Data Sheet

AD8450

Rev. B | Page 3 of 41

SPECIFICATIONS

AVCC = +25 V, AVEE = −5 V; AVCC = +15 V, AVEE = −15 V; DVCC = +5 V; PGIA gain = 26, 66, 133, or 200; PGDA gain = 0.2, 0.27,

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

CURRENT SENSE PGIA

Internal Fixed Gains

26, 66, 133, 200

V/V

Gain Error

±0.1

%

Gain Drift

3

ppm/°C

Gain Nonlinearity

3

ppm

Offset Voltage (RTI)

Gain = 200, ISREFH and ISREFL pins

grounded

−110

+110

µV

Offset Voltage Drift

0.6

µV/°C

Input Bias Current

15

30

nA

Temperature Coefficient

150

pA/°C

Input Offset Current

2

nA

Temperature Coefficient

10

pA/°C

Input Common-Mode Voltage Range

AVEE + 2.3

AVCC − 2.4

V

Over Temperature

AVEE + 2.6

AVCC − 2.6

V

Overvoltage Input Range

AVCC − 55

AVEE + 55

V

Differential Input Impedance

150

GΩ

Input Common-Mode Impedance

150

GΩ

Output Voltage Swing

AVEE + 1.5

AVCC − 1.2

V

Over Temperature

AVEE + 1.7

AVCC − 1.4

V

Capacitive Load Drive

1000

pF

Short-Circuit Current

40

mA

Reference Input Voltage Range

ISREFH and ISREFL pins tied together

AVEE

AVCC

V

Reference Input Bias Current

5

µA

Output Voltage Level Shift

ISREFL pin grounded

Maximum

ISREFH pin connected to VREF pin

17

20

23

mV

Scale Factor

6.8

8

9.2

mV/V

CMRR

Gain = 26

108

dB

Gain = 66

116

dB

Gain = 133

122

dB

Gain = 200

126

dB

Temperature Coefficient

0.01

µV/V/°C

PSRR

Gain = 26

108

122

dB

Gain = 66

116

130

dB

Gain = 133

122

136

dB

Gain = 200

126

140

dB

Voltage Noise

f = 1 kHz

Gain = 26

9

nV/√Hz

Gain = 66

8

nV/√Hz

Gain = 133

7

nV/√Hz

Gain = 200

7

nV/√Hz

Voltage Noise, Peak-to-Peak

f = 0.1 Hz to 10 Hz, all fixed gains

0.2

µV p-p

Current Noise

f = 1 kHz

80

fA/√Hz

Current Noise, Peak-to-Peak

f = 0.1 Hz to 10 Hz

5

pA p-p