E4237 Datasheet, PDF (1/39 Pages) Semtech Corporation – Dual Channel Per-Pin Parametric Measurement Unit

TEST AND MEASUREMENT PRODUCTS
Description
E4237/E4257/E4287
Dual Channel Per-Pin
Parametric Measurement Unit
E42X7 is a family of Dual Channel Parametric Measure-
ment Units (PMU) designed for automated test equip-
ment and instrumentation. Manufactured in a wide volt-
age Bi-CMOS process, it is a monolithic solution for a
per-pin PMU.
The E42X7 family consists of three products:
The E42X7 is designed to be a low power, low cost, small
footprint solution to allow high pin count testers to support
a PMU per-pin.
Features
E4287
• 16.25V I/O range
• 4 current ranges up to ± 40 mA
• Analog mux for providing a FLASH^TM
programming level
• Driven guard pin
E4257
• 16.25V I/O range
• 4 Current ranges up to ± 40 mA
• Small 9mm x 9mm footprint
E4237
• 16.25VI/O range
• 2 current ranges up to ± 4 mA
• Low capacitance for use in relayless tester
architectures
Every member of the E42X7 family can drive capacitive
loads of up to 300 pF with no external compensation
components. A user selectable FORCE amplifier
compensation switch allows users to add compensation
components for stability with larger capacitive loads.
Integrated voltage clamp circuitry provides a method for
clamping DUT (Device Under Test) compliance voltage and
protecting the DUT from damage.
Each channel of the E42X7 also features an on-board
window comparator that can be used to determine if a
measurement value is within a user defined range for go/
no-go testing.
Also included with the E42X7 are a number of integrated
switches that allow the connection of a central “system”
PMU to the E42X7 FORCE and SENSE pins and allow the
E42X7 to provide “pull-up” or “pull-down” resistors and
termination voltages for DUTs with open element outputs.
• Four Quadrant Operation (FV/MI, FV/MV, FI/MV, FI/MI)
• 4 Current Ranges (± 40 µA, ± 400 µA, ± 4 mA,
± 40 mA) (E4287, E4257)
• 2 Current Ranges (± 40 µA and ± 4 mA) (E4237)
• Wide Output Voltage Range
– –3.25V to +13V @ RF pin across all ranges
– –3.25V to ± 13V @ FORCE Pin (Ranges A, B, C)
– –1.25V to +11V @ FORCE (Range D)
• Low Power Dissipation
• FV Linearity to ± 0.025% FSVR
• Extremely Fast Settling Times offer reduced test
times/increased tester thru-put.
• Central PMU Switches for External PMU,
–4.75 V to +14.5V, ± 40 mA Ranges
• Switches for Pin Driver Super Voltages
• Driven Guard Output (E4287)
• Test Head Ground Reference
• Stable with up to 300 pF Capacitive Loading with no
external compensation capacitors
• Switchable Compensation allows stability with up to
10 nF Capacitive Loading
• 14x14 mm, 80 Pin MQFP Package (E4287)
• Small, 9x9 mm, 64-Pad LPCC Package (E4237,
E4257)
Applications
• Automated Test Equipment
– Memory Testers
– Logic Testers
– Mixed Signal Testers
– SOC Testers
• Instrumentation
Revision 5 / November 30, 2005
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