ACPL-7970-500E Avago Technologies US Inc., ACPL-7970-500E Datasheet - Page 18

• Manufacturer Part Number: ACPL-7970-500E
• Description: IsolatedSigmaDelta Mod, TR+IEC+LF
• Manufacturer: Avago Technologies US Inc.
• Series: -r
• Type: Sigma-Delta Modulatorr

Specifications of ACPL-7970-500E

• Operating Supply Voltage: 5.5 V
• Supply Current: 8 mA at 5 V
• Operating Temperature Range: - 40 C to + 105 C
• Mounting Style: SMD/SMT
• Package / Case: DIP-8 Gull Wing
• Input Voltage Range (max): + 200 mV
• Voltage - Isolation: 5000Vrms
• Input Type: DC
• Voltage - Supply: 3 V ~ 5.5 V, 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Lead Free Status / Rohs Status: Details

Voltage Sensing
The ACPL-7970 can also be used to isolate signals with
amplitudes larger than its recommended input range
with the use of a resistive voltage divider at its input. The
only restrictions are that the impedance of the divider be
relatively small (less than 1 k:) so that the input resistance
(24 k:) and input bias current (0.3 PA) do not affect the
accuracy of the measurement. An input bypass capacitor
is still required, although the damping resistor is not
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AV02-2856EN - February 24, 2011
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(the resistance of the voltage divider provides the same
function). The low-pass filter formed by the divider resis-
tance and the input bypass capacitor may limit the achiev-
able bandwidth. To obtain higher bandwidth, the input
bypass capacitor (C2) can be reduced, but it should not be
reduced much below 1000 pF to maintain adequate input
bypassing of the isolated modulator.