Standard Digital Attenuators
Aeroflex Control Components’ line of switched-bit PIN diode digital attenuators offers
precision, reliability, and repeatability for the most demanding applications. The AT series
digital attenuators are available in convenient binary 4-, 5-, and 6-bit configurations with
0.5dB resolution and up to 63dB total attenuation. The attenuators require only a single
+5V DC power supply and feature TTL-compatible control logic. All switches incorporate
DC blocks at the RF ports. Standard screened devices incorporate epoxy sealed lids and
undergo a stringent yet cost effective screening cycle. The attenuators are also available
with hermetic seal and high-rel screening for mil and space applications.
Applications:
- EW Systems
- Communications Systems
- Automatic Gain Control
- Test Equipment
- Electronic Simulators
- Leveling Circuits
| AT-Series Digital Attenuators (1-2 GHz) |
Part Number
 |
Type |
Total
Attenuation
(dB) |
LSB
(dB) |
MSB
(dB) |
Insertion Loss
(dB max) |
VSWR
(max) |
| ATL4A | 4-BIT | 7.5 | 0.5 | 4 | 2.5 | 1.5 |
| ATL4B | 4-BIT | 15 | 1 | 8 | 2.5 | 1.5 |
| ATL4C | 4-BIT | 30 | 2 | 16 | 2.5 | 1.5 |
| ATL4D | 4-BIT | 60 | 4 | 32 | 2.5 | 1.5 |
| ATL5A | 5-BIT | 15.5 | 0.5 | 8 | 2.8 | 1.5 |
| ATL5B | 5-BIT | 31 | 1 | 16 | 2.8 | 1.5 |
| ATL5C | 5-BIT | 62 | 2 | 32 | 2.8 | 1.5 |
| ATL6A | 6-BIT | 31.5 | 0.5 | 16 | 3.3 | 1.6 |
| ATL6B | 6-BIT | 63 | 1 | 32 | 3.3 | 1.6 |
| AT-Series Digital Attenuators (2-4 GHz) |
| ATS4A | 4-BIT | 7.5 | 0.5 | 4 | 2.9 | 1.6 |
| ATS4B | 4-BIT | 15 | 1 | 8 | 2.9 | 1.6 |
| ATS4C | 4-BIT | 30 | 2 | 16 | 2.9 | 1.6 |
| ATS4D | 4-BIT | 60 | 4 | 32 | 2.9 | 1.6 |
| ATS5A | 5-BIT | 15.5 | 0.5 | 8 | 3.1 | 1.6 |
| ATS5B | 5-BIT | 31 | 1 | 16 | 3.1 | 1.6 |
| ATS5C | 5-BIT | 62 | 2 | 32 | 3.1 | 1.6 |
| ATS6A | 6-BIT | 31.5 | 0.5 | 16 | 3.7 | 1.7 |
| ATS6B | 6-BIT | 63 | 1 | 32 | 3.7 | 1.7 |
| AT-Series Digital Attenuators (4-6 GHz) |
| ATC4A | 4-BIT | 7.5 | 0.5 | 4 | 3.2 | 1.7 |
| ATC4B | 4-BIT | 15 | 1 | 8 | 3.2 | 1.7 |
| ATC4C | 4-BIT | 30 | 2 | 16 | 3.2 | 1.7 |
| ATC4D | 4-BIT | 60 | 4 | 32 | 3.2 | 1.7 |
| ATC5A | 5-BIT | 15.5 | 0.5 | 8 | 3.5 | 1.7 |
| ATC5B | 5-BIT | 31 | 1 | 16 | 3.5 | 1.8 |
| ATC5C | 5-BIT | 62 | 2 | 32 | 3.5 | 1.8 |
| ATC6A | 6-BIT | 31.5 | 0.5 | 16 | 4.0 | 2.0 |
| ATC6B | 6-BIT | 63 | 1 | 32 | 4.0 | 2.0 |
| Control Logic Table |
| Part Number | E1 | E2 | E3 | E4 | E5 | E6 |
| ATL4A / ATS4A / ATC4A | 0.5dB | 1dB | 2dB | 4dB | N/C | N/C |
| ATL4B / ATS4B / ATC4B | 1dB | 2dB | 4dB | 8dB | N/C | N/C |
| ATL4C / ATS4C / ATC4C | 2dB | 4dB | 8dB | 16dB | N/C | N/C |
| ATL4D / ATS4D / ATC4D | 4dB | 8dB | 16dB | 32dB | N/C | N/C |
| ATL5A / ATS5A / ATC5A | 0.5dB | 1dB | 2dB | 4dB | 8dB | N/C |
| ATL5B / ATS5B / ATC5B | 1dB | 2dB | 4dB | 8dB | 16dB | N/C |
| ATL5C / ATS5C / ATC5C | 2dB | 4dB | 8dB | 16dB | 32dB | N/C |
| ATL6A / ATS6A / ATC6A | 0.5dB | 1dB | 2dB | 4dB | 8dB | 16dB |
| ATL6B / ATS6B / ATC6B | 1dB | 2dB | 4dB | 8dB | 16dB | 32dB |
| Additional Electrical Specifications |
| DC Bias: | +5V ±0.5V @ 130mA max
(4-Bit models)
+5V ±0.5V @ 160mA max
(5-Bit models)
+5V ±0.5V @ 190mA max
(6-Bit models) |
| Switching Speed: | 250nsec max (50%TTL-90%RF)
75nsec max (50%TTL-10%RF)
175nsec max (10%RF-90%RF)
25nsec max (90%RF-10%RF) |
| Operating RF Power: | 1W CW max |
Attenuation Accuracy: | +/-0.4dB (0-20dB attenuation)
+/-2% (above 20dB attenuation) |
| Attenuation Flatness: | +/-0.5dB max |
Logic Control: | TTL 0 = Low Loss
TTL 1 = Attenuation |
|
| Mechanical Specifications |
| Case Style | AT Outline |
| Finish | Gold plate per MIL-G-45204 |
| Connectors | SMA Female per MIL-C-39012 |
Bias &
Control Pins | ø0.02” x 0.15” long |
| Weight | 19g max |
| Mounting | ø0.10” through holes (4) places |
|
| Environmental Specifications |
| MIL-E-5400, MIL-STD-202, MIL-E-16400 |
| Operating Temp | -55°C to +85°C |
| Storage Temp | -65°C to +125°C |
| Humidity | MIL-STD-202F, M103, Cond B |
| Shock | MIL-STD-202F, M213, Cond B |
| Altitude | MIL-STD-202F, M105, Cond B |
| Vibration | MIL-STD-202F, M204, Cond B |
| Thermal Shock | MIL-STD-202F, M107, Cond A |
| Temperature Cycle | MIL-STD-202F, M105C, Cond D |
|
| Screening |
| Internal Visual per MIL-STD-883, Method 2017 |
| Temperature Cycle: -65°C to +100°C, 10 cycles |
| Hermetically-sealed attenuators are fine and gross leak checked per
MIL-STD-883, Method 1014 |
| Optional High-Rel screening available upon request. Contact the factory
to discuss your screening requirements |
|
|
Part Number Ordering Information |
Custom Options - Contact Factory |
- ATxxx: Standard version
- ATxxx-RC: RoHS-compliant
- ATxxx-H: Hermetic seal
|
- Gray epoxy paint per MIL-C-22750
- Video transient suppression
- GPO connectors
- ECL logic input
- Phase and amplitude tracking
- Other frequency ranges available from
1MHz to 26GHz
- Reversed logic
- Available without SMA connectors for drop-in applications
- High rel screening
|
