參數(shù)資料
型號(hào)： MAX1496EAI+
廠商： Maxim Integrated Products
文件頁數(shù)： 8/24頁
文件大?。?/td> 0K
描述： IC ADC 3.5DIGIT LED DRVR 28-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 46
位數(shù)： 3.5 位
采樣率（每秒）： 5
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： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 管件
輸入數(shù)目和類型： 1 個(gè)差分，雙極
產(chǎn)品目錄頁面： 1397 (CN2011-ZH PDF)
MAX1447/MAX1496/MAX1498
3.5- and 4.5-Digit, Single-Chip ADCs
with LED Drivers
16
______________________________________________________________________________________
Hold
The MAX1447/MAX1496/MAX1498 feature data-hold
circuitry. When activated (HOLD is set to AVDD for the
MAX1447/MAX1498 or to VDD for the MAX1496), the
device holds the current reading on the LED.
Strain-Gauge Measurement
Connect the differential inputs of the MAX1447/
MAX1496/MAX1498 to the bridge network of the strain
gauge. In Figure 8, the analog supply voltage powers
the bridge network and the MAX1447/MAX1496/
MAX1498, along with the reference voltage. The
MAX1447/MAX1496/MAX1498 handle an analog input
voltage range of ±200mV and ±2V full scale. The ana-
log/reference inputs of the parts allow the analog input
range to have an absolute value of anywhere between
-2.2V and +2.2V.
Thermocouple Measurement
Figure 9 shows a connection from a thermocouple to
the MAX1447/MAX1496/MAX1498. In this application,
the MAX1447/MAX1496/MAX1498 take advantage of
the on-chip input buffers that allow large source imped-
ances on the front end. The decoupling capacitors
reduce noise pickup from the thermocouple leads. To
place the differential voltage from the thermocouple at
a suitable common-mode voltage, the AIN- input of the
MAX1447/MAX1496/MAX1498 is biased to GND. Use
an external temperature sensor, such as the DS75, and
a microcontroller to perform cold-junction temperature
compensation.
Transfer Functions
Figures 10–13 show the transfer functions of the
MAX1447/MAX1496/MAX1498.
The transfer function for the MAX1447/MAX1498 with
AIN+ - AIN-
≥ 0, RANGE = GND is:
The transfer function for the MAX1447/MAX1498 with
AIN+ - AIN- < 0, RANGE = GND is:
The transfer function for the MAX1447/MAX1498 with
AIN+ - AIN-
≥ 0, RANGE = DVDD is:
The transfer function for the MAX1447/MAX1498 with
AIN+ - AIN- < 0, RANGE = DVDD is:
COUNT
VV
AIN
REF
.
,
=×
×+
+
1 024
20 000
10
1
COUNT
VV
AIN
REF
.
,
=×
×
+
1 024
20 000
10
COUNT
VV
AIN
REF
.
,
=×
+
1 024
20 000
1
COUNT
VV
AIN
REF
.
,
=×
+
1 024
20 000
-2V
0
ANALOG INPUT VOLTAGE
+2V
-100
V 100V
LED
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
Figure 10. MAX1447/MAX1498 Transfer Function, ±2V Range
-200mV
0
ANALOG INPUT VOLTAGE
+200mV
-10
V
10
V
LED
1 - - - -
19,999
2
1
0
- 0
- 1
- 2
-19,999
- 1 - - - -
Figure 11. MAX1447/MAX1498 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
MAX1496EAI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3.5 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
MAX1496EAI+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3.5 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
MAX1496EAI-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
MAX1496EPI 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
MAX1496EPI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 3.5 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
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