參數(shù)資料
型號(hào)： MAX1402EAI+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/38頁(yè)
文件大?。?/td> 0K
描述： IC ADC 18BIT LP 28-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
位數(shù)： 18
采樣率（每秒）： 480
數(shù)據(jù)接口： QSPI?，串行，SPI?
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 34mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 3 個(gè)差分，單極；3 個(gè)差分，雙極；5 個(gè)偽差分，單極；5 個(gè)偽差分，雙極
MAX1402
+5V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
______________________________________________________________________________________
13
_______________Detailed Description
Circuit Description
The MAX1402 is a low-power, multichannel, serial-output,
sigma-delta ADC designed for applications with a wide
dynamic range, such as weigh scales and pressure
transducers. The functional block diagram in Figure 2
contains a switching network, a modulator, a PGA, two
buffers, an oscillator, an on-chip digital filter, and a
bidirectional serial communications port.
Three fully-differential input channels feed into the
switching network. Each channel may be independent-
ly programmed with a gain between +1V/V and
+128V/V. These three differential channels may also be
configured to operate as five pseudo-differential input
channels. Two additional, fully differential system-cali-
bration channels allow system gain and offset error to
be measured. These system-calibration channels can
be used as additional differential signal channels when
dedicated gain and offset error correction channels are
not required.
Two chopper-stabilized buffers are available to isolate
the selected inputs from the capacitive loading of the
PGA and modulator. Three independent DACs provide
compensation for the DC component of the input signal
on each of the differential input channels.
The sigma-delta modulator converts the input signal into
a digital pulse train whose average duty cycle represents
the digitized signal information. The pulse train is then
processed by a digital decimation filter, resulting in a
conversion accuracy exceeding 16 bits. The digital filter’s
decimation factor is user-selectable, which allows the
conversion result’s resolution to be reduced to achieve a
higher output data rate. When used with 2.4576MHz or
1.024MHz master clocks, the decimation filter can be
programmed to produce zeros in its frequency response
at the line frequency and associated harmonics. This
ensures excellent line rejection without the need for fur-
ther post-filtering. In addition, the modulator sampling
frequency can be optimized for either lowest power dis-
sipation or highest output data rate.
AGND
V+
DGND
VDD
CALOFF+
OUT2
OUT1
CALGAIN+
CALOFF-
CALGAIN-
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
SWITCHING
NETWORK
MODULATOR
DAC
PGA
V+
BUFFER
AGND
V+
DIGITAL
FILTER
SCLK
DIN
DOUT
INT
CS
DS0
DS1
RESET
CLKIN
CLKOUT
REFIN+
REFIN-
DIVIDER
MAX1402
INTERFACE
AND CONTROL
CLOCK
GEN
Figure 2. Functional Diagram
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1402EVC16 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX1402 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1402EVKIT 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX1402 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1402EVKIT+ 功能描述:數(shù)據(jù)轉(zhuǎn)換 IC 開發(fā)工具 MAX1402 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Demonstration Kits 類型:ADC 工具用于評(píng)估:ADS130E08 接口類型:SPI 工作電源電壓:- 6 V to + 6 V
MAX1403CAI 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX1403CAI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 5Ch 4.8ksps 1.25V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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