RHD8540 Datasheet, PDF (1/8 Pages) Aeroflex Circuit Technology – RadHard-by-Design RHD8540 64-Channel Analog Multiplexer 32-Channel Kelvin Measurement Configured

Standard Products
RadHard-by-Design
Datasheet
RHD8540 64-Channel Analog Multiplexer
32-Channel Kelvin Measurement Configured
www.aeroflex.com/RHDseries
April 1, 2015
FEATURES
 64 channels (32 Kelvin measurement channels) provided by six 16-channel multiplexers
 Single power supply operation at +3.3V to +5V
 Radiation performance
- Total dose:
- ELDRS Immune
- SEL Immune:
- Neutron Displacement Damage:
>1Mrad(Si), Dose rate = 50 - 300 rads(Si)/s
>100 MeV-cm²/mg
>10¹⁴ neutrons/cm²
 Full military temperature range
 Low power consumption < 33.6 mW
 CMOS analog switching allows rail to rail operation and low switch impedance
 Two address busses A(0-3) & B(0-3) and four enable lines afford flexible organization
 Designed for aerospace and high reliability space applications
 Packaging – Hermetic ceramic
- 96 leads, 1.320"Sq x 0.200"Ht quad flat pack
- Weight - 15 grams max
 Aeroflex Plainview’s Radiation Hardness Assurance Plan is DLA Certified to MIL-PRF-38534, Appendix G.
GENERAL DESCRIPTION
Aeroflex’s RHD8540 is a radiation hardened, single supply, 64-Channel Multiplexer MCM (multi-chip module). The
RHD8540 design uses specific circuit topology and layout methods to mitigate total ionization dose effects and single
event latchup. These characteristics make the RHD8540 especially suited for the harsh environment encountered in
Deep Space missions. It is available in a 96 lead High Temperature Co-Fired Ceramic (HTCC) Quad Flatpack
(CQFP). It is guaranteed operational from -55°C to +125°C. Available screened in accordance with MIL-PRF-38534
Class K, the RHD8540 is ideal for demanding military and space applications.
ORGANIZATION AND APPLICATION
The RHD8540 consists of four, single supply, 16-Channel Multiplexers arranged as shown in the Block Diagram. The
RHD8540 design is inherently radiation tolerant.
The device will not latch with SEU events to above 100MeV-cm²/mg. Total dose degradation is minimal to above
1Mrad(Si). Displacement damage environments to neutron fluence equivalents in the mid 10¹⁴ neutrons per cm² range
are readily tolerated. There is no sensitivity to low-dose rate (ELDRS) effects. SEU effects are application dependent.
A SECTION
Thirty-two (32) Kelvin measurement channels addressable by bus A₀~A₃, in two 16 channel blocks, each block
enabled separately. Each block connects the addressed channel to two outputs, "Output" and "Current". This technique
enables selecting and reading a remote resistive sensor without the multiplexer resistance being part of the
measurement. For grounded sensors, this is done by passing current to the sensor by means of the "Current" pin and
reading the resultant voltage (proportional to the sensor resistance) at the "Output" pin.
B SECTION
Thirty-two (32) channels addressable by bus B₀~B₃, in two 16 channel blocks, each block enabled separately. Each
block connects the addressed channel to one output. By paralleling the channel inputs and enables, this section can be
converted to act like one of the 16 channel blocks of the A section.
SCD8540 Rev A