Cirrus Logic CS8130 - Manual (Page 3)

DS134PP2-B 3
RECEIVER CHARACTERISTICS
(T
A
= 25 °C; V+ = 3.0 V, Digital Input Levels: Logic 0 = 0 V,
Logic 1 = V+; unless otherwise specified)
Notes: 5. Typical PIN diode junction capacitance is 70 pF.
6. The temperature coefficient of the receiver threshold setting is low. Current detection thresholds are
above the DC ambient condition. Settings of RS4-0 of less than 00010 are not practical because of
noise. RX threshold settings are roughly linear following the formula:
Threshold (nA) = (RX setting + 1) * 20 + 36.
7. Turn-around time is the time taken for the PIN diode receiver to recover from the IR energy from the
local transmitter. The remote end of the link must wait for this time after receiving data before
transmitting a reply. This time may be reduced to <1 ms by good IR shielding between the transmit LED
to the PIN diode.
TRANSMITTER DRIVER CHARACTERISTICS
(T
A
= 25 °C; V+ = 3.0 V, Digital Input Levels:
Logic 0 = 0 V, Logic 1 = V+, unless otherwise specified)
Notes: 8. Typical LED junction capacitance is 20 pF.
RECOMMENDED OPERATING CONDITIONS
(All voltages with respect to 0 V)
Parameter Symbol Min Typ Max Unit
Input capacitance (Note 5) - 10 - pF
Input noise current - - 11 pA/rtHz
Maximum signal input current from detector - - 2 mA
Maximum DC input current (typically sunlight) - - 100 µA
Input current detection thresholds (Note 6)
(Programmable with a 5 bit value) RS4-0 = 00010
RS4-0 = 00011
RS4-0 = 00101
RS4-0 = 00111
RS4-0 = 11111
-
-
-
-
- 98
114
156
197
724
-
-
-
-
- nA
nA
nA
nA
nA
Bandpass filter response High Pass -3dB
Low Pass -3dB
-
- 200
900 -
- kHz
kHz
Receiver power-up time With high (100 µA) dc ambient
With normal (2 µA) dc ambient
-
- 5
0.3
10
1
ms
ms
Turn-around time, with receiver on continuously (Note 7) - 5 10 ms
Parameter Symbol Min Typ Max Unit
Output Capacitance (Note 8) - 70 - pF
Output rise time (10% to 90%) tr - 20 50 ns
Output fall time (90% to 10%) tf - 20 50 ns
Overshoot over final current - - 25 %
On resistance - 0.8 1.5
Ω
Off Leakage current - - 20 µA
Parameter Symbol Min Typ Max Unit
Operating Ambient Temperature T
A
0 25 70 °C
Data and State Retention Temperature (In Power Down) -40 - 85 °C
CS8130
DS134F1-B 3
CS8130
DS134F1-B1 3