Rainbow Electronics MAX5661 - Manual

General Description
The MAX5661 single 16-bit DAC with precision high-
voltage amplifiers provides a complete solution for pro-
grammable current and voltage-output applications.
The output amplifiers swing to industry-standard levels
of ±10V (voltage output) or source from 0mA (or from
4mA) to 20mA (current output). The voltage output
(OUTV) drives resistive loads greater than 2kΩ and
capacitive loads of up to 1.2µF. Voltage-output force-
sense connections compensate for series protection
resistors and field-wiring resistance. Short-circuit pro-
tection on the voltage output limits output current to
10mA (typ) sourcing or -11.5mA (typ) sinking. The cur-
rent output (OUTI) drives resistive loads up to 37.5V
(max) and inductive loads up to 1H.
The MAX5661 provides either a current output or a volt-
age output. Only one output is active at any given time,
regardless of the configuration. The MAX5661 voltage
output operates with ±13.48V to ±15.75V supplies
(V
DDV , V SSV ) and the current output operates with a
single +13.48V to +40V supply (V DDI ). A +4.75V to
+5.25V digital supply (V
CC
) powers the rest of the inter-
nal circuitry. A buffered reference input accepts an
external +4.096V reference voltage.
Update the DAC outputs using software commands or
the asynchronous LDAC input. An asynchronous CLR
input sets the DAC outputs to the value stored in the
clear register or to zero. The FAULT output asserts
when the DAC’s current output is an open circuit, the
DAC’s voltage output is a short circuit, or when the CLR
input is low.
The MAX5661 communicates through a 4-wire 10MHz
SPI™-/QSPI™-/MICROWIRE™-compatible serial inter-
face. The DOUT output allows daisy chaining of multi-
ple devices. The MAX5661 is available in a 10mm x
10mm, 64-pin, LQFP package and operates over the
-40°C to +105°C temperature range.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Applications
Industrial Analog Output Modules
Industrial Instrumentation
Programmable Logic Controls/Distributed
Control Systems
Process Control
Features
♦ 10-Bit Programmable Full-Scale Output
Adjustment for Up to ±25% Over Range
♦ Programmable Voltage Output
Unipolar Range: 0 to +10.24V ±25%
Bipolar Range: ±10.24V ±25%
♦ Programmable Current Output
Unipolar Low Range: 0 to 20.45mA
Unipolar High Range: 3.97mA to 20.45mA
♦ Flexible Analog Supplies (See Table 16)
±13.48V to ±15.75V for Voltage Output
+13.48V to +40V for Current Output
♦ Force-Sense Connections (Voltage Output)
for Differential Voltage-Output Remote Sensing
♦ Voltage-Output Current Limit
♦ Dropout Detector Senses Out-of-Regulation
Current Output
♦ CLR and LDAC Inputs for Asynchronous DAC
Updates
♦ CLR Input Resets Output to Programmed Value or
Zero Code
♦ FAULT Output Indicates Open-Circuited Current
Output, Short-Circuited Voltage Output, or Clear
State
♦ Temperature Drift
Voltage Output: ±0.4ppm FSR/°C
Current Output: ±7.9ppm FSR/°C
♦ Small 64-Pin LQFP Package (10mm x 10mm)
MAX5661
19-0741; Rev 0; 8/08
Single 16-Bit DAC with Current and Voltage
Outputs for Industrial Analog Output Modules
Pin Configuration and Typical Operating Circuit appear at
end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
+ Denotes a lead-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX5661GCB+ -40°C to +105°C 64 LQFP