AD640B(RevD) 查看數據表（PDF） - Analog Devices
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AD640B Datasheet PDF : 19 Pages
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AD640
(continued from page 1)
6. The low input offset voltage of 50 µV (200 µV max) ensures
good accuracy for low level dc inputs.
7. Thermal recovery “tails,” which can obscure the response
when a small signal immediately follows a high level input,
have been minimized by special attention to design details.
8. The noise spectral density of 2 nV/√Hz results in a noise floor of
~23 µV rms (–80 dBm) at a bandwidth of 100 MHz. The dy-
namic range using cascaded AD640s can be extended to 95 dB
by the inclusion of a simple filter between the two devices.
CHIP DIMENSIONS AND
BONDING DIAGRAM
Dimensions shown in inches and (mm).
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 7.5 V
Input Voltage (Pin 1 or Pin 20 to COM) . . . . –3 V to +300 mV
Attenuator Input Voltage (Pin 5 to Pin 3/4) . . . . . . . . . . . ± 4 V
Storage Temperature Range D, E . . . . . . . . . –65°C to +150°C
Storage Temperature Range N, P . . . . . . . . . –65°C to +125°C
Ambient Temperature Range, Rated Performance
Industrial, AD640B . . . . . . . . . . . . . . . . . . . –40°C to +85°C
Military, AD640T . . . . . . . . . . . . . . . . . . . –55°C to +125°C
Commercial, AD640J . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . . +300°C
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ESD CAUTION
20-Lead Ceramic SBDIP (D) Package
20-Lead Plastic DIP (N) Package
CONNECTION DIAGRAMS
20-Lead PLCC (P) Package
20-Terminal Ceramic LCC (E) Package
SIG –IN 1
20 SIG +IN
ATN LO 2
19 ATN OUT
ATN COM 3
18 CKT COM
ATN COM 4
17 RG1
ATN IN 5 AD640 16 RG0
BL1 6 TOP VIEW 15 RG2
(Not to Scale)
–VS 7
14 LOG OUT
ITC 8
13 LOG COM
BL2 9
SIG –OUT 10
12 +VS
11 SIG +OUT
ATN COM 4
ATN IN 5
BL1 6
–VS 7
ITC 8
3 2 1 20 19
PIN 1
IDENTIFIER
AD640
TOP VIEW
(Not to Scale)
18 CKT COM
17 RG1
16 RG0
15 RG2
14 LOG OUT
9 10 11 12 13
ATN COM 4
ATN IN 5
BL1 6
–VS 7
ITC 8
3 2 1 20 19
AD640
TOP VIEW
(Not to Scale)
9 10 11 12 13
18 CKT COM
17 RG1
16 RG0
15 RG2
14 LOG OUT
–4–
REV. D
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