Agilent Technologies 93000 SOC Series Training Manual page 150

Defining the Levels
DPS Channels
150
Figure 81 Powering a DUT
Each DPS channel delivers voltages up to ±8 V.
Some important features of the DPS channels are as follows:
• Each DPS channel has 2 DACs for voltage setting. Each DAC can be
set to a specific voltage. A trigger signal supplied to a trigger input
of the DPS board (via a pogo pin connecting this input to the DUT
board) switches both DACs (digital Vbump function).
This is a short description of the voltage circuit which allows you to
switch between two different power supply voltages (Vbump) using
an external trigger, such as a digital channel. If Vbump is not used,
the first DAC will be active (the one with lower address bit coding).
• Each DPS channel is supplied with 2 current DACs—one for positive
current limit (clamp) and one for negative current limit.
• Each DPS channel has an ADC for measuring voltage and current.
• Each DPS channel has a sample IDDQ feature. If set to this function,
the channel ADC cannot be triggered for a single shot measurement,
but waits for a trigger signal on a feature input.
• Power-up and hardware reset puts all four channels of a DPS board
in tristate mode.
Disconnect State
When the DUT is "disconnected" the voltage is programmed to zero. If
the off state is set to
to the minimum possible value (close to zero). If the off state is set to
_ (offcurr = act), the clamp current of the off state equals the
ACT CURR
value specified for ilimit.
Agilent 93000 SOC Series User Training Part 1, October 2004
8-2 DPS (Device Power Supply) Pins
_ (offcurr = min), the clamp current is set
MIN CURR