DataSheet26.com

даташит MAX1495 PDF ( Datasheet )

MAX1495 Datasheet Download - Maxim

Номер произв MAX1495
Описание 3.5- and 4.5-Digit / Single-Chip ADCs
Производители Maxim
логотип Maxim логотип 



1Page
		

No Preview Available !

MAX1495 Даташит, Описание, Даташиты
19-3053; Rev 2; 5/04
EVAALVUAAILTAIOBNLEKIT
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
General Description
The MAX1491/MAX1493/MAX1495 low-power, 3.5- and
4.5-digit, analog-to-digital converters (ADCs) with inte-
grated liquid crystal display (LCD) drivers operate from a
single 2.7V to 5.25V power supply. They include an inter-
nal reference, a high-accuracy on-chip oscillator, and a
triplexed LCD driver. An internal charge pump generates
the negative supply needed to power the integrated input
buffer for single supply operation. The ADC is config-
urable for either a ±2V or ±200mV input range and it out-
puts its conversion results to an LCD. The MAX1491 is a
3.5-digit (±1999 count) device, and the MAX1493/
MAX1495 are 4.5-digit (±19,999 count) devices.
The MAX1491/MAX1493/MAX1495 do not require exter-
nal-precision integrating or auto-zero capacitors, 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 differential signal and reference inputs, allowing
direct interface with high-impedance signal sources. In
addition, the MAX1491/MAX1493/MAX1495 use continu-
ous internal offset calibration, and offer >100dB rejec-
tion of 50Hz and 60Hz line noise. The MAX1493/
MAX1495 perform enhanced offset calibration at power-
up. The MAX1495 also performs enhanced calibration
on demand. Other features include data hold and peak
hold, and a user programmable low-battery monitor.
The MAX1493/MAX1495 come in a 32-pin 7mm 7mm
TQFP package, and the MAX1491 comes in 28-pin
SSOP and 28-pin DIP packages. All devices in this fam-
ily operate over the 0°C to +70°C commercial tempera-
ture range.
Digital Panel Meters
Hand-Held Meters
Digital Voltmeters
Digital Multimeters
Applications
Ordering Information
PART
MAX1491CAI
MAX1491CNI
MAX1493CCJ
MAX1495CCJ
TEMP
RANGE
PIN-
PACKAGE
0°C to +70°C 28 SSOP
0°C to +70°C 28 DIP
0°C to +70°C 32 TQFP
0°C to +70°C 32 TQFP
RESOLUTION
(DIGITS)
3.5
3.5
4.5
4.5
Features
High Resolution
MAX1495: 4.5 Digits (±19,999 Count)
MAX1493: 4.5 Digits (±19,999 Count)
MAX1491: 3.5 Digits (±1999 Count)
Sigma-Delta ADC Architecture
No Integrating Capacitors Required
No Autozeroing Capacitors Required
>100dB of Simultaneous 50Hz and 60Hz Rejection
Operate from a Single 2.7V or 5.25V Supply
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
Low Power: Maximum 980µA Operating Current
Small 32-Pin 7mm 7mm TQFP Package (4.5
Digits), 28-Pin SSOP Package (3.5 Digits), and 28-
Pin DIP Package (3.5 Digits)
Triplexed LCD Driver
Evaluation Kit Available (Order MAX1494EVKIT)
Pin Configurations
TOP VIEW
AVDD 1
AIN+ 2
AIN- 3
REF- 4
REF+ 5
LOWBATT 6
RANGE 7
DPSET1 8
32 31 30 29 28 27 26 25
MAX1493
MAX1495
24 SEG13
23 SEG12
22 SEG11
21 SEG10
20 SEG9
19 SEG8
18 SEG7
17 SEG6
9 10 11 12 13 14 15 16
TQFP
Pin Configurations continued at end of data sheet.
________________________________________________________________ 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.







No Preview Available !

