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參數(shù)資料
| 型號： | MAX1276CTC+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT 1.8MSPS 12-TQFN |
| 標準包裝： | 2,500 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1.8M |
| 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）： | 1.35W |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 12-WQFN 裸露焊盤 |
| 供應商設備封裝： | 12-TQFN-EP（4x4） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個差分，單極 |
MAX1276/MAX1278
1.8Msps, Single-Supply, Low-Power, True-
Differential, 12-Bit ADCs with Internal Reference
______________________________________________________________________________________
15
read the data without CPU intervention. Connect the VL
pin to the TMS320C54_ supply voltage when the
MAX1276/MAX1278 are operating with an analog sup-
ply voltage higher than the DSP supply voltage. The
word length can be set to 8 bits with FO = 1 to imple-
ment the power-down modes. The CNVST pin must idle
high to remain in either power-down state.
Another method of connecting the MAX1276/MAX1278
to the TMS320C54_ is to generate the clock signals
external to either device. This connection is shown in
Figure 16, where serial clock (CLOCK) drives the
CLKR, and SCLK and the convert signal (CONVERT)
drive the FSR and CNVST.
The serial port must be set up to accept an external
receive-clock and external receive-frame sync.
The SPC register should be written as follows:
TXM = 0, external frame sync
MCM = 0, CLKX is taken from the CLKX pin
FSM = 1, burst mode
FO = 0, data transmitted/received as 16-bit words
This setup allows continuous conversion, provided that
the DRR is serviced before the next conversion.
Alternatively, autobuffering can be enabled when using
the buffered serial port to read the data without CPU
intervention. Connect the VL pin to the TMS320C54_
supply voltage when the MAX1276/MAX1278 are oper-
ating with an analog supply voltage higher than the
DSP supply voltage.
The MAX1276/MAX1278 can also be connected to the
TMS320C54_ by using the data transmit (DX) pin to
drive CNVST and the CLKX generated internally to
drive SCLK. A pullup resistor is required on the CNVST
signal to keep it high when DX goes high impedance
and 0001hex should be written to the DXR continuously
for continuous conversions. The power-down modes
may be entered by writing 00FFhex to the DXR (see
Figures 17 and 18).
DSP Interface to the ADSP21_ _ _
The MAX1276/MAX1278 can be directly connected to
the ADSP21_ _ _ family of DSPs from Analog Devices,
Inc. Figure 19 shows the direct connection of the
MAX1276/MAX1278 to the ADSP21_ _ _. There are two
modes of operation that can be programmed to interface
with the MAX1276/MAX1278. For continuous conver-
sions, idle CNVST low and pulse it high for one clock
cycle during the LSB of the previous transmitted word.
The ADSP21_ _ _ STCTL and SRCTL registers should be
Figure 15. Interfacing to the TMS320C54_ Internal Clocks
Figure 16. Interfacing to the TMS320C54_ External Clocks
MAX1276
MAX1278
TMS320C54_
VL
SCLK
CNVST
DOUT
DVDD
CLKR
FSR
CLKX
FSX
DR
MAX1276
MAX1278
TMS320C54_
VL
DVDD
SCLK
CLKR
CNVST
FSR
DOUT
DR
CLOCK
CONVERT
0
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
DOUT
SCLK
CNVST
0
D0
1
Figure 17. DSP Interface—Continuous Conversion
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1276ETC | 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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1276ETC+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 1.8Msps 4.096V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1276ETC+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 1.8Msps 4.096V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1276ETC-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 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX1276EVC16 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 1.8Msps Single-Supply Low-Power True-Differential 12-Bit ADCs with Internal Reference RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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