參數(shù)資料
型號(hào)： MAX1146BCUP+T
廠商： Maxim Integrated Products
文件頁數(shù)： 10/25頁
文件大?。?/td> 0K
描述： IC ADC 14BIT 116KSPS 20-TSSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
位數(shù)： 14
采樣率（每秒）： 116k
數(shù)據(jù)接口： MICROWIRE?，QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 879mW
電壓電源： 單電源
工作溫度： 0°C ~ 70°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： 帶卷 (TR)
輸入數(shù)目和類型： 4 個(gè)單端，單極；4 個(gè)單端，雙極；2 個(gè)差分，單極；2 個(gè)差分，雙極
MAX1146–MAX1149
Multichannel, True-Differential,
Serial, 14-Bit ADCs
18
______________________________________________________________________________________
Shutdown and Power-Down Modes
The MAX1146–MAX1149 provide a hardware shutdown
and two software power-down modes.
Pulling SHDN low places the converter in hardware
shutdown. The conversion is immediately terminated
and the supply current is reduced to 300nA. Allow 2ms
for the device to power-up when the internal reference
buffer is used with CREFADJ = 0.01F and CREF =
2.2F. Larger capacitors on CREFADJ and CREF
increase the power-up time (Table 6). No wake-up time
is needed for the device to power-up from fast power-
down when using an external reference.
Select a software power-down mode through the PD1
and PD0 bits of the control byte (Table 1). When the
conversion in progress is complete, software power-
down is initiated. The serial interface remains active
and the last conversion result can be clocked out. In
full power-down mode, only the serial interface remains
operational and the supply current is reduced to
300nA. In fast power-down mode, only the bandgap
reference and the serial interface remain operational,
and the supply current is reduced to 600A.
The MAX1146–MAX1149 automatically wake up from
software power-down when they receive the control
byte’s start bit (Table 1). Allow 2ms for the device to
power-up when the internal reference buffer is used
with CREFADJ = 0.01F and CREF = 2.2F. Larger
capacitors on CREFADJ and CREF increase the power-
up time (Table 6). No wake-up time is needed for the
device to power-up from fast power-down when using
an external reference.
Reference Voltage
The MAX1146–MAX1149 can be used with an internal
or external reference voltage. The reference voltage
determines the ADC input range. The reference deter-
mines the full-scale output value (Table 7).
Internal Reference
The MAX1146–MAX1149 contain an internal 1.250V
bandgap reference. This bandgap reference is connect-
ed to REFADJ through a 20k
resistor. Bypass REFADJ
with a 0.01F capacitor to AGND. The MAX1146/
MAX1148 reference buffer has a 3.277V/V gain to pro-
vide +4.096V at REF. The MAX1147/MAX1149 reference
buffer has a 2.000V/V gain to provide +2.500V at REF.
Bypass REF with a minimum 2.2F capacitor to AGND
when using the internal reference.
External Reference
An external reference can be applied to the
MAX1146–MAX1149 in two ways:
1) Disable the internal reference buffer by connecting
REFADJ to VDD and apply the external reference to
REF (Figure 12).
2) Utilize the internal reference buffer by applying an
external reference to REFADJ (Figure 13).
SCLK
SSTRB
DIN
START SEL2 SEL1
SEL0
PD1
PD0
18
INPUT MUX
INPUT T/H
SET ACCORDING TO PREVIOUS
CONTROL BYTE
TRACK
HOLD
tCONV
DOUT
HIGH-Z
tACQ
14
TRACK
D13 D12
10
18
D5
D4
D3
D2
D1
D0
11
HOLD
14
D13
D12
START
10
D5
D4
SEL2
11
TRACK
CB1
CB2
SET TO CB2
SET TO CB1
RESET TO CB1
OPEN
RESET TO CB2
OPEN
CS
START SEL2 SEL1
SEL0
PD1
PD0
SGL/DIF UNI/BIP
tACQ
Figure 11. Internal Clock Mode—18 Clocks/Conversion Timing
CREFADJ*
CREF
POWER-UP TIMES FROM AN
EXTENDED POWER-DOWN
0.01F
4.7F
2ms
0.1F
10F
25ms
Table 6. Internal Reference Buffer Power-
Up Times vs. Bypass Capacitors
*Power-up times are dominated by CREFADJ.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1146BEUP 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
MAX1146BEUP-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
MAX1147 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Multichannel, True-Differential, Serial, 14-Bit ADCs
MAX1147BCUP 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
MAX1147BCUP+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 14-Bit 4Ch 116ksps 3.3V 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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