MAX1496EPI+ ,3.5- and 4.5-Digit, Single-Chip ADCs with LED DriversApplications Ordering InformationDigital Panel MetersPIN- RESOLUTIONPART TEMP RANGEHand-Held Meters ..
MAX14998ETO+ ,Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD ControlApplications*EP = Exposed pad.Notebook PCsTypical Operating Circuit appears at end of data sheet.De ..
MAX149ACAP ,+2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCsGeneral Description ________
MAX149ACAP+ ,+2.7V to +5.25V Low-Power 8-Channel Serial 10-Bit ADCsELECTRICAL CHARACTERISTICS(V = +2.7V to +5.25V; COM = 0; f = 2.0MHz; external clock (50% duty cycle ..
MAX149AEAP ,+2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCsELECTRICAL CHARACTERISTICSV = +2.7V to +5.25V; COM = 0V; f = 2.0MHz; external clock (50% duty cycle ..
MAX149BCAP ,+2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCsMAX148/MAX14919-0464; Rev 2; 5/98+2.7V to +5.25V, Low-Power, 8-Channel, Serial 10-Bit ADCs
MAX4120ESD ,Single/Dual/Quad / 400MHz / Low-Power / Current Feedback AmplifiersGeneral Description ________
MAX4121CSA ,330MHz Buffered Video Switches/ Crosspoint Building Blocksfeaturesinclude -92dB crosstalk and -78dB isolation (MAX4121).' Ultra-Low Switching GlitchThe MAX41 ..
MAX4122EUK ,Single/Dual/Quad / Wide-Bandwidth / Low-Power / Single-Supply Rail-to-Rail I/O Op AmpsELECTRICAL CHARACTERISTICS (continued)(V = +2.7V to +6.5V, V = 0V, V = 0V, V = V /2, R tied to V /2 ..
MAX4122EUK+T ,Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op AmpsMAX4122–MAX412919-1087; Rev 1; 8/97Single/Dual/Quad, Wide-Bandw idth, Low -Pow er,Single-Supply Rai ..
MAX4122EUK-T ,Single/Dual/Quad, Wide-Bandwidth, Low-Power, Single-Supply Rail-to-Rail I/O Op AmpsFeaturesThe MAX4122–MAX4129 family of operational amplifiers♦ 5-Pin SOT23 Package (MAX4122/4)combin ..
MAX4123ESA ,Single/Dual/Quad / Wide-Bandwidth / Low-Power / Single-Supply Rail-to-Rail I/O Op AmpsApplicationsMAX4123C/D 0°C to +70°C Dice* —Battery-Powered InstrumentsMAX4123ESA -40°C to +85°C 8 S ..
MAX1496EPI+
3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers
General DescriptionThe MAX1447/MAX1496/MAX1498 low-power, 3.5- and
4.5-digit, analog-to-digital converters (ADCs) with inte-
grated light-emitting diode (LED) drivers operate from a
single 2.7V to 5.25V power supply. They include an
internal reference, a high-accuracy on-chip oscillator,
and a multiplexed LED display driver. An internal charge
pump generates the negative supply needed to power
the integrated input buffers for single-supply operation.
The ADC is configurable for either a ±2V or ±200mV
input range and it outputs its conversion results to an
LED. The MAX1496 is a 3.5-digit (±1999 count) device
and the MAX1447/MAX1498 are 4.5-digit (±19,999
count) devices.
The MAX1447/MAX1496/MAX1498 do not require exter-
nal precision integrating capacitors, autozero capaci-
tors, crystal oscillators, charge pumps, or other circuitry
required with dual-slope ADCs (commonly used in
panel meter circuits).
These devices also feature on-chip buffers for the dif-
ferential signal and reference input, allowing direct
interface with high-impedance signal sources. In addi-
tion, they use continuous internal offset-calibration and
offer >100dB rejection of 50Hz and 60Hz line noise.
