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參數(shù)資料
| 型號(hào)： | 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)： | 17/24頁 |
| 文件大?。?/td> | 907K |
| 代理商： | MAX1447ECJ |
M
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
______________________________________________________________________________________
17
The transfer function for the MAX1496 with AIN+ - AIN-
≥
0, RANGE = GND is:
The transfer function for the MAX1496 with AIN+ - AIN-
< 0, RANGE = GND is:
The transfer function for the MAX1496 with AIN+ - AIN-
≥
0, RANGE = V
DD
is:
The transfer function for the MAX1496 with AIN+ - AIN-
< 0, RANGE = V
DD
is:
Supplies, Layout, and Bypassing
Power up AV
DD
and DV
DD
(MAX1447/MAX1498) and
V
DD
(MAX1496) before applying an analog input and
external-reference voltage to the device. If this is not
possible, limit the current into these inputs to 50mA.
When the analog and digital supplies come from the
same source, isolate the digital supply from the analog
supply with a low-value resistor (10
) or ferrite bead.
For best performance, ground the MAX1447/
MAX1496/MAX1498 to the analog ground plane of the
circuit board.
Avoid running digital lines under the device as this can
couple noise onto the IC. Run the analog ground plane
under the MAX1447/MAX1496/MAX1498 to minimize
coupling of digital noise. Make the power-supply lines
to the MAX1447/MAX1496/MAX1498 as wide as possi-
ble to provide low-impedance paths and reduce the
effects of glitches on the power-supply line.
Shield fast-switching signals, such as clocks, with digital
ground to avoid radiating noise to other sections of the
board. Avoid running clock signals near the analog
inputs. Avoid crossover of digital and analog signals.
Running traces that are on opposite sides of the board at
right angles to each other reduces feedthrough effects.
Good decoupling is important when using high-resolution
ADCs. Decouple the supplies with 0.1μF ceramic capaci-
tors to GND. Place these components as close to the
device as possible to achieve the best decoupling.
COUNT
V
V
V
V
AIN
REF
AIN
REF
1 024
×
×
+
=
+
+
2000
10
1
COUNT
V
V
V
V
AIN
REF
AIN
REF
1 024
×
×
=
+
+
2000
10
COUNT
V
V
V
V
AIN
REF
AIN
REF
1 024
×
+
=
+
+
2000
1
COUNT
V
V
V
V
AIN
REF
AIN
REF
1 024
=
×
+
+
2000
-200mV
0
ANALOG INPUT VOLTAGE
+200mV
-100
μ
V
100
μ
V
LED
1 - - -
1999
2
1
0
- 0
- 1
- 2
-1999
- 1 - - -
Figure 12. MAX1496 Transfer Function, ±200mV Range
-2V
0
ANALOG INPUT VOLTAGE
+2V
-1mV
1mV
LED
1 - - -
1999
2
1
0
- 0
- 1
- 2
-1999
- 1 - - -
Figure 13. MAX1496 Transfer Function, ±2V Range
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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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