ad9630an Analog Devices, Inc., ad9630an Datasheet - Page 3

• Manufacturer Part Number: ad9630an
• Description: Low Distortion 750 Mhz Closed-loop Buffer Amp
• Manufacturer: Analog Devices, Inc.

ABSOLUTE MAXIMUM RATINGS
Supply Voltages ( V
Continuous Output Current
Temperature Range over Which Specifications Apply
Lead Soldering Temperature (10 sec) . . . . . . . . . . . . . +300 C
Storage Temperature
Junction Temperature
NOTES
1
2
3
Model
AD9630AN
AD9630AR
AD9630AR-REEL –40 C to +85 C 13" Tape and Reel SO-8
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD9630 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
THEORY OF OPERATION
The AD9630 is a wide-bandwidth, closed-loop, unity-gain
buffer that makes use of a new voltage-feedback architecture.
This architecture brings together wide bandwidth and high slew
rate along with exceptional dc linearity. Most previous wide-
bandwidth buffers achieved their bandwidth by utilizing an
open-loop topology which sacrificed both dc linearity and fre-
quency distortion when driven into low load impedances. The
design’s high loop correction factor radically improves dc lin-
earity and distortion characteristics without diminishing
bandwidth. This, in combination with high slew rate, results in
exceptionally low distortion over a wide frequency range.
The AD9630 is an excellent choice to drive high speed and high
resolution analog-to-digital converters. Its output stage is de-
signed to drive high speed flash converters with minimal or no
series resistance. A current booster built into the output driver
helps to maintain low distortion.
REV. B
Absolute maximum ratings are limiting values to be applied individually, and
Output is short-circuit protected to ground, but not to supplies. Prolonged short
Typical thermal impedances (part soldered onto board): Plastic DIP (N):
beyond which the serviceability of the circuit may be impaired. Functional
operability is not necessarily implied. Exposure to absolute maximum rating
conditions for an extended period of time may affect device reliability.
circuit to ground may affect device reliability.
110 C/W;
AD9630AN/AR . . . . . . . . . . . . . . . . . . . . . –40 C to +85 C
AD9630AN/AR . . . . . . . . . . . . . . . . . . . . –65 C to +150 C
AD9630AN/AR . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150 C
JC
= 30 C/W; SOIC (R):
Temperature
Range
–40 C to +85 C 8-Lead Plastic DIP N-8
–40 C to +85 C 8-Lead SOIC
S
ORDERING GUIDE
) . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2
. . . . . . . . . . . . . . . . . . . . . 70 mA
JA
= 155 C/W;
Package
Description
1
JC
= 40 C/W.
Package
Option
SO-8
7 V
JA
=
–3–
Parasitic or load capacitance (>7 pF) connected directly to the
AD9630 output will result in frequency peaking. A small series
resistor (R
tive load will negate this effect. Figure 1 shows the optimal value
of R
sponse. Figure 2 illustrates frequency response for various
capacitive loads utilizing the recommended R
EXPLANATION OF TEST LEVELS
Test Level
I
II 100% Production tested at +25 C and sample tested at
III Sample tested only.
IV Parameter is guaranteed by design and characterization
V Typical value.
VI S Versions are 100% production tested at temperature
S
100% Production tested.
specified temperatures. AC testing of AN and AR grades
done on sample basis only.
testing.
extremes. Other grades are sample tested at extremes.
as a function of C
50
40
30
20
10
0
S
0
+5V
) connected between the buffer output and capaci-
Figure 1. Recommended R
0.1 F
7
(5%, 0.25W)
NO R
WHEN C
FOR C
CAN BE OMITTED
20
24
AD9630 Burn-In Circuit
S
L
NEEDED
> 30pF, "R"
L
NC
NC
< 7pF;
L
NC = NO CONNECT
to obtain the flattest frequency re-
1
2
3
4
40
(Not to Scale)
TOP VIEW
AD9630
C
L
– pF
WARNING!
60
8
7
6
5
200
"R"
NC
NC
(5%, 0.25W)
S
ESD SENSITIVE DEVICE
100
vs. C
S
0.1 F
.
80
R
AD9630
C
S
L
L
–5.2V
100