MAX3970 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 10Gbps, 3.3V Low-Power Transimpedance Amplifier with RSSI

19-1970; Rev 2; 1/02
10Gbps, 3.3V Low-Power Transimpedance
Amplifier with RSSI
General Description
The MAX3970 is a compact, low-power transimped-
ance amplifier (TIA) optimized for use in 10Gbps opti-
cal receivers. The TIA provides transimpedance at
600V/A with 50Ω differential CML outputs. The
MAX3970 has a typical input-referred noise of 1.1µA,
and when coupled with a high-speed photodiode,
achieves -18dBm sensitivity and +2mA input overload.
A received-signal strength indicator (RSSI) simplifies
optical assembly. The circuit operates from a single
3.3V supply over a junction temperature range from 0°C
to +110°C.
Features
o 150mW Power Dissipation at 3.3V Supply
o 1.1µA_RMS Noise (-18dBm Sensitivity)
o 9GHz Bandwidth
o 2mA_P-P Input Overload
o Received-Signal Strength Indication
o 8ps_P-P Typical Jitter Generation at 1.3mA_P-P Input
Current
o 600V/A Transimpedance
Applications
10.3Gbps Ethernet Optical Receivers
OC-192 VSR Optical Receivers
Fibre-Channel Optical Receivers
Ordering Information
PART
MAX3970U/D
TEMP RANGE
0°C to +85°C
PIN-PACKAGE
Dice
Note: Dice are designed to operate over a 0°C to +110°C junc-
tion temperature (T_J) range, but are tested and guaranteed at
T_A = +25°C.
Typical Application Circuit
3.3V
200pF
V_CC1
FILTER
IN
SUPPLY
FILTERING
MAX3970
R_F
1.0V
V_CC2
0.01µF
OUT+
OUT- _0.01µF
3.3V
LIMITING
AMPLIFIER
RSSI
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.