E4717DBG SEMTECH [Semtech Corporation], E4717DBG Datasheet - Page 10

• Manufacturer Part Number: E4717DBG
• Description: Quad Channel, Per Pin Precision Measurement Unit
• Manufacturer: SEMTECH [Semtech Corporation]

Transient Clamps
The Edge4717D has on-board transient clamps to limit
the voltage and current spikes that might result from either
changing the current range or changing the operating
mode.
Driven Guard Pin
The Edge4717D features a pin (per channel), GUARD,
which can be used to drive the guard traces of a FORCE/
SENSE pair. By surrounding FORCE and SENSE traces
with guard traces which connect to the GUARD pin, an
effective method to achieve minimal leakage can be
achieved.
TEST AND MEASUREMENT PRODUCTS
Circuit Description (continued)
2005 Semtech Corp. / Rev. 5, 10/14/05
Figure 2. Graphical Representation of
–3.5V
(Note: Slope may be negative)
2 mV
Common Mode Error
V OS@IVMON
–2 mV
CM Error = Slope
9.5V
CM Linearity
V CM@FORCE
10
Power Supply Sequencing
In order to avoid the possibility of latch-up, the following
power-up requirements must be satisified:
The following power supply sequencing can be used as a
guideline when operating the Edge4717D:
1. VEE
2. VEE
Power Up Sequence
1. VCC (substrate)
2. VEE/VDD
3. Digital Inputs
4. Analog Inputs
Power Down Sequence
1. Analog Inputs
2. Digital Inputs
3. VEE/VDD
4. VCC (substrate)
GND
All inputs
VDD
VCC
Edge4717D
VCC at all times
www.semtech.com