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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5820 Datasheet

Serial Voltage-Output DAC

No Preview Available !

19-3538; Rev 0; 2/05
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
General Description
The MAX5820 is a dual, 8-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
(115µA at VDD = 3.6V). A power-down mode decreases
current consumption to less than 1µA. The MAX5820 fea-
tures three software-selectable power-down output
www.DataSheefimet4apUte.ucdoreamsnciensc:lu1d0e0kint,e1rnkal,
and high
precision
impedance. Other
rail-to-rail output
buffers and a power-on reset (POR) circuit that powers up
the DAC in the 100kpower-down mode.
The MAX5820 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
MAX5820 minimizes digital noise feedthrough by discon-
necting the clock (SCL) signal from the rest of the device
when an address mismatch is detected.
The MAX5820 is specified over the extended (-40°C to
+85°C) temperature range and is available in a small
8-pin µMAX® package. Refer to the MAX5822 data
sheet for the 12-bit version and to the MAX5821 data
sheet for a 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 Instrumentation
Pin Configuration
TOP VIEW
VDD 1
GND 2
ADD 3
SCL 4
MAX5820
8 OUTB
7 OUTA
6 REF
5 SDA
µMAX
Features
Ultra-Low Supply Current
115µA at VDD = 3.6V
135µA at VDD = 5.5V
300nA Low-Power Power-Down Mode
Single 2.7V to 5.5V Supply Voltage
Fast 400kHz I2C-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, 1k, and High Impedance
Readback Mode for Bus and Data Checking
Power-On Reset to Zero
8-Pin µMAX Package
Ordering Information
PART
MAX5820LEUA
MAX5820MEUA
TEMP
RANGE
PIN-
PACKAGE
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 µMAX
ADDRESS
0111 00X
1011 00X
Typical Operating Circuit
VDD
µC
SDA SCL
RP
RP
VDD
RS
SCL VDD
RS
SDA MAX5820 OUTA
REF OUTB
RS
SCL VDD
RS SDA MAX5820 OUTA
REF OUTB
REF
µMAX is a registered trademark of Maxim Integrated Products, Inc.
*Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associate Companies, conveys a
license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the
I2C Standard Specification defined by Philips.
________________________________________________________________ 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

MAX5820 Datasheet

Serial Voltage-Output DAC

No Preview Available !

Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
ABSOLUTE MAXIMUM RATINGS
VDD, SCL, SDA to GND ............................................-0.3V to +6V
OUT_, REF, ADD to GND..............................-0.3V to VDD + 0.3V
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (TA = +70°C)
8-Pin µMAX (derate 4.5mW above +70°C) ...................362mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Maximum Junction Temperature .....................................+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
www.DataSheeatb4sUo.luctoemmaximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.5V, GND = 0, VREF = VDD, RL = 5k, CL = 200pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at VDD = +5V, TA = +25°C.) (Note 1)
PARAMETER
STATIC ACCURACY (NOTE 2)
Resolution
Integral Nonlinearity
Differential Nonlinearity
Zero-Code Error
Zero-Code Error Tempco
Gain Error
Gain-Error Tempco
Power-Supply Rejection Ratio
DC Crosstalk
REFERENCE INPUT
Reference Input Voltage Range
Reference Input Impedance
Reference Current
DAC OUTPUT
Output Voltage Range
DC Output Impedance
Short-Circuit Current
Wake-Up Time
SYMBOL
CONDITIONS
N
INL
DNL
ZCE
(Note 3)
Guaranteed monotonic (Note 2)
Code = 00 hex, VDD = 2.7V
GE Code = FF hex
PSRR Code = FF hex, VDD = 4.5V to 5.5V
VREF
Power-down mode
No load (Note 4)
Code = 80 hex
VDD = 5V, VOUT = full scale (short to GND)
VDD = 3V, VOUT = full scale (short to GND)
VDD = 5V
VDD = 3V
MIN TYP MAX UNITS
8 Bits
±0.5 ±1 LSB
±0.5 LSB
6 40 mV
2.3 ppm/oC
-0.8 -3 %FSR
0.26
ppm/oC
58.8 dB
30 µV
0
VDD
V
65 90
k
0.3 1
µA
0
VDD
V
1.2
42.2
mA
15.1
8
µs
8
DAC Output Leakage Current
DIGITAL INPUTS (SCL, SDA)
Power-down mode = high impedance,
VDD = 5.5V, VOUT_ = VDD to GND
±0.1
±1
µA
Input High Voltage
VIH
0.7 x
VDD
V
Input Low Voltage
VIL
0.3 x
VDD
V
2 _______________________________________________________________________________________


Part Number MAX5820
Description Serial Voltage-Output DAC
Maker Maxim Integrated Products
Total Page 13 Pages
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