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參數(shù)資料
| 型號(hào)： | MAX1177BCUP |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO20 |
| 封裝： | 4.40 MM, MO-153AC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 8/13頁(yè) |
| 文件大?。?/td> | 293K |
| 代理商： | MAX1177BCUP |
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M
Power-Down Modes
Select standby mode or shutdown mode with the R/
C
bit during the second falling edge of
CS
(see the
Selecting Standby or Shutdown Mode
section). The
MAX1177 automatically enters either standby mode
(reference and buffer on) or shutdown (reference and
buffer off) after each conversion, depending on the sta-
tus of R/
C
during the second falling edge of
CS
.
Internal Clock
The MAX1177 generates an internal conversion clock to
free the μP from the burden of running the SAR conver-
sion clock. Total conversion time (t
CONV
) after entering
hold mode (second falling edge of
CS
) to end-of-con-
version (
EOC
) falling is 4.7μs (max).
Applications Information
Starting a Conversion
CS
and R/
C
control acquisition and conversion in the
MAX1177 (Figure 2). The first falling edge of
CS
powers
up the device and puts it in acquire mode if R/
C
is low.
The convert start is ignored if R/
C
is high. The device
needs at least 12ms for the internal reference to wake
up and settle before starting the conversion (C
REFADJ
= 0.1μF, C
REF
= 10μF), if powering up from shutdown.
Selecting Standby or Shutdown Mode
The MAX1177 has 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, eliminating the need to wait for
the reference to power up before performing the next
conversion. Shutdown mode powers down the refer-
ence and reference buffer after completing a conver-
sion. The reference and reference buffer require a
minimum of 12ms to power up and settle from shut-
down (C
REFADJ
= 0.1μF, C
REF
= 10μF).
The state of R/
C
at the second falling edge of
CS
selects which power-down mode the MAX1177 enters
upon conversion completion. Holding R/
C
low causes
the device to enter standby mode. The reference and
buffer are left on after the conversion completes. R/
C
high causes the MAX1177 to enter shutdown mode and
power-down the reference and buffer after conversion
(Figures 5 and 6). Set the voltage at R/
C
high during
the second falling edge of
CS
to realize the lowest cur-
rent operation.
16-Bit, 135ksps, Single-Supply ADC
with to 10V Input Range
8
_______________________________________________________________________________________
S1, S2 = T/H SWITCH
R2 = 3.92k
R3 = 17.79k
S2
S1
AIN
R1
3.4k
R3
17.79k
R2
3.92k
T/H OUT
HOLD
HOLD
TRACK
TRACK
C
HOLD
30pF
161
MAX1177
Figure 4. Equivalent Input Circuit
D0
–
D7
OR
D8
–
D15
μ
P DATA
BUS
AV
DD
DV
DD
AGND DGND
+5V ANALOG
+5V DIGITAL
ANALOG INPUT
AIN
HBEN
EOC
CS
R/C
REF
REFADJ
HIGH
BYTE
LOW
BYTE
10
μ
F
0.1
μ
F
0.1
μ
F
0.1
μ
F
MAX1177
Figure 3. Typical Operating Circuit for the MAX1177
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| MAX1177BEUP | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
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| MAX1177CEUP | 16-Bit, 135ksps, Single-Supply ADC with 0 to 10V Input Range |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1177BCUP+ | 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 |
| MAX1177BCUP+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 |
| MAX1177BCUP-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 |
| MAX1177BEUP | 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 |
| MAX1177BEUP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 16-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 |
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