參數(shù)資料
型號： MAX1174BEUP+
廠商： Maxim Integrated Products
文件頁數(shù)： 15/15頁
文件大小： 0K
描述： IC ADC 14BIT 135KSPS 20-TSSOP
標(biāo)準(zhǔn)包裝： 74
位數(shù)： 14
采樣率（每秒）： 135k
數(shù)據(jù)接口： 并聯(lián)
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 879mW
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： 20-TSSOP（0.173"，4.40mm 寬）
供應(yīng)商設(shè)備封裝： 20-TSSOP
包裝： 管件
輸入數(shù)目和類型： 1 個單端，雙極
Selecting Standby or Shutdown Mode
The MAX1156/MAX1158/MAX1174 have a selectable
standby or low-power shutdown mode. In standby
mode, the ADC’s internal reference and reference
buffer do not power down between conversions, elimi-
nating the need to wait for the reference to power up
before performing the next conversion. Shutdown mode
powers down the reference and reference buffer after
completing a conversion. The reference and reference
buffer require a minimum of 12ms (CREFADJ = 0.1F,
CREF = 10F) to power up and settle from shutdown.
The state of R/C at the second falling edge of CS
selects which power-down mode the MAX1156/
MAX1158/MAX1174 enter upon conversion completion.
Holding R/C low causes the MAX1156/MAX1158/
MAX1174 to enter standby mode. The reference and
buffer are left on after the conversion completes. R/C
high causes the MAX1156/MAX1158/MAX1174 to enter
shutdown mode and power down the reference and
buffer after conversion (see Figures 5 and 6). Set the
voltage at R/C high during the second falling edge of
CS to realize the lowest current operation.
Standby Mode
While in standby mode, the supply current is less than
3.7mA (typ). The next falling edge of CS with R/C low
causes the MAX1156/MAX1158/MAX1174 to exit stand-
by mode and begin acquisition. The reference and ref-
erence buffer remain active to allow quick turn-on time.
Shutdown Mode
In shutdown mode, the reference and reference buffer
are shut down between conversions. Shutdown mode
reduces supply current to 0.5A (typ) immediately after
the conversion. The next falling edge of CS with R/C
low causes the reference and buffer to wake up and
enter acquisition mode. To achieve 14-bit accuracy,
allow 12ms (CREFADJ = 0.1F, CREF = 10F) for the
internal reference to wake up.
Internal and External Reference
Internal Reference
The internal reference of the MAX1156/MAX1158/
MAX1174 is internally buffered to provide +4.096V out-
put at REF. Bypass REF to AGND and REFADJ to
AGND with 10F and 0.1F, respectively. Sink or
source current at REFADJ to make fine adjustments to
the internal reference. The input impedance of REFADJ
is nominally 5k
. Use the circuit of Figure 7 to adjust
the internal reference to ±1.5%.
MAX1156/MAX1158/MAX1174
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
9
S1, S2 = T/H SWITCH
S3 = POWER-DOWN
(MAX1158/MAX1174 ONLY)
S2
S1
AIN
R1
3.4k
R3
R2
REF
T/H OUT
HOLD
TRACK
R2 = 7.85k
(MAX1158)
OR 3.92k
(MAX1156/MAX1174)
R3 = 5.45k
(MAX1158)
OR 17.79k
(MAX1156/MAX1174)
CHOLD
30pF
S3
POWER-
DOWN
161
MAX1158/MAX1174
S2
S1
AIN
R1
3.4k
R3
R2
T/H OUT
HOLD
TRACK
CHOLD
30pF
161
MAX1156
Figure 4. Equivalent Input Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1174BEUP+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 135ksps 4.2V 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
MAX1174BEUP+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 135ksps 4.2V 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
MAX1174BEUP-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
MAX1175ACUI 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
MAX1175ACUI+ 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
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