X79000 Datasheet, PDF (17/18 Pages) Intersil Corporation – NV DAC with Selectable Output Range and Memory

X79000, X79001, X79002
FIGURE 3. REMOTE SENSING
VH VL
X79000
Variable Gain
& Level Shift
Variable Gain
& Level Shift
DAC
Core
+
Vbuf
–
VFB
Bias
and
Control
Circuit
FIGURE 4. ACHIEVING HIGHER OUTPUT VOLTAGES
VH VL
X79000
Variable Gain
& Level Shift
DAC
Core
+
Variable Gain
& Level Shift
–
*Set Register 3Ch for
V_H = 2.42V
V_L = 0.605V
FIGURE 5. MULTIPLYING DAC CONFIGURATION
Vbuf
Vout = 1.21V to 4.84V*
VFB
10K
10K → or use a Intersil DCP
V_IN
+
–
VH
Variable Gain
& Level Shift
Variable Gain
& Level Shift
DAC
Core
X79000
+
–
VL
Vbuf
VFB
Vout =
[(V_IN - V_L) n/4095] + V_L
n = 0 to 4095
(V_L set to internal reference)
17
FN8147.0
March 17, 2005