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參數資料
| 型號： | MAX1492CNI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers |
| 中文描述： | 1-CH DELTA-SIGMA ADC, PDIP28 |
| 封裝： | 0.300 INCH, MO-058, PDIP-28 |
| 文件頁數： | 1/35頁 |
| 文件大?。?/td> | 748K |
| 代理商： | MAX1492CNI |
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General Description
The MAX1492/MAX1494 low-power, 3.5- and 4.5-digit,
analog-to-digital converters (ADCs) with integrated liquid
crystal display (LCD) 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 triplexed
LCD driver. An internal charge pump generates the neg-
ative supply needed to power the integrated input buffer
for single-supply operation. The ADC is configurable for
either a ±2V or ±200mV input range and outputs its con-
version results to an LCD and/or to a microcontroller
(μC). μC communication is facilitated through an
SPI-/QSPI-/MICROWIRE-compatible serial inter-
face. The MAX1492 is a 3.5-digit (±1999 count) device,
and the MAX1494 is a 4.5-digit (±19,999 count) device.
The MAX1492/MAX1494 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 simultaneous rejection of 50Hz and 60Hz
line noise. Other features include data hold and peak
hold, overrange and underrange detection, and a low-
battery monitor.
The MAX1494 comes in a 32-pin, 7mm x 7mm TQFP
package, and the MAX1492 comes in 28-pin SSOP and
28-pin PDIP packages. All devices in this family operate
over the 0°C to +70°C commercial temperature range.
Applications
Digital Panel Meters
Hand-Held Meters
Digital Voltmeters
Digital Multimeters
Features
o
High Resolution
MAX1494: 4.5 Digits (±19,999 Count)
MAX1492: 3.5 Digits (±1999 Count)
o
Sigma-Delta ADC Architecture
No Integrating Capacitors Required
No Autozeroing Capacitors Required
>100dB of Simultaneous 50Hz and 60Hz
Rejection
o
Operate from a Single 2.7V or 5.25V Supply
o
Selectable Input Range of ±200mV or ±2V
o
Selectable Voltage Reference: Internal 2.048V
or External
o
Internal High-Accuracy Oscillator Needs No
External Components
o
Automatic Offset Calibration
o
Low Power
Maximum 960μA Operating Current
Maximum 400μA Shutdown Current
o
Small 32-Pin 7mm x 7mm TQFP Package
(4.5 Digits), 28-Pin SSOP Package (3.5 Digits)
o
Triplexed LCD Driver
o
SPI-/QSPI-/MICROWIRE-Compatible Serial
Interface
o
Evaluation Kit Available (Order MAX1494EVKIT)
M
3.5- and 4.5-Digit, Single-Chip ADCs
with LCD Drivers
________________________________________________________________
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
19-2959; Rev 3; 5/04
EVALUATION KIT
AVAILABLE
PART
TEMP
RANGE
PIN-
PACKAGE
RESOLUTION
(DIGITS)
MAX1492
CAI
MAX1492CNI
MAX1494
CCJ
0
°
C to +70
°
C
0
°
C to +70
°
C
0
°
C to +70
°
C
28 SSOP
28 PDIP
32 TQFP
3.5
3.5
4.5
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Pin Configurations appear at end of data sheet.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1492CNI+ | 功能描述:模數轉換器 - ADC 3.5 Digit ADC w/LCD Drivers RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX14934AAWE+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX1493CCJ | 功能描述:模數轉換器 - ADC RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1493CCJ+ | 功能描述:模數轉換器 - ADC 4.5 Digit ADC w/LCD Drivers RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1493CCJ+T | 功能描述:模數轉換器 - ADC 4.5 Digit ADC w/LCD Drivers RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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