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参数资料
| 型号： | MAX1279AETC+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/18页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 1.5MSPS 12-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 位数： | 12 |
| 采样率（每秒）： | 1.5M |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 1.35W |
| 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： | 管件 |
| 输入数目和类型： | 1 个差分，双极 |
MAX1277/MAX1279
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 MAX1277/MAX1279 are operating with a sup-
ply voltage higher than the DSP supply voltage (see
Figures 17 and 18).
Layout, Grounding, and Bypassing
For best performance, use PC boards. Wire-wrap
boards are not recommended. Board layout should
ensure that digital and analog signal lines are separat-
ed from each other. Do not run analog and digital
(especially clock) lines parallel to one another, or digital
lines underneath the ADC package.
Figure 20 shows the recommended system ground
connections. Establish a single-point analog ground
(star ground point) at GND, separate from the logic
ground. Connect all other analog grounds and DGND
to this star ground point for further noise reduction. The
ground return to the power supply for this ground
should be low impedance and as short as possible for
noise-free operation.
High-frequency noise in the VDD power supply can
affect the ADC’s high-speed comparator. Bypass this
supply to the single-point analog ground with 0.01F
and 10F bypass capacitors. Minimize capacitor lead
lengths for best supply-noise rejection.
Definitions
Integral Nonlinearity
Integral nonlinearity (INL) is the deviation of the values on
an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the end points of the transfer function,
once offset and gain errors have been nullified. The static
linearity parameters for the MAX1277/MAX1279 are mea-
sured using the end-points method.
1.5Msps, Single-Supply, Low-Power, True-
Differential, 12-Bit ADCs with Internal Reference
16
______________________________________________________________________________________
MAX1277
MAX1279
ADSP21_ _ _
VL
SCLK
CNVST
DOUT
VDDINT
RCLK
RFS
TCLK
TFS
DR
Figure 19. Interfacing to the ADSP21_ _ _
10
μF
0.1
μF
10
μF
0.1
μF
GND
VL
SUPPLIES
DGND
VL
DIGITAL
CIRCUITRY
VDD
GND RGND
VL
MAX1277
MAX1279
Figure 20. Power-Supply Grounding Condition
0
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
0
DOUT
SCLK
CNVST
0
1
Figure 18. DSP Interface—Single-Conversion, Continuous/Burst Clock
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1279AETC+ | 功能描述:模数转换器 - ADC 12-Bit 1.5Msps 3.6V Precision 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 |
| MAX1279AETC+T | 功能描述:模数转换器 - ADC 12-Bit 1.5Msps 3.6V Precision 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 |
| MAX1279AETC-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 |
| MAX1279BCTC | 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 |
| MAX1279BCTC+ | 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 |
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