AD8278/AD8279
SPECIFICATIONS
VS = 5 V to 15 V, VREF = 0 V, TA = 25°C, RL = 10 kΩ connected to ground, G = ½ difference amplifier configuration, unless
otherwise noted.
Table 2.
G = ½
Grade B
Typ
Grade A
Typ
Parameter
Conditions
Unit
Min
Max
Min
Max
INPUT CHARACTERISTICS
System Offset1
50
100
100
2.5
50
250
250
5
μV
μV
μV/V
Over Temperature
vs. Power Supply
TA = −40°C to +85°C
VS = 5 V to 18 V
Average Temperature
Coefficient
TA = −40°C to +85°C
0.3
1
2
5
μV/°C
Common-Mode Rejection
Ratio (RTI)
Input Voltage Range2
Impedance3
VS = 15 V, VCM = 27 V,
RS = 0 Ω
80
74
dB
V
−3 (VS + 0.1)
+3 (VS − 1.5)
−3 (VS + 0.1)
+3 (VS − 1.5)
Differential
120
30
120
30
kΩ
kΩ
Common Mode
DYNAMIC PERFORMANCE
Bandwidth
Slew Rate
Channel Separation
Settling Time to 0.01%
1
1.4
130
1
1.4
130
MHz
V/μs
dB
1.1
1.1
f = 1 kHz
10 V step on output,
CL = 100 pF
9
10
9
10
μs
μs
Settling Time to 0.001%
GAIN
Gain Error
Gain Drift
Gain Nonlinearity
OUTPUT CHARACTERISTICS
Output Voltage Swing4
0.005 0.02
0.01
0.05
5
12
%
TA = −40°C to +85°C
VOUT = 20 V p-p
1
7
ppm/°C
ppm
VS = 15 V, RL = 10 kΩ
TA = −40°C to +85°C
−VS + 0.2
+VS − 0.2
−VS + 0.2
+VS − 0.2
V
Short-Circuit Current Limit
Capacitive Load Drive
NOISE5
15
200
15
200
mA
pF
Output Voltage Noise
f = 0.1 Hz to 10 Hz
f = 1 kHz
1.4
47
1.4
47
ꢀV p-p
nV/√Hz
50
50
POWER SUPPLY6
AD8278 Supply Current
Over Temperature
AD8279 Supply Current
200
250
350
400
18
200
250
350
400
18
ꢀA
ꢀA
ꢀA
ꢀA
V
TA = −40°C to +85°C
TA = −40°C to +85°C
300
300
Over Temperature
Operating Voltage Range7
TEMPERATURE RANGE
Operating Range
2
2
−40
+125
−40
+125
°C
1 Includes input bias and offset current errors, RTO (referred to output).
2 The input voltage range may also be limited by absolute maximum input voltage or by the output swing. See the Input Voltage Range for details.
3 Internal resistors are trimmed to be ratio matched and have 20% absolute accuracy.
4 Output voltage swing varies with supply voltage and temperature. See Figure 22 through Figure 25 for details.
5 Includes amplifier voltage and current noise, as well as noise from internal resistors.
6 Supply current varies with supply voltage and temperature. See Figure 26 and Figure 28 for details.
7 Unbalanced dual supplies can be used, such as −VS = −0.5 V and +VS = +2 V. The positive supply rail must be at least 2 V above the negative supply and reference
voltage.
Rev. C | Page 3 of 24