AD8278ARMZ-R7 datasheet(6/24 Pages) AD

6 / 24 page

AD8278

Rev. 0 | Page 6 of 24

VS = +2.7 V to <±5 V, VREF = midsupply, TA = 25°C, RL = 10 kΩ connected to midsupply, G = 2 difference amplifier configuration, unless

otherwise noted.

Table 5.

Parameter

Conditions

G = 2

Unit

Grade B

Grade A

Min

Typ

Max

Min

Typ

Max

INPUT CHARACTERISTICS

System Offset1

150

300

150

500

μV

vs. Temperature

TA = −40°C to +85°C

300

500

μV

Average Temperature

Coefficient

TA = −40°C to +85°C

0.6

μV/°C

vs. Power Supply

VS = ±5 V to ±18 V

μV/V

Common-Mode Rejection

Ratio (RTI)

VS = 2.7 V, VCM = 0 V

to 2.4 V, RS = 0 Ω

VS = ±5 V, VCM = −10 V

to +7 V, RS = 0 Ω

Input Voltage Range2

−1.5(VS + 0.1)

+1.5(VS − 1.5) −1.5(VS + 0.1)

+1.5(VS − 1.5) V

Impedance3

Differential

120

kΩ

Common Mode

kΩ

DYNAMIC PERFORMANCE

Bandwidth

450

kHz

Slew Rate

1.3

V/μs

Settling Time to 0.01%

2 V step on output,

CL = 100 pF, VS = 2.7 V

μs

GAIN

Gain Error

0.005

0.02

0.01

0.05

Gain Drift

TA = −40°C to +85°C

ppm/°C

OUTPUT CHARACTERISTICS

Output Swing4

RL = 10 kΩ,

TA = −40°C to +85°C

−VS + 0.1

+VS − 0.15

−VS + 0.1

+VS − 0.15

Short-Circuit Current Limit

±10

Capacitive Load Drive

200

NOISE5

Output Voltage Noise

f = 0.1 Hz to 10 Hz

2.8

μV p-p

f = 1 kHz

100

nV/√Hz

POWER SUPPLY

Supply Current6

TA = −40°C to +85°C

200

220

μA

Operating Voltage Range

2.0

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

section in the

section for details.

Input Voltage Range

Theory of Operation

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 20

Figure 23

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 26

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