Datasheet

ADA4505-1/ADA4505-2/ADA4505-4
Rev. D | Page 3 of 24
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS—1.8 V OPERATION
V
SY
= 1.8 V, V
CM
= V
SY
/2, T
A
= 25°C, R
L
= 100 k to GND, unless otherwise specified.
Table 1.
Parameter Symbol Test Conditions/Comments 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
≤ +125°C 4 mV
Input Bias Current I
B
0.5 2 pA
−40°C ≤ T
A
≤ +85°C 50 pA
−40°C ≤ T
A
≤ +125°C 375 pA
Input Offset Current I
OS
0.05 1 pA
−40°C ≤ T
A
≤ +85°C 25 pA
−40°C ≤ T
A
≤ +125°C 130 pA
Input Voltage Range −40°C ≤ T
A
≤ +125°C 0 1.8 V
Common-Mode Rejection Ratio CMRR 0 V ≤ V
CM
≤ 1.8 V 85 100 dB
−40°C ≤ T
A
≤ +85°C 85 dB
−40°C ≤ T
A
≤ +125°C 80 dB
Large Signal Voltage Gain A
VO
0.05 V ≤ V
OUT
≤ 1.75 V,
R
L
= 100 kΩ to V
CM
95 115 dB
−40°C ≤ T
A
≤ +125°C 95 dB
Offset Voltage Drift
ΔV
OS
/ΔT
−40°C ≤ T
A
≤ +125°C 2.5 μV/°C
Input Resistance R
IN
220 GΩ
Input Capacitance Differential Mode C
INDM
2.5 pF
Input Capacitance Common Mode C
INCM
4.7 pF
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
R
L
= 100 kΩ to GND 1.78 1.79 V
−40°C ≤ T
A
≤ +125°C 1.78 V
R
L
= 10 kΩ to GND 1.65 1.75 V
−40°C ≤ T
A
≤ +125°C 1.65 V
Output Voltage Low V
OL
R
L
= 100 kΩ to V
SY
2 5 mV
−40°C ≤ T
A
≤ +125°C 5 mV
R
L
= 10 kΩ to V
SY
12 25 mV
−40°C ≤ T
A
≤ +125°C 25 mV
Short-Circuit Limit I
SC
V
OUT
= V
SY
or GND ±3.8 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR V
SY
= 1.8 V to 5 V 100 110 dB
−40°C ≤ T
A
≤ +85°C 100 dB
−40°C ≤ T
A
≤ +125°C 95 dB
Supply Current per Amplifier I
SY
V
OUT
= V
SY
/2
ADA4505-1 10 11.5 μA
–40°C ≤ T
A
≤ +125°C 15 μA
ADA4505-2/ADA4505-4 7 10 μA
−40°C ≤ T
A
≤ +125°C 15 μA
DYNAMIC PERFORMANCE
Slew Rate SR R
L
= 100 kΩ, C
L
= 20 pF, G = 1 6.5 mV/μs
Gain Bandwidth Product GBP R
L
= 1 MΩ, C
L
= 20 pF, G = 1 50 kHz
Phase Margin Φ
M
R
L
= 1 MΩ, C
L
= 20 pF, G = 1 52 Degrees
NOISE PERFORMANCE
Voltage Noise e
n
p-p f = 0.1 Hz to 10 Hz 2.95 μV p-p
Voltage Noise Density e
n
f = 1 kHz 65 nV/√Hz
Current Noise Density i
n
f = 1 kHz 20 fA/√Hz