buffer require a minimum of 12ms (CREFADJ
參數(shù)資料
型號: MAX1187CCUI+T
廠商: Maxim Integrated Products
文件頁數(shù): 15/15頁
文件大?。?/td> 0K
描述: IC ADC 16BIT 135KSPS 28-TSSOP
標準包裝: 2,500
位數(shù): 16
采樣率(每秒): 135k
數(shù)據(jù)接口: 并聯(lián)
轉換器數(shù)目: 1
功率耗散(最大): 20mW
電壓電源: 模擬和數(shù)字
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 28-TSSOP
包裝: 帶卷 (TR)
輸入數(shù)目和類型: 1 個單端,單極
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 during the second falling edge of CS
selects which power-down mode the MAX1179/
MAX1187/MAX1189 enters upon conversion comple-
tion. Holding R/C low causes the MAX1179/MAX1187/
MAX1189 to enter standby mode. The reference and
buffer are left on after the conversion completes. R/C
high causes the MAX1179/MAX1187/MAX1189 to enter
shutdown mode and power down the reference and
buffer after conversion (see Figures 5 and 6). Set the
voltage at REF 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 MAX1179/MAX1187/MAX1189 to exit stand-
by mode and begin acquisition. The reference and ref-
erence buffer remain active to allow quick turn-on time.
MAX1179/MAX1187/MAX1189
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
_______________________________________________________________________________________
9
Figure 4. Equivalent Input Circuit
MAX1187
R2
R3
161
3.4k
TRACK
HOLD
S1, S2 = T/H SWITCH
S3 = POWER-DOWN
(MAX1179/MAX1189
ONLY)
S1
CHOLD
30pF
S2
AIN
MAX1179/MAX1189
R2
R3
161
3.4k
S3
POWER-
DOWN
TRACK
HOLD
REF
R2 = 7.85k
(MAX1189)
OR 3.92k
(MAX1179/MAX1187)
R3 = 5.45k
(MAX1189)
OR 17.79k
(MAX1179/MAX1187)
S1
CHOLD
30pF
S2
AIN
T/H OUT
Figure 5. Selecting Standby Mode
CS
R/C
EOC
ACQUISITION
CONVERSION
DATA
OUT
REF AND
BUFFER
POWER
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MAX1187CEUI+ 功能描述:模數(shù)轉換器 - ADC 16-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)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
MAX1187CEUI+T 功能描述:模數(shù)轉換器 - ADC 16-Bit 135ksps 4.2V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)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
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