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HCPL-0872

P1-P3P4-P6P7-P9P10-P12
4
Solder Reow Temperature Prole
Recommended Pb-Free IR Prole
0
TIME (SECONDS)
TEMPERATURE (˚C)
200
100
50 150100 200 250
300
0
30
SEC.
50 SEC.
30
SEC.
160˚C
140˚C
150˚C
PEAK
TEMP.
245˚C
PEAK
TEMP.
240˚C
PEAK
TEMP.
230˚C
SOLDERING
TIME
200˚C
PREHEATING TIME
150˚C, 90 + 30 SEC.
2.5˚C ± 0.5˚C/SEC.
3˚C + 1˚C/-0.5˚C
TIGHT
TYPICAL
LOOSE
ROOM
TEMPERATURE
PREHEATING RATE 3˚C + 1˚C/-0.5˚C/SEC.
REFLOW HEATING RATE 2.5˚C ± 0.5˚C/SEC.
5
Electrical Specications (DC)
Unless otherwise noted, all Typical specications are at T
A
= 25°C and V
DD
= 5 V, and all Minimum and Maximum
specications apply over the following ranges: T
A
= -40°C to +85°C and V
DD
= 4.5 to 5.5 V.
Absolute Maximum Ratings
Notes:
1. Avago Technologies recommends the use of non-chlorinated solder uxes.
Notes 1. Avago Technologies recommends the use of non-chlorinated solder uxes.
Parameter Symbol Min. Max. Units
Ambient Operating Temperature T
A
-40 85 °C
Supply Voltage V
DD
4.5 5.5 V
Input Voltage All Inputs 0 V
DD
V
Parameter Symbol Min. Typ. Max. Units Test Conditions Fig.
Supply Current I
DD
3 5 mA f
CLK
= 10 MHz
DC Input Current I
IN
0.001 10 µA
Input Logic Low Voltage V
IL
0.8 V
Input Logic High Voltage V
IH
3.6 V
Output Logic Low Voltage V
OL
0.15 0.4 V I
OUT
= 4 mA
Output Logic High Voltage V
OH
4.3 5.0 V I
OUT
= -400 µA
Clock Frequency
(CCLK, MCLK and SCLK)
f
CLK
20 MHz
Clock Period (CCLK, MCLK and SCLK) t
PER
50 ns 2, 3
Clock High Level Pulse Width
(CCLK, MCLK and SCLK)
t
PWH
20 ns 2, 3
Clock Low Level Pulse Width
(CCLK, MCLK and SCLK)
t
PWL
20 ns 2, 3
Setup Time from DAT to Rising Edge
of CLK (CDAT, CCLK, MDAT and MCLK)
t
SUCLK
10 ns 2
DAT Hold Time after Rising Edge
of CLK (CDAT, CCLK, MDAT and MCLK)
t
HDCLK
10 ns 2
Setup Time from Falling Edge
of CLAT to First Rising Edge of CCLK
t
SUCL1
20 ns 2
Setup Time from Last Rising
Edge of CCLK to Rising Edge of CLAT
t
SUCL2
20 ns 2
Delay Time from Falling
Edge of SCLK to SDAT
t
DSDAT
15 ns 3
Setup Time from Data
Ready to First Falling Edge of SCLK
t
SUS
200 ns 3
Setup Time from CHAN
to falling edge of CS
t
SUCHS
20 ns
Reset High Level Pulse Width t
PWR
100 ns
Parameter Symbol Min. Max. Units Note
Storage Temperature T
S
-55 125 °C
Operating Temperature T
A
-40 85 °C
Supply Voltage V
DD
0 5.5 V
Input Voltage All Inputs -0.5 V
DD
+ 0.5 V
Output Voltage All Outputs -0.5 V
DD
+ 0.5 V
Lead Solder Temperature 260°C for 10 sec., 1.6 mm below seating plane 1
Solder Reow Temperature Prole See Reow Thermal Prole
Recommended Operating Conditions
6
Product Description
The Digital Interface IC, HCPL-0872 converts the single-
bit data stream from the Isolated Modulator (such as
HCPL-7860/786J/7560) into fteen-bit output words and
provides a serial output interface that is compatible with
SPI
®
, QSPI
®
, and Microwire
®
protocols, allowing direct con-
nection to a microcontroller. A second multiplexed input
is available to allow measurements with a second isolated
modulator without additional hardware.
The Digital Interface IC, HCPL-0872 can used together
with Isolated Modulator, HCPL-7860/786J/7560 to form
an isolated programmable two-chip analog-to-digital
converter. The primary functions of the HCPL-0872 Digital
Interface IC are to derive a multi-bit output signal by
averaging the single-bit modulator data, as well as to
provide a direct microcontroller interface. The eective
resolution of the multi-bit output signal is a function of
the length of time (measured in modulator clock cycles)
over which the average is taken; averaging over longer
periods of time results in higher resolution. The Digital
Interface IC can be congured for ve conversion modes,
which have dierent combinations of speed and resolu-
tion to achieve the desired level of performance. Other
functions of the HCPL-0872 Digital Interface IC include
a Phase Locked Loop based pre-trigger circuit that can
either give more precise control of the eective sampling
time or reduce conversion time to less than 1µs, a fast
over-range detection circuit that rapidly indicates when
the magnitude of the input signal is beyond full-scale, an
adjustable threshold detection circuit that indicates when
the magnitude of the input signal is above a user adjust-
able threshold level, an oset calibration circuit, and a
second multiplexed input that allows a second Isolated
Modulator to be used with a single Digital Interface IC.
Applications Information
Digital Current Sensing
As shown in Figure 1, using the Isolated 2-chip A/D
converter to sense current can be as simple as connect-
ing a current-sensing resistor, or shunt, to the input and
reading output data through the 3-wire serial output
interface. By choosing the appropriate shunt resistance,
any range of current can be monitored, from less than 1
A to more than 100 A.
Even better performance can be achieved by fully
utilizing the more advanced features of the Isolated
A/D converter, such as the pre-trigger circuit, which
can reduce conversion time to less than 1µs, the fast
over-range detector for quickly detecting short circuits,
dierent conversion modes giving various resolution/
speed trade-os, oset calibration mode to eliminate
initial oset from measurements, and an adjustable
threshold detector for detecting non-short circuit
overload conditions.
Figure 1. Typical Application Circuit.
R
SHUNT
0.02
INPUT
CURRENT
V
DD1
ISOLATED
+ 5 V
V
IN+
V
IN-
GND1
V
DD2
MCLK
MDAT
GND2
C1
0.1 µF
+
CDAT SCLK
CCLK V
DD
CLAT CHAN
MCLK1 SDAT
MDAT1 CS
MCLK2 THR1
MDAT2 OVR1
GND RESET
NON-ISOLATED
+ 5 V
C3
10 µF
+
HCPL-7860
HCPL-786J
HCPL-7560
3-WIRE
SERIAL
INTERFACE
C2
0.1 µF
HCPL-0872
P1-P3P4-P6P7-P9P10-P12

HCPL-0872

Mfr. #:
Buy HCPL-0872
Manufacturer:
Broadcom / Avago
Description:
Interface - Specialized Digital Interface IC
Lifecycle:
New from this manufacturer.
Delivery:
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