Rainbow Electronics MAX5842 - Manual

General Description
The MAX5842 is a quad, 12-bit voltage-output, digital-
to-analog converter (DAC) with an I
2 C ™ -compatible,
2-wire interface that operates at clock rates up to
400kHz. The device operates from a single 2.7V to 5.5V
supply and draws only 230µA at V
DD = 3.6V. A power-
down mode decreases current consumption to less
than 1µA. The MAX5842 features three software-selec-
table power-down output impedances: 100k
Ω, 1kΩ,
and high impedance. Other features include internal
precision Rail-to-Rail
® output buffers and a power-on
reset (POR) circuit that powers up the DAC in the
100k
Ω power-down mode.
The MAX5842 features a double-buffered I 2 C-compati-
ble serial interface that allows multiple devices to share
a single bus. All logic inputs are CMOS-logic compati-
ble and buffered with Schmitt triggers, allowing direct
interfacing to optocoupled and transformer-isolated
interfaces. The MAX5842 minimizes digital noise
feedthrough by disconnecting the clock (SCL) signal
from the rest of the device when an address mismatch
is detected.
The MAX5842 is specified over the extended tempera-
ture range of -40°C to +85°C and is available in a
miniature 10-pin µMAX package. Refer to the MAX5841
data sheet for the 10-bit version.
Applications
Digital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Powered Equipment
ATE
Features
♦ Ultra-Low Supply Current
230µA at V DD = 3.6V
280µA at V
DD
= 5.5V
♦ 300nA Low-Power Power-Down Mode
♦ Single 2.7V to 5.5V Supply Voltage
♦ Fast 400kHz I
2 C-Compatible 2-Wire Serial
Interface
♦ Schmitt-Trigger Inputs for Direct Interfacing to
Optocouplers
♦ Rail-to-Rail Output Buffer Amplifiers
♦ Three Software-Selectable Power-Down Output
Impedances
100k Ω, 1kΩ, and High Impedance
♦ Read-Back Mode for Bus and Data Checking
♦ Power-On Reset to Zero
♦ 10-Pin µMAX Package
MAX5842
Quad, 12-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
5
10
9
8
7
6
OUTD
OUTC
OUTB
OUTA GND
V DD
SCL
ADD
MAX5842
µMAX
TOP VIEW
REF SDA
Pin Configuration
Ordering Information
R P
R P
V DD
µC
SDA SCL
SDA
SDA
REF
REF
REF
SCL
SCL
V DD
V DD
R S
R S
V DD
OUTA
OUTB MAX5842
MAX5842
R S
R S
OUTC
OUTD
OUTB
OUTC
OUTD
OUTA
Typical Operating Circuit
19-2317; Rev 0; 1/02
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP
RANGE
PIN-
PACKAGE
ADDRESS
MAX5842LEUB -40 o C to +85 o C 10 µMAX 0111 10X
MAX5842MEUB -40 o C to +85 o C 10 µMAX 1011 10X
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I
2 C is a trademark of Philips Corp.