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參數(shù)資料
| 型號(hào)： | MX674AJCWI+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 6/18頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT W/REF 28-SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 66k |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 265mW |
| 電壓電源： | 雙 ± |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC W |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 2 個(gè)單端，單極；2 個(gè)單端，雙極 |
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Maxim Integrated Products 14
MAX174/MX574A/MX674A
Industry-Standard, Complete 12-Bit ADCs
Figure 11. MAX174 to HA5320 Sample-and-Hold Interface
Unipolar Input Operation
The unipolar transfer function and input connections are
shown in Figures 12 and 13.
Because all internal resistors of the MAX174/MX574A/
MX674A are trimmed for absolute calibration, additional
trimming is not necessary for most applications. The
absolute accuracy for each grade is given in the speci-
fication tables.
If the offset trim is not needed, BIPOFF can be tied direct-
ly to AGND. The two resistors and trimmer for BIPOFF
can then be discarded. A 50ω ±1% metal film resistor
should be attached between REFOUT and REFIN.
For a 0 to +10V input range, the analog input is con-
nected between AGND and 10VIN. For a 0 to +20V input
range, the analog input is connected between AGND
and 20VIN. These ADCs can easily handle an input signal
beyond the supplies. If full-scale trim is not needed, the
gain trimmer, R2, should be swapped with a 50ω resis-
tor. Should a 10.24V input range be selected, a 200ω
trimmer should be inserted in series with 10VIN. For a full-
scale input range of 20.48V, use a 500ω trimmer in series
with 20VIN. The nominal input impedance into 10VIN is
5kω and 10kω for 20VIN.
Offset and Full-Scale Adjustment
In applications where the offset and full-scale range
have to be adjusted, use the circuit shown in Figure 12.
The offset should be adjusted first. Apply 1/2 LSB at the
analog input and adjust R1 until the digital output code
flickers between 0000 0000 0000 and 0000 0000 0001.
To adjust the full-scale range, apply FS - 3/2 LSB at the
analog input and adjust R2 until the output code changes
between 1111 1111 1110 and 1111 1111 1111.
Bipolar Input Operation
The bipolar transfer function is shown in Figure 14, and
input connections are shown in Figure 15. One or both
of the trimmers can be exchanged with a 50ω ±1% fixed
resistor if the offset and gain specifications suffice.
Offset and Full-Scale Adjustment
To begin bipolar calibration, a signal 1/2 LSB above neg-
ative full-scale is applied. R1 is trimmed until the digital
output flickers between 0000 0000 0000 and 0000 0000
0001. Next, a signal 3/2 LSB below positive full scale
is applied. Then, R2 is trimmed until the output flickers
between 1111 1111 1110 and 1111 1111 1111.
STS
20VIN
10VIN
BIPOFF
REFOUT
REFIN
-VS
VCC
+VIN
*ADDITIONAL PINS OMITTED FOR CLARITY
GND
0.1F
ANALOG
INPUT
-15V
4.7F
AGND
DGND
S/H
VOUT
-VIN
50I
+15V
4.7F
0.1F
VEE
-15V
4.7F
0.1F
VL
+5V
4.7F
0.1F
HA5320*
CONTROL
INPUTS
+VS
+15V
4.7F
0.1F
MAX174*
D0 –11
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MX674AJD | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit Precision 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 |
| MX674AJEPI | 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 |
| MX674AJEPI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit Precision 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 |
| MX674AJEWI | 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 |
| MX674AJEWI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit Precision 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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