HS7516 datasheet(7/8 Pages) SIPEX

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SIGNAL PROCESSING EXCELLENCE

133

Applications Information

Unipolar Operation

Figure 2 shows the interconnections for unipolar

operation. Connect I

O1 and FB1 as shown in dia-

gram. Tie I

O2 (Pin 7), FB3 (Pin 3), and FB4 (Pin 1)

to Ground (Pin 8). As shown, a series resistor is

recommended in the V

DD supply line to limit

current during ‘turn-on.’ To maintain specified

linearity,externalamplifiersmustbezeroed. Apply

an ALL “ZEROES” digital input and adjust R

for V

OUT = 0 ± 1mV. The SP7516 and HS3160

have been used successfully with OP-07, OP-27

and LF441A. For high speed applications the

SP2525 is recommended.

Bipolar Operation

Figure 3 shows the interconnections for bipolar

operation. Connect I

O1, IO2, FB1, FB3, FB4 as

shown in diagram. Tie LDTR to I

O2. As shown, a

series resistor is recommended in the V

DD supply

line to limit current during ‘turn-on. To maintain

specified linearity, external amplifiers must be

zeroed. This is best done with V

REF set to zero and,

the DAC register loaded with 10...0 (MSB = 1). Set

0S1 for V01 = 0. Set R0S2 for VOUT = 0. Set VREF

to +10V and adjust R

B for VOUT to be 0V.

Grounding

Connect all GND pins to system analog ground

and tie this to digital ground. All unused input

pins must be grounded.

HS7516 Fiches technique(PDF) 7 Page - Sipex Corporation