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0.1 mF

10 mF

0.1 mF

10 mF

VFB

0.1 mF

1 to 10 mF

GND

IOGND

LDAC

CS

16 Bits

D[15:0]

(Other Pins Omitted for Clarity)

D[15:0]

A[23:0]

IOSTRB

R/W

XF(I/O)

TMS320C5402

DAC8544

Address

Decoder

EN

R/W

BIPOLAR OPERATION USING THE DAC8544

VFB

R1 = 10 k

Ω

5 V

− 5 V

R2 = 10 k

Ω

±5 V

DAC8544

0.1

µF

10

µF

5 V

(Other Pins Omitted for Clarity)

OPA703

−

+

V

OUT

+

10

D

65536

* 5V

(3)

DAC8544

SLAS420 – MAY 2004

Figure 33. DAC8544 to TMS320 DSP

The DAC8544 has been designed for single-supply operation but a bipolar output range is also possible using

the circuit shown in Figure 34. The circuit allows the DAC8544 to achieve an analog output range of

±5 V.

Rail-to-rail operation at the amplifier output is achievable using an OPA703 as the output amplifier.

Figure 34. Bipolar Operation With the DAC8544

17