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參數資料
| 型號： | MAX1499ECJ+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 7/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 3 1/2DIG W/LED DVR 32TQFP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 250 |
| 位數： | 3.5 位 |
| 采樣率（每秒）： | 5 |
| 數據接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 轉換器數目： | 1 |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-LQFP |
| 供應商設備封裝： | 32-LQFP（7x7） |
| 包裝： | 管件 |
| 輸入數目和類型： | 1 個差分，雙極 |
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MAX1497/MAX1499
3.5- and 4.5-Digit, Single-Chip ADCs with LED
Drivers and C Interface
______________________________________________________________________________________
15
Leading-Zero Suppression
The MAX1497/MAX1499 include a leading-zero sup-
pression circuitry to turn off unnecessary zeros. For
example, when DPSET1 and DPSET2 = [0,0], 0.0 is dis-
played instead of 000.0. This feature saves a substan-
tial amount of power from being wasted.
Interdigit Blanking
The MAX1497/MAX1499 also include an interdigit
blanking circuitry. Without this feature, it is possible to
see a faint digit next to a digit that is completely on. The
interdigit blanking circuitry prevents bleeding over into
the next digit for a short period of time. The typical
interdigit blanking time is 4s.
Reference
The MAX1497/MAX1499 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
the RANGE bit equal to zero. With the RANGE bit set to
one, the full-scale range is ±200mV. A decreased refer-
ence voltage decreases full-scale range (see the
Transfer Functions section).
The MAX1497/MAX1499 accept either an external ref-
erence or an internal reference. The INTREF bit selects
the reference mode (see the Control Register
(Read/Write) section).
For internal reference operation, set the INTREF bit to
one, connect REF- to GND, and bypass REF+ to GND
with a 4.7F capacitor. The internal reference provides
a nominal 2.048V source between REF+ and GND. The
internal reference temperature coefficient is typically
40ppm/°C.
The default power-on state sets the MAX1497/
MAX1499 to use the external reference with the INTREF
bit cleared to zero. The external reference inputs, REF+
and REF-, are fully differential. For a valid external refer-
ence input, VREF+ must be greater than VREF-. Bypass
REF+ and REF- with a 0.1F or greater capacitor to
GND in external reference mode.
Figure 16 shows the MAX1497/MAX1499 operating with
an external single-ended reference. In this mode, REF-
is connected to GND and REF+ is driven with an exter-
nal 2.048V reference. Bypass REF+ to GND with a
0.47F capacitor.
1
43210432
04
T
TON
DIGIT 4 (MSD)
DIGIT 3
DIGIT 2
DIGIT 1
DIGIT 0 (LSD)
DATA
MSD
LSD
Figure 6. LED Voltage Waveform—MAX1499
3
32103210
21
T
TON
DIGIT 3 (MSD)
DIGIT 2
DIGIT 1
DIGIT 0 (LSD)
DATA
MSD
LSD
Figure 7. LED Voltage Waveform—MAX1497
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX1499ECJ+ | 功能描述:模數轉換器 - ADC 4.5 Digit ADC w/LED 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 |
| MAX1499ECJ+T | 功能描述:模數轉換器 - ADC 4.5 Digit ADC w/LED 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 |
| MAX1499ECJ-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 |
| MAX1499EVC16 | 功能描述:模數轉換器 - ADC 3.5- and 4.5-Digit Single-Chip ADCs with LED Drivers and uC Interface 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 |
| MAX1499EVKIT | 功能描述:數據轉換 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX1499 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 |
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