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PDF AM452 Data sheet ( Hoja de datos )
| Número de pieza | AM452 | |
| Descripción | Voltage-to-current transducer IC | |
| Fabricantes | Analog Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AM452 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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www.DataSheet.co.kr
AM452 – Voltage-to-current transducer IC
with a differential input
PRINCIPLE FUNCTION
Amplification and conversion of differential input voltages (±400mV with a CMIR
of 1.5 – VCC-3V) into an adjustable current output of 0/4...20mA, for example. The
offset and maximum output currents are independently adjustable in a wide range.
The IC is suitable for both 2- and 3-wire applications and as a HART® carrier IC.
VCC = 6…35V
Differential input
± 400mV
AM452
IOUT = z.B.0/4...20mA
VREF= 5/10V
IS = max 10mA
TYPICAL APPLICATIONS
Transducers for differential input signals in current output values for:
• Transducers for sensor applications with an internal sensing element supply
• Drivers for the analog industrial power grid (e.g. remote display in current loop operation)
• Differential impedance converters
• Carrier for standard HART® protocol communications
• Modular signal conditioning with digital correction (Frame concept [1])
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Phone: +49 (0)6131/91 073-0
Fax: +49 (0)6131/91 073-30
Internet: http://www.analogmicro.de
Email: info@analogmicro.de
February 2008 - Rev 1.2 - Page 1/21
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
AM452 – Voltage-to-current transducer IC
with a differential input
Parameter
Instrumentation Amplifier (cont.)
Internal Gain
Differential Input Voltage Range
Common Mode Input Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Offset Voltage
VOS vs. Temperature
Input Bias Current
IB vs. Temperature
Output Voltage
Minimum Output Voltage
Load Capacitance
Zero Adjust Stage
Internal Gain
Zero Adjust Voltage
Symbol
GIA
VIN
CMIR
CMIR
CMRR
PSRR
VOS
dVOS/dT
IB
dIB/dT
VOUTIA
VOUTIA
VOUTIAmin
CL
GZA
VZA
Offset Voltage
VOS
VOS vs. Temperature
dVOS/dT
Input Bias Current
IB vs. Temperature
IB
dIB/dT
Operational Amplifier – Gain Stage (OP1)
Adjustable Gain
Input Range
GGAIN
IR
IR
Power Supply Rejection Ratio
PSRR
Offset Voltage
VOS vs. Temperature
VOS
dVOS/dT
Input Bias Current
IB vs. Temperature
Output Voltage Limitation
Output Voltage Range
IB
dIB/dT
VLIM
VOP
VOP
Load Capacitance
CL
Conditions
VCC < 9V, ICV < 2mA
VCC ≥ 9V, ICV < 2mA
VCC < 9V
VCC ≥ 9V
VZA ≤ VOUTIAmax – GIA ∆VIN ; Vcc<9V,
∆VIN=400mV, GIA=5
VZA ≤ VOUTIAmax – GIA ∆VIN; Vcc≥9V,
∆VIN =400mV, GIA=5
VCC < 10V
VCC ≥ 10V
VCC < 10V
VCC ≥ 10V
NB: The current in the IC is given as a negative quantity.
Min.
4.9
0
1.5
1.5
80
80
-9.0
0.94
0
0
1
0
0
80
-3.0
0
0
Typ.
Max.
Unit
5
90
90
-1.5
±5
–100
–0.4
4.5
5.1
±400
VCC – 3
6.0
+6.0
–250
–0.9
VCC – 4
5
16
250
mV
V
V
dB
dB
mV
µV/°C
nA
nA/°C
V
V
mV
pF
1 1.06
Vcc-6
V
3V
±0.5 ±2.0
mV
±1.6 ±5 µV/°C
47 120 nA
18 30 pA/°C
VCC – 5
5
V
V
90 dB
-1.0 1.0
mV
±3 ±7 µV/°C
10 25 nA
7 20 pA/°C
VREF
VCC – 5
VREF
V
V
V
250 pF
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Phone: +49 (0)6131/91 073-0
Fax: +49 (0)6131/91 073-30
Internet: http://www.analogmicro.de
Email: info@analogmicro.de
February 2008 - Rev 1.2 - Page 5/21
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
AM452 – Voltage-to-current transducer IC
with a differential input
Differences in the AM452 circuitry with 2- and 3-wire applications
SET Stage
V/I Converter
11
10
9
8
14
VS
C2
R0
T1
D1
2-wire
connection
R5
GND
IOUT
RL
Ground
3-wire connection
VS
SET Stage
V/I Converter
11 R0
10
9
8 T1
D1
R5
14
GND
IOUT
RL
Ground
Figure 4: Differences in 2-and 3-wire circuitry in conjunction with AM452
AM452 is constructed in such a way that by changing the external circuitry it is suitable for
both 2-wire and 3-wire operation.
In 3-wire operation (see Figure 4, right) the IC's connection to ground (pin 14 or GND) is
connected to the system ground (Ground) which is applied externally. System supply voltage
VS is connected to pin 10 (VCC) and pin VCC to pin 11 (RS+). Supply current ICC then flows
directly into AM452 (power consumption).
In 2-wire operation (see Figure 4, left) system supply voltage VS is connected to pin 11 (RS+)
and pin 10 (VCC) to pin 9 (RS-). The overall current including the supply current then flows
via R0, enabling the relevant voltage drop to be used to regulate transistor T1.
The IC's connection to ground pin 14 (GND) is contacted to the node between resistor R5 and
load resistor RL (current output IOUT). IC ground GND is thus not the same as the ground of
the system (Ground). The output signal is tapped via load resistor RL which links system
output IOUT to the ground of the system.
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Phone: +49 (0)6131/91 073-0
Fax: +49 (0)6131/91 073-30
Internet: http://www.analogmicro.de
Email: info@analogmicro.de
February 2008 - Rev 1.2 - Page 11/21
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet AM452.PDF ] | |
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