参数资料
型号: LM98725
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, PDSO56
封装: TSSOP-56
文件页数: 2/14页
文件大小: 464K
代理商: LM98725
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Minimum Gain
CDS Gain = 1x
0.58
0.62
0.67
V/V
CDS Gain = 1x
-4.7
-4.2
-3.5
dB
PGA Function
Gain (V/V) = (180/(277-PGA Code))
Gain (dB) = 20LOG10(180/(277-PGA Code))
Channel Matching
Minimum PGA Gain
3
%
Maximum PGA Gain
12.7
ADC Specifications
V
REFT
Top of Reference
2.07
V
REFB
Bottom of Reference
0.89
V
REFT -
V
REFB
Differential Reference Voltage
1.06
1.18
1.30
V
Overrange Output Code
65535
Underrange Output Code
0
Digital Offset “DAC” Specifications
Resolution
7
Bits
Digital Offset DAC LSB Step Size
Referred to AFE Output
32
LSB
Offset Adjustment Range
Min DAC Code =7b0000000
-2048
LSB
Referred to AFE Output
Mid DAC Code =7b1000000
0
Max DAC Code = 7b1111111
+2016
Full Channel Performance Specifications
DNL
Differential Non-Linearity
-0.999
+0.8/-0.7
2.5
LSB
INL
Integral Non-Linearity
-75
+18/-25
75
LSB
SNR
Total Output Noise
Minimum PGA Gain
-76
dB
10
26
LSB RMS
Maximum PGA Gain
-56
dB
96
LSB RMS
Channel to Channel Crosstalk
Mode 3
26
LSB
Mode 2
17
www.national.com
10
LM98725
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