Datasheet

AD8235
Rev. 0 | Page 3 of 20
SPECIFICATIONS
+V
S
= 5 V, −V
S
= 0 V (GND), V
REF
= 2.5 V, T
A
= 25°C, G = 5, R
LOAD
= 100 k to GND, SDN pin tied to +V
S
, unless otherwise noted.
Table 1.
Parameter Test Conditions Min Typ Max Unit
COMMON-MODE REJECTION RATIO (CMRR) V
S
= ±2.5 V, V
REF
= 0 V
CMRR DC V
CM
= −1.8 V to +1.8 V
G = 5 90 94 dB
G = 10 90 100 dB
G = 100 100 110 dB
G = 200 100 110 dB
NOISE
Voltage Noise Spectral Density, RTI f = 1 kHz, G = 5 76 nV/√Hz
RTI, 0.1 Hz to 10 Hz
G = 5 4 μV p-p
G = 200 4 μV p-p
Current Noise 15 fA/√Hz
VOLTAGE OFFSET
Input Offset, V
OS
2.5 mV
Average Temperature Coefficient (TC) −40°C to +125°C 0.7 μV/°C
Offset RTI vs. Supply (PSR) V
S
= 1.8 V to 5 V
G = 5 100 120 dB
G = 10 110 126 dB
G = 100 110 130 dB
G = 200 110 130 dB
INPUT CURRENT
Input Bias Current 1 50 pA
Overtemperature −40°C to +85°C 100 pA
−40°C to +125°C 600 pA
Input Offset Current 0.5 25 pA
Overtemperature −40°C to +85°C 50 pA
−40°C to +125°C 130 pA
DYNAMIC RESPONSE
Small Signal Bandwidth, −3 dB
G = 5 23 kHz
G = 10 9 kHz
G = 100 0.8 kHz
G = 200 0.4 kHz
Settling Time 0.01% V
OUT
= 4 V step
G = 5 444 μs
G = 10 456 μs
G = 100 992 μs
G = 200 1816 μs
Slew Rate
G = 5 to 100 9 mV/μs