Other features include data hold and peak detection
and overrange/underrange detection. The MAX1447
features on-demand enhanced offset calibration for
improved offset performance.
The MAX1447/MAX1498 are available in a 32-pin, 7mm7mm TQFP package and the MAX1496 is available in
28-pin SSOP and 28-pin PDIP packages. All devices in
this family operate over the -40°C to +85°C extended
temperature range.
ApplicationsDigital Panel Meters
Hand-Held Meters
Digital Voltmeters
Digital Multimeters
FeaturesHigh Resolution
MAX1447/MAX1498: 4.5 Digits (±19,999 Count)
MAX1496: 3.5 Digits (±1999 Count) Sigma-Delta ADC Architecture
No Integrating Capacitors Required
No Autozeroing Capacitors Required
>100dB of Simultaneous 50Hz and 60Hz
RejectionSelectable Input Range of ±200mV or ±2VSelectable Voltage Reference: Internal 2.048V or
ExternalInternal High-Accuracy Oscillator Needs No
External ComponentsAutomatic Offset CalibrationOn-Demand Enhanced Offset Calibration
(MAX1447)Operate from a Single 2.7V to 5.25V SupplyLow Power (Exclude LED-Driver Current)
Maximum 744µA Operating Current (MAX1496)
Maximum 960µA Operating Current
(MAX1447/MAX1498)
Maximum 325µA Shutdown CurrentMultiplexed Common-Cathode LED Drivers
Resistor-Programmable Segment CurrentSmall 32-Pin, 7mm x 7mm TQFP Package (4.5
Digits), 28-Pin SSOP Package (3.5 Digits)Also Available in a PDIP Package (3.5 Digits)
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
Ordering Information19-3166; Rev 0; 1/04
PARTTEMP RANGEPIN-
PACKAGE
RESOLUTION
(DIGITS)
MAX1447ECJ-40°C to +85°C32 TQFP4.5
MAX1496EAI*-40°C to +85°C28 SSOP3.5
MAX1496EPI-40°C to +85°C28 PDIP3.5
MAX1498ECJ-40°C to +85°C32 TQFP4.5
Pin Configurations appear at end of data sheet.*Future product—contact factory for availability.
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
ABSOLUTE MAXIMUM RATINGSStresses 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.
AVDDto GND (MAX1447/MAX1498)........................-0.3V to +6V
DVDDto GND (MAX1447/MAX1498)........................-0.3V to +6V
AIN+, AIN- to GND
(MAX1447/MAX1498)......................VNEG to (AVDDto +0.3V)
REF+, REF- to GND
(MAX1447/MAX1498).....................VNEG to (AVDDto +0.3V)
INTREF, RANGE, DPSET1, DPSET2, HOLD, PEAK,
DPON to GND (MAX1447/MAX1498)..-0.3V to (DVDD+ 0.3V)
VNEG to GND (MAX1447/MAX1498).......-2.6V to (AVDD+ 0.3V)
LED_EN to GND (MAX1447/MAX1498)...-0.3V to (DVDD+ 0.3V)
ISET to GND (MAX1447/MAX1498).........-0.3V to (AVDD+ 0.3V)
VDDto GND (MAX1496)...........................................-0.3V to +6V
AIN+, AIN- to GND (MAX1496)..............VNEG to (VDDto +0.3V)
REF+, REF- to GND (MAX1496)...........VNEG to (VDDto +0.3V)
INTREF, RANGE, DPSET1, DPSET2, HOLD, PEAK,
DPON to GND (MAX1496).....................-0.3V to (VDD+ 0.3V)
VNEG to GND (MAX1496)..........................-2.6V to (VDD+ 0.3V)
ISET to GND (MAX1496)............................-0.3V to (VDD+ 0.3V)
VLED to GLED..........................................................-0.3V to +6V
GLED to GND........................................................-0.3V to +0.3V
SEG_ to GLED..........................................-0.3V to (VLED + 0.3V)
DIG_ to GLED..........................................-0.3V to (VLED + 0.3V)
