AM417资料
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RATIOMETRIC VOLTAGE TRANSMITTERAM417
analog microelectronics
April 99
Analog Microelectronics GmbHPhone:+49 (0)6131/91 073 – 01/6
An der Fahrt 13, D – 55124 MainzFax:
+49 (0)6131/91 073 – 30 Rev. 2.1
Internet:www.analogmicro.deE–Mail:info@analogmicro.deFEATURES
• Supply Voltage 5V±5% (Ratio Range)
• Wide Operating Temperature Range:
–40°C...+100°C
• Ratiometrical Current Source for
Transducer Excitation
• Instrumentation Amplifier Input
• Voltage Output Driver
Open Collector:
V
OUT = 0.5–4.5V
I
OUT = +10mA
• Adjustable Gain, Offset, and Output
Voltage Range
• Small Package Dimensions: SO8
• Low Cost
APPLICATIONS
•
Industrial Process Control
• Automotive Applications
• Sensor TransmitterGENERAL DESCRIPTION
The AM417 is a low cost ratiometrical voltage
transmitter, designed for flexible bridge input
signal conditioning. The IC contains a ra-
tiometric current source for transducer excita-
tion, a high accuracy instrumentation amplifier
for differential input signals, and a voltage out-
put driver. Gain, offset, and output voltage
range are adjustable by external resistors. The
voltage output stage is designed as an open col-lector stage. The output current is +10mA. A
simple current limitation is possible by adding
an external resistor. With its functional blocks
and possibilities to adjust all important pa-
rameters for sensor calibration, the small pack-
age dimensions (SO8), and the low costs the
AM417 is ideally suited for automotive sensor
interface applications.
DELIVERY
• DIL8 packages (samples)
• SOP8 packages
• Dice on 5“ blue foil
BLOCK DIAGRAM
IA
RBVOUTIN+
IN−4
58
7
1AM417
IB
2
Output
Stage
GND63VCC9R
1RIBR
OP
VRV
CC
Figure 1元器件交易网www.cecb2b.com
RATIOMETRIC VOLTAGE TRANSMITTERAM417
analog microelectronics
April 99
2/6ELECTRICAL SPECIFICATIONS
T
amb = 25°C, V
CC = 5V (unless otherwise noted)ParameterSymbolConditionsMin.Typ.Max.Unit
Voltage Range (Ratio Range)VCC4.7555.25V
Maximum Supply VoltageVCCmax6V
Quiescent CurrentICCRRB = 500Ω, IIB = 1mA6.2mA
Temperature Specifications
OperatingTamb–40100°C
StorageTst–55125°C
JunctionTJ150°C
Thermal ResistanceΘjaDIL8 plastic package110°C/W
ΘjaSO8 plastic package180°C/W
Ratiometric Current Source – Transducer
Internal Sense VoltageVRBratiometric with VCC, VVCC = 5V0.5V
Output Current RangeIIB0.501.25mA
Output CurrentIIBratiometric with VCC,
RRB = 500Ω, VVCC = 5V0.9811.02mA
Ratiometric ErrorRAT@IBVVCC = 5.25V,
RAT@IB = 1.05 VRB (VVCC = 5V)
– VRB (VVCC = 5.25V)±1mV
IRB vs. TemperaturedIRB/dTIIB = 1mA±20ppm/°C
Output Voltage RangeVIBIIB = 1.25mA1.5VCC–0.5V
Output ResistanceRIBIIB = 1mA, RIB = ∆UIB/∆IIB,
VVIB = 5V, IIB = 1mA1.54.5MΩ
Power Supply Rejection Ratio∆IIB∆VCC = 4.75V – 5.25V,
VVIB = 5V, IIB = 1mA7690dB
Instrumentation Amplifier
Input Voltage RangeVIN+;–1.5VCC–2V
Internal GainGIAVIN– = 2V, ∆VIN = 200mV
GIA = ∆VVIA/∆VIN9.810.010.2
Common Mode Rejection RatioCMRR8090dB
Power Supply Rejection RatioPSRR7480dB
Offset VoltageVOS±3mV
VOS vs. TemperaturedVOS/dT±10µV/°C
Input Bias CurrentIBVIN = 2V2575nA
Output Voltage RangeVVIA0VCC–2V
Output ResistanceROUT20kΩ
Nonlinearity∆VIN = 200mV, ideal input0.1% FS
Voltage Output Stage
Adjustable GainGOUT211
Input Voltage RangeVVR0VCC–2.5V
Power Supply Rejection RatioPSSR–72–90dB
Offset VoltageVOS±3.0mV
VOS vs. TemperaturedVOS/dT∆VIN = 50mV±15µV/°C
Input CurrentIIN∆VIN = 50mV2075nA
Output Voltage RangeVOUTwith transistor BCW68H
IOUT = 10mA (see figure 5)0.54.5V元器件交易网www.cecb2b.com
RATIOMETRIC VOLTAGE TRANSMITTERAM417
analog microelectronics
April 99
3/6ParameterSymbolConditionsMin.Typ.Max.Unit
Voltage Output Stage (cont.)
Output CurrentIOUTwith transistor BCW68H12.5mA
Output Current Pin VOUTIVOUTpin VOUT100200300µA
Current Limitation ThresholdVTHRESHVTHRESH = VVCC – VVOUTmin,
R2 = 27Ω, IOUT ≈ 14mA120150180mV
VTHRESH vs. TemperaturedVTHRESH /dT–40...+100°C1.001.15mV
Output ResistanceROUTvirtual0.10.85ΩLinearityideal input0.01%FS
BOUNDARY CONDITIONS
ParameterSymbolConditionsMin.Typ.Max.Unit
Resistor Adjustment Current Source (Transducer)R14001000Ω
Gain Resistor SumR3 + R42.0kΩ
Capacitor Power SupplyC1100nF
Capacitor Frequency Compensation (Output Stage)C24.35.8nF
Capacitor Load (Output Stage)C31.010.0nF
Resistor Sense Current LimitationR2050Ω
FUNCTIONAL DIAGRAM
AMPIBRV
S
GroundV
OUTGAIN = 20...110(ratriometrical)
Figure 2元器件交易网www.cecb2b.com
