Dual Per-Pin Parametric Measurement Units

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9

PIN

MAX9950

MAX9949

NAME

FUNCTION

1, 16,

33, 48

1, 16,

33, 48

Negative Analog Supply Input

2, 15,

34, 47

2, 15,

34, 47

Positive Analog Supply Input

3

14

RBCOM

PMU-B Range-Setting-Resistor Common Connection. Connect to one end of all the range-

setting resistors (RB_) for PMU-B. Also serves as the input to an external current-range buffer

for PMU-B.

4

13

RBE

PMU-B Range E Resistor Connection

5

12

RBD

PMU-B Range D Resistor Connection

6

11

RBC

PMU-B Range C Resistor Connection

7

10

RBB

PMU-B Range B Resistor Connection

8

9

RBA

PMU-B Range A Resistor Connection

9

8

FORCEB PMU-B Driver Output. Forces a current or voltage to the DUT for PMU-B.

10

7

SENSEB

PMU-B Sense Input. A Kelvin connection to the DUT. Provides the feedback signal in FVMI

mode and the measured signal in FIMV mode for PMU-B.

11

6

CC1B

PMU-B Compensation Capacitor Connection 1. Provides compensation for the PMU-B main

amplifier.

12

5

CC2B

PMU-B Compensation Capacitor Connection 2. Provides compensation for the PMU-B main

amplifier.

13

4

RXDB

PMU-B Current-Range Sense-Resistor Connection. Connects to the external current-range

sense resistor on the DUT side for PMU-B. See Figure 5.

14

3

RXAB

PMU-B Current-Range Sense-Resistor Connection. Connects to the external current-range

sense resistor on the amplifier side for PMU-B. See Figure 5.

17

64

CS

Chip-Select Input. Force

CS low to enable communication with the serial port.

18

63

LOAD

Serial Port Load Input. A logic low asynchronously loads data from the input registers into the

PMU registers.

19

62

SCLK

Serial Clock Input

20

61

DIN

Serial Data Input. Data loads into DIN MSB first.

21

60

DUTHB

level forces the

DUTHB output low. DUTHB is an open-drain output.

22

59

DUTLB

level forces the

DUTLB output low. DUTLB is an open-drain output.

23

58

EXTBSEL PMU-B External Current-Range Selector. Selects the external current range for PMU-B.

24, 27

54, 57

DGND

Digital Ground

25

56

DOUT

Serial Data Output. Provides data out from the shift register. Facilitates daisy-chaining to DIN

of a downstream PMU. DOUT clocks out data MSB first.

26

55

Logic Supply Voltage Input. The voltage applied at VL sets the upper logic-voltage level.

28

53

EXTASEL PMU-A External Current-Range Selector. Selects the external current range for PMU-A.

29

52

DUTLA

level forces the

DUTLA output low. DUTLA is an open-drain output.

Pin Description