LSP2916 Datasheet, PDF (4/10 Pages) Agere Systems – LSP2916 16-Channel, High-Voltage Driver

LSP2916 16-Channel, High-Voltage Driver
Preliminary Data Sheet
July 2001
Pin Information (continued)
Table 2. LSP2916 Pin Description
Pin Name
Function
VLP
GND
VHN
IBIAS
+IN
–INx
OUTPUTx
Power Supply
Ground
VHN < |–298| V
Current Limit Control
Analog Input
Analog Input
Analog Output
Pin Total
Counts
Description
1
5 V analog power supply.
1
Analog ground.
1
High-voltage negative supply.
1
Sets current limit with external resistor to GND.
1
Noninverting input for all channels.
16 Inverting input for each channel.
16 Output.
Absolute Maximum Ratings
Application Notes
Stresses in excess of the absolute maximum ratings
can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the
device is not implied at these or any other conditions in
excess of those given in the operational sections of the
data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Table 3. Absolute Maximum Ratings
Parameter
Power Supply:
VHN
VLP
Operating Temperature
Storage Temperature
Ambient Temperature
Min Typ Max Unit
0 –160.0 –298.0 V
4.5 5.0 5.5 V
–5 25
85 °C
–40 —
85 °C
–5 25
70 °C
Handling Precautions
LSP2916 is recommended for MEMS optical systems.
It features programmable current limit while the output
can swing up to –298 V. With all the feedback resistors
inside the chip, there is no more need for these resis-
tors in the external circuit.
Safety Handling for the High-Voltage Device
LSP2916 is designed to operate up to 298 V negative
power supply, so special care should be paid to safety
issues.
Bypass Capacitors/Protection Series Resistor for
the Power Supplies
To minimize noise coupling to the output, a 0.1 µF
bypass capacitor should be placed as close as
possible to all power supply pins. Additionally, to avoid
the possible degradation of the LSP2916 when VHN is
hot switched, a 10 Ω series resistor between the VHN
pin and the VHN power supply is required.
Although protection circuitry has been designed for this
device, proper precautions should be taken to avoid
exposure to electrostatic discharge (ESD) during
handling and mounting. Agere Systems Inc. employs a
human-body model (HMB) and charged-device model
(CDM) for ESD-susceptibility testing and protection
design evaluation. ESD voltage thresholds are
dependent on the circuit parameters used in the
defined model. No industry-wide standard has been
adopted for CDM. However, a standard HBM
(resistance = 1500 Ω, capacitance = 100 pF) is widely
used, and therefore, can be used for comparison
purposes. The HBM ESD threshold (>500 V) presented
here was obtained by using these circuit parameters.
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Agere Systems Inc.