MAX4208/MAX4209
Ultra-Low Offset/Drift, Precision
Instrumentation Amplifiers with REF Buffer
_______________________________________________________________________________________ 7
OFFSET VOLTAGE DRIFT HISTOGRAM
(T
A
= -20°C TO +85°C)
MAX4208/9 toc02
V
OS
DRIFT (nV/°C)
FREQUENCY (%)
0 50 100 150 200 250 300
25
0
20
15
10
5
-250-200-150-100-50
GAIN ACCURACY HISTOGRAM
MAX4208/9 toc03
GAIN ACCURACY (%)
FREQUENCY (%)
0.250.200.150.100.050-0.05-0.10
50
45
40
35
30
25
20
15
10
5
0
-0.15
A
V
= +100V/V
-30
-20
-10
0
10
20
30
2.0 3.02.5 3.5 4.0 4.5 5.0 5.5 6.0
INPUT OFFSET VOLTAGE
vs. SUPPLY VOLTAGE
MAX4208/9 toc04
SUPPLY VOLTAGE (V)
INPUT OFFSET VOLTAGE (μV)
T
A
= -20°C
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
T
A
= +125°C
-30
-20
-10
0
10
20
30
01234
INPUT OFFSET VOLTAGE
vs. REFIN COMMON-MODE (BUFFER ENABLED)
MAX4208/9 toc06
REFIN COMMON-MODE (V)
INPUT OFFSET VOLTAGE (μV)
T
A
= -20°CT
A
= -40°C
T
A
= +25°C
T
A
= +125°C
T
A
= +85°C
Typical Operating Characteristics
(V
DD
= 5V, V
SS
= 0V, V
CM
= V
REF
= V
DD
/2, V
REFIN/MODE
= V
SS
, R
L
= 100kΩ to V
DD
/2, V
DIFF
= (V
IN+
- V
IN-
) = 0V, MAX4208 set for
G = 100V/V (R1 = 1kΩ, R2 = 99kΩ), T
A
= +25°C, unless otherwise noted.)
INPUT OFFSET VOLTAGE HISTOGRAM
MAX4208/9 toc01
INPUT OFFSET VOLTAGE (μV)
FREQUENCY (%)
20151050-5-10-15
10
5
15
20
25
30
0
-20
A
V
= +100V/V
-30
-20
-10
0
10
20
30
-1 0 1 2 3 4
INPUT OFFSET VOLTAGE
vs. INPUT COMMON-MODE VOLTAGE
MAX4208/9 toc05
INPUT COMMON-MODE VOLTAGE (V)
INPUT OFFSET VOLTAGE (μV)
T
A
= -20°C
T
A
= +25°C
T
A
= +85°C
T
A
= -40°C
T
A
= +125°C
-100
-40
-60
-80
-20
0
20
40
60
80
100
-30 -10-20 0 10 20 30
LINEARITY ERROR
vs. DIFFERENTIAL INPUT VOLTAGE
MAX4208/9 toc07
DIFFERENTIAL INPUT VOLTAGE (mV)
LINEARITY ERROR (ppm)
A
V
= +100V/V
-20
0
40
20
60
80
10 1k100 10k 100k 1M 10M
GAIN vs. FREQUENCY
MAX4208/9 toc08
FREQUENCY (Hz)
GAIN (dB)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX4208/9 toc09
FREQUENCY (Hz)
CMRR (dB)
10k 100k1k100
-120
-100
-80
-60
-40
-20
0
-140
10 1M