MAX1495 Даташит, Описание, Даташиты
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
ABSOLUTE MAXIMUM RATINGS
AVDD to GND............................................................-0.3V to +6V
DVDD to GND ...........................................................-0.3V to +6V
AIN+, AIN- to GND ...............................VNEG to + (AVDD + 0.3V)
REF+, REF- to GND..............................VNEG to + (AVDD + 0.3V)
LOWBATT to GND ...................................-0.3V to (AVDD + 0.3V)
INTREF, RANGE, DPSET1, DPSET2, PEAK,
HOLD to GND ......................................-0.3V to (DVDD + 0.3V)
DPON to GND..........................................-0.3V to (DVDD + 0.3V)
VNEG to GND ...........................................-2.6V to (AVDD + 0.3V)
Maximum Current into Any 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 DIP (derate 14.3mW/°C above +70°C) ........1142.9mW
Operating Temperature Range...............................0°C to +70°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 = +2.7V to +5.25V, GND = 0, VREF+ - VREF- = 2.048V (external reference), CNEG= 0.1µF. All specifications are TMIN
to TMAX, unless otherwise noted. Typical values are at +25°C, unless otherwise noted.)
PARAMETER
DC ACCURACY
Noise-Free Resolution
Integral Nonlinearity (Note 1)
SYMBOL
CONDITIONS
MAX1493/MAX1495
MAX1491
2.000V range
INL
200mV range
MIN TYP MAX UNITS
-19,999
-1999
+19,999
Count
+1999
±1
Count
±1
Range Change Accuracy
(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
Output Noise
Offset Error (Zero Input Reading)
Gain Error
Offset VIN = 0 (Note 2)
(Note 3)
Offset Drift (Zero Reading Drift)
VIN = 0
Gain Drift
INPUT CONVERSION RATE
Conversion Rate
ANALOG INPUTS (AIN+, AIN-) (bypass to GND with 0.1µF or greater capacitors)
AIN Input Voltage Range
Differential (Note 4)
RANGE = GND
RANGE = DVDD
Absolute GND referenced
-0
-0.5
-2.0
-0.2
-2.2V
±1.0
10
0.1
±1
5
Count
+0
+0.5
µVP-P
Reading
%FSR
µV/°C
ppm/°C
Hz
+2.0
+0.2
+2.2V
V
Normal Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100 dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
Common-Mode Rejection
Input Leakage Current
Input Capacitance
Dynamic Input Current
CMR
CMR
For 50Hz ±2% and 60Hz ±2%,
RSOURCE < 10k
At DC
TA = +25°C
(Note 5)
150
100
10
10
-20 +20
dB
dB
nA
pF
nA
2 _______________________________________________________________________________________







No Preview Available !

MAX1495 Даташит, Описание, Даташиты
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
ELECTRICAL CHARACTERISTICS (continued)
(AVDD = DVDD = +2.7V to +5.25V, GND = 0, VREF+ - VREF- = 2.048V (external reference), CNEG= 0.1µF. All specifications are TMIN
to TMAX, unless otherwise noted. Typical values are at +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP
LOW-BATTERY VOLTAGE MONITOR (LOWBATT)
LOWBATT Trip Threshold
2.048
LOWBATT Leakage Current
10
Hysteresis
20
INTERNAL REFERENCE (REF- = GND, INTREF = DVDD, bypass REF+ to GND with 4.7µF capacitors)
REF Output Voltage
VREF AVDD = 5V, TA = +25°C
2.007 2.048
REF Output Short-Circuit Current
TA = +25°C
1
REF Output Temperature
Coefficient
TCVREF AVDD = 5V
40
MAX UNITS
V
pA
mV
2.089
V
mA
ppm/°C
Load Regulation
ISOURCE = 0µA to 300µA,
ISINK = 0µA to 30µA, TA = +25°C (Note 6)
6
Line Regulation
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-)
Absolute GND referenced
2.048
-2.2
+2.2
mV/µA
µV/V
µVp-p
V
Normal-Mode 50Hz and 60Hz
Rejection (Simultaneously)
50Hz and 60Hz ±2%
100 dB
Common-Mode 50Hz and 60Hz
Rejection (Simultaneously)
CMR
For 50Hz ±2% and 60Hz ±2%,
RSOURCE < 10k
Common-Mode Rejection
CMR At DC
Input Leakage Current
Input Capacitance
TA = +25°C
Dynamic Input Current
(Note 5)
CHARGE PUMP
Output Voltage
VNEG
DIGITAL INPUTS (INTREF, RANGE, PEAK, HOLD, DPSET1, DPSET2, DPON)
Input Current
IIN VIN = 0 or DVDD
Input Low Voltage
VINL
150
100
10
10
-20 +20
-2.6 -2.42
-2.3
-10 +10
0.3 x
DVDD
dB
dB
nA
pF
nA
V
µA
V
Input High Voltage
Input Hysteresis
VINH
VHYS
DVDD = 3.0V
0.7 x
DVDD
200
V
mV
_______________________________________________________________________________________ 3










Всего страниц 25 Pages
Скачать PDF[ MAX1495.PDF Даташит ]

Ссылка Поделиться


Related Datasheets

Номер в каталогеОписаниеПроизводители
MAX149+2.7V to +5.25V / Low-Power / 8-Channel / Serial 10-Bit ADCsMaxim
Maxim
MAX14900EOctal Power SwitchMaxim Integrated
Maxim Integrated
MAX1490AComplete / Isolated RS-485/RS-422 Data InterfaceMaxim
Maxim
MAX1490BComplete / Isolated RS-485/RS-422 Data InterfaceMaxim
Maxim

Номер в каталоге Описание Производители
6MBP200RA-060

Intelligent Power Module

Fuji Electric
Fuji Electric
ADF41020

18 GHz Microwave PLL Synthesizer

Analog Devices
Analog Devices
AN-SY6280

Low Loss Power Distribution Switch

Silergy
Silergy

DataSheet26.com    |    2020    |   Контакты    |    Поиск