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參數(shù)資料
| 型號(hào)： | MAX1280 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 400ksps/300ksps, Single-Supply, Low-Power, 8-Channel, Serial 12-Bit ADCs with Internal Reference |
| 中文描述： | 400ksps/300ksps、單電源、低功耗、8通道、串行12位ADC，內(nèi)置電壓基準(zhǔn) |
| 文件頁(yè)數(shù)： | 18/24頁(yè) |
| 文件大?。?/td> | 363K |
| 代理商： | MAX1280 |
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M
400ksps/300ksps, Single-Supply, Low-Power, 8-Channel,
Serial 12-Bit ADCs with Internal Reference
18
______________________________________________________________________________________
power consumption using the specified power-down
mode, with the internal reference and the maximum
clock speed. The clock speed in FASTPD or REDP
should be limited to 4.8MHz for the MAX1280/
MAX1281. FULLPD mode may provide increased power
savings in applications where the MAX1280/
MAX1281 are inactive for long periods of time, but
where intermittent bursts of high-speed conversions are
required.
Internal and External References
The MAX1280/MAX1281 can be used with an internal
or external reference. An external reference can be
connected directly at REF or at the REFADJ pin.
An internal buffer is designed to provide 2.5V at REF for
both the MAX1280/MAX1281. The internally trimmed
1.22V reference is buffered with a gain of +2.05V/V.
Internal Reference
The MAX1280/MAX1281’s full-scale range with the inter-
nal reference is 2.5V for unipolar inputs and ±1.25V for
bipolar inputs. The internal reference voltage is
adjustable to ±100mV with the circuit of Figure 13.
External Reference
An external reference can be placed at either the input
(REFADJ) or the output (REF) of the internal reference-
buffer amplifier. The REFADJ input impedance is typical-
ly 17k
. At REF, the DC input resistance is a minimum of
2.5
2.0
1.0
1.5
0.5
0
150
250
100
SAMPLING RATE (sps)
50
200
300
350
S
MAX1281, V
DD1
=
V
DD2
=
3.0V
C
LOAD
= 20pF
CODE = 101010000000
REDP
FASTPD
NORMAL OPERATION
Figure 11. Average Supply Current vs. Sampling Rate (Using
REPD, FASTPD, and Normal Operation and Internal Reference)
Figure 12a. Full Power-Down Timing
RE FADJ
1.22V
1.22V
0V
2.5mA
2.5mA
1.3mA OR 0.9mA
DIN
I
VDD1
+ I
VDD2
REF
FULLPD
REDP
DUMMY CONVERSION
WAIT 2ms (10 x RC)
FULLPD
1
0 0
1
1
γ
= RC = 17k
x 0.01
μ
F
1
1 0
0 0
2.5V
2.5mA
0mA
0mA
2.5V
0V
Figure 12b. Reduced-Power/Fast Power-Down Timing
2.5V (ALWAYS ON)
2.5mA
2.5mA
DIN
I
VDD1
+ I
VDD2
REF
REDPD
REDP
FASTPD
1
1 0
1
1
1 0
0
1
2.5mA
0.9mA
0.9mA
1.3mA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1280EVC16 | MAX1280 Evaluation System |
| MAX1280EVKIT | MAX1280 Evaluation System |
| MAX1281 | 400ksps/300ksps, Single-Supply, Low-Power, 8-Channel, Serial 12-Bit ADCs with Internal Reference |
| MAX1280BEUP | 400ksps/300ksps, Single-Supply, Low-Power, 8-Channel, Serial 12-Bit ADCs with Internal Reference |
| MAX1281BCUP | 400ksps/300ksps, Single-Supply, Low-Power, 8-Channel, Serial 12-Bit ADCs with Internal Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1280BCUP | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) 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 |
| MAX1280BCUP+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 5.5V 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 |
| MAX1280BCUP+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 8Ch 400ksps 5.5V 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 |
| MAX1280BCUP-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 |
| MAX1280BEUP | 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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