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参数资料
| 型号： | MAX110AEAP |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | Low-Cost, 2-Channel, 【14-Bit Serial ADCs |
| 中文描述： | 2-CH 14-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO20 |
| 封装： | 5.30 MM, 0.65 MM PITCH, SSOP-20 |
| 文件页数： | 11/24页 |
| 文件大小： | 411K |
| 代理商： | MAX110AEAP |
M
Low-Cost, 2-Channel, ±14-Bit S erial ADCs
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11
ADC Operation
The output data from the MAX110/MAX111 is arranged
in twos-complement format (Figures 4, 5). The sign bit
(POL) is shifted out first, followed by the overrange bit
(OR), and the 14 data bits (MSB first) (see Figure 6).
The MAX110 operates from ±5V power supplies and
converts low-frequency analog signals in the ±3V
range when using the maximum reference voltage of
V
REF
= 3V (V
REF
= V
REF+
- V
REF-
). Within the ±3V input
range, greater accuracy is obtained within ±2.5V (see
Electrical Characteristics for details). Note that a nega-
tive input voltage is defined as V
IN-
> V
IN+
. For the
MAX110, the absolute voltage at any analog input pin
must remain within the (V
SS
+ 2.25V) to (V
DD
- 2.25V)
range.
The MAX111 operates from a single +5V supply and
converts low-frequency differential analog signals in the
±1.5V range when using the maximum reference volt-
age of V
REF
= 1.5V. As indicated in the Electrical
Characteristics, greater accuracy is achieved within the
±1.2V range. The absolute voltage at any analog input
pin for the MAX111 must remain within 0V to V
DD
- 3.2V.
When V
IN-
> V
IN+
the input is interpreted as negative.
The overrange bit (OFL) is provided to sense when the
input voltage level has exceeded the reference voltage
level. The converter does not “saturate” until the input
voltage is typically 20% larger. The linearity is not guar-
anteed in this range. Note that the overrange bit works
properly if the reference voltage remains within the rec-
ommended voltage range (see Reference Inputs). If the
reference voltage exceeds the recommended input
range, the overrange bit may not operate properly.
Digital Interfac e—S tarting a Conversion
Data is transferred into and out of the serial I/O shift
register by pulling
CS
low and applying a serial clock
at SCLK. This fully static shift register allows SCLK to
range from DC to 2MHz. Output data from the ADC is
clocked out on SCLK’s falling edge and should be read
on SCLK’s rising edge. Input data to the ADC at DIN is
clocked in on SCLK’s rising edge. A new conversion
begins when
CS
returns high, provided the MSB in the
input control word (
NO-OP
) is a 1 (see Using the
MAX110/MAX111 with MICROWIRE, SPI, and QSPI
Serial Interfaces). Figure 6 shows the detailed serial-
interface timing diagram.
CS
must remain high during the conversion
(while
BUSY
remains low). Bringing
CS
low during the conver-
sion causes the ADC to stop converting, and may
result in erroneous output data.
Using the MAX110/MAX111 with SPI, QSPI, and
MICROWIRE Serial Interfaces
Figure 7 shows the most common serial-interface con-
nections. The MAX110/MAX111 are compatible with
SPI, QSPI (CPHA = 0, CPOL = 0), and MICROWIRE
serial-interface standards.
XCLK
TTL/CMOS
RCSEL
GND
+5V
-5V (0V)
( ) ARE FOR MAX111.
V
DD
V
SS
(AGND)
MAX110
MAX111
Figure 3b. Connection for Internal RC-Oscillator Mode—XCLK
connects to the internal RC oscillator. Note, the pull-up resistor
is not necessary if the internal oscillator is never shut down.
XCLK
RCSEL
1M
GND
+5V
-5V (0V)
V
DD
+5V
V
SS
(AGND)
MAX110
MAX111
( ) ARE FOR MAX111.
Figure 3a. Connection for External-Clock Mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX110AEAP-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 |
| MAX110AEPE | 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 |
| MAX110AEPE+ | 功能描述:模数转换器 - ADC 2Ch +/-14Bit Serial 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 |
| MAX110AEWE | 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 |
| MAX110AEWE+ | 功能描述:模数转换器 - ADC 2Ch +/-14Bit Serial 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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