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参数资料
| 型号： | MAX1202EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX1202 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 133k |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/2 |
| 在以下条件下的电源（标准）： | 7.5mW @ 133kSPS |
| 工作温度： | 0°C ~ 70°C |
| 已用 IC / 零件： | MAX1202，MAX1203 |
| 已供物品： | 板，CD |
Table 1a. Unipolar Full Scale and Zero
Scale
MAX1202/MAX1203
5V, 8-Channel, Serial, 12-Bit ADCs
with 3V Digital Interface
______________________________________________________________________________________
11
Input Bandwidth
The ADC’s input tracking circuitry has a 4.5MHz
small-signal bandwidth. Therefore it is possible to digi-
tize high-speed transient events and measure periodic
signals with bandwidths exceeding the ADC’s sampling
rate by using undersampling techniques. To avoid
high-frequency signals being aliased into the frequency
band of interest, anti-alias filtering is recommended.
Analog Input Range and Input Protection
Internal protection diodes, which clamp the analog
inputs to VDD and VSS, allow the analog input pins to
swing from (VSS - 0.3V) to (VDD + 0.3V) without dam-
age. However, for accurate conversions near full scale,
the inputs must not exceed VDD by more than 50mV, or
be lower than VSS by 50mV.
If the analog input exceeds 50mV beyond the sup-
plies, do not forward bias the protection diodes of
off-channels more than 2mA.
The full-scale input voltage depends on the voltage at
REF (Tables 1a and 1b).
Quick Look
Use the circuit of Figure 5 to quickly evaluate the
MAX1202/MAX1203’s analog performance. The
MAX1202/MAX1203 require a control byte to be written
to DIN before each conversion. Tying DIN to +3V feeds
in control byte $FF hex, which triggers single-ended
unipolar conversions on CH7 in external clock mode
without powering down between conversions. In exter-
nal clock mode, the SSTRB output pulses high for one
clock period before the most significant bit of the 12-bit
conversion result shifts out of DOUT. Varying the ana-
log input to CH7 alters the sequence of bits from
DOUT. A total of 15 clock cycles per conversion is
required. All SSTRB and DOUT output transitions occur
on SCLK’s falling edge.
How to Start a Conversion
Clocking a control byte into DIN starts conversion on
the MAX1202/MAX1203. With CS low, each rising edge
on SCLK clocks a bit from DIN into the MAX1202/
MAX1203’s internal shift register. After CS falls, the first
logic “1” bit defines the control byte’s MSB. Until this
first “start” bit arrives, any number of logic “0” bits can
be clocked into DIN with no effect. Table 2 shows the
control-byte format.
The MAX1202/MAX1203 are fully compatible with
SPI/MICROWIRE devices. For SPI, select the correct
clock polarity and sampling edge in the SPI control reg-
isters: set CPOL = 0 and CPHA = 0. MICROWIRE and
SPI both transmit and receive a byte at the same time.
Using the
Typical Operating Circuit, the simplest soft-
ware interface requires only three 8-bit transfers to per-
form a conversion (one 8-bit transfer to configure the
ADC, and two more 8-bit transfers to clock out the
12-bit conversion result).
Table 1b. Bipolar Full Scale, Zero Scale,
and Negative Full Scale
REFERENCE
External
ZERO
SCALE
0V
at REFADJ
at REF
FULL SCALE
VREFADJ x A*
VREF
0V
Internal
+4.096V
-1/2 VREFADJ
x A*
-1/2 VREF
NEGATIVE
FULL SCALE
-4.096V / 2
+1/2 VREF
+1/2 VREFADJ
x A*
0V
+4.096V / 2
FULL SCALE
0V
ZERO
SCALE
at
REFADJ
External
REFERENCE
Internal
at REF
*
A = 1.68 for the MAX1202, 1.64 for the MAX1203.
*
A = 1.68 for the MAX1202, 1.64 for the MAX1203.
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相关代理商/技术参数 |
参数描述 |
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| MAX1202EVL11-DIP | 功能描述:数据转换 IC 开发工具 MAX1202 Eval Kit 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 |
| MAX1203ACAP | 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 |
| MAX1203ACAP+ | 功能描述:模数转换器 - ADC 12-Bit 8Ch 133ksps 5V 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 |
| MAX1203ACAP+T | 功能描述:模数转换器 - ADC 12-Bit 8Ch 133ksps 5V 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 |
| MAX1203ACAP-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 |
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