MAX3798ETJ+ Maxim Integrated Products, MAX3798ETJ+ Datasheet - Page 25

• Manufacturer Part Number: MAX3798ETJ+
• Description: IC LIMITING AMP/VCSEL DVR 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX3798ETJ+

• Amplifier Type: Limiting
• Number Of Circuits: 1
• Output Type: Differential
• Current - Supply: 97mA
• Voltage - Supply, Single/dual (±): 2.85 V ~ 3.63 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Operating Temperature Range: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output / Channel: -
• -3db Bandwidth: -
• Slew Rate: -
• Gain Bandwidth Product: -
• Current - Input Bias: -
• Voltage - Input Offset: -
• Lead Free Status / Rohs Status: Details

Bit 2: IBIASERR. When the bias incremented result is greater than IBIASMAX, then a SOFT FAULT is reported. (See
the Programming Bias Current section.)
Bit 1: TXED. This only indicates the absence of an AC signal at the transmit input. This is not an LOS indicator.
Bits 7 to 0: SET_IBIAS[8:1]. The bias current DAC is controlled by a total of 9 bits. The SET_IBIAS[8:1] bits are
used to set the bias current with even denominations from 0 to 510 bits. The LSB (SET_IBIAS[0]) bit is controlled by
the BIASINC register and is used to set the odd denominations in the SET_IBIAS[8:0].
Bits 7 to 0: SET_IMOD[8:1]. The modulation current DAC is controlled by a total of 9 bits. The SET_IMOD[8:1] bits
are used to set the modulation current with even denominations from 0 to 510 bits. The LSB (SET_IMOD[0]) bit is
controlled by the MODINC register and is used to set the odd denominations in the SET_IMOD[8:0].
Bits 7 to 0: IMODMAX[7:0]. The IMODMAX register is an 8-bit register that can be used to limit the maximum modu-
lation current. IMODMAX[7:0] is continuously compared to the SET_IMOD[8:1].
Bits 7 to 0: IBIASMAX[7:0]. The IBIASMAX register is an 8-bit register that can be used to limit the maximum bias
current. IBIASMAX[7:0] is continuously compared to the SET_IBAS[8:1].
Bit #
Name
Default Value
Bit #
Name
Default Value
Bit #
Name
Default Value
Bit #
Name
Default Value
Power SFP+ Limiting Amplifier and VCSEL Driver
1.0625Gbps to 10.32Gbps, Integrated, Low-
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[8] (MSB)
[8] (MSB)
[7] (MSB)
[7] (MSB)
______________________________________________________________________________________
7
0
7
0
7
0
7
0
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[7]
[7]
[6]
[6]
6
0
6
0
6
0
6
0
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[6]
[6]
[5]
[5]
5
0
5
0
5
1
5
0
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[5]
[5]
[4]
[4]
4
0
4
1
4
1
4
1
Maximum Modulation Current Setting Register (IMODMAX)
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
Maximum Bias Current Setting Register (IBIASMAX)
[4]
[4]
[3]
[3]
3
0
3
0
3
0
3
0
Modulation Current Setting Register (SET_IMOD)
SET_IBIAS
SET_IMOD
Bias Current Setting Register (SET_IBIAS)
IMODMAX
IBIASMAX
[3]
[3]
[2]
[2]
2
1
2
0
2
0
2
0
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[2]
[2]
[1]
[1]
1
0
1
1
1
0
1
1
SET_IBIAS
SET_IMOD
IMODMAX
IBIASMAX
[0] (LSB)
[0] (LSB)
[1]
[1]
0
0
0
0
0
0
0
0
ADDRESS
ADDRESS
ADDRESS
ADDRESS
H0x0A
H0x0B
H0x08
H0x09
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