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參數(shù)資料
| 型號： | MAX1447ECJ |
| 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 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 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 907K |
| 代理商： | MAX1447ECJ |
M
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
14
______________________________________________________________________________________
Decimal-Point Control
The MAX1447/MAX1496/MAX1498 allow for full deci-
mal-point control and feature leading-zero suppression.
Use the DPON, DPSET1, and DPSET2 bits in the con-
trol register to set the value of the decimal point (Tables
2 and 3). The MAX1447/MAX1496/MAX1498 overrange
and underrange display is shown in Table 4.
Leading-Zero Suppression
The MAX1447/MAX1496/MAX1498 include a leading-
zero suppression circuitry to turn off unnecessary zeros.
For example, when DPSET1 and DPSET2 = [0,0], 0.0 is
displayed instead of 000.0. This feature saves a substan-
tial amount of power from being wasted.
Interdigit Blanking
The MAX1447/MAX1496/MAX1498 also include an
interdigit blanking circuitry. Without this feature, it is
possible to see a faint digit next to a digit that is com-
pletely on. The interdigit blanking circuitry prevents
bleeding over into the next digit for a short period of
time. The typical interdigit blanking time is 4μs.
Reference
The MAX1447/MAX1496/MAX1498 reference sets the
full-scale range of the ADC transfer function. With a
nominal 2.048V reference, the ADC full-scale range is
±2V with RANGE = GND. With RANGE = DV
DD
(MAX1447/MAX1498) or V
DD
(MAX1496), the full-scale
range is ±200mV. A decreased reference voltage
decreases full-scale range (see the
Transfer Functions
section).
The MAX1447/MAX1496/MAX1498 accept either an
external reference or an internal reference (INTREF).
The INTREF logic selects the reference mode.
For internal-reference operation, set INTREF to DV
DD
(MAX1447/MAX1498) or V
DD
(MAX1496), connect REF-
to GND, and bypass REF+ to GND with a 4.7μF capaci-
tor. The internal reference provides a nominal 2.048V
source between REF+ and GND. The internal-reference
temperature coefficient is typically 40ppm/°C.
Table 2. Decimal-Point Control Table—MAX1447/MAX1498
DPON
0
0
0
0
1
1
1
1
DPSET1
0
0
1
1
0
0
1
1
DPSET2
0
1
0
1
0
1
0
1
DISPLAY OUTPUT
18888
18888
18888
18888
1888.8
188.88
18.888
1.8888
ZERO INPUT READING
0
0
0
0
0.0
0.00
0.000
0.0000
Table 3. Decimal-Point Control Table—MAX1496
DPSET1
0
0
1
1
X
= Don’t care.
DPSET2
0
1
0
1
DISPLAY OUTPUT
188.8
18.88
1888
1.888
ZERO INPUT READING
0.0
0.00
0
0.000
Table 4. LED During Overrange and
Underrange Conditions
CONDITION
Overrange
Underrange
MAX1496
1
---
-
1
---
MAX1447/MAX1498
1
----
-
1
----
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|---|---|
| MAX1447ECJ+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5-Digit 5sps 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1447ECJ+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 4.5-Digit 5sps 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1447ECJ-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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1448EHJ | 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1448EHJ+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 80Msps 3V High Speed 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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