MAX5812 ,12-Bit Low-Power, 2-Wire, Serial Voltage-Output DACApplicationsPART TEMP RANGEPACKAGE MARKDigital Gain and Offset AdjustmentsMAX5812LEUT -40°C to +85° ..
MAX5812LEUT+T ,12-Bit Low-Power, 2-Wire, Serial Voltage-Output DACApplicationsPART TEMP RANGEPACKAGE MARKDigital Gain and Offset AdjustmentsMAX5812LEUT -40°C to +85° ..
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 ..
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
MAX5812
12-Bit Low-Power, 2-Wire, Serial Voltage-Output DAC
General DescriptionThe 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: 100kΩ, 1kΩ, 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 100kΩpower-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.
ApplicationsDigital Gain and Offset Adjustments
Programmable Voltage and Current Sources
Programmable Attenuation
VCO/Varactor Diode Control
Low-Cost Instrumentation
Battery-Operated Equipment
FeaturesUltra-Low Supply Current
100µA at VDD = 3.6V
130µA 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 AmplifierThree Software-Selectable Power-Down Output
Impedances
100kΩ, 1kΩ, and High ImpedanceRead-Back Mode for Bus and Data CheckingPower-On Reset to ZeroMiniature 6-Pin SOT23 Package
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DACSCLSDA
VDD
ADDGND
OUT
MAX5812
SOT23TOP VIEW4
Pin Configuration
Ordering InformationRP
VDD
SDASCL
SDA
SDA
SCL
SCL
VDD
VDD
VDD
OUT
OUTMAX5812
MAX5812
Typical Operating Circuit19-2340; Rev 0; 1/02
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARKMAX5812LEUT-40°C to +85°C6 SOT23AAYT
MAX5812MEUT-40°C to +85°C6 SOT23AAYV
MAX5812NEUT-40°C to +85°C6 SOT23AAYX
MAX5812PEUT-40°C to +85°C6 SOT23AAYZ
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
I2C is a trademark of Philips Corporation.
Selector Guide appears at end of data sheet.
Functional Diagram appears at end of data sheet.
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +5.5V, GND = 0, 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, 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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
STATIC ACCURACY (Note 2)ResolutionN12Bits
Integral NonlinearityINL(Note 3)±2±16LSB
Differential NonlinearityDNLGuaranteed monotonic (Note 3)±1LSB
Zero-Code ErrorZCECode = 000 hex, VDD = 2.7V±6±40mV
Zero-Code Error Tempco2.3ppm/oC
Gain ErrorGECode = FFF hex-0.8-3%FS
Gain-Error Tempco0.26ppm/oC
DAC OUTPUTOutput Voltage RangeNo load (Note 4)0VDDV
DC Output ImpedanceCode = 800 hex1.2Ω
VDD = 5V, VOUT = full scale (short to GND)42.2Short-Circuit CurrentVDD = 3V, VOUT = full scale (short to GND)15.1mA
VDD = 5V8Wake-Up TimeVDD = 3V8µs
DAC Output Leakage CurrentPower-down mode = high impedance,
VDD = 5.5V, VOUT = VDD or GND±0.1±1µA
DIGITAL INPUTS (SCL, SDA)Input High VoltageVIH0.7 ✕ VDDV
Input Low VoltageVIL0.3 ✕ VDDV
Input Hysteresis0.05 ✕ VDDV
Input Leakage CurrentDigital inputs = 0 or VDD±0.1±1µA
Input Capacitance6pF
DIGITAL OUTPUT (SDA)Output Logic Low VoltageVOLISINK = 3mA0.4V
Three-State Leakage CurrentILDigital inputs = 0 or VDD±0.1±1µA
Three-State Output Capacitance6pF
DYNAMIC PERFORMANCEVoltage-Output Slew RateSR0.5V/µs
Voltage-Output Settling TimeTo 1/2LSB code 400 hex to C00 hex or
C00 hex to 400 hex (Note 5)412µs
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
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 115 to 3981.
Note 4:Offset and gain error limit the FSR.
Note 5:Guaranteed by design. Not production tested.