DIG_ Sink Current.............................................................300mA
DIG_ Source Current...........................................................50mA
SEG_ Sink Current..............................................................50mA
SEG_ Source Current..........................................................50mA
Maximum Current Input into Any Other Pin........................50mA
Continuous Power Dissipation (TA= +70°C)
32-Pin TQFP (derate 20.7mW/°C above +70°C).....1652.9mW
28-Pin SSOP (derate 9.5mW/°C above +70°C)...........762mW
28-Pin PDIP (derate 14.3mW/°C above +70°C)......1142.9mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(AVDD= DVDD= VDD= +2.7V to +5.25V, GND = 0, VLED= +2.7V to +5.25V, GLED = 0, VREF+- VREF-= 2.048V (external reference),
CREF+= CREF-= 0.1µF, CVNEG= 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DC ACCURACYMAX1447/MAX1498-19,999+19,999Noise-Free ResolutionMAX1496-1999+1999Counts
2.000V range±1Integral Nonlinearity (Note 1)INL200mV range±1Counts
Range Change Ratio(VAIN+ - VAIN- = 0.100V) on 200mV range
(VAIN+ - VAIN- = 0.100V) on 2.0V range10:1Ratio
Rollover ErrorVAIN+ - VAIN- = full scale
VAIN- - VAIN+ = full scale±1Counts
Output Noise10µVP-P
Offset Error (Zero Input Reading)OffsetVIN = 0 (Note 2)-00Read ings
Gain Error(Note 3)-0.5+0.5% FSR
Offset Drift (Zero Reading Drift)VIN = 0 (Note 4)0.1µV/°C
Gain Drift±1ppm/°C
INPUT CONVERSION RATEConversion Rate5Hz
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
ANALOG INPUTS (AIN+, AIN-) (bypass to GND with 0.1µF or greater capacitors)RANGE = GND-2.0+2.0
AIN Input Voltage Range (Note 5)RANGE = DVDD (MAX1447/MAX1498) or
VDD (MAX1496)-0.2+0.2V
AIN Absolute Input Voltage
Range to GND-2.2+2.2V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)50Hz and 60Hz ±2%100dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)CMRFor 50Hz and 60Hz ±2%, RSOURCE < 10kΩ150dB
Common-Mode RejectionCMRAt DC100dB
Input Leakage Current10nA
Input Capacitance10pF
Average Dynamic Input Current(Note 6)-20+20nA
INTERNAL REFERENCE (REF- = GND, INTREF = DVDD (MAX1447/MAX1498) or VDD (MAX1496) (bypass REF+ to GND with a
4.7µF capacitor)REF Output VoltageVREF2.0072.0482.089V
REF Output Short-Circuit Current1mA
REF Output Temperature
CoefficientTCVREF40ppm/°C
Load RegulationISOURCE = 0 to 300µA, ISINK = 0 to 30µA6mV/µA
Line Regulation50µV/V
0.1Hz to 10Hz25Noise Voltage10Hz to 10kHz400µVP-P
EXTERNAL REFERENCE (INTREF = GND) (bypass REF+ and REF- to GND with 0.1µF or greater capacitors)REF Input VoltageDifferential, VREF+ - VREF-2.048V
Absolute REF+, REF- Input
Voltage to GND-2.2+2.2V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)50Hz and 60Hz ±2%100dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)CMRFor 50Hz and 60Hz ±2%, RSOURCE < 10kΩ150dB
Common-Mode RejectionCMRAt DC100dB
Input Leakage Current10nA
Input Capacitance10pF
Average Dynamic Input Current(Note 6)-20+20nA
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= VDD= +2.7V to +5.25V, GND = 0, VLED= +2.7V to +5.25V, GLED = 0, VREF+- VREF-= 2.048V (external reference),
CREF+= CREF-= 0.1µF, CVNEG= 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise noted.)
