NE5410 Philips, NE5410 Datasheet - Page 4

• Manufacturer Part Number: NE5410
• Description: 10-Bit high-speed multiplying D/A converter
• Manufacturer: Philips

Philips Semiconductors Linear Products
approximately 4.0mA. This relationship will remain regardless of the
reference voltage polarity.
Connections for a positive reference voltage are shown in Figure 6a.
For negative reference voltage inputs, or for bipolar reference
voltage inputs in the multiplying mode, R15 can be tied to a negative
voltage corresponding to the minimum input level. For a negative
reference input, R16 should be grounded (Figure 6b). In addition,
the negative voltage reference must be at least 3V above the V
supply voltage for best operation. Bipolar input signals may be
handled by connecting R16 to a positive voltage equal to the peak
positive input level at Pin 15.
When a DC reference voltage is used, capacitive bypass to ground
is recommended. The 5V logic supply is not recommended as a
reference voltage. If a well regulated 5.0V supply, which drives logic,
is to be used as the reference, R16 should be decoupled by
connecting it to the +5.0V logic supply through another resistor and
August 31, 1994
10-Bit high-speed multiplying D/A converter
V
+
–
REF
(16)
(15)
+
–
MSB
(4)
D
1
SEGMENT
DECODER
2R
1
(5)
D
2
R
1
Figure 5. NE5410 Equivalent Circuit
2R
R
(6)
D
R
1
3
EE
2R
R
(7)
D
R
1
4
770
V
EE
2R
D
R
(8)
bypassing the junction of the two resistors with a 0.1 F capacitor to
ground.
The reference amplifier is internally-compensated with a 10pF
feed-forward capacitor, which gives it its high slew rate and fast
settling time. Proper phase margin is maintained with all possible
values of R16 and reference voltages which supply 2.0mA reference
current into Pin 16. The reference current can also be supplied by a
high impedance current source of 2.0mA. As R16 increases, the
bandwidth of the amplifier decreases slightly and settling time
increases. For a current source with a dynamic output impedance of
1.0M , the bandwidth of the reference amplifier is approximately
half what it is in the case of R16=1.0k , and settling time is 10 s.
The reference amplifier phase margin decreases as the current
source value decreases in the case of a current source reference,
so that the minimum reference current supplied from a current
source is 0.5mA for stability.
R
(1)
5
1
2R
D
(9)
R
6
2R
CODE SELECTED 0111110011
(10)
D
R
7
2R
(11)
D
R
8
2R
(12)
D
9
2R
NE/SE5410
LSB
(13)
D
10
Product specification
(INTERNAL)
V
GND
BIAS
(2)
I
(3)
OUT