The MAX5170/MAX5172 low-power, serial, voltage-output, 14-bit digital-to-analog converters (DACs) feature a precision output amplifier in a space-saving 16-pin QSOP package. The MAX5170 operates from a +5V single supply and the MAX5172 operates from a +3V single supply. Both devices draw only 280µA of supply current, which reduces to 1µA in shutdown. In addition, the programmable power-up reset feature allows for a user-selectable power-up 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 shutdown, shutdown lockout, a hardware clear pin, and a reference 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 triggers to allow direct interfacing to optocouplers.
The MAX5170/MAX5172 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) temperature range. For 100% pin-compatible Dacs with internal reference, see the 13-bit MAX5130/MAX5131 and the 12-bit MAX5120/MAX5121 data sheets.
关键特性
应用/使用
±1 LSB INL
1µA Shutdown Current
"Glitch Free" Output Voltage at Power-Up
Single-Supply Operation
+5V (MAX5170)
+3V (MAX5172)
Full-Scale Output Range
+2.048V (MAX5172, VREF = +1.25V)
+4.096V (MAX5170, VREF = +2.5V )
Rail-to-Rail Output Amplifier
Adjustable Output Offset
Low THD (-80dB) in Multiplying Operation
SPI/QSPI/MICROWIRE-Compatible 3-Wire
Serial Interface
Programmable Shutdown Mode and Power-Up Reset (0 or Midscale)
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 MAX5174/MAX5176
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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