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
CHARGE PUMPOutput VoltageVNEGCVNEG = 0.1µF to GND-2.60-2.42-2.30V
DIGITAL INPUTS (INTREF, RANGE, PEAK, HOLD, DPSET1, DPSET2, DPON)Input CurrentIINVIN = 0 or DVDD = VDD-10+10µA
MAX1447/MAX14980.3 x
DVDD
Input Low VoltageVINL
MAX14960.3 x
VDD
MAX1447/MAX14980.7 x
DVDD
Input High VoltageVINH
MAX14960.7 x
VDD
Input HysteresisVHYS200mV
POWER SUPPLY (Note 7)VDD VoltageVDDMAX14962.705.25V
AVDD VoltageAVDDMAX1447/MAX14982.705.25V
DVDD VoltageDVDDMAX1447/MAX14982.705.25V
Power-Supply Rejection VDDPSRR(Note 8)80dB
Power-Supply Rejection AVDDPSRRA(Note 8)80dB
Power-Supply Rejection DVDDPSRRD(Note 8)100dB
VDD = 5.25V664744
VDD = 3.3V618663MAX1496 VDD Current (Note 9)IVDD
Standby mode268325
AVDD = 5.25V640
AVDD = 3.3V600MAX1447/MAX1498 AVDD
Current (Note 9)IAVDD
Standby mode305
DVDD = 5.25V320
DVDD = 3.3V180MAX1447/MAX1498 DVDD
Current (Note 9)IDVDD
Standby mode20
LED Drivers Bias CurrentFrom AVDD or VDD120µA
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= VDD= +2.7V to +5.25V, GND = 0, VLED= +2.7V to +5.25V, GLED = 0, VREF+- VREF-= 2.048V (external reference),
CREF+= CREF-= 0.1µF, CVNEG= 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise noted.)
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
LED DRIVERS (Table 5)LED Supply VoltageVLED2.705.25V
LED Shutdown Supply CurrentISHDNLED driver shutdown mode10µA
LED Supply CurrentILEDSeven segments and decimal point on,
RISET = 25kΩ176180mA
MAX1447/MAX1498512Display Scan RatefOSCMAX1496640Hz
Segment Current Slew Rate∆ISEG/∆t25mA/µs
DIG_ Voltage LowVDIGIDIG_ = 176mA0.1780.300V
Segment Drive Source Current
Matching∆ISEG3±10%
Segment Drive Source CurrentISEGVLED - VSEG = 0.6V, RISET = 25kΩ16.021.525.5mA
Interdigit Blanking Time4µs
ELECTRICAL CHARACTERISTICS (continued)(AVDD= DVDD= VDD= +2.7V to +5.25V, GND = 0, VLED= +2.7V to +5.25V, GLED = 0, VREF+- VREF-= 2.048V (external reference),
CREF+= CREF-= 0.1µF, CVNEG= 0.1µF. Internal clock mode, unless otherwise noted. All specifications are at TA= TMINto TMAX.
Typical values are at TA= +25°C, unless otherwise noted.)
Note 1:Integral nonlinearity is the deviation of the analog value at any code from its theoretical value after nulling the gain error and
offset error.
Note 2:Offset calibrated.
Note 3:Offset nulled.
Note 4:Drift error is eliminated by recalibration at the new temperature.
Note 5:The input voltage range for the analog inputs is given with respect to the voltage on the negative input of the differential pair.
Note 6:VAIN+ or VAIN- = -2.2V to +2.2V. VREF+ or VREF- = -2.2V to +2.2V. All input structures are identical. Production tested on
AIN+ and REF+ only.
Note 7:Power-supply currents are measured with all digital inputs at either GND or DVDD.
Note 8:Measured at DC by changing the power-supply voltage from 2.7V to 5.25V and measuring the effect on the conversion
error with external reference. PSRR at 50Hz and 60Hz exceeds 120dB with filter notches at 50Hz and 60Hz (Figure 2).
Note 9:LED drivers are disabled.
