AM417 Datasheet, PDF (5/18 Pages) Analog Microelectronics – RATIOMETRIC VOLTAGE TRANSMITTER

AM417 – Ratiometric instrumentation
amplifier with adjustable output stage
Parameter
Voltage Output Stage
Adjustable Gain
Input Voltage Range
Input Current
Input Offset Voltage
V_OS vs. temperature
V_OS vs. temperature
Output Current
Output Voltage Range
Output Current
Output Resistance
Power Supply Rejection Ratio
Current Limitation Threshold
V_TRESH vs. Temperature
Symbol
Conditions
G_OUT
V_VR
I_IN
V_OS
dV_OS/dT
dV_OS/dT
I_VOUT
V_OUT
I_OUT
R_OUT
PSRR
V_THRESH
dV_THRESH/dT
V_IN– = 2V, ∆V_IN = 50mV
V_IN– = 2V, ∆V_IN = 50mV,
T_amb = -40…100°C
V_IN– = 2V, ∆V_IN = 50mV,
T_amb = 100…125°C
Pin VOUT
With external transistor*
With external transistor*
With external transistor*
V_THRESH = V_VCC – V_VOUTmin
R₂ = 27Ω, I_OUT ≈ 14mA
-40...+125°C without external transistor*
Min.
Typ.
Max.
Unit
2
11
0.05
V_CC–
V
2.25V
20
75
nA
-3
3
mV
-15
15
µV/°C
-100
0
µV/°C
65
150
350
µA
0.5
4.5
V
11
mA
0.1
0.85
Ω
-72
-90
dB
1.00
1.15
V
-4.2
-1.8
mV/°C
System Parameters
Input Voltage Range
Gain Bandwidth Product
Nonlinearity
∆V_IN
∆V_IN
GBW
NL
@ V_OUTmax = 4.5V and G_OUT = 10
@ V_OUTmax = 4.5V and G_OUT = 2
C_OUT = 1nF
Table 1: Electrical specifications
0
40
mV
0
200
mV
400
1,500
kHz
0.15
%FS
System parameters: specifications which refer to the AM417 circuit as a whole.
* Output current dependent on resistor R₂ (see Equation 4).
BOUNDARY CONDITIONS / EXTERNAL COMPONENTS
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Resistor Adjustment Current Source
Resistor Sense Current Limitation
Gain Resistor Sum
Capacitor Power Supply
Capacitor Frequency Compensation
Capacitor Load
Output PNP Transistor
R₁
400
1000
Ω
R₂
0
50
Ω
R₃ + R₄
V_OUT = (R₃ + R₄)/R₄ G_IA
0:41
2.1
kΩ
C₁
100
330
nF
C₂
X7R capacitor , ±10%
4.7
4,7
nF
C₃
X7R capacitor , ±10%
1.0
10.0
nF
β_T1
e.g. BCW68H or BC557C, low drop, 180
high β for T_amb = -40….125°C
Table 2: Electrical boundary conditions
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Phone:[phone]
Fax: [phone]
Internet: http://www.analogmicro.de
Email: [e-mail]
July 2008 –Rev 3.1- Page 5/18