DESCRIPTION
The LTC®1657L is a complete single supply, rail-to-rail voltage output, 16-bit digital-to-analog converter (DAC) in a 28-pin SSOP or PDIP package. It includes a rail-to-rail output buffer amplifier, an internal 1.25V reference and a double buffered parallel digital interface.
The LTC1657L operates from a 2.7V to 5.5V supply. It has a separate reference input pin that can be driven by an external reference. The full-scale output can be 1 or 2 times the reference voltage depending on how the X1/X2 pin is connected.
The LTC1657L is similar to Linear Technology Corporation’s LTC1450 12-bit VOUT DAC family allowing an easy up grade path. It is the only buffered 16-bit parallel DAC in a 28-lead SSOP package and includes an onboard reference for stand alone performance.

FEATURES
■ 16-Bit Monotonic Over Temperature
■ 3V Single Supply Operation
■ Deglitched Rail-to-Rail Voltage Output: 8nV • s
■ ICC: 650µA Typ
■ Maximum DNL Error: ±1LSB
■ Settling Time: 20µs to ±1LSB
■ Internal or External Reference
■ Internal Power-On Reset to 0V
■ Asynchronous CLR Pin
■ Output Buffer Configurable for Gain of 1 or 2
■ Parallel 16-Bit or 2-Byte Double Buffered Interface
■ Narrow 28-Lead SSOP Package
■ 5V Version Available (LTC1657)

APPLICATIOUNS
■ Instrumentation
■ Industrial Process Control
■ Automatic Test Equipment
■ Communication Test Equipment