AD628 datasheet(3/24 Pages) AD

3 / 24 page

AD8278/AD8279

Rev. C | Page 3 of 24

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

Grade A

Parameter

Conditions

Min

Typ

Max

Min

Typ

Max

Unit

INPUT CHARACTERISTICS

System Offset1

100

250

μV

Over Temperature

TA = −40°C to +85°C

100

250

μV

vs. Power Supply

VS = ±5 V to ±18 V

2.5

μV/V

Average Temperature

Coefficient

TA = −40°C to +85°C

0.3

μV/°C

Common-Mode Rejection

Ratio (RTI)

VS = ±15 V, VCM = ±27 V,

RS = 0 Ω

Input Voltage Range2

−3 (VS + 0.1)

+3 (VS − 1.5)

−3 (VS + 0.1)

+3 (VS − 1.5)

Impedance3

Differential

120

kΩ

Common Mode

kΩ

DYNAMIC PERFORMANCE

Bandwidth

MHz

Slew Rate

1.1

1.4

1.1

1.4

V/μs

Channel Separation

f = 1 kHz

130

Settling Time to 0.01%

10 V step on output,

CL = 100 pF

μs

Settling Time to 0.001%

μs

GAIN

Gain Error

0.005

0.02

0.01

0.05

Gain Drift

TA = −40°C to +85°C

ppm/°C

Gain Nonlinearity

VOUT = 20 V p-p

ppm

OUTPUT CHARACTERISTICS

Output Voltage Swing4

VS = ±15 V, RL = 10 kΩ

TA = −40°C to +85°C

−VS + 0.2

+VS − 0.2

−VS + 0.2

+VS − 0.2

Short-Circuit Current Limit

±15

Capacitive Load Drive

200

NOISE5

Output Voltage Noise

f = 0.1 Hz to 10 Hz

1.4

μV p-p

f = 1 kHz

nV/√Hz

POWER SUPPLY6

AD8278 Supply Current

200

μA

Over Temperature

TA = −40°C to +85°C

250

μA

AD8279 Supply Current

300

350

300

350

μA

Over Temperature

TA = −40°C to +85°C

400

μA

Operating Voltage Range7

±2

±18

±2

±18

TEMPERATURE RANGE

Operating Range

−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

for details.

Input Voltage Range

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 Figur

through

for details.

e 22

Figure 25

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

and

for details.

Figure 28

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.

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