A d v a n c e d
S c ie n c ea n d
N o v e l
T e c h n o lo g y

A D S A N T E C

27 Via Porto Grande, Rancho Palos Verdes, CA, 90275.

Ph. # 1-310-377-6029.

Fax # 1-310-377-9940.

ASNT5138
40Gbps Dual Limiting Amplifier•

Two parallel broadband limiting amplifiers for receiver side applications.

•Both amplifiers feature automatic input offset control and a peak detector.

•20GHz of analog bandwidth per amplifier channel.

•Adjustable 32-38dB of gain for each amplifier.

•Two CML output interfaces with 50Ω termination and 300mVp-p single-ended swing.

•Single -3.3V power supply.

•Power consumption: 790mW.

•Exhibits low jitter and limited temperature variation over industrial temperature range.

•Fabricated in SiGe for high performance, yield, and reliability.

DESCRIPTION
PD

EF

BUF1

EF

BUF2

EF

BUF3

EF

OBUF

AOC
BIAS
BIAS

PKADJ_1

Gain_c1

PKADJ_2

Gain_c2

PD

EF

BUF1

EF

BUF2

EF

BUF3

EF

OBUF

AOC
1

Functional Block Diagram
Rev.: 1, February 2010.

1

ASNT5138

A D S A N T E C

A d v a n c e dS c ie n c ea n d
N o v e l
T e c h n o lo g y

27 Via Porto Grande, Rancho Palos Verdes, CA, 90275.

Ph. # 1-310-377-6029.

Fax # 1-310-377-9940.

The temperature stable ASNT5138 SiGe IC provides dual channel low jitter broadband variable
signal amplification between its two pair of independent input and output signal ports and isintended for use in high-speed communication systems. ASNT5138 can process two up to40Gbps data signals and deliver two limited 600mVp-p differential signals for input signal
amplitudes as low as 10mVp-p. Automatic offset control (AOC) circuitry is included for bothchannels to separately adjust each amplifier’s unused input signal port when singled ended input
signals are applied. AOC’s low frequency corner is 10KHz with an off chip capacitor value of300nF for both channels. The gain and bandwidth of each amplifier can simultaneously be
adjusted through separate external pins. The part’s two outputs support the CML logic interface
with on chip 50Ω termination and may be used differentially, AC/DC coupled, single-ended, orin any combination. ASNT5138 operates from a single -3.3V power supply.

TERMINAL FUNCTIONSTERMINAL
NAME(NO.)vcc 7,8,10,12,14,16
18,19,27,28,30
32,34,36,38,39
vee
1,5,6,13,20
21,25,26,33,40
inp_1
29
inn_1
31
inp_2
35
inn_2
37
outp_117
outn_115
outp_211
outn_2
9
dca_1
23
dca_2
3
pkdet_1
24
pkdet_2
2
pkadj
4
vgc
22

TYPE

DESCRIPTION

PSPower Supply: 0VPS

Power Supply: -3.3V

Input
Input
Input
Input
OutputOutputOutputOutputOutputOutputOutputOutputInput
Input

High-speed data signal input
Automatic offset control input
High-speed data signal input
Automatic offset control input
Differential CML high-speed data signal outputs
Differential CML high-speed data signal outputs
300nF off chip capacitor connection
300nF off chip capacitor connection
Low speed peak detection output
Low speed peak detection output
Optimum output jitter adjustment
Variable gain control

ELECTRICAL CHARACTERISTICSPARAMETERVEEVCCIEEPowerJunction Temp.
Input (in)Frequency
CM Level
SE Swing
Rev.: 1, February 2010.

MIN-3.1-25

TYP-3.30.0
240
790
50MAX-3.5

1250.040
Vcc-0.8 Vcc-0.3 Vcc+0.3
10200
500
2UNIT
V
V
mA
mW
°C
Gb/s
V
mV

COMMENTS±6%

Peak-to-peak
ASNT5138

A D S A N T E C

A d v a n c e d
S c ie n c ea n d
N o v e l
T e c h n o lo g y

27 Via Porto Grande, Rancho Palos Verdes, CA, 90275.

Output (out)Frequency
CM LevelSE Swing
Rise/Fall Times
Additive Jitter
Tuning Port (vgc)
Input Signal Range
Gain Variation
Bandwidth
Tuning Port (pkadj)
Input Signal Range
Bandwidth
Peak Detect (pkdet)
Output Signal Range
Bandwidth

Rev.: 1, February 2010.

Ph. # 1-310-377-6029.

0.0

40
320
14
2.0

Gb/s
VmV
ps
ps

0.0
38
100

VdB
MHz-1.0
0.0

0.0
100

VMHz-1.0
0.0

0.0
1.0

VKHz

Vcc-0.15
280
300
1012-1.0
32
0.0

353

Fax # 1-310-377-9940.

Peak-to-peak
20%-80%Peak-to-peak< ±5%

ASNT5138