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| 型号： | MAX1198ECM+D |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT 100MSPS DUAL 48-TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 250 |
| 位数： | 8 |
| 采样率（每秒）： | 100M |
| 数据接口： | 并联 |
| 转换器数目： | 2 |
| 功率耗散（最大）： | 314mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-TQFP 裸露焊盘 |
| 供应商设备封装： | 48-TQFP 裸露焊盘（7x7） |
| 包装： | 托盘 |
| 输入数目和类型： | 4 个单端，双极；2 个差分，双极 |
| 产品目录页面： | 1396 (CN2011-ZH PDF) |
Match the impedance of INA+ and INA-, as well as
INB+ and INB-, and set the common-mode voltage to
mid supply (VDD/2) for optimum performance.
Analog Inputs and Reference
Configurations
The full-scale range of the MAX1198 is determined by
the internally generated voltage difference between
REFP (VDD/2 + VREFIN/4) and REFN (VDD/2 - VREFIN/4).
The full-scale range for both on-chip ADCs is
adjustable through the REFIN pin, which is provided for
this purpose.
The MAX1198 provides three modes of reference operation:
Internal reference mode
Buffered external reference mode
Unbuffered external reference mode
In internal reference mode, connect the internal refer-
ence output REFOUT to REFIN through a resistor (e.g.,
10k
) or resistor-divider, if an application requires a
reduced full-scale range. For stability and noise-filtering
purposes, bypass REFIN with a >10nF capacitor to
GND. In internal reference mode, REFOUT, COM,
REFP, and REFN become low-impedance outputs.
In buffered external reference mode, adjust the refer-
ence voltage levels externally by applying a stable and
accurate voltage at REFIN. In this mode, COM, REFP,
and REFN are outputs. REFOUT can be left open or
connected to REFIN through a >10k
resistor.
In unbuffered external reference mode, connect REFIN
to GND. This deactivates the on-chip reference buffers
for REFP, COM, and REFN. With their buffers shut
down, these nodes become high-impedance inputs
and can be driven through separate, external reference
sources.
For detailed circuit suggestions and how to drive this
dual ADC in buffered/unbuffered external reference
mode, see the Applications Information section.
Clock Input (CLK)
The MAX1198’s CLK input accepts a CMOS-compati-
ble clock signal. Since the interstage conversion of the
device depends on the repeatability of the rising and
falling edges of the external clock, use a clock with low
jitter and fast rise and fall times (<2ns). In particular,
sampling occurs on the rising edge of the clock signal,
requiring this edge to provide lowest possible jitter. Any
significant aperture jitter would limit the SNR perfor-
mance of the on-chip ADCs as follows:
where fIN represents the analog input frequency and
tAJ is the time of the aperture jitter.
Clock jitter is especially critical for undersampling
applications. The clock input should always be consid-
ered as an analog input and routed away from any ana-
log input or other digital signal lines.
SNR
ft
IN
AJ
log
=×
××
×
20
1
2
π
MAX1198
Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC
with Internal Reference and Parallel Outputs
______________________________________________________________________________________
13
N - 6
N
N - 5
N + 1
N - 4
N + 2
N - 3
N + 3
N - 2
N + 4
N - 1
N + 5
N
N + 6
N + 1
5-CLOCK-CYCLE LATENCY
ANALOG INPUT
CLOCK INPUT
DATA OUTPUT
D7A–D0A
tDO
tCH
tCL
N - 6
N - 5
N - 4
N - 3
N - 2
N - 1
N
N + 1
DATA OUTPUT
D7B–D0B
tAD
Figure 3. System Timing Diagram
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相关代理商/技术参数 |
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| MAX1198ECM-TD | 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 |
| MAX1198EVKIT | 功能描述:数据转换 IC 开发工具 RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MAX11G | 制造商:Aavid Thermalloy 功能描述:METALIC HEAT SINK CLIP |
| MAX11NG | 功能描述:散热片 MaxClip TO220/Max220 9lb 24.7x12mm RoHS:否 制造商:Ampro By ADLINK 产品:Heat Sink Accessories 安装风格:Through Hole 散热片材料: 散热片样式: 热阻: 长度: 宽度: 高度: 设计目的:Express-HRR |
| MAX12 | 制造商:Aavid Thermalloy 功能描述:CBL ACC LOW FORCE CLIP - Bulk 制造商:Lanzar 功能描述:4Ohm 1000W Peak 12 Paper Cone Woofer 制造商:LANZAR 功能描述:12 PAPER CONE WOOFER 4OHM 1000W PEAK 制造商:Aavid Thermalloy 功能描述:Thrml Mgmt Access Heat Sink Clip |
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