MAX5820LEUA ,Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationsMAX5820MEUA -40°C to +85°C 8 µMAX 1011 00XDigital Gain and Offset AdjustmentsProgrammab ..
MAX5820LEUA+ ,Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, GND = 0, V = V , R = 5kΩ, C = 200pF, T = T to T , un ..
MAX5820MEUA+ ,Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationsMAX5820MEUA -40°C to +85°C 8 µMAX 1011 00XDigital Gain and Offset AdjustmentsProgrammab ..
MAX5821LEUA ,Dual, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplications MAX5821LEUA -40 C to +85 C 8 µMAX 0111 00Xo oMAX5821MEUA -40 C to +85 C 8 µMAX 1011 00 ..
MAX5822LEUA+ ,Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationso oMAX5822LEUA -40 C to +85 C 8 µMAX 0111 00XDigital Gain and Offset Adjustmentso oMAX5 ..
MAX5822LEUA+ ,Dual, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, GND = 0, V = V , R = 5kΩ , C = 200pF, T = T to T , u ..
MAZ8039-H ,Silicon planar typeFeatures•Extremely low noise voltage caused from the diode (2.4V to 39V,1/3 to 1/10 of our conventi ..
MAZ8039L ,Silicon planar typeAbsolute Maximum Ratings T = 25°CaMarking SymbolParameter Symbol Rating UnitRefer to the list of t ..
MAZ8039-L ,Silicon planar typeElectrical Characteristics T = 25°CaParameter Symbol Conditions Min Typ Max UnitForward voltage V ..
MAZ8043-H ,Silicon planar typeelectrical characteristicsZ Zwithin part numbersReverse current I V ··············· Specified value ..
MAZ8043-L ,Silicon planar typeAbsolute Maximum Ratings T = 25°CaMarking SymbolParameter Symbol Rating UnitRefer to the list of t ..
MAZ8043-M ,Silicon planar typeZener DiodesMAZ8000 SeriesSilicon planar typeUnit : mmFor stabilization of power supplyKA
MAX5820LEUA
Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC
General DescriptionThe 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
impedances: 100kΩ, 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 100kΩpower-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.
ApplicationsDigital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Operated Instrumentation
FeaturesUltra-Low Supply Current
115µA at VDD= 3.6V
135µA at VDD= 5.5V300nA Low-Power Power-Down ModeSingle 2.7V to 5.5V Supply VoltageFast 400kHz I2C-Compatible 2-Wire
Serial InterfaceSchmitt-Trigger Inputs for Direct Interfacing
to OptocouplersRail-to-Rail Output Buffer AmplifiersThree Software-Selectable Power-Down Output
Impedances
100kΩ, 1kΩ, and High ImpedanceReadback Mode for Bus and Data CheckingPower-On Reset to Zero8-Pin µMAX Package
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
Pin Configuration
Ordering Information
Typical Operating Circuit19-3538; Rev 0; 2/05
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 the2C Standard Specification defined by Philips.
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +5.5V, GND = 0, VREF= VDD, RL= 5kΩ, CL= 200pF, TA= TMINto TMAX, unless otherwise noted. Typical values are
at VDD= +5V, TA= +25°C.) (Note 1)
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.
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
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, GND = 0, VREF= VDD, RL= 5kΩ, CL= 200pF, TA= TMINto TMAX, unless otherwise noted. Typical values are
at VDD= +5V, TA= +25°C.) (Note 1)
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
INTEGRAL NONLINEARITY
vs. INPUT CODEMAX5820 toc01
INPUT CODE
INL (LSB)
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX5820 toc02
SUPPLY VOLTAGE (V)
INL (LSB)
INTEGRAL NONLINEARITY
vs. TEMPERATURE
MAX5820 toc03
TEMPERATURE (°C)
INL (LSB)3510-15
DIFFERENTIAL NONLINEARITY
vs. INPUT CODE
MAX5820 toc04
INPUT CODE
DNL (LSB)
DIFFERENTIAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX5820 toc05
SUPPLY VOLTAGE (V)
DNL (LSB)
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
MAX5820 toc06
TEMPERATURE (°C)
DNL (LSB)3510-15
Typical Operating Characteristics
(VDD= +5V, RL= 5kΩ, TA= +25°C.)
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, GND = 0, VREF= VDD, RL= 5kΩ, CL= 200pF, TA= TMINto TMAX, unless otherwise noted. Typical values are
at VDD= +5V, TA= +25°C.) (Note 1)
Note 1:All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= TMINto TMAX.
Note 2:Static specifications are tested with the output unloaded.
Note 3:Linearity is guaranteed from codes 7 to 248.
Note 4:Offset and gain error limit the FSR.
Note 5:Guaranteed by design. Not production tested.
