|
|
PDF ACS709 Data sheet ( Hoja de datos )
| Número de pieza | ACS709 | |
| Descripción | Fast Fault Response Current Sensor IC | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ACS709 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
ACS709
High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
Features and Benefits
▪ Industry-leading noise performance with 120 kHz
bandwidth through proprietary amplifier and filter
design techniques
▪ Integrated shield greatly reduces capacitive coupling
from current conductor to die due to high dV/dt, and
prevents offset drift in high-side applications
▪ Small footprint surface mount QSOP24 package
▪ 2100 VRMS isolation voltage between primary current
path and sensor IC electronics
▪ 1.1 mΩ primary conductor resistance for low power loss
▪ User-settable Overcurrent Fault level
▪ Overcurrent Fault signal typically responds to an
overcurrent condition in < 2 μs
▪ Filter pin capacitor sets analog signal bandwidth
▪ ±2% typical output error
▪ 3 to 5.5 V, single supply operation
▪ Factory trimmed sensitivity, quiescent output voltage,
and associated temperature coefficients
▪ Chopper stabilization results in extremely stable
quiescent output voltage
▪ Ratiometric output from supply voltage
Package: 24 pin QSOP (suffix LF)
Approximate Scale
www.DataSheet4U.com
Description
The Allegro® ACS709 current sensor IC provides economical
and precise means for current sensing applications in industrial,
automotive, commercial, and communications systems. The
device is offered in a small footprint surface mount package
that allows easy implementation in customer applications.
TheACS709 consists of a precision linear Hall sensor integrated
circuit with a copper conduction path located near the surface
of the silicon die. Applied current flows through the copper
conduction path, and the analog output voltage from the Hall
sensor IC linearly tracks the magnetic field generated by the
applied current. The accuracy of the ACS709 is maximized
with this patented packaging configuration because the Hall
element is situated in extremely close proximity to the current
to be measured.
High level immunity to current conductor dV/dt and stray
electric fields, offered by Allegro proprietary integrated shield
technology, guarantees low output ripple and low offset drift
in high-side applications.
The voltage on the Overcurrent Input (VOC pin) allows
customers to define an overcurrent fault threshold for the
device.When the current flowing through the copper conduction
path (between the IP+ and IP– pins) exceeds this threshold,
Continued on the next page…
Typical Application
1 IP+
NC 24
2 IP+
3 IP+
NC
FAULT_EN
23
22
Fault_EN
VCC
RH
4
5
IP+
IP+
ACS709
VOC
VCC
21
20
RL
IP
6 IP+
7 IP–
FAULT 19
VIOUT 18
COC
330 kΩ
B
0.1 μF
8 IP–
FILTER 17 VIOUT
9 IP–
VZCR 16
CF
10 IP–
11 IP–
GND 15
NC 14
1 nF
A
12 IP–
NC 13
RH, RL
CF
COC
A
Sets resistor divider reference for VOC
Noise and bandwidth limiting filter capacitor
Fault delay setting capacitor, 22 nF maximum
Use of capacitor required
B Use of resistor optional
ACS709-DS
1 page  
ACS709
High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
COMMON OPERATING CHARACTERISTICS (continued) Valid at TA = –40°C to 150°C, VCC= 5 V, unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max. Units
OVERCURRENT CHARACTERISTICS (continued)
Overcurrent Fault Response Time
Overcurrent Fault Reset Delay
Overcurrent Fault Reset Hold Time
tOC
tOCR
tOCH
Switchpoint set at 90% of IPOA,
delay from IP exceeding overcurrent
fault threshold to V ¯F¯¯A¯U¯¯L¯¯T¯ < 0.4 V, without
external COC capacitor
Time from VFAULTEN < VIL to
VFAULT > 0.8 × VCC , RPU = 330 kΩ
Time from VFAULTEN pin < VIL to reset of
fault latch; see Functional Block Diagram
–
–
–
1.9 – μs
500 – ns
250 – ns
Overcurrent Input Pin Resistance
VOLTAGE REFERENCE CHARACTERISTICS
ROC
TA = 25°C, VOC pin to GND
2 – – MΩ
Voltage Reference Output
Voltage Reference Output Load Current
VZCR
IZCR
TA = 25 °C
Source current
Sink current
–
0.5 × VCC
–
V
3 – – mA
50 – – μA
Voltage Reference Output Drift
∆VZCR
– ±10 – mV
1Devices are trimmed for maximum accuracy at VCC = 5 V. The ratiometry feature of the device allows operation over the full VCC range; however, accuracy
may be slightly degraded for VCC values other than 5 V. Contact the Allegro factory for applications that require maximum accuracy for VCC = 3.3 V.
2RF(INT) forms an RC circuit via the FILTER pin.
3This parameter can drift by as much as 0.25% over the lifetime of this product.
4This parameter can drift by as much as 0.3% over the lifetime of this product.
5Calculated using the formula f3dB = 0.35 / tr.
6See page 8 on how to set overcurrent fault switchpoint.
7Switchpoint can be lower at the expense of switchpoint accuracy.
8This error specification does not include the effect of noise. See the INCOMP specification in order to factor in the additional influence of noise on the
fault switchpoint.
www.DataSheet4U.com
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
5 Page 
ACS709
High Bandwidth, Fast Fault Response Current Sensor IC
In Thermally Enhanced Package
Setting Overcurrent Fault Switchpoint
The VOC needed for setting the overcurrent fault
switchpoint can be calculated as follows:
VOC = Sens × | IOC | ,
where VOC is in mV, Sens in mV/A, and IOC (overcur-
rent fault switchpoint) in A.
| Ioc | is the overcurrent fault switchpoint for a bi-
directional (AC) current, which means a bi-directional
device will have two symmetrical overcurrent fault
switchpoints, +IOC and –IOC.
See the following graph for IOC and VOC ranges.
IOC
0.4 VCC / Sens
0.25 VCC / Sens
www.DataSheet4U.com
0
– 0.25 VCC / Sens
– 0.4 VCC / Sens
IOC versus VOC
0. 25 VCC
Not in Valid Range
In Valid Range
0. 4 VCC
VOC
Example: For ACS709LLFTR-35BB-T, if required overcurrent fault switchpoint is 50 A, and VCC = 5 V, then the
required VOC can be calculated as follows:
VOC = Sens × IOC = 28 × 50 = 1400 (mV)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ACS709.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ACS704ELC-005 | Fully Integrated / Hall Effect-Based Linear Current Sensor | Allegro MicroSystems |
| ACS704ELC-015 | Fully Integrated / Hall Effect-Based Linear Current Sensor | Allegro MicroSystems |
| ACS706ELC-05C | Hall Effect Based Linear Current Sensor | Allegro MicroSystems |
| ACS706ELC-20A | Hall Effect Based Linear Current Sensor | Allegro MicroSystems |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |