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參數(shù)資料
| 型號： | MAX1497 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 3.5- and 4.5-Digit. Single-Chip ADCs with LED Drivers and 礐 Interface |
| 中文描述： | 3位半和4位半、單片ADC，帶有LED驅(qū)動器和µC接口 |
| 文件頁數(shù)： | 1/33頁 |
| 文件大?。?/td> | 665K |
| 代理商： | MAX1497 |
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General Description
The MAX1497/MAX1499 low-power, 3.5- and 4.5-digit,
analog-to-digital converters (ADCs) with integrated light-
emitting diode (LED) drivers operate from a single 2.7V
to 5.25V power supply. They include an internal refer-
ence, a high-accuracy on-chip oscillator, and a multi-
plexed 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
and/or to a microcontroller (μC). Microcontroller
communication is possible through an SPI-/QSPI-
/MICROWIRE-compatible serial interface. The
MAX1497 is a 3.5-digit (±1999 count) device and the
MAX1499 is a 4.5-digit (±19,999 count) device.
The MAX1497/MAX1499 do not require external preci-
sion integrating capacitors, autozero 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 dif-
ferential signal and reference inputs, 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,
overrange and underrange detection, and a user-pro-
grammable low-battery monitor.
The MAX1499 is available in a 32-pin, 7mm
7mm
TQFP package and the MAX1497 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 tem-
perature range.
Applications
Digital Panel Meters
Hand-Held Meters
Digital Voltmeters
Digital Multimeters
Features
High Resolution
MAX1499: 4.5 Digits (±19,999 Count)
MAX1497: 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 (Exclude LED Driver Current)
Maximum 664μA Operating Current
Maximum 268μA Shutdown 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)
Multiplexed LED Drivers
Resistor-Programmable Segment Current
SPI-/QSPI-/MICROWIRE-Compatible Serial
Interface
Extended Temperature Range (-40°C to +85°C)
M
3.5- and 4.5-Digit, Single-Chip ADCs with LED
Drivers and μC Interface
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-3054; Rev 1a; 2/04
PART
TEMP RANGE
PIN-
PACKAGE
RESOLUTION
(DIGITS)
MAX1497
EAI*
MAX1497EPI
MAX1499
ECJ
*
Future product—contact factory for availability.
-40
°
C to +85
°
C 28 SSOP
-40
°
C to +85
°
C 28 PDIP
-40
°
C to +85
°
C 32 TQFP
3.5
3.5
4.5
Pin Configurations appear at end of data sheet.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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| MAX1497EAI | 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers and レC Interface |
| MAX1499ECJ | 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers and レC Interface |
| MAX15004 | 4.5V to 40V Input Automotive Flyback/Boost/SEPIC Power-Supply Controllers |
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