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参数资料
| 型号： | MAX1321ECM+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/27页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 4CH 1.4MSPS 48LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 250 |
| 位数： | 14 |
| 采样率（每秒）： | 1.4M |
| 数据接口： | 并联 |
| 转换器数目： | 1 |
| 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： | 48-LQFP |
| 供应商设备封装： | 48-LQFP（7x7） |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，双极 |
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MAX1316–MAX1318/MAX1320–MAX1322/MAX1324–MAX1326
8-/4-/2-Channel, 14-Bit, Simultaneous-Sampling ADCs
with ±10V, ±5V, and 0 to +5V Analog Input Ranges
______________________________________________________________________________________
19
Reading After Conversion
Figure 7 shows the interface signals for a read operation
after a conversion with all eight channels enabled. At the
falling edge of EOLC, on the 38th clock pulse after the ini-
tiation of a conversion, driving CS and RD low places the
first conversion result onto the parallel bus, which can be
latched on the rising edge of RD. Successive low pulses
of RD place the successive conversion results onto the
bus. Pulse CONVST low to initiate a new conversion.
Power-Up Reset
At power-up, all channels are selected for conversion
(see the
Configuration Register section). After applying
power, allow a 1.0ms wake-up time to elapse before ini-
tiating the first conversion. Then, hold CONVST high for
at least 2.0s after the wake-up time is complete. If
using an external clock, apply 20 clock pulses to CLK
with CONVST high before initiating the first conversion.
Reference
Internal Reference
The internal-reference circuits provide for analog input
voltages of 0 to +5V unipolar (MAX1316/MAX1317/
MAX1318), ±5V bipolar (MAX1320/MAX1321/MAX1322),
or ±10V bipolar (MAX1324/MAX1325/MAX1326). Install
external capacitors for reference stability, as indicated in
Table 4, and as shown in the
Typical Operating Circuits.
External Reference
Connect a +2.0V to +3.0V external reference at REFMS
and/or REF. When connecting an external reference, the
input impedance is typically 5k. The external reference
must be able to drive 200A of current and have a low
output impedance. For more information about using
external references see the
Transfer Functions section.
Layout, Grounding, and Bypassing
For best performance use PC boards with ground
planes. Board layout should ensure that digital and
analog signal lines are separated from each other. Do
not run analog and digital lines parallel to one another
(especially clock lines), or do not run digital lines
underneath the ADC package. Figure 8 shows the rec-
ommended system ground connections when not using
a ground plane. A single-point analog ground (star
ground point) should be established at AGND, sepa-
rate from the logic ground. All other analog grounds
and DGND should be connected to this ground.
Figure 8. Power-Supply Grounding and Bypassing
Table 4. Reference Bypass Capacitors
INPUT VOLTAGE RANGE
LOCATION
UNIPOLAR (F)
BIPOLAR (F)
MSV bypass capacitor to AGND
2.2 || 0.1
NA
REFMS bypass capacitor to AGND
0.01
0.01 (connect REFMS to REF)
REF bypass capacitor to AGND
0.01
0.01 (connect REFMS to REF)
REF+ bypass capacitor to AGND
0.1
REF+ to REF- capacitor
2.2 || 0.1
REF- bypass capacitor to AGND
0.1
COM bypass capacitor to AGND
2.2 || 0.1
NA = Not applicable (connect MSV directly to AGND).
SUPPLIES
AVDD
AGND
DGND
VDD
DIGITAL
CIRCUITRY
OPTIONAL
FERRITE
BEAD
+5V
RETURN
+3V TO +5V
DVDD
GND
MAX1316–MAX1318
MAX1320–MAX1322
MAX1324–MAX1326
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| MAX1321ECM+ | 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V 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 |
| MAX1321ECM+T | 功能描述:模数转换器 - ADC 14-Bit 4Ch 526ksps 3V 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 |
| MAX1321ECM-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 |
| MAX13221ECTE | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| MAX13221ECTE+ | 功能描述:RS-232接口集成电路 115kV ESD Protected 1Tx/Rx RS-232 Trans RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
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