AM417 – Ratiometric instrumentation

amplifier with adjustable output stage

Analog Microelectronics GmbH

An der Fahrt 13, D – 55124 Mainz

July 2008 –Rev 3.1- Page 5/18

Phone:+49 (0)6131/91 073-0

Fax: +49 (0)6131/91 073-30

Email: info@analogmicro.de

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Voltage Output Stage

Adjustable Gain

2

11

Input Voltage Range

0.05

2.25V

V

Input Current

20

75

nA

Input Offset Voltage

-3

3

mV

-15

15

µV/°C

-100

0

µV/°C

Output Current

Pin VOUT

65

150

350

µA

Output Voltage Range

With external transistor*

0.5

4.5

V

Output Current

With external transistor*

11

mA

Output Resistance

With external transistor*

0.1

0.85

Ω

Power Supply Rejection Ratio

PSRR

-72

-90

dB

Current Limitation Threshold

1.00

1.15

V

-40...+125°C without external transistor*

-4.2

-1.8

mV/°C

System Parameters

Input Voltage Range

0

0

40

200

mV

mV

Gain Bandwidth Product

GBW

400

1,500

kHz

Nonlinearity

NL

0.15

%FS

Table 1: Electrical specifications

System parameters: specifications which refer to the AM417 circuit as a whole.

BOUNDARY CONDITIONS / EXTERNAL COMPONENTS

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Resistor Adjustment Current Source

400

1000

Ω

Resistor Sense Current Limitation

0

50

Ω

Gain Resistor Sum

0:41

2.1

kΩ

Capacitor Power Supply

100

330

nF

Capacitor Frequency Compensation

X7R capacitor ,

±10%

4.7

4,7

nF

Capacitor Load

X7R capacitor ,

±10%

1.0

10.0

nF

Output PNP Transistor

e.g. BCW68H or BC557C, low drop,

180

Table 2: Electrical boundary conditions