參數(shù)資料
型號(hào)： MAX1498ECJ
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： ADC
英文描述： 3.5- and 4.5-Digit, Single-Chip ADCs with LED Drivers
中文描述： 1-CH PROPRIETARY METHOD ADC, PQFP32
封裝： 7 X 7 MM, 1.40 MM HEIGHT, MO-136, TQFP-32
文件頁(yè)數(shù)： 10/24頁(yè)
文件大小： 907K
代理商： MAX1498ECJ
M
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
10
______________________________________________________________________________________
Detailed Description
The MAX1447/MAX1496/MAX1498 low-power, highly
integrated ADCs with LED drivers convert a ±2V differ-
ential input voltage (one count is equal to 100μV for the
MAX1447/MAX1498 and 1mV for the MAX1496) with a
sigma-delta ADC and output the result to an LED. An
additional ±200mV input range (one count is equal to
10μV for the MAX1447/MAX1498 and 100μV for the
MAX1496) is available to measure small signals with
increased resolution.
The devices operate from a single 2.7V to 5.25V power
supply and offer 3.5-digit (MAX1496) or 4.5-digit
(MAX1447/MAX1498) conversion results. An internal
2.048V reference, internal charge pump, and a high-accu-
racy on-chip oscillator eliminate external components.
The devices also feature on-chip buffers for the differen-
tial input signal and external-reference inputs, allowing
direct interface with high-impedance signal sources. In
addition, they use continuous internal offset-calibration
and offer >100dB of 50Hz and 60Hz line-noise rejec-
tion. Other features include data hold and peak detec-
tion and overrange/underrange detection.
Analog Input Protection
Internal protection diodes limit the analog input range
from VNEG to (AV
DD
+ 0.3V) for the MAX1447/
MAX1498, and from VNEG to (V
DD
+ 0.3V) for the
MAX1496. If the analog input exceeds this range, limit
the input current to 10mA.
Internal Analog Input/Reference Buffers
The MAX1447/MAX1496/MAX1498 analog input/refer-
ence buffers allow the use of high-impedance signal
sources. The input buffers’ common-mode input range
allows the analog inputs and the reference to range from
-2.2V to +2.2V.
Pin Description (continued)
PIN
MAX1496
MAX1447/
MAX1498
NAME
FUNCTION
19
20
21
22
23
24
18
20
21
22
23
24
DIG3
SEGA
SEGB
SEGC
SEGD
SEGE
Digit 3 Driver
Segment A Driver
Segment B Driver
Segment C Driver
Segment D Driver
Segment E Driver
25
25
VLED
LED Display Segment Driver Supply. Connect to a +2.7V to +5.25V supply. Bypass with a
0.1μF capacitor to GLED.
26
27
28
26
27
28
SEGF
SEGG
SEGDP
Segment F Driver
Segment G Driver
Segment DP Driver
—
6
AV
DD
Analog Positive Supply Voltage. Connect AV
DD
to a +2.7V to +5.25V power supply. Bypass
AV
DD
to GND with a 0.1μF capacitor.
—
7
DV
DD
Digital Positive Supply Voltage. Connect DV
DD
to a +2.7V to +5.25V power supply. Bypass
DV
DD
to GND with a 0.1μF capacitor.
Digit 4 Driver
—
19
DIG4
—
29
LED_EN
Active-High LED Enable. The MAX1447/MAX1498 display driver turns off when the LED_EN
is driven to logic low. The MAX1447/MAX1498 LED display driver turns on when LED_EN is
driven to logic high.
—
30
DPON
Decimal-Point Enable Input. Controls the decimal point of the LED. See the
Decimal-Point
Control
section. Connect to DV
DD
(MAX1447/MAX1498) or V
DD
(MAX1496) to enable the
decimal point.
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參數(shù)描述
MAX1498ECJ+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5 Digit ADC w/LED Drivers RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1498ECJ+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5 Digit ADC w/LED Drivers RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1498ECJ-T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX14998ETO+ 功能描述:模擬開(kāi)關(guān) IC 4Ch DisplayPort MUX RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16
MAX14998ETO+T 功能描述:模擬開(kāi)關(guān) IC 4Ch DisplayPort MUX RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)數(shù)量:2 開(kāi)關(guān)配置:SPDT 開(kāi)啟電阻（最大值）:0.1 Ohms 切換電壓（最大）: 開(kāi)啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 工作電源電壓:2.7 V to 4.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-16
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