DAC16

REV. B

–12–

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

mum transient response.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

24-Lead Epoxy DIP (P)

(N-24)

24

1

12

13

PIN 1

1.275 (32.30)

1.125 (28.60)

0.280 (7.11)

0.240 (6.10)

0.195 (4.95)

0.115 (2.93)

0.015 (0.381)

0.008 (0.204)

0.325 (8.25)

0.300 (7.62)

SEATING

PLANE

0.060 (1.52)

0.015 (0.38)

0.210

(5.33)

MAX

0.022 (0.558)

0.014 (0.356)

0.200 (5.05)

0.125 (3.18)

0.150

(3.81)

MIN

0.100

(2.54)

BSC

0.070 (1.77)

0.045 (1.15)

24-Lead Epoxy SOL (S)

(R-24)

0.0125 (0.32)

0.0091 (0.23)

8

0

0.0291 (0.74)

0.0098 (0.25)

45

0.0500 (1.27)

0.0157 (0.40)

SEATING

PLANE

0.0118 (0.30)

0.0040 (0.10)

0.0192 (0.49)

0.0138 (0.35)

0.1043 (2.65)

0.0926 (2.35)

0.0500

(1.27)

BSC

24

13

12

1

0.4193 (10.65)

0.3937 (10.00)

0.2992 (7.60)

0.2914 (7.40)

PIN 1

0.6141 (15.60)

0.5985 (15.20)

The choice of amplifier depends entirely on the required system

accuracy, the required temperature range, and the operating

frequency.

DAC16

Figure 28. Compensating for the Feedback Pole