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| 型號(hào)： | MAX1329BETL+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 60/78頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS 12BIT 300KSPS 40-TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 系列： | * |
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MAX1329/MAX1330
12-/16-Bit DASs with ADC, DACs, DPIOs, APIOs,
Reference, Voltage Monitors, and Temp Sensor
______________________________________________________________________________________
63
Applications Information
Power-Supply Considerations
The circuit in Figure 23 applies an external 3.0V power
supply to both DVDD and AVDD. To drive AVDD directly,
disable the internal charge pump through the CP/VM
Control register. The bypass switch between DVDD and
AVDD can be either open or closed in this configuration.
Figure 24 shows the charge pump enabled to supply
AVDD. The charge-pump output voltage is set to 5.0V
through the CP/VM Control register. See the
Charge-
Pump Component Selection section.
Figure 25 shows DVDD is powered from a battery with
the charge-pump output set to 3.0V. The charge pump
can draw high peak currents from DVDD under maxi-
mum load. Select an appropriately sized bypass capac-
itor for DVDD (≥ 10 times CFLY). Supply ripple can be
reduced by increasing CAVDD and/or the charge-pump
clock frequency.
Running Directly Off Batteries
The MAX1329/MAX1330 can be powered directly from
two alkaline cells, two silver oxide button cells, or a lithi-
um-coin cell. DVDD requires 1.8V to 3.6V and AVDD
requires 2.7V to 5.5V for proper operation. Save power
by running DVDD directly off the battery and shorting to
AVDD by closing the internal bypass switch. Use the
2.7V AVDD voltage monitor to detect when it drops to
2.7V. Power is saved during this time because the inter-
nal charge pump is off. Once the battery voltage drops
to 2.7V, open the bypass switch and enable the internal
charge pump as long as DVDD is between 1.8V and
2.7V. Following this procedure optimizes the battery life.
Digital-Interface Connections
Figure 26 provides standard digital-interface connections
between the MAX1329/MAX1330 and a C. The C gen-
erates its own 32kHz clock for timekeeping and the
MAX1329/MAX1330 provide the high-frequency clock
required by the C. See the
Clock Control Register sec-
tion to program the CLKIO output and frequency and set
the ODLY bit to delay the turn-off time to enable the C
time to go to sleep. During sleep, CLKIO becomes an
input and requires a weak pulldown resistor (≤1M) to
minimize power dissipation. See the DPIO Setup and
DPIO Control registers to program DPIO1–DPIO4 as
wake-ups. Upon wake-up, the internal oscillator starts and
outputs to CLKIO. See the
CP/VM Control Register sec-
tion to program the
RST1 and RST2 as a reset or interrupt.
MAX1329
MAX1330
DVDD C1A C1B
AVDD
DGND
AGND
INTERRUPT
VDD
DGND
POWER
SUPPLY
0.1F
2.7V TO 3.6V
C
RST1
RST2
RESET
Figure 23. Power-Supply Circuit Using an External 3.0V Power
Supply for DVDD and AVDD
MAX1329
MAX1330
DVDD
RST1
C1A
C1B
AVDD
DGND
AGND
INTERRUPT
VDD
DGND
POWER
SUPPLY
0.1F
2.7V TO 3.6V
CFLY
5.0V
CAVDD
CDVDD
C
RST2
RESET
Figure 24. Power-Supply Circuit Using an External 3.0V Power
Supply for DVDD and Internal Charge Pump Set to 5V for AVDD
MAX1329
MAX1330
DVDD C1A C1B
AVDD
DGND
AGND
INTERRUPT
VDD
DGND
0.1F
1.8V TO 3.6V
CFLY
3.0V
CAVDD
CDVDD
C
E1
RST1
RST2
RESET
Figure 25. Power-Supply Circuit Using a Battery for DVDD and
Internal Charge Pump Set to 3.0V for AVDD
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參數(shù)描述 |
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| MAX1329BETL+ | 功能描述:ADC / DAC多通道 12-Bit 2Ch 300ksps 5.4V Precision ADC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX1329BETL+T | 功能描述:ADC / DAC多通道 12-Bit 2Ch 300ksps 5.4V Precision ADC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換速率: 分辨率:8 bit 接口類型:SPI 電壓參考: 電源電壓-最大:3.6 V 電源電壓-最小:2 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-40 |
| MAX132C/D | 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 |
| MAX132CNG | 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 |
| MAX132CNG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit .1ksps .545V 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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