dac16fs Analog Devices, Inc., dac16fs Datasheet - Page 12

• Manufacturer Part Number: dac16fs
• Description: 16-bit High Speed Current-output Dac
• Manufacturer: Analog Devices, Inc.

DAC16
In using high speed op amps, the output capacitance of the
DAC16 appears across the inputs of the op amp where it and the
op amp’s input capacitance will set an additional pole in the op
amp’s loop gain response. The pole is formed with the feedback
resistance and the output resistance of the DAC. This additional
pole may adversely affect the transient response of the circuit
due to the added phase shift. Placing a small capacitor across the
feedback resistance, as shown in Figure 28, compensates for the
additional pole. The value of the capacitor can be determined by
setting R
mum transient response.
0.200 (5.05)
0.125 (3.18)
(5.33)
0.210
MAX
PIN 1
FB
0.022 (0.558)
0.014 (0.356)
C
24
FB
1
= R
1.275 (32.30)
1.125 (28.60)
O
24-Lead Epoxy DIP (P)
0.100
(2.54)
BSC
(C
O
+ C
0.070 (1.77)
0.045 (1.15)
(N-24)
IN
) and should be adjusted for opti-
13
12
0.280 (7.11)
0.240 (6.10)
0.060 (1.52)
0.015 (0.38)
SEATING
PLANE
0.150
(3.81)
MIN
0.325 (8.25)
0.300 (7.62)
0.015 (0.381)
0.008 (0.204)
Dimensions shown in inches and (mm).
OUTLINE DIMENSIONS
0.195 (4.95)
0.115 (2.93)
–12–
The choice of amplifier depends entirely on the required system
accuracy, the required temperature range, and the operating
frequency.
0.0118 (0.30)
0.0040 (0.10)
PIN 1
Figure 28. Compensating for the Feedback Pole
24
1
0.0500
I
(1.27)
BSC
DAC
DAC16
0.6141 (15.60)
0.5985 (15.20)
0.0192 (0.49)
0.0138 (0.35)
R
O
24-Lead Epoxy SOL (S)
C
O
0.1043 (2.65)
0.0926 (2.35)
SEATING
PLANE
(R-24)
13
12
0.2992 (7.60)
0.2914 (7.40)
0.0125 (0.32)
0.0091 (0.23)
0.4193 (10.65)
0.3937 (10.00)
C
R
C
FB
FB
IN
8
0
0.0291 (0.74)
0.0098 (0.25)
V
0.0500 (1.27)
0.0157 (0.40)
OUT
REV. B
45