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, GND = 0, RL= 5kΩ, CL= 200pF, TA= TMINto TMAX, unless otherwise noted. Typical values are at
VDD= +5V, TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSDigital FeedthroughCode = 000 hex, digital inputs from 0 to VDD0.2nV-s
Digital-to-Analog Glitch ImpulseMajor carry transition, code = 7FF hex to 800
hex and 800 hex to 7FF hex12nV-s
POWER SUPPLIESSupply Voltage RangeVDD2.75.5V
All digital inputs at 0 or VDD = 3.6V100170Supply Current with No LoadAll digital inputs at 0 or VDD = 5.5V130190µA
Power-Down Supply CurrentAll digital inputs at 0 or VDD = 5.5V0.31µA
TIMING CHARACTERISTICS (Figure 1)Serial Clock FrequencyfSCL0400kHz
Bus Free Time Between STOP
and START ConditionstBUF1.3µs
START Condition Hold TimetHD, STA0.6µs
SCL Pulse Width LowtLOW1.3µs
SCL Pulse Width HightHIGH0.6µs
Repeated START Setup TimetSU, STA0.6µs
Data Hold TimetHD, DAT00.9µs
Data Setup TimetSU, DAT100ns
SDA and SCL Receiving
Rise Timetr(Note 5)0300ns
SDA and SCL Receiving
Fall Timetf(Note 5)0300ns
SDA Transmitting Fall Timetf(Note 5)20 +
0.1Cb250ns
STOP Condition Setup TimetSU-STO0.6µs
Bus CapacitanceCb(Note 5)400pF
Maximum Duration of
Suppressed Pulse WidthstSP050ns
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC1024204830724096
INTEGRAL NONLINEARITY
vs. INPUT CODEMAX5812 toc01
INPUT CODE
INTEGRAL NONLINEARITY (LSB)
INTEGRAL NONLINEARITY
vs. SUPPLY VOLTAGEMAX5812 toc02
SUPPLY VOLTAGE (V)
INTEGRAL NONLINEARITY (LSB)
INTEGRAL NONLINEARITY
vs. TEMPERATURE
MAX5812 toc03
TEMPERATURE (°C)
INTEGRAL NONLINEARITY (LSB)
DIFFERENTIAL NONLINEARITY
vs. INPUT CODE
MAX5812 toc04
INPUT CODE
DIFFERENTIAL NONLINEARITY (LSB)
DIFFERENTIAL NONLINEARITY
vs. SUPPLY VOLTAGE
MAX5812 toc05
SUPPLY VOLTAGE (V)
DIFFERENTIAL NONLINEARITY (LSB)
DIFFERENTIAL NONLINEARITY
vs. TEMPERATURE
MAX5812 toc06
TEMPERATURE (°C)
DIFFERENTIAL NONLINEARITY (LSB)
ZERO-CODE ERROR
vs. SUPPLY VOLTAGEMAX8512 toc07
SUPPLY VOLTAGE (V)
ZERO-CODE ERROR (mV)
NO LOAD
ZERO-CODE ERROR
vs. TEMPERATURE
MAX5812 toc08
TEMPERATURE (°C)
ZERO-CODE ERROR (mV)
NO LOAD
GAIN ERROR
vs. SUPPLY VOLTAGE
MAX5812 toc09
SUPPLY VOLTAGE (V)
GAIN ERROR (%FSR)
NO LOAD
Typical Operating Characteristics(VDD= +5V, RL= 5kΩ, TA= +25°C.)
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DACNO LOAD-15356085
GAIN ERROR vs. TEMPERATUREMAX5812 toc10
TEMPERATURE (°C)
GAIN ERROR (%FSR)
DAC OUTPUT VOLTAGE
vs. OUTPUT SOURCE CURRENT (NOTE 6)
MAX5812 toc11
OUTPUT SOURCE CURRENT (mA)
DAC OUTPUT VOLTAGE (V)268
CODE = FFF hex
DAC OUTPUT VOLTAGE
vs. OUTPUT SINK CURRENT (NOTE 6)
MAX5812 toc12
OUTPUT SINK CURRENT (mA)
DAC OUTPUT VOLTAGE (V)
CODE = 400 hex
SUPPLY CURRENT
vs. INPUT CODE
MAX5812 toc13
INPUT CODE
SUPPLY CURRENT (
NO LOAD
SUPPLY CURRENT
vs. TEMPERATURE
MAX5812 toc14
TEMPERATURE (°C)
SUPPLY CURRENT (
NO LOAD
CODE = FFF hex
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5812 toc15
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
CODE = FFF hex
NO LOAD
POWER-DOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5812 toc16
SUPPLY VOLTAGE (V)
POWER-DOWN SUPPLY CURRENT (nA)
ZOUT = HIGH IMPEDANCE
NO LOAD
TA = +25°C
TA = -40°C
TA = +85°COUT
10mV/div
VDD
100μs/div
POWER-UP GLITCHMAX5812 toc17
EXITING SHUTDOWNMAX5812 toc18
500mV/divOUT
2μs/div
CLOAD = 200pFCODE = 800 hex
Typical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, TA= +25°C.)
