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参数资料
| 型号： | MAX1297 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface |
| 中文描述： | 265ksps、+3V、6/2通道、12位ADC，带有+2.5V电压基准及并行接口 |
| 文件页数： | 16/20页 |
| 文件大小： | 228K |
| 代理商： | MAX1297 |
M
265ksps, +3V, 6-/2-Channel, 12-Bit ADCs
with +2.5V Reference and Parallel Interface
16
______________________________________________________________________________________
acquisition cycle of the next conversion, and then read-
ing the results of the previous conversion from the bus.
This technique (Figure 10) allows a conversion to be
completed every 16 clock cycles. Note that the switch-
ing of the data bus during acquisition or conversion can
cause additional supply noise, which may make it diffi-
cult to achieve true 12-bit performance.
Layout, Grounding, and Bypassing
For best performance, use printed circuit (PC) boards.
Wire-wrap configurations are not recommended since
the layout should ensure proper separation of analog
and digital traces. Do not run analog and digital lines
parallel to each other, and don’t lay out digital signal
paths underneath the ADC package. Use separate
analog and digital PC board ground sections with only
one “star point” (Figure 11) connecting the two ground
systems (analog and digital). For lowest noise opera-
tion, ensure the ground return to the star ground’s
power supply is low impedance and as short as possi-
ble. Route digital signals far away from sensitive analog
and reference inputs.
High-frequency noise in the power supply, V
DD
, could
impair operation of the ADC’s fast comparator. Bypass
V
DD
to the star ground with a network of two parallel
capacitors, 0.1μF and 4.7μF, located as close as to the
MAX1295/MAX1297’s power-supply pin as possible.
Minimize capacitor lead length for best supply-noise
rejection and add an attenuation resistor (5
) if the
power supply is extremely noisy.
Figure 11. Power-Supply and Grounding Connections
Figure 10. Timing Diagram for Fastest Conversion
+3V
+3V
GND
SUPPLIES
DGND
+3V
COM
GND
4.7
μ
F
0.1
μ
F
V
DD
DIGITAL
CIRCUITRY
MAX1295
MAX1297
*R = 5
*OPTIONAL
CLK
ACQUISITION
CONTROL WORD
CONVERSION
D11–D0
ACQUISITION
SAMPLING INSTANT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
WR
RD
D7–D0
STATE
CONTROL
WORD
D11–
D0
相关PDF资料 |
PDF描述 |
|---|---|
| MAX1295AEEI | 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface |
| MAX1297BEEG | 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface |
| MAX1297ACEG | 265ksps, +3V, 6-/2-Channel, 12-Bit ADCs with +2.5V Reference and Parallel Interface |
| MAX1304ECM | 8-/4-/2-Channel, 12-Bit, Simultaneous-Sampling ADCs with 【10V, 【5V, and 0 to +5V Analog Input Ranges |
| MAX1309ECM | Metal Dust Cap; For Use With:Amphenol PCD FW Field TV Square Flange Receptacles; Body Plating:Olive Drab Cadmium RoHS Compliant: Yes |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1297ACEG | 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 |
| MAX1297ACEG+ | 功能描述:模数转换器 - ADC 12-Bit 2Ch 265ksps 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 |
| MAX1297ACEG+T | 功能描述:模数转换器 - ADC 12-Bit 2Ch 265ksps 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 |
| MAX1297ACEG-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 |
| MAX1297AEEG | 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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