Dual Per-Pin Parametric Measurement Units

The MAX9949/MAX9950 dual parametric measurement units (PMUs) feature a small package size, wide force and measurement range, and high accuracy, making the devices ideal for automatic test equipment (ATE) and other instrumentation that requires a PMU per pin or per site.

The MAX9949/MAX9950 force or measure voltages in the -2V to +7V through -7V to +13V ranges, dependent upon the supply voltage (VCC and VEE). The devices handle supply voltages of up to +30V (VCC to VEE) and a 20V device under test (DUT) voltage swing at full current. The MAX9949/MAX9950 also force or measure currents up to ±25mA with a lowest full-scale range of ±2µA. Integrated support circuitry facilitates use of an external buffer amplifier for current ranges greater than ±25mA.

A voltage proportional to the measured output voltage or current is provided at the MSR output. Integrated comparators, with externally set voltage thresholds, provide detection for both voltage and current levels. The MSR and comparator outputs can be placed in a high-impedance state. Integrated voltage clamps limit the force output to levels set externally. The force-current or the measure-current voltage can be offset -0.2V to +4.4V (IOS). This feature allows for the centering of the control or measured signal within the external DAC or ADC range.

The MAX9949D/MAX9950D feature an integrated 10kΩ force-sense resistor between FORCE and SENSE. The MAX9949F/MAX9950F have no internal force-sense resistor. These devices are available in a 64-pin 10mm x 10mm, 0.5mm pitch TQFP package with an exposed 8mm x 8mm die pad on the top (MAX9949) or the bottom (MAX9950) of the package for efficient heat removal. The exposed paddle is internally connected to VEE. The MAX9949/MAX9950 are specified over the commercial (0°C to +70°C) temperature range.

Applications

* Memory Testers * Structural Testers * System-on-a-Chip Testers * VLSI Testers

* Force Voltage/Measure Current (FVMI)

* Force Current/Measure Voltage (FIMV)

* Force Voltage/Measure Voltage (FVMV)

* Force Current/Measure Current (FIMI)

* Force Nothing/Measure Voltage (FNMV)

* Five Programmable Current Ranges

* ±2µA

* ±20µA

* ±200µA

* ±2mA

* ±25mA

* -2V to +7V Through -7V to +13V Input Voltage Range and Higher (Up to 20V Voltage Swing at Full Current)

* Force-Current/Measure-Current Voltage Offset (IOS)

* Programmable Voltage Clamps for the Force Output

* Low-Leakage, High-Z Measure State

* 3-Wire Serial Interface

* Low Power, 8mA (max) per PMU