
AZ3266
1.25Gbps Transimpedance Amplifier
1630 S. STAPLEY DR., SUITE 125 • MESA, ARIZONA 85204 • USA • (480) 962-5881 • FAX (480) 890-2541
www.azmicrotek.com
ARIZONA MICROTEK, INC.
FEATURES
• 920 MHz Bandwidth
• 1mA Input Overload
• 6.6 pA/Hz
1/2
Noise Density
• Single 3.0V to 3.6V or 4.5V to 5.5V Supply
• Internal DC Restoration Capacitor
• Direct Replacement for MAX3266
DESCRIPTION
The AZ3266 is a transimpedance amplifier for 1.25Gbps fiber optic receivers. The part operates from a single
3.0V to 3.6V or 4.5V to 5.5V supply. Photodiode bias is provided via a 1.5kΩ resistor from V
CC
.
DC restoration is built in, with no external compensation capacitor required. The DC restoration can be disabled
for testing by pulling the FILTER pin to ground potential.
If the part is operated using the V
CC5
supply pin, the VCC pin should be bypassed to ground with a capacitor of at
least 0.1µf.
PACKAGE AVAILABILITY
PACKAGE PART NO. MARKING
8 SOIC AZ3266D AZ3266
8 SOIC T&R AZ3266DR1 AZ3266
8 SOIC T&R AZ3266DR2 AZ3266
DIE AZ3266X N/A
BLOCK DIAGRAM
IN
1.5 K
OUT+
OUT-
V
CC5
V
CC
FILTER
GND
PIN DESCRIPTION
PIN NAME FUNCTION
1 VCC Supply Voltage 3.0 to 3.6V
2 V
CC5
Supply Voltage 4.5 to 5.5V
3 IN Photodiode Input
4 FILTER
Bias Voltage Via 1.5kΩ
Resistor
5 GND Ground
6 OUT- Inverting Output
7 OUT+ Noninverting Output
8 GND Ground
4
3
2
1
V
CC5
8
5
6
7
V
CC
FILTER
IN
GND
OUT-
OUT+
GND
8 SOIC

AZ3266
March 2002 * REV - 3 www.azmicrotek.com
2
Absolute Maximum Ratings are those values beyond which device life may be impaired.
Symbol Character Value Unit
V
CC2
DC Supply Voltage (Referenced to GND) 6.0 V
TA Operating Temperature Range (In Free-Air) -40 to +85
°C
T
STG
Storage Temperature Range -65 to +150
°C
IN Current
±3
mA
FILTER Current
±3
mA
ELECTRICAL CHARACTERISTICS (V
CC
= 3.0V to 3.6V or V
CC5
= 4.5 to 5.5V; 100Ω load between OUT+ and OUT-)
Symbol Characteristic Min Typ Max Unit Condition
Input Bias Voltage 0.70 0.81 0.93 V
ICC Power Supply Current 21 35 mA
Transimpedance 2260 2800 3400
Ω
40µA p-p input
Ro Output Impedance 50
Ω
Per output pin
Maximum Differential Output Voltage 185 250 415 mV p-p 1 mA p-p input
Filter Resistor 1220 1500 1860
Ω
AC Input Overload 1.0 mA p-p
DC Input Overload 0.65 mA
Input Referred Noise Density 6.6 pA/Hz½
Small Signal Bandwidth 750 920 1100 MHz
≤40 uA p-p
Low Frequency Cutoff 44 kHz
-3 dB, input ≤40 uA p-p
Power Supply Rejection Ratio 50 dB Output referred, f < 2 MHz
1355-001
OUT-
OUT+
GND
GND
VCC
VCC 5
IN
FILTER
Die Size: 1260 x 800 µm
Pad Size: 85 x 85 µm

AZ3266
March 2002 * REV - 3 www.azmicrotek.com
3
MILLIMETERS INCHES
DIM
MIN MAX MIN MAX
A
1.75 0.069
A1
0.10 0.25 0.004 0.010
A2
1.25 1.45 0.049 0.057
A3
0.25 0.01
bp
0.36 0.49 0.014 0.019
c
0.19 0.25 0.0075 0.0100
D
4.8 5.0 0.19 0.20
E
3.8 4.0 0.15 0.16
e
1.27 0.050
HE
5.80 6.20 0.228 0.244
L
1.05 0.041
Lp
0.40 1.00 0.016 0.039
Q
0.60 0.70 0.024 0.028
v
0.25 0.01
w
0.25 0.01
y
0.10 0.004
Z
0.30 0.70 0.012 0.028
θ
0
O
8
O
0
O
8
O
OTES:
1. DIMENSIONS D AND E DO NOT
INCLUDE MOLD PROTRUSION.
2. MAXIMUM MOLD PROTRUSION
FOR D IS 0.15mm.
3. MAXIMUM MOLD PROTRUSION
FOR E IS 0.25mm.
PACKAGE DIAGRAM
SOIC 8

AZ3266
March 2002 * REV - 3 www.azmicrotek.com
4
Arizona Microtek, Inc. reserves the right to change circuitry and specifications at any time without prior notice. Arizona Microtek, Inc.
makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Arizona
Microtek, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. Arizona Microtek, Inc. does not convey any license
rights nor the rights of others. Arizona Microtek, Inc. products are not designed, intended or authorized for use as components in systems
intended to support or sustain life, or for any other application in which the failure of the Arizona Microtek, Inc. product could create a
situation where personal injury or death may occur. Should Buyer purchase or use Arizona Microtek, Inc. products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Arizona Microtek, Inc. and its officers, employees, subsidiaries,
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly
or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges tha
Arizona Microtek, Inc. was negligent regarding the design or manufacture of the part.