Datasheet

AD8638/AD8639
Rev. F | Page 4 of 20
ELECTRICAL CHARACTERISTICS—16 V OPERATION
V
SY
= 16 V, V
CM
= V
SY
/2, T
A
= 25°C, unless otherwise noted.
Table 3.
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
≤ +14 V
3 9 μV
−40°C ≤ T
A
≤ +125°C
23 μV
Input Bias Current I
B
1 75 pA
−40°C ≤ T
A
≤ +85°C
4 75 pA
−40°C ≤ T
A
≤ +125°C
85 250 pA
Input Offset Current I
OS
20 70 pA
−40°C ≤ T
A
≤ +85°C
20 75 pA
−40°C ≤ T
A
≤ +125°C
50 150 pA
Input Voltage Range −40°C ≤ T
A
≤ +125°C −0.1 +14 V
Common-Mode Rejection Ratio CMRR V
CM
= 0 V to 14 V 127 142 dB
−40°C ≤ T
A
≤ +125°C 127 dB
Large Signal Voltage Gain A
VO
R
L
= 10 kΩ, V
O
= 0.5 V to 15.5 V 130 147 dB
−40°C ≤ T
A
≤ +125°C 130 dB
Offset Voltage Drift for All Packages
Except SOT-23
∆V
OS
/∆T −40°C ≤ T
A
≤ +125°C 0.03 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
15.94 15.96 V
−40°C ≤ T
A
≤ +125°C 15.93 V
R
L
= 2 kΩ to V
CM
15.77 15.82 V
−40°C ≤ T
A
≤ +125°C 15.70 V
Output Voltage Low V
OL
R
L
= 10 kΩ to V
CM
30 40 mV
−40°C ≤ T
A
≤ +125°C 60 mV
R
L
= 2 kΩ to V
CM
120 140 mV
−40°C ≤ T
A
≤ +125°C 200 mV
Short-Circuit Current I
SC
T
A
= 25°C ±37 mA
Closed-Loop Output Impedance Z
OUT
f = 100 kHz, A
V
= 1 3.0 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 1.25 1.5 mA
−40°C ≤ T
A
≤ +125°C 1.7 mA
DYNAMIC PERFORMANCE
Slew Rate SR R
L
= 10 kΩ, C
L
= 20 pF, A
V
= 1 2 V/μs
Settling Time to 0.1% t
S
V
IN
= 4 V step, C
L
= 20 pF, R
L
= 1 kΩ, A
V
= 1 4 μs
Overload Recovery Time 50 μs
Gain Bandwidth Product GBP R
L
= 2 kΩ, C
L
= 20 pF, A
V
= 1 1.5 MHz
Phase Margin Φ
M
R
L
= 2 kΩ, C
L
= 20 pF, A
V
= 1 74 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