AD7837 Analog Devices, AD7837 Datasheet - Page 12

• Manufacturer Part Number: AD7837
• Description: LC2MOS Complete, Dual 12-Bit MDAC, (8 + 4) Loading Structure
• Manufacturer: Analog Devices

Specifications of AD7837

• Resolution (bits): 12bit
• Dac Update Rate: 250kSPS
• Dac Settling Time: 4µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Byte

AD7837/AD7847
SEATING
1. LEAD NO. 1 IDENTIFIED BY A DOT OR NOTCH.
2. PLASTIC LEADS WILL EITHER BE SOLDER DIPPED OR TIN LEAD PLATED.
PLANE
IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS.
PIN 1
0.016 (0.41)
0.02 (0.5)
24
1
24-Lead Plastic DIP (N-24)
1.228 (31.19)
1.226 (31.14)
0.11 (2.79)
0.09 (2.28)
0.07 (1.78)
0.05 (1.27)
13
12
AD7837–6502/6809 Interface
Figure 25 shows an interface between the AD7837 and the 6502
or 6809 microprocessor. For the 6502 microprocessor, the φ2
clock is used to generate the WR, while for the 6809 the E sig-
nal is used.
0.01 (0.254)
0.006 (0.15)
0.261
(6.61
PIN 1
0.130 (3.30)
0.128 (3.25)
6502/6809
1. LEAD NO. 1 IDENTIFIED BY A DOT.
2. SOIC LEADS WILL EITHER BE TIN PLATED OR SOLDER DIPPED
24
1
0.001
0.03)
IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS.
2 OR E
(1.27)
0.05
R/W
A15
15°
A0
D7
D0
0.32 (8.128)
0°
0.30 (7.62)
0.608 (15.45)
0.596 (15.13)
Dimensions shown in inches and (mm).
0.011 (0.28)
0.009 (0.23)
ADDITIONAL PINS OMITTED FOR CLARITY
OUTLINE DIMENSIONS
0.019 (0.49)
0.014 (0.35)
24-Lead SOIC (R-24)
ADDRESS BUS
SEATING
PLANE
EN
0.096 (2.44)
0.089 (2.26)
ADDRESS
DECODE
13
12
DATA BUS
0.291 (7.39)
0.299 (7.6)
0.225 (5.715)
0.013 (0.32)
0.009 (0.23)
0.125 (3.175)
0.414 (10.52)
0.398 (10.10)
MAX
PIN 1
MIN
1. LEAD NO. 1 IDENTIFIED BY A DOT OR NOTCH.
2. CERDIP LEADS WILL EITHER BE TIN PLATED OR SOLDER DIPPED.
0.021 (0.533)
0.015 (0.381)
IN ACCORDANCE WITH MIL-M-38510 REQUIREMENTS
6
0
TYP
0.03 (0.76)
0.02 (0.51)
24
CS
LDAC
WR
DB7
DB0
1
AD7837
1.290 (32.77) MAX
A0 A1
0.042 (1.067)
0.018 (0.457)
0.110 (2.794)
0.090 (2.286)
24-Lead Cerdip (Q-24)
TYP
0.065 (1.651)
0.055 (1.397)
13
12
0.070 (1.778)
0.020 (0.508)
0.295
(7.493)
MAX
SEATING
PLANE
15°
0.320 (8.128)
0.290 (7.366)
0°
0.012 (0.305)
0.008 (0.203)
TYP
0.180
(4.572)
MAX