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MAX1498 PDF даташит

Спецификация MAX1498 изготовлена ​​​​«Maxim Integrated Products» и имеет функцию, называемую «(MAX1447 - MAX1498) Single-Chip ADCs».

Детали детали

Номер произв MAX1498
Описание (MAX1447 - MAX1498) Single-Chip ADCs
Производители Maxim Integrated Products
логотип Maxim Integrated Products логотип 

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MAX1498 Даташит, Описание, Даташиты
19-3166; Rev 0; 1/04
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
General Description
The 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, 7mm
7mm 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.
Digital Panel Meters
Hand-Held Meters
Digital Voltmeters
Digital Multimeters
Applications
Pin Configurations appear at end of data sheet.
Features
High 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
Rejection
Selectable Input Range of ±200mV or ±2V
Selectable Voltage Reference: Internal 2.048V or
External
Internal High-Accuracy Oscillator Needs No
External Components
Automatic Offset Calibration
On-Demand Enhanced Offset Calibration
(MAX1447)
Operate from a Single 2.7V to 5.25V Supply
Low Power (Exclude LED-Driver Current)
Maximum 744µA Operating Current (MAX1496)
Maximum 960µA Operating Current
(MAX1447/MAX1498)
Maximum 325µA Shutdown Currentwww.DataSheet.co.kr
Multiplexed Common-Cathode LED Drivers
Resistor-Programmable Segment Current
Small 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)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
RESOLUTION
(DIGITS)
MAX1447ECJ
MAX1496EAI*
MAX1496EPI
MAX1498ECJ
-40°C to +85°C 32 TQFP
-40°C to +85°C 28 SSOP
-40°C to +85°C 28 PDIP
-40°C to +85°C 32 TQFP
4.5
3.5
3.5
4.5
*Future product—contact factory for availability.
________________________________________________________________ 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.
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MAX1498 Даташит, Описание, Даташиты
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
ABSOLUTE MAXIMUM RATINGS
AVDD to GND (MAX1447/MAX1498) ........................-0.3V to +6V
DVDD to GND (MAX1447/MAX1498)........................-0.3V to +6V
AIN+, AIN- to GND
(MAX1447/MAX1498) ......................VNEG to (AVDD to +0.3V)
REF+, REF- to GND
(MAX1447/MAX1498) ..................... VNEG to (AVDD to +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)
VDD to GND (MAX1496) ...........................................-0.3V to +6V
AIN+, AIN- to GND (MAX1496)..............VNEG to (VDD to +0.3V)
REF+, REF- to GND (MAX1496) ........... VNEG to (VDD to +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
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
(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 otherwisewww.DataSheet.co.kr noted. All specifications are at TA = TMIN to TMAX.
Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC ACCURACY
Noise-Free Resolution
MAX1447/MAX1498
MAX1496
-19,999
-1999
+19,999
Counts
+1999
Integral Nonlinearity (Note 1)
2.000V range
INL
200mV range
±1
Counts
±1
Range Change Ratio
(VAIN+ - VAIN- = 0.100V) on 200mV range
(VAIN+ - VAIN- = 0.100V) on 2.0V range
10:1 Ratio
Rollover Error
VAIN+ - VAIN- = full scale
VAIN- - VAIN+ = full scale
±1 Counts
Output Noise
Offset Error (Zero Input Reading)
Gain Error
Offset Drift (Zero Reading Drift)
Gain Drift
Offset
VIN = 0 (Note 2)
(Note 3)
VIN = 0 (Note 4)
10 µVP-P
-0 0 Readings
-0.5 +0.5 % FSR
0.1 µV/°C
±1 ppm/°C
INPUT CONVERSION RATE
Conversion Rate
5 Hz
2 _______________________________________________________________________________________
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MAX1498 Даташит, Описание, Даташиты
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
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 = TMIN to TMAX.
Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
ANALOG INPUTS (AIN+, AIN-) (bypass to GND with 0.1µF or greater capacitors)
RANGE = GND
AIN Input Voltage Range (Note 5)
RANGE = DVDD (MAX1447/MAX1498) or
VDD (MAX1496)
MIN TYP MAX UNITS
-2.0 +2.0
V
-0.2 +0.2
AIN Absolute Input Voltage
Range to GND
-2.2
+2.2
V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100 dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR For 50Hz and 60Hz ±2%, RSOURCE < 10k
150
dB
Common-Mode Rejection
Input Leakage Current
Input Capacitance
Average Dynamic Input Current
CMR At DC
(Note 6)
100
10
10
-20 +20
dB
nA
pF
nA
INTERNAL REFERENCE (REF- = GND, INTREF = DVDD (MAX1447/MAX1498) or VDD (MAX1496) (bypass REF+ to GND with a
4.7µF capacitor)
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REF Output Voltage
VREF
2.007 2.048 2.089
V
REF Output Short-Circuit Current
1 mA
REF Output Temperature
Coefficient
TCVREF
40 ppm/°C
Load Regulation
Line Regulation
ISOURCE = 0 to 300µA, ISINK = 0 to 30µA
6
50
Noise Voltage
0.1Hz to 10Hz
10Hz to 10kHz
25
400
EXTERNAL REFERENCE (INTREF = GND) (bypass REF+ and REF- to GND with 0.1µF or greater capacitors)
REF Input Voltage
Differential, VREF+ - VREF-
2.048
Absolute REF+, REF- Input
Voltage to GND
-2.2 +2.2
mV/µA
µV/V
µVP-P
V
V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100 dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR For 50Hz and 60Hz ±2%, RSOURCE < 10k
150
dB
Common-Mode Rejection
Input Leakage Current
Input Capacitance
Average Dynamic Input Current
CMR At DC
(Note 6)
100
10
10
-20 +20
dB
nA
pF
nA
_______________________________________________________________________________________ 3
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