参数资料
| 型号： | MAX111BEWE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 24/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 2CH 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1,000 |
| 位数： | 14 |
| 数据接口： | MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 762mW |
| 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： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 4 个单端，单极；2 个差分，单极 |
MAX110/MAX111
Low-Cost, 2-Channel, ±14-Bit Serial ADCs
_______________________________________________________________________________________
9
_______________Detailed Description
The MAX110/MAX111 ADC converts low-frequency
analog signals to a 16-bit serial digital output (14 data
bits, a sign bit, and an overrange bit) using a first-order
sigma-delta loop (Figure 1). The differential input volt-
age is internally connected to a precision voltage-to-
current converter. The resulting current is integrated
and applied to a comparator. The comparator output
then drives an up/down counter and a 1-bit DAC. When
the DAC output is fed back to the integrator input, the
sigma-delta loop is completed.
During a conversion, the comparator output is a VREF-
to VREF+ square wave; its duty cycle is proportional to
the magnitude of the differential input voltage applied
to the ADC. The up/down counter clocks data in from
the comparator at the oversampling clock rate and
averages the pulse-width-modulated (PWM) square
wave to produce the conversion result. A 16-bit static
shift register stores the result at the end of the conver-
sion. Figure 2 shows the ADC waveforms for a differen-
tial analog input equal to 1/2 (VREF+ - VREF-). The
resulting comparator and 1-bit DAC outputs are high
for seven cycles and low for three cycles of the over-
sampling clock.
Since the analog input signal is integrated over many
clock cycles, much of the signal and quantization noise
is attenuated. The more clock cycles allowed during
each conversion, the greater the noise attenuation (see
Programming Conversion Time).
______________________________________________________________Pin Description
Clock Input / RC Oscillator Output. TTL/CMOS-compatible oversampling clock input
when RCSEL = GND. Connects to the internal RC oscillator when RCSEL = VDD. XCLK
must be connected to VDD or GND through a resistor (1M or less) when RC OSC
mode is selected.
XCLK
8
Serial Clock Input. TTL/CMOS-compatible clock input for serial-interface data I/O.
SCLK
9
Busy Output. Goes low at conversion start, and returns high at end of conversion.
BUSY
10
Positive Power-Supply Input—connect to +5V
VDD
6
RC Select Input. Connect to GND to select external clock mode. Connect to VDD to
select RC OSC mode. XCLK must be connected to VDD or GND through a resistor
(1M
or less) when RC OSC mode is selected.
RCSEL
7
Positive Reference Input
REF+
3
Negative Reference Input
REF-
2
Channel 1 Positive Analog Input
IN1+
1
FUNCTION
NAME
SSOP
6
7
8
4
5
3
2
PIN
1
DIP/SO
Chip-Select Input. Pull this input low to perform a control-word-write/data-read opera-
tion. A conversion begins when CS returns high, provided NO-OP is a 1. See the sec-
tion
Using the MAX110/MAX111 with SPI, QSPI, and MICROWIRE Serial Interfaces.
CS
11
9
Serial Data Output. High-impedance when CS is high.
DOUT
12
10
Serial Data Input. See
Control Register section.
DIN
13
11
Digital Ground
GND
16
12
MAX110 Negative Power-Supply Input—connect to -5V
VSS
Channel 2 Negative Analog Input
IN2-
18
14
Channel 2 Positive Analog Input
IN2+
19
15
Channel 1 Negative Analog Input
IN1-
20
16
No Connect—there is no internal connection to this pin
N.C.
4, 5, 14, 15
—
MAX111 Analog Ground
AGND
17
13
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX111BMJE | 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 |
| MAX111CAP | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog-to-Digital Converter， 15-Bit |
| MAX111CPE | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog-to-Digital Converter， 15-Bit |
| MAX111CWE | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog-to-Digital Converter， 15-Bit |
| MAX111EAP | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Analog-to-Digital Converter， 15-Bit |
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