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參數(shù)資料
| 型號： | MAX11131ATI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/37頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SRL 28-TQFN-EP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 25 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 3M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 2.76W |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（5x5） |
| 包裝： | 管件 |
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17
Maxim Integrated
MAX11129–MAX11132
3Msps, Low-Power, Serial 12-/10-Bit,
8-/16-Channel ADCs
Figure 4. Unipolar Transfer Function for 12-Bit Resolution
Internal FIFO
The MAX11129–MAX11132 contain a FIFO buffer that can
hold up to 16 ADC results. This allows the ADC to handle
multiple internally clocked conversions without tying up
the serial bus. If the FIFO is filled and further conversions
are requested without reading from the FIFO, the oldest
ADC results are overwritten by the new ADC results. Each
result contains 2 bytes, with the MSB preceded by four
leading channel address bits. After each falling edge of
CS, the oldest available byte of data is available at DOUT.
When the FIFO is empty, DOUT is zero.
External Clock
In external clock mode, the analog inputs are sampled at
the falling edge of CS. Serial clock (SCLK) is used to per-
form the conversion. The sequencer reads in the channel
to be converted from the serial data input (DIN) at each
frame. The conversion results are sent to the serial output
(DOUT) at the next frame.
Internal Clock
The MAX11129–MAX11132 operate from an internal
oscillator, which is accurate within Q15% of the 40MHz
nominal clock rate. Request internally timed conversions
by writing the appropriate sequence to the ADC Mode
Control register (Table 2). The wake-up, acquisition, con-
version, and shutdown sequences are initiated through
CNVST and are performed automatically using the inter-
nal oscillator. Results are added to the internal FIFO.
With CS high, initiate a scan by setting CNVST low for
at least 5ns before pulling it high (Figure 6). Then, the
MAX11129–MAX11132 wake up, scan all requested
channels, store the results in the FIFO, and shut down.
After the scan is complete, EOC is pulled low and the
results are available in the FIFO. Wait until EOC goes
low before pulling CS low to communicate with the serial
interface. EOC stays low until CS or CNVST is pulled low
again. Do not initiate a second CNVST before EOC goes
low; otherwise, the FIFO may become corrupted.
Alternatively, set SWCNV to 1 in the ADC Mode Control
register to initiate conversions with CS rising edge
instead of cycling CNVST (Table 2). For proper operation,
CS must be held low for 17 clock cycles to guarantee
that the device interprets the SWCNV setting. A delay
is initiated at the rising edge of CS and the conversion
is started when the delay times out. Upon completing
the conversion, this bit is reset to 0 (Figure 7). Apply a
soft reset when changing from internal to external clock
mode: RESET[1:0] = 10.
Figure 5. Bipolar Transfer Function for 12-Bit Resolution
01
23
4
FS
FFF
FFE
FFD
FFC
FFB
000
001
002
003
004
OUTPUT CODE (hex)
INPUT VOLTAGE (LSB)
FS = VREF+
ZS = 0
1 LSB =
4096
VREF+
FS -1.5 LSB
-FS
+FS
7FF
7FE
001
000
800
801
FFE
OUTPUT CODE (hex)
INPUT VOLTAGE (LSB)
ZS = 0
+FS =
2
VREF+
FFF
0
-FS =
2
-VREF+
1 LSB =
4096
VREF+
+FS -1.5 LSB
-FS +0.5 LSB
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參數(shù)描述 |
|---|---|
| MAX11131ATI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 16Ch 3Msps 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 |
| MAX11131ATI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 16Ch 3Msps 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 |
| MAX11131AUI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 16 Ch 3Msps Serial 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 |
| MAX11131AUI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 16 Ch 3Msps Serial 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 |
| MAX11131EVKIT# | 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX11131 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V |
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