Datasheet

AD8638/AD8639
Rev. F | Page 3 of 20
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—5 V OPERATION
V
SY
= 5 V, V
CM
= V
SY
/2, T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
3 9 μV
−40°C ≤ T
A
≤ +125°C 23 μV
−0.1 V ≤ V
CM
≤ +3.0 V 3 9 μV
−40°C ≤ T
A
≤ +125°C 23 μV
Input Bias Current I
B
1.5 40 pA
−40°C ≤ T
A
≤ +85°C 7 40 pA
−40°C ≤ T
A
≤ +125°C 45 105 pA
Input Offset Current I
OS
7 40 pA
−40°C ≤ T
A
≤ +85°C 7 40 pA
−40°C ≤ T
A
≤ +125°C 16.5 60 pA
Input Voltage Range −40°C ≤ T
A
≤ +125°C −0.1 +3 V
Common-Mode Rejection Ratio CMRR V
CM
= 0 V to 3 V 118 133 dB
−40°C ≤ T
A
≤ +125°C 118 dB
Large Signal Voltage Gain A
VO
R
L
= 10 kΩ, V
O
= 0.5 V to 4.5 V 120 136 dB
−40°C ≤ T
A
≤ +125°C 119 dB
Offset Voltage Drift for All Packages
Except SOT-23
∆V
OS
/∆T −40°C ≤ T
A
≤ +125°C 0.01 0.06 μV/°C
Offset Voltage Drift for SOT-23 ∆V
OS
/∆T −40°C ≤ T
A
≤ +125°C 0.04 0.15 μV/°C
Input Resistance R
IN
22.5 TΩ
Input Capacitance, Differential Mode C
INDM
4 pF
Input Capacitance, Common Mode C
INCM
1.7 pF
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
R
L
= 10 kΩ to V
CM
4.97 4.985 V
−40°C ≤ T
A
≤ +125°C 4.97 V
R
L
= 2 kΩ to V
CM
4.90 4.93 V
−40°C ≤ T
A
≤ +125°C 4.86 V
Output Voltage Low V
OL
R
L
= 10 kΩ to V
CM
7.5 10 mV
−40°C ≤ T
A
≤ +125°C 15 mV
R
L
= 2 kΩ to V
CM
32 40 mV
−40°C ≤ T
A
≤ +125°C 55 mV
Short-Circuit Current I
SC
T
A
= 25°C ±19 mA
Closed-Loop Output Impedance Z
OUT
f = 100 kHz, A
V
= 1 4.2 Ω
POWER SUPPLY
Power Supply Rejection Ratio PSRR V
SY
= 4.5 V to 16 V 127 143 dB
−40°C ≤ T
A
≤ +125°C 125 dB
Supply Current per Amplifier I
SY
I
O
= 0 mA 1.0 1.3 mA
−40°C ≤ T
A
≤ +125°C 1.5 mA
DYNAMIC PERFORMANCE
Slew Rate SR R
L
= 10 kΩ, C
L
= 20 pF, A
V
= 1 2.5 V/μs
Settling Time to 0.1% t
S
V
IN
= 2 V step, C
L
= 20 pF, R
L
= 1 kΩ, A
V
= 1 3 μs
Overload Recovery Time 50 μs
Gain Bandwidth Product GBP R
L
= 2 kΩ, C
L
= 20 pF, A
V
= 1 1.35 MHz
Phase Margin Φ
M
R
L
= 2 kΩ, C
L
= 20 pF, A
V
= 1 70 Degrees
NOISE PERFORMANCE
Voltage Noise e
n
p-p 0.1 Hz to 10 Hz 1.2 μV p-p
Voltage Noise Density e
n
f = 1 kHz 60 nV/√Hz