Datasheet

AD8502/AD8504
Rev. A | Page 4 of 16
Parameter Symbol Conditions Min Typ Max Unit
NOISE PERFORMANCE
Peak-to-Peak Noise 0.1 Hz to 10 Hz 6 μV p-p
Voltage Noise Density e
n
f = 1 kHz 190 nV/√Hz
Current Noise Density i
n
f = 1 kHz 0.1 pA/√Hz
@ V
S
= 1.8 V, V
CM
= V
S
/2, T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage V
OS
0 V < V
CM
< 1.8 V 0.5 3 mV
−40°C < T
A
< +85°C 5 mV
−40°C < T
A
< +125°C 5.5 mV
Offset Voltage Drift ∆V
OS
/∆T −40°C < T
A
< +85°C 7 μV/°C
−40°C < T
A
< +125°C 5 μV/°C
Input Bias Current I
B
0 V < V
CM
< 1.8 V 1 10 pA
−40°C < T
A
< +85°C 100 pA
−40°C < T
A
< +125°C 600 pA
Input Offset Current I
OS
0 V < V
CM
< 1.8 V 0.5 5 pA
−40°C < T
A
< +85°C 50 pA
−40°C < T
A
< +125°C 100 pA
Input Voltage Range IVR 0 1.8 V
Common-Mode Rejection Ratio CMRR 0 V < V
CM
< 1.8 V 59 75 dB
−40°C < T
A
< +85°C 56 dB
−40°C < T
A
< +125°C 55 dB
Large Signal Voltage Gain A
VO
0.1 V < V
OUT
< 1.7 V; R
LOAD
= 1 MΩ 88 110 dB
0.1 V < V
OUT
< 1.7 V; −40°C < T
A
< +85°C 80 dB
0.1 V < V
OUT
< 1.7 V; −40°C < T
A
< +125°C 65 dB
Input Capacitance C
DIFF
2 pF
C
CM
4.5 pF
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
R
LOAD
= 100 kΩ to GND 1.79 1.795 V
−40°C < T
A
< +85°C 1.78 V
−40°C to +125°C 1.77 V
R
LOAD
= 10 kΩ to GND 1.75 1.764 V
−40°C < T
A
< +85°C 1.70 V
−40°C to +125°C 1.65 V
Output Voltage Low V
OL
R
LOAD
= 100 kΩ to V
S
1.0 5 mV
−40°C < T
A
< +85°C 6 mV
−40°C to +125°C 7 mV
R
LOAD
= 10 kΩ to V
S
10 20 mV
−40°C < T
A
< +85°C 28 mV
−40°C to +125°C 29 mV
Short-Circuit Current I
SC
±5 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR 1.8 V < V
S
< 5 V 85 105 dB
−40°C < T
A
< +85°C 66 dB
−40°C < T
A
< +125°C 66 dB
Supply Current/Amplifier I
SY
V
O
= V
S
/2 0.65 1 μA
−40°C < T
A
< +85°C 1.5 μA
−40°C < T
A
< +125°C 2 μA