Note 6:The ability to drive loads less than 5kΩis not implied.
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
Typical Operating Characteristics (continued)(VDD= +5V, RL= 5kΩ, TA= +25°C.)
MAJOR CARRY TRANSITION
(POSITIVE)MAX5812 toc19
5mV/divOUT
2μs/div
CLOAD = 200pF
RL = 5kΩ
CODE = 7FF hex TO 800 hex
MAJOR CARRY TRANSITION
(NEGATIVE)MAX5812 toc20
5mV/divOUT
2μs/div
CLOAD = 200pF
RL = 5kΩ
CODE = 7FF hex TO 800 hex
SETTLING TIME
(POSITIVE)MAX5812 toc21
500mV/divOUT
2μs/div
CLOAD = 200pFCODE = 400 hex to C00 hex
SETTLING TIME
(NEGATIVE)MAX5812 toc22
500mV/divOUT
2μs/div
CLOAD = 200pFCODE = C00 hex to 400 hex
DIGITAL FEEDTHROUGHMAX5812 toc23
2mV/div
2V/div
OUT
SCL
40μs/div
CLOAD = 200pF
fSCL = 12kHz
CODE = 000 hex
MAX5812
12-Bit Low-Power, 2-Wire, Serial
Voltage-Output DAC
Detailed DescriptionThe MAX5812 is a 12-bit, voltage-output DAC with an
I2C/SMBus-compatible 2-wire interface. The device con-
sists of a serial interface, power-down circuitry, input
and DAC registers, a 12-bit resistor string DAC, unity-
gain output buffer, and output resistor network. The seri-
al interface decodes the address and control bits,
routing the data to either the input or DAC register. Data
can be directly written to the DAC register immediately
updating the device output, 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 MAX5812 uses a segmented resistor string DAC
architecture, which saves power in the overall system
and guarantees output monotonicity. The MAX5812’s
input coding is straight binary with the output voltage
given by the following equation:
where N = 12(bits), and D = the decimal value of the
input code (0 to 4095).
Output BufferThe MAX5812 analog output is buffered by a precision
unity-gain follower that slews 0.5V/µs. The buffer output
swings rail-to-rail and is capable of driving 5kΩin paral-
lel with 200pF. The output settles to ±0.5LSB within 4µs.
Power-On ResetThe MAX5812 features an internal power-on-reset
(POR) circuit that initializes the device upon power-up.
The DAC registers are set to zero-scale and the device
is powered down with the output buffer disabled and
the output pulled to GND through the 100kΩtermina-
tion resistor. Following power-up, a wake-up command
must be initiated before conversions are performed.
Power-Down ModesThe MAX5812 has three software-controlled, low-
power, power-down modes. All three modes disable
the output buffer and disconnect the DAC resistor
string from VDD, reducing supply current draw to
300nA. 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 resis-
tor. 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 MAX5812 features an I2C/SMBus-compatible
2-wire interface consisting of a serial data line (SDA)VDOUTREF=×()
Pin Description
PINNAMEFUNCTION1VDDPower Supply and DAC Reference InputGNDGroundSDABidirectional Serial Data I/OSCLSerial Clock LineADDAddress Select. A logic high sets the address LSB to 1; a logic low sets the address LSB to 0.OUTAnalog Output
Table 1. Power-Down Command Bits
POWER-DOWN
COMMAND BITS
PD1PD0
MODE/FUNCTION0Power-up device. DAC output restored to previous value.1Power-down mode 0. Powers down device with output floating.0Power-down mode 1. Powers down device with output terminated with 1kΩ to GND.1Power-down mode 2. Powers down device with output terminated with 100kΩ to GND.
