C_T = 0.35 pF, R_s@100 mA = 2.5, = 1800 nsec, f_c = 88 kHz
applications: low distortion attenuators

available configurations

part number	package	connection	data sheet	FAXback
HSMP-3810	SOT-23 single		pdf	55332
HSMP-3812	SOT-23 series pair		pdf	55332
HSMP-3813	SOT-23 common anode pair		pdf	55332
HSMP-3814	SOT-23 common cathode pair		pdf	55332
HSMP-4810	SOT-23 low inductance		pdf	55332
HSMP-381B	SOT-323 (SC-70) single		pdf	11716
HSMP-381C	SOT-323 (SC-70) series pair		pdf	11716
HSMP-381E	SOT-323 (SC-70) common anode pair		pdf	11716
HSMP-381F	SOT-323 (SC-70) common cathode pair		pdf	11716
HSMP-481B	SOT-323 low inductance		pdf
HPND-0002	die		pdf	53832
5082-3081	glass		pdf	13657

SPICE model

APLAC Limited PIN Diode Model

APLAC MODEL LIMITATIONS:

The model can be used to predict the r.f. resistance and forward voltage. It does not give predictions of distortion. A PIN diode only behaves reliably as a variable resistor at frequencies above 10fc, where fc = 1/2pt and t is the minority carrier lifetime. The capacitance of a PIN diode does vary with the reverse voltage applied however the APLAC model only allows a fixed value. APLAC uses carrier lifetime (t) as an approximation for transit time (TT).

HSMP-381x Limited APLAC Model

D1 uses the standard SPICE diode model, and is described by Is, N, and TT. Rs in the standard model is replaced by the external network of Rmin, Rmax, and Rvar. The parameters are for a single diode (HSMP-3800). Parameters also apply to the individual diodes within multiple diode configurations.

parameter	units	description	value
Rmax	ohm	maximum r.f. resistance	12000
Rmin	ohm	minimum r.f. resistance	2.5
K	-	resistance curve fitting exponent	0.987
A	-	resistance curve fitting constant	0.0902
L	nH	connection inductance	2
C	pF	diode capacitance at r.f. frequency	0.25
Is	A	diode saturation current	1.2E-9
N	-	diode ideality factor	1.998
TT	nsec	transit time (carrier lifetime)	1500

General Information
As Attenuators
Assembly Information
Reliability Information