M02097-11 Datasheet, PDF (15/21 Pages) M/A-COM Technology Solutions, Inc. – 3.3/5V LED Driver / Limiting Amplifier for Operation to 500 Mbps

2.0 Pin Definitions
Table 2-1.
QFN Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
M02097 Pad / Pin Descriptions (1 of 2)
Pin Name
Function
RxOUTm
RxOUTp
V_CCR
V_CCT
TC_SLOPE
TC_START
DINp
DINm
FAIL
DIS
MOD_SET
NC
NC
PB_SET
NC
PB_OUT
GNDO
OUTP
OUTN
SV_CC
Limiting amplifier inverting data output (PECL). Output is referenced to the Rx supply input (V_CCR).
Limiting amplifier non-inverting data output (PECL). Output is referenced to the Rx supply input (V_CCR).
Power supply for limiting amplifier circuitry (3.3V or 5V).
Power supply for LED driver circuitry (3.3V or 5V).
Modulation temperature compensation slope. A resistor to ground sets the level of temperature compensation for
the modulation current. Forcing this pin high (to 3.3V) causes the configuration logic to ignore configuration logic
settings until this pin is released to its normal level (~1.25V). Temperature compensation is disabled if this pin is
floating.
A resistor to ground at this pin sets the temperature at which the modulation temperature compensation slope
becomes active. Letting this pin float results in a start temperature of ~-40°C. Grounding this pin disables
temperature compensation.
Transmitter positive Data Input. Internally terminated with 4 kΩ to self-bias voltage of approximately
V_CC3T - 0.65V. Can be AC coupled.
Transmitter negative Data Input. Internally terminated with 4 kΩ to self-bias voltage of approximately
V_CC3T - 0.65V. Can be AC coupled.
Safety circuit fault indicator. Goes high when a safety logic fault is detected. The FAIL output is low when DIS is
high. Open collector; 4.7 kΩ to 10 kΩ external pull-up required. 5V compatible when using a 5V supply.
Disable control (TTL compatible). When high or left floating, the bias and modulation outputs are disabled. Set
low for normal operation. 7 kΩ internal pull-up to V_CCT.
Modulation Current Adjust. Connect a resistor between this pin and ground to set LED modulation current.
No connect, leave floating. Do not connect to ground or V_CC.
No connect, leave floating. Do not connect to ground or V_CC.
A resistor connected from this pin to ground sets the LED pre-bias current. Leave floating if pre-bias is not used.
Not connected in package.
LED pre-bias current output. Connect to LED cathode with a 100 Ω resistor between the LED anode and cathode.
Ground for modulation output stage. Connect directly to ground or can connect to ground through an inductor.
Transmitter positive modulation output. Draws current when DINp is high. Referenced to the SV_CC (transmitter
regulator output) voltage.
Transmitter negative modulation output. Draws current when DINp is low. Referenced to the SV_CC (transmitter
regulator output) voltage.
Internal power supply switch for LED. Provides redundant shutdown during a disable or fault condition.
02097-DSH-001-C
Mindspeed Technologies^®
13
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