HCPL-7560-300 Avago Technologies US Inc., HCPL-7560-300 Datasheet - Page 13

• Manufacturer Part Number: HCPL-7560-300
• Description: OPTOCOUPLER MODULE 8-SMD GW
• Manufacturer: Avago Technologies US Inc.
• Series: -r
• Type: Sigma-Delta Modulatorr

Specifications of HCPL-7560-300

• Voltage - Isolation: 3750Vrms
• Input Type: DC
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SMD Gull Wing
• Lead Free Status / Rohs Status: Contains lead / RoHS non-compliant

Product Description
The HCPL-7560 Isolated Modulator (optocoupler) uses
sigma-delta modulation to convert an analog input
signal into a high-speed (10 MHz) single-bit digital data
stream; the time average of the modulator’s single-bit
data is directly proportional to the input signal. The
isolated modulator’s other main function is to provide
galvanic isolation between the analog input and the
digital output. An internal voltage reference determines
the full-scale analog input range of the modulator (ap-
proximately ± 320 mV); an input range of ± 200 mV is
recommended to achieve optimal performance.
HCPL-7560 can be used together with HCPL-0872,
Digital Interface IC or a digital filter. The primary func-
tions 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 micro-
controller interface. The effective 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
Table 1. Input Full-Scale Range and Code Assignment.
Table 2. Isolated A/D Converter Typical Performance Characteristics.
13
Notes: Bold italic type indicates Default values.
Analog Input
Full Scale Range
Minimum Step Size
+Full Scale
Zero
-Full Scale
Conversion
Mode
1
2
3
4
5
Signal-to-Noise
Ratio (dB)
83
79
73
66
53
Effective
Resolution
(bits)
13.5
12.8
11.9
10.7
8.5
Voltage Input
640 mV
20 µV
+320 mV
0 mV
-320 mV
Conversion Time (µs)
Pre-Trigger Mode
0
205
103
39
20
10
IC can be configured for five conversion modes, which
have different combinations of speed and resolution
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 effective
sampling time or reduce conversion time to less than
1µs, a fast over-range detection circuit that rapidly indi-
cates 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 adjustable threshold level, an offset
calibration circuit, and a second multiplexed input that
allows a second Isolated Modulator to be used with a
single Digital Interface IC.
The digital output format of the Isolated A/D Converter
is 15 bits of unsigned binary data. The input full-scale
range and code assignment is shown in Table 1 below.
Although the output contains 15 bits of data, the effec-
tive resolution is lower and is determined by selected
conversion mode as shown in Table 2 below.
1
102
51
19
10
5
2
0.2
Digital Output
32768 LSBs
1 LSB
111111111111111
100000000000000
000000000000000
Signal
Delay(µs)
102
51
19
10
5
Signal Bandwidth
(kHz)
3.4
6.9
22
45
90