- 您現(xiàn)在的位置：買賣IC網 > PDF目錄224187 > MAX1493CCJ+ (MAXIM INTEGRATED PRODUCTS INC) 3.5- and 4.5-Digit, Single-Chip ADCs with LCD Drivers PDF資料下載
參數資料
| 型號： | MAX1493CCJ+ |
| 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, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, MO-136BC, TQFP-32 |
| 文件頁數： | 9/25頁 |
| 文件大?。?/td> | 484K |
| 代理商： | MAX1493CCJ+ |
MAX1491/MAX1493/MAX1495
3.5- and 4.5-Digit, Single-Chip
ADCs with LCD Drivers
______________________________________________________________________________________
17
If ghosting is present on the LCD, the RMS OFF voltage
is too high. Choose an LCD with a higher RMS OFF
voltage or decrease DVDD.
Decimal Point Control
The MAX1491/MAX1493/MAX1495 allow for full deci-
mal-point control and feature leading-zero suppression.
Use DPON, DPSET1, and DPSET2 to set the value of
the decimal point. Tables 2 and 3 show the truth tables
of the DPON, DPSET1, and DPSET2 that determine
which decimal point is used.
Reference
The MAX1491/MAX1493/MAX1495 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 equal to GND. With RANGE equal to
DVDD, the full-scale range is ±200mV. A decreased ref-
erence voltage decreases full-scale range (see the
Transfer Functions section).
The MAX1491/MAX1493/MAX1495 accept either an
external reference or an internal reference. The INTREF
input selects the reference mode.
For internal reference operation, connect INTREF to
DVDD, connect REF- to GND, and bypass REF+ to
GND with a 4.7F capacitor. The internal reference pro-
vides a nominal 2.048V source between REF+ and
GND. The internal reference temperature coefficient is
typically 40ppm/°C.
Connect INTREF to GND to use the external reference.
The external reference inputs, REF+ and REF-, are fully
differential. For a valid external reference input, VREF+
must be greater than VREF-. Bypass REF+ and REF-
with a 0.1F or greater capacitor to GND in external ref-
erence mode.
Figure 13 shows the MAX1493/MAX1495 operating with
an external differential reference. In this mode, REF- is
connected to the top of the strain gauge and REF+ is
connected to the midpoint of the resistor-divider on the
supply.
Applications Information
Power-On
At power-on, the digital filter and modulator circuits
reset. The MAX1493/MAX1495 allow 6s for the refer-
ence to stabilize before performing enhanced offset
calibration. During these 6s, the MAX1493/MAX1495
display 1.2V to 1.5V when a stable reference is detect-
ed. If a valid reference is not found, the MAX1493/
MAX1495 time out after 6s and begin enhanced offset
calibration. Enhanced offset calibration typically lasts
2s. The MAX1493/MAX1495 begin converting after
enhanced offset calibration.
Offset Calibration
The MAX1491/MAX1493/MAX1495 offer on-chip offset
calibration. The MAX1491/MAX1493/MAX1495 calibrate
offset during every conversion cycle. The MAX1495
Table 2. Decimal-Point Control Table (MAX1493/MAX1495)
DPON
DPSET1
DPSET2
DISPLAY OUTPUT
ZERO INPUT READING
0
1 8 8 8 8
0
1
1 8 8 8 8
0
1
0
1 8 8 8 8
0
1
1 8 8 8 8
0
1
0
1 8 8 8.8
0.0
1
0
1
1 8 8.8 8
0.00
1
0
1 8.8 8 8
0.000
1
1.8 8 8 8
0.0000
Table 3. Decimal-Point Control Table (MAX1491)
DPSET1
DPSET2
DISPLAY OUTPUT
ZERO INPUT READING
0
1 8 8.8
0.0
0
1
1 8.8 8
0.00
1
0
1.8 8 8
0.000
1
1 8 8 8
000
相關PDF資料 |
PDF描述 |
|---|---|
| MAX1510ETB+ | Low-Voltage DDR Linear Regulator |
| MAX151BEWG+T | 300kHz, 10-Bit ADC with Reference and Track/Hold |
| MAX151BCWG+T | 300kHz, 10-Bit ADC with Reference and Track/Hold |
| MAX151BCNG+ | 300kHz, 10-Bit ADC with Reference and Track/Hold |
| MAX151BCWG+ | 300kHz, 10-Bit ADC with Reference and Track/Hold |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| MAX1493CCJ-T | 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 |
| MAX1493EVKIT+ | 功能描述:數據轉換 IC 開發(fā)工具 MAX1493 Eval Kit RoHS:否 制造商:Texas Instruments 產品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
| MAX1494CCJ | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。