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| 型号： | MAX1274AETC+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 1.8MSPS 12-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 位数： | 12 |
| 采样率（每秒）： | 1.8M |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 45mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WQFN 裸露焊盘 |
| 供应商设备封装： | 12-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，单极 |
MAX1274/MAX1275
1.8Msps, Single-Supply, Low-Power,
True-Differential, 12-Bit ADCs
______________________________________________________________________________________
15
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
MAX1274/
MAX1275 are operating with an analog supply voltage
higher than the DSP supply voltage.
The MAX1274/MAX1275 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 MAX1274/MAX1275 can be directly connected to
the ADSP21_ _ _ family of DSPs from Analog Devices,
Inc. Figure 19 shows the direct connection of the
MAX1274/MAX1275 to the ADSP21_ _ _. There are two
modes of operation that can be programmed to interface
with the MAX1274/MAX1275. 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
configured for early framing (LAFR = 0) and for an
active-high frame (LTFS = 0, LRFS = 0) signal. In this
mode, the data-independent frame-sync bit (DITFS = 1)
can be selected to eliminate the need for writing to the
transmit-data register more than once. For single conver-
sions, idle CNVST high and pulse it low for the entire
conversion. The ADSP21_ _ _ STCTL and SRCTL regis-
ters should be configured for late framing (LAFR = 1)
and for an active-low frame (LTFS = 1, LRFS = 1) signal.
This is also the best way to enter the power-down modes
by setting the word length to 8 bits (SLEN = 1001).
Connect the VL pin to the ADSP21_ _ _ supply voltage
when the MAX1274/MAX1275 are operating with a sup-
ply voltage higher than the DSP supply voltage (see
Figures 17 and 18).
Figure 15. Interfacing to the TMS320C54_ Internal Clocks
Figure 16. Interfacing to the TMS320C54_ External Clocks
MAX1274
MAX1275
TMS320C54_
VL
SCLK
CNVST
DOUT
DVDD
CLKR
FSR
CLKX
FSX
DR
MAX1274
MAX1275
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1274BCTC | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1274BCTC+ | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1274BCTC+T | 功能描述:模数转换器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1274BCTC-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1274BETC | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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