參數(shù)資料
型號(hào)： MAX199BEWI
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： Fixed-Point Digital Signal Processor 532-FCBGA
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO28
封裝： 0.300 INCH, SO-28
文件頁(yè)數(shù)： 13/16頁(yè)
文件大?。?/td> 165K
代理商： MAX199BEWI
__________Applic ations Information
Power-On Reset
At power-up, the internal power-supply circuitry sets INT
high and puts the device in normal operation / external
clock mode. This state is selected to keep the internal
clock from loading the external clock driver when the
part is used in external clock mode.
Internal or External Referenc e
The MAX199 can operate with either an internal or external
reference. An external reference can be connected to
either the REF pin or to the REFADJ pin (Figure 9).
To use the REF input directly, disable the internal buffer
by tying REFADJ to V
DD
. Using the REFADJ input elimi-
nates the need to buffer the reference externally.
When the reference is applied at REFADJ , bypass
REFADJ with a 0.01μF capacitor to AGND.
The REFADJ internal buffer gain is trimmed to 1.6384 to
provide 4.096V at the REF pin from a 2.5V reference.
Internal Reference
The internally trimmed 2.50V reference is gained
through the REFADJ buffer to provide 4.096V at REF.
Bypass the REF pin with a 4.7μF capacitor to AGND
and the REFADJ pin with a 0.01μF capacitor to AGND.
The internal reference voltage is adjustable to ±1.5%
(±65 LSBs) with the reference-adjust circuit of Figure 1.
External Reference
At REF and REFADJ , the input impedance is a mini-
mum of 10k
for DC currents. During conversions, an
external reference at REF must be able to deliver
400μA DC load currents, and must have an output
impedance of 10
or less. If the reference has higher
input impedance or is noisy, bypass it close to the REF
pin with a 4.7μF capacitor to AGND.
With an external reference voltage of less than 4.096V
at the REF pin or less than 2.5V at the REFADJ pin, the
increase in the ratio of the RMS noise to the LSB value
(FS / 4096) results in performance degradation (loss of
effective bits).
M
Multi-Range (±4V, ±2V, +4V, +2V ),
+5V S upply, 12-Bit DAS with 8+4 Bus Interfac e
______________________________________________________________________________________
13
REF
10k
2.5V
26 4.096V
4.7
μ
F
C
REF
0.01
μ
F
25
REFADJ
A
V
= 1.638
MAX199
Figure 9a. Internal Reference
REF
10k
2.5V
26 4.096V
4.7
μ
F
C
REF
2.5V
25
REFADJ
A
V
= 1.638
0.01
μ
F
MAX199
Figure 9c. The external reference at REFADJ overdrives the
internal reference.
REF
V
DD
10k
2.5V
26
4.096V
4.7
μ
F
C
REF
25
REFADJ
A
V
= 1.638
MAX199
Figure 9b. External Reference at REF
相關(guān)PDF資料
PDF描述
MAX199ACNI Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
MAX199ACWI Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
MAX199AEAI Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
MAX199BCAI Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
MAX199BMYI Multi-Range (【4V, 【2V, +4V, +2V), +5V Supply, 12-Bit DAS with 8+4 Bus Interface
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參數(shù)描述
MAX199BEWI+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 8Ch 100ksps 4.18V 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
MAX199BEWI+T 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 8Ch 100ksps 4.18V 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
MAX199BEWI-T 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
MAX199BMDI 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
MAX-19H 制造商:MINI 制造商全稱:Mini-Circuits 功能描述:Active Mixer
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