LTC1662

Features:

Ultralow Power: 1.5m A (Typ) ICC per DAC Plus 0.05m A Sleep Mode for Extended Battery Life Tiny: Two 10-Bit DACs in an 8-Lead MSOPHalf the Size of an SO8
Wide 2.7V to 5.5V Supply Range Double Buffered for Simultaneous DAC Updates Rail-to-Rail Voltage Outputs Drive 1000pF Reference Range Includes Supply for Ratiometric 0V-to-V_CC  Output Reference Input Impedance Is Code-Independent (7.1MW  Typ)-Eliminates External Buffers 3-Wire Serial Interface with
Schmitt Trigger Inputs Differential Nonlinearity: 0.75LSB Max


Application

Mobile Communications Portable Battery-Powered Instruments Remote Industrial Devices Digitally Controlled Amplifiers and Attenuators Automatic Calibration for Manufacturing


Pinout




Specifications

(Note 1)
V_CC  to GND............................................... 0.3V to 7.5V
Logic Inputs to GND................................... 0.3V to 7.5V
V_OUT^A , V_{OUT B}   , REF to GND............0.3V to (V  + 0.3V)
 Maximum Junction Temperature............................. 125 C
Storage Temperature Range................... 65 C to 150 C
Operating Temperature Range
  LTC1662C ...................................................  0 C to 70 C
  LTC1662I................................................. 40 C to 85 C
Lead Temperature (Soldering, 10 sec)...................  300 C


Description

The LTC^(R)  1662 is an ultralow power, fully buffered voltage output, dual 10-bit digital-to-analog converter (DAC). Each DAC draws just 1.7m A (typ) total supply-plus-reference operating current, yet is capable of supplying DC output currents in excess of 1mA and reliably driving capacitive loads of up to 1000pF. A programmable Sleep mode further reduces total operating current to a negli- gible 0.05m A.

Linear Technology's proprietary, inherently monotonic voltage interpolation architecture provides excellent lin-earity while allowing for an exceptionally small external form factor. The double-buffered input logic provides simultaneous update capability and can be used to write to either DAC without interrupting Sleep mode.

With its ultralow operating current and exceptionally small size, the LTC1662 is ideal for use in battery- powered products.

The LTC1662 is pin- and software-compatible with the LTC1661 micropower dual 10-bit DAC. It is available in 8-pin MSOP and PDIP packages and is specified over the industrial temperature range.