參數(shù)資料
型號: MAX1499ECJ+
廠商: Maxim Integrated Products
文件頁數(shù): 19/33頁
文件大?。?/td> 0K
描述: IC ADC 3 1/2DIG W/LED DVR 32TQFP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 250
位數(shù): 3.5 位
采樣率(每秒): 5
數(shù)據(jù)接口: MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
電壓電源: 模擬和數(shù)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(yīng)商設(shè)備封裝: 32-LQFP(7x7)
包裝: 管件
輸入數(shù)目和類型: 1 個差分,雙極
MAX1497/MAX1499
3.5- and 4.5-Digit, Single-Chip ADCs with LED
Drivers and C Interface
26
______________________________________________________________________________________
Thermocouple Measurement
Figure 16 shows a connection from a thermocouple to
the MAX1497/MAX1499. In this application, the
MAX1497/MAX1499 take advantage of the on-chip
input buffers that allow large source impedances on the
front end. The decoupling capacitors reduce noise
pickup from the thermocouple leads. To place the dif-
ferential voltage from the thermocouple at a suitable
common-mode voltage, the AIN- input of the MAX1497/
MAX1499 is biased to GND. Use an external tempera-
ture sensor, such as the DS75, and a C to perform
cold-junction temperature compensation.
Transfer Functions
Figures 17–20 show the transfer functions of the
MAX1497/MAX1499. The output data is stored in the
ADC data register in two’s complement.
The transfer function for the MAX1499 with AIN+ - AIN-
≥ 0, RANGE = 0 is:
COUNTS
VV
AIN
REF
.
,
=
×
+
1 024
20 000
7CFh
002h
001h
000h
FFFh
FFEh
FFDh
830h
<830h
-200mV
0
ANALOG INPUT VOLTAGE
+200mV
ADC RESULT
LED
1 - - -
1999
2
1
0
- 0
- 1
- 2
-1999
- 1 - - -
-100V 100V
Figure 19. MAX1497 Transfer Function, ±200mV Range
>7CFh
7CFh
002h
001h
000h
FFFh
FFEh
FFDh
830h
<830h
-2V
0
ANALOG INPUT VOLTAGE
+2V
ADC RESULT
LED
1 - - -
1999
2
1
0
- 0
- 1
- 2
-1999
- 1 - - -
-1mV
1mV
Figure 20. MAX1497 Transfer Function, ±2V Range
>4E1Fh
4E1Fh
0002h
0001h
0000h
FFFFh
FFFEh
FFFDh
B1E0h
<B1E0h
-2V
0
ANALOG INPUT VOLTAGE
+2V
ADC RESULT
LED
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
-100V 100V
Figure 17. MAX1499 Transfer Function, ±2V Range
4E1Fh
0002h
00001h
0000h
FFFFh
FFFEh
FFFDh
B1E0h
<B1E0h
-200mV
0
ANALOG INPUT VOLTAGE
+200mV
ADC RESULT
LED
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
-10V
10V
Figure 18. MAX1499 Transfer Function, ±200mV Range
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1499ECJ+ 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
MAX1499ECJ+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
MAX1499ECJ-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
MAX1499EVC16 功能描述:模數(shù)轉(zhuǎn)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(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
MAX1499EVKIT 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX1499 RoHS:否 制造商:Texas Instruments 產(chǎn)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