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MAX1415|MAX1416

更新时间： 2024-09-20 23:45:43
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美信 - MAXIM /
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36页 667K
描述
16-Bit. Low-Power. 2-Channel. Sigma-Delta ADCs

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MAX1415|MAX1416 数据手册

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19-3163; Rev 0; 1/04  
16-Bit, Low-Power, 2-Channel,  
Sigma-Delta ADCs  
General Description  
Features  
The MAX1415/MAX1416 low-power, 2-channel, serial-  
output analog-to-digital converters (ADCs) use a sigma-  
delta modulator with a digital filter to achieve 16-bit  
resolution with no missing codes. These ADCs are pin-  
compatible upgrades to the MX7705/AD7705. The  
MAX1415/MAX1416 feature an internal oscillator (1MHz  
or 2.4576MHz), an on-chip input buffer, and a program-  
mable gain amplifier (PGA). The devices offer an SPI™-/  
QSPI™-/MICROWIRE™-compatible serial interface.  
♦ 16-Bit Sigma-Delta ADCs  
♦ Two Fully Differential Input Channels  
♦ 0.0015% Integral Nonlinearity with No Missing  
Codes  
♦ Internal Analog Input Buffers  
♦ Programmable Gain Amplifier (PGA) from 1 to 128  
♦ Internal Oscillator (2.4576MHz or 1MHz)  
♦ Single 2.7V to 3.6V (MAX1415) or 4.75V to 5.25V  
The MAX1415 requires a single 2.7V to 3.6V supply, and  
the MAX1416 requires a single 4.75V to 5.25V supply.  
The operating supply current is 400µA (max) with a 3V  
supply. Power-down mode reduces the supply current to  
2µA (typ). When operating with a supply of 3V, the power  
dissipation is less than 1.44mW, making the MAX1415  
ideal for battery-powered applications.  
(MAX1416) Supply  
♦ Low Power  
1mW max, 3V Supply  
2µA (typ) Power-Down Current  
♦ SPI™-/QSPI™-/MICROWIRE™-Compatible 3-Wire  
Serial Interface  
Self-calibration and system calibration allow the  
MAX1415/MAX1416 to correct for gain and offset errors.  
Excellent DC performance ( 0.0015% FSR INL) and low  
noise (700nV in unbuffered mode) make the MAX1415/  
MAX1416 ideal for measuring low-frequency signals with  
a wide dynamic range. These devices accept fully differ-  
ential bipolar/unipolar inputs. An internal input buffer  
allows for input signals with high source impedances. An  
on-chip digital filter, with a programmable cutoff and out-  
put data rate, processes the output of the sigma-delta  
modulator. The first notch frequency of the digital filter is  
chosen to provide 150dB rejection of common-mode  
50Hz or 60Hz noise and 98dB rejection of normal-mode  
50Hz or 60Hz noise. A PGA and digital filtering allow sig-  
nals to be directly acquired with little or no signal-condi-  
tioning requirements.  
♦ Pin Compatible with MX7705/AD7705  
♦ 16-Pin PDIP, SO, and TSSOP Packages  
Ordering Information  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
V
(V)  
DD  
MAX1415ENE*  
MAX1415EWE*  
MAX1415EUE  
-45°C to +85°C  
-45°C to +85°C  
-45°C to +85°C  
16 PDIP  
3
3
3
3
3
3
3
3
3
16 Wide SO  
16 TSSOP  
16 PDIP  
MAX1415AENE* -45°C to +85°C  
MAX1415AEWE* -45°C to +85°C  
MAX1415AEUE* -45°C to +85°C  
16 Wide SO  
16 TSSOP  
16 PDIP  
MAX1415CNE*  
MAX1415CWE*  
MAX1415CUE*  
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
The MAX1415/MAX1416 are available in 16-pin PDIP,  
SO, and TSSOP packages.  
16 Wide SO  
16 TSSOP  
Applications  
*Future product—contact factory for availability.  
Ordering Information continued at end of data sheet.  
Industrial Instruments  
Weigh Scales  
Pin Configuration  
Strain-Gauge Measurements  
Loop-Powered Systems  
Flow and Gas Meters  
Medical Instrumentation  
Pressure Transducers  
Thermocouple Measurements  
RTD Measurements  
TOP VIEW  
SCLK  
1
2
3
4
5
6
7
8
16 GND  
CLKIN  
15 V  
DD  
CLKOUT  
CS  
14 DIN  
MAX1415  
MAX1416  
13 DOUT  
12 DRDY  
11 AIN2-  
10 REF-  
RESET  
AIN2+  
AIN1+  
AIN1-  
9
REF+  
SPI/QSPI are trademarks of Motorola, Inc.  
MICROWIRE is a trademark of National Semiconductor Corp.  
PDIP/SO/TSSOP  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
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