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PDF DRV401 Data sheet ( Hoja de datos )
| Número de pieza | DRV401 | |
| Descripción | Sensor Signal Conditioning IC | |
| Fabricantes | Burr-Brown | |
| Logotipo |  |
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DRV401
SBVS070A − JUNE 2006 − REVISED OCTOBER 2006
Sensor Signal Conditioning IC for
Closed-Loop Magnetic Current Sensor
FEATURES
D DESIGNED FOR SENSORS FROM
VACUUMSCHMELZE (VAC)
D SINGLE SUPPLY: 5V
D POWER OUTPUT: H-Bridge
D DESIGNED FOR DRIVING INDUCTIVE LOADS
D EXCELLENT DC PRECISION
D WIDE SYSTEM BANDWIDTH
D HIGH-RESOLUTION, LOW-TEMPERATURE
DRIFT
D BUILT-IN DEGAUSS SYSTEM
D EXTENSIVE FAULT DETECTION
D EXTERNAL HIGH-POWER DRIVER OPTION
APPLICATIONS
D GENERATOR/ALTERNATOR MONITORING
AND CONTROL
D FREQUENCY AND VOLTAGE INVERTERS
D MOTOR DRIVE CONTROLLERS
D SYSTEM POWER CONSUMPTION
D PHOTOVOLTAIC SYSTEMS
DESCRIPTION
The DRV401 is designed to control and process signals
from specific magnetic current sensors made by
Vacuumschmelze GmbH & Co. KG (VAC). A variety of
current ranges and mechanical configurations are
available. Combined with a VAC sensor, the DRV401
monitors both ac and dc currents to high accuracy.
Provided functions include: probe excitation, signal
conditioning of the probe signal, signal loop amplifier, an
H-bridge driver for the compensation coil, and an analog
signal output stage that provides an output voltage
proportional to the primary current. It offers overload and
fault detection, as well as transient noise suppression.
The DRV401 can directly drive the compensation coil, or
connect to external power drivers. Therefore, the DRV401
combines with sensors to measure small to very large
currents.
To maintain the highest accuracy, the DRV401 can
demagnetize (degauss) the sensor at power-up and on
demand.
Patents Pending.
Compensation Winding
Primary Winding
Magnetic Core
Field Probe
IP
Compensation
PWM PWM
ICOMP1
ICOMP2
RS
DRV401
Diff
Amp
IS2
IS1
Probe
Interface
Integrator
Filter
H−Bridge
Driver
VOUT
REFIN
Timing, Error Detection,
and Power Control
Degauss
VREF
VREF
+5V GND
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright 2006, Texas Instruments Incorporated
www.ti.com
1 page  
www.ti.com
PIN CONFIGURATIONS
Top View
DRV401
SBVS070A − JUNE 2006 − REVISED OCTOBER 2006
RGW Top View
DWP
ERROR 1
DEMAG 2
GAIN 3
REFOUT
REFIN
4
5
Exposed
Thermal Pad
on Underside,
Connect
to GND1
15 VDD1
14 OVER−RANGE
13 CCdiag
12 VDD2
11 ICOMP1
QFN−20 (5mm x 5mm)
PWM 1
PWM 2
ERROR 3
DEMAG 4
GAIN 5
REFOUT 6
REFIN 7
VOUT 8
IAIN2 9
IAIN1 10
Exposed
Thermal Pad
on Underside,
Connect
to GND1
20 IS1
19 GND1
18 IS2
17 VDD1
16 OVER−RANGE
15 CCdiag
14 VDD2
13 ICOMP1
1 2 ICOMP2
11 GND2
Wide−Body SO−20
NAME
ERROR
DEMAG
GAIN
REFOUT
REFIN
VOUT
IAIN2
IAIN1
GND2
ICOMP2
ICOMP1
VDD2
CCdiag
OVER−RANGE
VDD1
IS2
GND1
IS1
PWM
PWM
Exposed Thermal Pad
PIN ASSIGNMENTS
NO. DESCRIPTION
1 Error flag: open-drain output, see the Error Conditions section.
2 Control input, see the Demagnetization section.
3 Control input for open-loop gain: low = normal, high = −8dB.
4 Output for internal 2.5V reference voltage.
5 Input for zero reference to differential amplifier.
6 Output for differential amplifier.
7 Noninverting input of differential amplifier.
8 Inverting input of differential amplifier.
9 Ground connection. Connect to GND1.
10 Output 2 of compensation coil driver.
11 Output 1 of compensation coil driver.
12 Supply voltage. Connect to VDD1.
13 Control input for wire-break detection: high = enable.
14 Open-drain output for over-range indication: low = over-range.
15 Supply voltage.
16 Probe connection 2.
17 Ground connection.
18 Probe connection 1.
19 PWM output from probe circuit (inverted).
20 PWM output from probe circuit.
— Connect to GND1.
5
5 Page 
DRV401
www.ti.com
SBVS070A − JUNE 2006 − REVISED OCTOBER 2006
TYPICAL CHARACTERISTICS (Continued)
At TA = +25°C and VDD1 = VDD2 = +5V with external 100kHz filter BW, unless otherwise noted.
VOLTAGE REFERENCE POWER−SUPPLY REJECTION
PRODUCTION DISTRIBUTION
OSCILLATOR PRODUCTION DISTRIBUTION
PSR (µV/V)
Minimum Probe Loop Half−Cycle (ns)
310
305
300
295
290
285
280
275
270
265
260
255
250
−50
OSCILLATOR vs TEMPERATURE
−25 0
25 50 75 100 125
Temperature (_C)
150
310
305
300
295
290
285
280
275
270
265
260
255
250
4.3
OSCILLATOR vs SUPPLY VOLTAGE
4.6 4.9 5.2 5.5 5.8 6.0
VDD (V)
4.20
BROWN−OUT VOLTAGE vs TEMPERATURE
4.15
4.10
4.05
4.00
3.95
3.90
3.85
3.80
−50 −25
0
25 50 75 100 125 150
Temperature (_ C)
11
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet DRV401.PDF ] | |
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