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
ZERO-CODE ERROR
vs. SUPPLY VOLTAGEMAX5820 toc07
SUPPLY VOLTAGE (V)
ZERO-CODE ERROR (mV)
ZERO-CODE ERROR
vs. TEMPERATURE
MAX5820 toc08
TEMPERATURE (°C)
ZERO-CODE ERROR (mV)3510-15
GAIN ERROR vs. SUPPLY VOLTAGE
MAX5820 toc09
SUPPLY VOLTAGE (V)
GAIN ERROR (%FSR)
GAIN ERROR vs. TEMPERATURE
MAX5820 toc10
TEMPERATURE (°C)
GAIN ERROR (%FSR)3510-15
DAC OUTPUT VOLTAGE
vs. OUTPUT SOURCE CURRENT (NOTE 6)
MAX5820 toc11
OUTPUT SOURCE CURRENT (mA)
DAC OUTPUT VOLTAGE (V)642
DAC OUTPUT VOLTAGE
vs. OUTPUT SINK CURRENT (NOTE 6)
MAX5820 toc12
OUTPUT SINK CURRENT (mA)
DAC OUTPUT VOLTAGE (V)642
SUPPLY CURRENT vs. INPUT CODE
MAX5820 toc13
INPUT CODE
SUPPLY CURRENT (
SUPPLY CURRENT vs. TEMPERATURE
MAX5820 toc14
TEMPERATURE (°C)
SUPPLY CURRENT (3510-15
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5820 toc15
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
2.75.5
ypical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, TA= +25°C.)
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
POWER-DOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGEMAX5820 toc16
SUPPLY VOLTAGE (V)
POWER-DOWN SUPPLY CURRENT (nA)
POWER-UP GLITCH
MAX5820 toc17
100µs/div
VDD
OUT_
10mV/div
EXITING SHUTDOWNMAX5820 toc18
2µs/div
OUT_500mV/div
MAJOR CARRY TRANSITION
(POSITIVE)MAX5820 toc19
2µs/div
OUT_5mV/div
MAJOR CARRY TRANSITION
(NEGATIVE)MAX5820 toc20
2µs/div
OUT_5mV/div
SETTLING TIME
(POSITIVE)MAX5820 toc21
2µs/div
OUT_500mV/div
SETTLING TIME
(NEGATIVE)MAX5820 toc22
2µs/div
OUT_500mV/div
DIGITAL FEEDTHROUGHMAX5820 toc23
40µs/div
OUT_2mV/div
SCL2V/div
CROSSTALKMAX5820 toc24
4µs/div
VOUTB1mV/div
VOUTA2V/div
Typical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, TA= +25°C.)
Note 6:The ability to drive loads greater than 5kΩis not implied.
Detailed DescriptionThe MAX5820 is a dual, 8-bit, voltage-output DAC with
an I2C/SMBus™-compatible 2-wire interface. The
device consists of a serial interface, power-down cir-
cuitry, dual input and DAC registers, two 8-bit resistor
string DACs, two unity-gain output buffers, and output
resistor networks. The serial interface decodes the
address and control bits, routing the data to the proper
input or DAC register. Data can be directly written to
the DAC register, immediately updating the device out-
put, or can be written to the input register without
changing the DAC output. Both registers retain data as
long as the device is powered.
DAC OperationThe MAX5820 uses a segmented resistor string DAC
architecture, which saves power in the overall system
and guarantees output monotonicity. The MAX5820’s
input coding is straight binary, with the output voltage
given by the following equation:
where N = 8 (bits) and D = the decimal value of the
input code (0 to 255).
Output BufferThe MAX5820 analog outputs are buffered by precision,
unity-gain followers that slew 0.5V/µs. Each buffer output
swings rail-to-rail, and is capable of driving 5kΩin parallel
with 200pF. The output settles to ±0.5 LSB within 4µs.
Power-On ResetThe MAX5820 features an internal POR circuit that ini-
tializes the device upon power-up. The DAC registers
are set to zero scale and the device is powered down,
with the output buffers disabled and the outputs pulled
to GND through the 100kΩtermination resistor.
Following power-up, a wake-up command must be initi-
ated before any conversions are performed.
Power-Down ModesThe MAX5820 has three software-controlled low-power
power-down modes. All three modes disable the output
buffers and disconnect the DAC resistor strings from
REF, reducing supply current draw to 1µA and the ref-
erence current draw to less than 1µA. In power-down
mode 0, the device output is high impedance. In
power-down mode 1, the device output is internally
pulled to GND by a 1kΩtermination resistor. In power-
down mode 2, the device output is internally pulled to
GND by a 100kΩtermination resistor. Table 1 shows
the power-down mode command words.
Upon wake-up, the DAC output is restored to its previ-
ous value. Data is retained in the input and DAC regis-
ters during power-down mode.
Digital Interface The MAX5820 features an I2C/SMBus-compatible 2-
wire interface consisting of a serial data line (SDA) and
a serial clock line (SCL). The MAX5820 is SMBus com-
patible within the range of VDD= 2.7V to 3.6V. SDA and
SCL facilitate bidirectional communication between the
MAX5820 and the master at rates up to 400kHz. Figure
1 shows the 2-wire interface timing diagram. The
MAX5820 is a transmit/receive slave-only device, rely-
ing upon a master to generate a clock signal. The mas-
ter (typically a microcontroller) initiates data transfer on
the bus and generates SCL to permit that transfer.
A master device communicates to the MAX5820 by
transmitting the proper address followed by command
and/or data words. Each transmit sequence is framed
by a START (S) or REPEATED START (Sr) condition and
a STOP (P) condition. Each word transmitted over the
bus is 8 bits long and is always followed by an
acknowledge clock pulse.
MAX5820
Dual, 8-Bit, Low-Power, 2-Wire, Serial
Voltage-Output DAC
