AD565A/AD566A
GROUNDING RULES
ABSOLUTE MAXIMUM RATINGS
The AD565A and AD566A bring out separate reference and
power grounds to allow optimum connections for low noise and
high-speed performance. These grounds should be tied together
at one point, usually the device power ground. The separate
ground returns are provided to minimize current flow in
low-level signal paths. In this way, logic return currents are not
summed into the same return path with analog signals.
VCC to Power Ground . . . . . . . . . . . . . . . . . . . . . 0 V to +18 V
VEE to Power Ground (AD565A) . . . . . . . . . . . . 0 V to –18 V
Voltage on DAC Output (Pin 9) . . . . . . . . . . . . –3 V to +12 V
Digital Inputs (Pins 13 to 24) to
Power Ground . . . . . . . . . . . . . . . . . . . . . . –1.0 V to +7.0 V
REF IN to Reference Ground . . . . . . . . . . . . . . . . . . . . 12 V
Bipolar Offset to Reference Ground . . . . . . . . . . . . . . . 12 V
10 V Span R to Reference Ground . . . . . . . . . . . . . . . . 12 V
20 V Span R to Reference Ground . . . . . . . . . . . . . . . . 24 V
REF OUT (AD565A) . . . . . Indefinite Short to Power Ground
Momentary Short to VCC
CONNECTING THE AD565A FOR BUFFERED VOLTAGE
OUTPUT
The standard current-to-voltage conversion connections using
an operational amplifier are shown here with the preferred
trimming techniques. If a low offset operational amplifier
(AD510L, AD517L, AD741L, AD301AL, AD OP07) is used,
excellent performance can be obtained in many situations with-
out trimming (an op amp with less than 0.5 mV max offset
voltage should be used to keep offset errors below 1/2 LSB). If
a 50 Ω fixed resistor is substituted for the 100 Ω trimmer, uni-
polar zero will typically be within 1/2 LSB (plus op amp off-
set), and full-scale accuracy will be within 0.1% (0.25% max).
Substituting a 50 Ω resistor for the 100 Ω bipolar offset trimmer
will give a bipolar zero error typically within 2 LSB (0.05%).
Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 mW
AD565A ORDERING GUIDE
Max Gain
Linearity
T.C. (ppm Temperature
of F.S./؇C) Range
Error Max Package
@ +25؇C
Model1
Options2
AD565AJD 50
AD565AJR 50
AD565AKD 20
AD565ASD 30
AD565ATD 15
0°C to +70°C
0°C to +70°C
0°C to +70°C
–55°C to +125°C
–55°C to +125°C
1/2 LSB
1/2 LSB
1/4 LSB
1/2 LSB
1/4 LSB
Ceramic (D-24)
SOIC (R-28)
Ceramic (D-24)
Ceramic (D-24)
Ceramic (D-24)
NOTES
1For details on grade and package offerings screened in accordance with MIL-
STD-883, refer to the Analog Devices Military Products Databook or current/
883B data sheet.
The AD509 is recommended for buffered voltage-output appli-
cations which require a settling time to 1/2 LSB of one micro-
second. The feedback capacitor is shown with the optimum
value for each application; this capacitor is required to compen-
sate for the 25 picofarad DAC output capacitance.
2D = Ceramic DIP, R = SOIC.
AD566A ORDERING GUIDE
Max Gain
Linearity
T.C. (ppm Temperature
of F.S./؇C) Range
Error Max Package
@ +25؇C
Model1
Option2
AD566AJD 10
AD566AKD
AD566ASD 10
0°C to +70°C
1/2 LSB
1/4 LSB
1/2 LSB
1/4 LSB
Ceramic (D-24)
Ceramic (D-24)
Ceramic (D-24)
Ceramic (D-24)
3
0°C to +70°C
–55°C to +125°C
–55°C to +125°C
AD566ATD
3
NOTES
1For details on grade and package offerings screened in accordance with MIL-
STD-883, refer to the Analog Devices Military Products Databook or current/
883B data sheet.
2D = Ceramic DIP.
–6–
REV. D
ADI [ ADI ]
