ZHX2022 Datasheet, PDF (12/26 Pages) Zilog, Inc. – FIR TRANSCEIVER

ZHX2022
FIR Transceiver
8
Notes: T_amb=25 °C, V_CC=2.7 V to 5.5 V, unless otherwise noted.
Typical values are for design aid only, not guaranteed nor
subject to production testing.
Table 5. Optoelectronic Characteristics—Receiver
Parameter
Test Conditions
Minimum detection threshold 9.6 kbit/s to 115.2 kbit/s
irradiance, SIR mode
λ=850 nm to 900 nm
Minimum detection threshold 1.152 Mbit/s
irradiance, MIR mode
λ=850 nm to 900 nm
Minimum detection threshold 4.0 Mbit/s
irradiance, FIR mode
λ=850 nm to 900 nm
Maximum detection
threshold irradiance
λ=850 nm to 900 nm
No detection receiver input *
irradiance
Symbol
E_e
E_e
E_e
E_e
E_e
Min
4
(0.4)
Typical Max Unit
25 35 mW/m²
(2.5) (3.5) (µW/cm²)
65
(6.5)
mW/m²
(µW/cm²)
80 90 mW/m²
(8.0) (9.0) (µW/cm²)
5
(500)
kW/m²
(mW/cm²)
mW/m²
(µW/cm²)
Rise time of output signal
Fall time of output signal
Rxd pulse width of output
signal, 50% SIR mode
Rxd pulse width of output
signal, 50% MIR mode
10% to 90%, 15 pF
90% to 10%, 15 pF
input pulse length
1.4 µs < P_Wopt < 25 µs
input pulse length
P_Wopt=217 ns,
1.152 kbit/s
t_{r (Rxd)}
10
40 ns
t_{f (Rxd)}
10
40 ns
t_PW
1.5 1.8 2.1 µs
t_PW
110 250 270 ns
Rxd pulse width of output
signal, 50% FIR mode
input pulse length
P_Wopt=125 ns,
4.0 Mbit/s
t_PW
100
140 ns
input pulse length
P_Wopt=250 ns,
4.0 Mbit/s
t_PW
225
275 ns
Stochastic jitter, leading edge input irradiance=100 mW/m²,
4.0 Mbit/s
20 ns
Note: All timing data measured with 4 Mbit/s are measured using the IrDA^® FIR transmission header.
The data given here are valid 5 µs after starting the preamble.
*This parameter reflects the backlight test of the IrDA physical layer specification to guarantee immunity
against light from fluorescent lamps.
PS021802-1005