参数资料
| 型号： | MAX1409CAP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/48页 |
| 文件大小： | 0K |
| 描述： | IC DAS 16BIT LP 20-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 类型： | 数据采集系统（DAS） |
| 分辨率（位）： | 16 b |
| 采样率（每秒）： | 60 |
| 数据接口： | 串行 |
| 电压电源： | 模拟和数字 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
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MAX1407/MAX1408/MAX1409/MAX1414
Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
16
______________________________________________________________________________________
With the use of two external resistors, the DAC output
can go from 0.05V to AVDD - 0.2V. The ADCs and
DACs both utilize a precise low-drift 1.25V internal
bandgap reference for conversions and setting of the
full-scale range. For applications that require increased
accuracy, power-down the internal reference and con-
nect an external reference at REF. The RTC is leap year
compensated until 9999 and provides an alarm function
that can be used to wake-up the system or cause an
interrupt at a predefined time. The power-supply volt-
age monitors detect when AVDD falls below a trip
threshold voltage at either +1.8V or +2.7V causing the
reset to be asserted. The 4-wire serial interface is used
to communicate directly between SPI, QSPI, and
MICROWIRE devices for system configuration and
readback functions.
Analog Input Protection
Internal protection diodes clamp the analog input to
AVDD and AGND, which allow the channel input pins to
swing from AGND - 0.3V to AVDD + 0.3V without dam-
age. However, for accurate conversions near full scale,
the inputs must not exceed AVDD by more than 50mV
or be lower than AGND by 50mV.
Analog Mux
The MAX1407/MAX1408/MAX1414 include a dual 8 to 1
multiplexer for the positive and negative inputs of the
ADC. The MAX1409 has a dual 4 to 1 multiplexer at the
inputs of the ADC. Figures 1, 2, and 3 illustrate which
signals are present at the inputs of each multiplexer for
the MAX1407/MAX1408/MAX1409/MAX1414. The
MUXP and MUXN bits of the MUX register choose
which inputs will be seen at the input to the ADC
(Tables 4 and 5) and the signal-detect comparator. See
the MUX Register description under the On-Chip
Registers section for multiplexer functionality.
Input Buffers
The MAX1407/MAX1408/MAX1409/MAX1414 provide
input buffers to isolate the analog inputs from the capaci-
tive load presented by the ADC modulator (Figure 5 and
6). The buffers are chopper stabilized to reduce the effect
of their DC offsets and low-frequency noise. Since the
buffers can represent more than 25% of the total analog
power dissipation (typically 220A), they may be shut
down in applications where minimum power dissipation is
required and the capacitive input load is not a concern
(see ADC and Power1 Registers). Disable the buffers in
applications where the inputs must operate close to
AGND or above +1.4V. The buffers are individually
enabled or disabled.
Figure 1. MAX1407/MAX1414 Functional Diagram
MAX1407/MAX1414
*MAX1414 HAS A +50mV SIGNAL-DETECT COMPARATOR THRESHOLD.
10-BIT DAC
INTERRUPT
GENERATOR
REF
RESET
DGND
16-BIT ADC
PGA
BUF
WAKE-UP
LOGIC
SERIAL
INTERFACE
2.4576MHz
PLL
32.768kHz
OSCILLATOR
1.25V
BANDGAP
REFERENCE
1.8V/2.7V
P
SUPERVISORS
RESET
GENERATOR
RTC AND
ALARM
DIGITAL
OUTPUT
10-BIT DAC
8:1
INPUT
MUX
8:1
INPUT
MUX
BUF
AGND
CPLL
FOUT
CLKIN
CLKOUT
COMPARATOR
AVDD
SCLK
DIN
DOUT
OUT2
OUT1
IN3
IN2
IN1
IN0
REF
AVDD
FB2
FB1
IN3
IN2
IN1
IN0
REF
AGND
WU2
WU1
SHDN
INT
DRDY
D0
OUT1
FB1
OUT2
FB2
DVDD
CS
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| MAX1409EAP | 制造商:Maxim Integrated Products 功能描述:LOW-POWER, 16-BIT MULTICHANNEL DAS WITH INTER - Bulk |
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