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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5812 Datasheet

12-Bit Low-Power / 2-Wire / Serial Voltage-Output DAC

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19-2340; Rev 0; 1/02
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
General Description
The MAX5812 is a single, 12-bit voltage-output, digital-to-
analog converter (DAC) with an I2C™-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 100µA at VDD = 3.6V. A low-power power-
down mode decreases current consumption to less than
1µA. The MAX5812 features three software-selectable
power-down output impedances: 100k, 1k, and high
impedance. Other features include an internal precision
Rail-to-Rail® output buffer and a power-on reset circuit
that powers up the DAC in the 100kpower-down mode.
The MAX5812 features a double-buffered I2C-compatible
serial interface that allows multiple devices to share a sin-
gle bus. All logic inputs are CMOS-logic compatible and
buffered with Schmitt triggers, allowing direct interfacing
to optocoupled and transformer-isolated interfaces. The
MAX5812 minimizes digital noise feedthrough by discon-
necting the clock (SCL) signal from the rest of the device
when an address mismatch is detected.
The MAX5812 is specified over the extended temperature
range of -40°C to +85°C and is available in a space-sav-
ing 6-pin SOT23 package. Refer to the MAX5811 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-Operated Equipment
Typical Operating Circuit
VDD
µC
SDA SCL
VDD
RP RP
RS
SCL
VDD
RS SDA MAX5812 OUT
RS
SCL VDD
RS
SDA MAX5812 OUT
Features
o Ultra-Low Supply Current
100µA at VDD = 3.6V
130µA at VDD = 5.5V
o 300nA Low-Power Power-Down Mode
o Single 2.7V to 5.5V Supply Voltage
o Fast 400kHz I2C-Compatible 2-Wire Serial
Interface
o Schmitt-Trigger Inputs for Direct Interfacing to
Optocouplers
o Rail-to-Rail Output Buffer Amplifier
o Three Software-Selectable Power-Down Output
Impedances
100k, 1k, and High Impedance
o Read-Back Mode for Bus and Data Checking
o Power-On Reset to Zero
o Miniature 6-Pin SOT23 Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX5812LEUT -40°C to +85°C 6 SOT23
AAYT
MAX5812MEUT -40°C to +85°C 6 SOT23
AAYV
MAX5812NEUT -40°C to +85°C 6 SOT23
AAYX
MAX5812PEUT -40°C to +85°C 6 SOT23
AAYZ
Selector Guide appears at end of data sheet.
Functional Diagram appears at end of data sheet.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I2C is a trademark of Philips Corporation.
Pin Configuration
TOP VIEW
VDD 1
GND 2
SDA 3
MAX5812
6 OUT
5 ADD
4 SCL
SOT23
________________________________________________________________ Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5812 Datasheet

12-Bit Low-Power / 2-Wire / Serial Voltage-Output DAC

No Preview Available !

12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
ABSOLUTE MAXIMUM RATINGS
VDD, SCL, SDA to GND ............................................-0.3V to +6V
OUT, ADD to GND ........................................-0.3V to VDD + 0.3V
Maximum Current Into Any Pin ...........................................50mA
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23 (derate 9.1mW above +70°C).................727mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.5V, GND = 0, RL = 5k, CL = 200pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at
VDD = +5V, TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
STATIC ACCURACY (Note 2)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Zero-Code Error
Zero-Code Error Tempco
N
INL
DNL
ZCE
(Note 3)
Guaranteed monotonic (Note 3)
Code = 000 hex, VDD = 2.7V
12 Bits
±2 ±16 LSB
±1 LSB
±6 ±40 mV
2.3 ppm/oC
Gain Error
Gain-Error Tempco
GE Code = FFF hex
-0.8
0.26
-3 %FS
ppm/oC
DAC OUTPUT
Output Voltage Range
DC Output Impedance
Short-Circuit Current
Wake-Up Time
DAC Output Leakage Current
DIGITAL INPUTS (SCL, SDA)
No load (Note 4)
Code = 800 hex
VDD = 5V, VOUT = full scale (short to GND)
VDD = 3V, VOUT = full scale (short to GND)
VDD = 5V
VDD = 3V
Power-down mode = high impedance,
VDD = 5.5V, VOUT = VDD or GND
0
VDD
V
1.2
42.2
mA
15.1
8
µs
8
±0.1
±1
µA
Input High Voltage
Input Low Voltage
Input Hysteresis
Input Leakage Current
Input Capacitance
VIH
VIL
Digital inputs = 0 or VDD
0.7 VDD
0.3 VDD
0.05 VDD
±0.1 ±1
6
V
V
V
µA
pF
DIGITAL OUTPUT (SDA)
Output Logic Low Voltage
VOL ISINK = 3mA
Three-State Leakage Current
IL Digital inputs = 0 or VDD
Three-State Output Capacitance
0.4
±0.1 ±1
6
V
µA
pF
DYNAMIC PERFORMANCE
Voltage-Output Slew Rate
SR
0.5 V/µs
Voltage-Output Settling Time
To 1/2LSB code 400 hex to C00 hex or
C00 hex to 400 hex (Note 5)
4 12 µs
2 _______________________________________________________________________________________


Part Number MAX5812
Description 12-Bit Low-Power / 2-Wire / Serial Voltage-Output DAC
Maker Maxim
Total Page 13 Pages
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