the glitches to a few millivolts during power-up.
Both devices are available in 16-pin QSOP packages and
are specified for the extended (-40°C to +85°C) tempera-
ture range. The MAX5171/MAX5173 are pin-compatible
upgrades to the 12-bit MAX5175/MAX5177. For 100% pin-
compatible DACs with an internal reference, see the 13-bit
MAX5132/MAX5133 and the 12-bit MAX5122/MAX5123
data sheets.
Applications
Features
♦ ±1 LSB INL
♦ 1µA Shutdown Current
♦ “Glitch Free” Output Voltage at Power-Up
♦ Single-Supply Operation: +5V (MAX5171)
+3V (MAX5173)
♦ Full-Scale Output Range:
+2.048V (MAX5173, V
REF
= +1.25V)
+4.096V (MAX5171, V
REF
= +2.5V )
♦ Rail-to-Rail
®
Output Amplifier
♦ Low THD (-80dB) in Multiplying Operation
♦ SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
♦ Programmable Shutdown Mode and Power-Up
Reset
♦ Buffered Output Capable of Driving 5kΩ || 100pF
Loads
♦ User-Programmable Digital Output Pin Allows
Serial Control of External Components
♦ Pin-Compatible Upgrade to the 12-Bit
MAX5175/MAX5177
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX5171/MAX5173
Low-Power, Serial, 14-Bit DACs
with Force/Sense Voltage Output
________________________________________________________________
Maxim Integrated Products
1
19-1476; Rev 0; 4/99
Pin Configuration
Functional Diagram appears at end of data sheet.
