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AD8251 用户编程技术手册 - ADI（亚德诺）
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ADI（亚德诺）
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宽电源电压范围，微功耗， Wide Supply Range, Micropower,
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AD8251数据手册
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AD8251
Rev. B | Page 4 of 24
Parameter Conditions Min Typ Max Unit
Settling Time 0.001% ΔOUT = 10 V step
G = 1 785 ns
G = 2 700 ns
G = 4 700 ns
G = 8 770 ns
Slew Rate
G = 1 20 V/μs
G = 2 30 V/μs
G = 4 30 V/μs
G = 8 30 V/μs
Total Harmonic Distortion + Noise
f = 1 kHz, R
L
= 10 kΩ, ±10 V,
G = 1, 10 Hz to 22 kHz band-
pass filter
−110 dB
GAIN
Gain Range G = 1, 2, 4, 8 1 8 V/V
Gain Error OUT = ±10 V
G = 1 0.03 %
G = 2, 4, 8 0.04 %
Gain Nonlinearity OUT = −10 V to +10 V
G = 1 R
L
= 10 kΩ, 2 kΩ, 600 Ω 9 ppm
G = 2 R
L
= 10 kΩ, 2 kΩ, 600 Ω 12 ppm
G = 4 R
L
= 10 kΩ, 2 kΩ, 600 Ω 12 ppm
G = 8 R
L
= 10 kΩ, 2 kΩ, 600 Ω 15 ppm
Gain vs. Temperature All gains 3 10 ppm/°C
INPUT
Input Impedance
Differential 5.3||0.5
GΩ||pF
Common Mode 1.25||2
GΩ||pF
Input Operating Voltage Range V
S
= ±5 V to ±15 V −V
S
+ 1.5 +V
S
− 1.5 V
Over Temperature T = −40°C to +85°C −V
S
+ 1.6 +V
S
− 1.7 V
OUTPUT
Output Swing −13.5 +13.5 V
Over Temperature T = −40°C to +85°C −13.5 +13.5 V
Short-Circuit Current 37 mA
REFERENCE INPUT
R
IN
20 kΩ
I
IN
+IN, −IN, REF = 0 1 μA
Voltage Range −V
S
+V
S
V
Gain to Output 1 ± 0.0001 V/V
DIGITAL LOGIC
Digital Ground Voltage, DGND Referred to GND −V
S
+ 4.25 0 +V
S
− 2.7 V
Digital Input Voltage Low Referred to GND DGND 2.1 V
Digital Input Voltage High Referred to GND 2.8 +V
S
V
Digital Input Current 1 μA
Gain Switching Time
1
325 ns
t
SU
See Figure 3 timing diagram 20 ns
t
HD
See Figure 3 timing diagram 10 ns
t
WR
-LOW
See Figure 3 timing diagram 20 ns
t
WR
-HIGH
See Figure 3 timing diagram 40 ns
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