ADA4960-1ACPZ-RL Analog Devices Inc, ADA4960-1ACPZ-RL Datasheet - Page 16

• Manufacturer Part Number: ADA4960-1ACPZ-RL
• Description: 5GHz Low Distortion ADC Driver/Line Driv
• Manufacturer: Analog Devices Inc
• Type: ADC Driverr

Specifications of ADA4960-1ACPZ-RL

• Applications: Data Acquisition
• Mounting Type: Surface Mount
• Package / Case: 16-LFCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADA4960-1
ADC INTERFACING
The ADA4960-1 is a high speed amplifier with linearity
performance to drive high speed ADCs up to 1 GHz. Several
options are available to the designer to interface with an ADC.
The ADA4960-1 in Figure 38 is a differential input configuration,
using an input balun to provide the differential input signal. The
25 Ω resistors provide the input source match. The ADA4960-1
outputs can be directly connected to the ADC inputs as long as
the ADC input common mode is within the output common-
mode range of the ADA4960-1. The ADC V
connected to the ADA4960-1 VOCM input pin to align the
ADA4960-1 output voltages with the ADC inputs.
A 100 Ω resistor across the outputs of the ADA4960-1 enhances
system bandwidth and distortion performance when the ADA4960-1
is driving an ADC with high input impedance. Lighter load
resistance improves distortion performance and lowers the
overall bandwidth.
AC
The ADA4960-1 in Figure 39 is a single-ended input configuration.
The input is matched to the source with 50 Ω resistors. The
ADA4960-1 outputs can be directly connected to the ADC inputs
as long as the ADC input common mode is within the output
common-mode range of the ADA4960-1.
AC
50Ω
50Ω
Figure 39. Single-Ended Input Configuration Directly Driving the ADC
Figure 38. Differential Input Configuration Directly Driving the ADC
ETC1-1-13
50Ω
25Ω
25Ω
25Ω
0.1µF
0.1µF
R
0.1µF
0.1µF
R
G
G
VIN
VIP
IIN
IIP
VIP
VIN
IIP
IIN
5V
ADA4960-1
5V
ADA4960-1
VOCM
VON
VOCM
VOP
VOP
VON
100Ω
100Ω
CM
output pin is
V
V
V
V
IN–
IN–
IN+
IN+
ADC
ADC
V
V
CM
CM
Rev. 0 | Page 16 of 20
The signal source can be directly connected to the ADA4960-1
inputs as long as the source dc level is within the common-mode
input range of the ADA4960-1, as shown in Figure 40.
When the ADC input common mode is outside the output
common-mode range of the ADA4960-1, the outputs can be
ac-coupled to provide coupling, as shown in Figure 41.
AC
LINE DRIVER APPLICATIONS
The user accessible gain adjust and bandwidth extension
features allow configuration of the ADA4960-1 for line driver
and channel equalization applications from dc to 6.5 Gbps.
Because of its extremely low distortion performance and high
linearity, the ADA4960-1 can be deployed in cable and backplane
channels to extend channel length and improve signaling
margin for serial links using receive equalization and transmit
pre-emphasis. The ADA4960-1 unidirectional signal path is
protocol and encoding agnostic, supporting myriad signaling
types such as NRZ and PAM2/4/8/N, coded (8b/10b), uncoded,
and out-of-band (SATA-OOB) data.
50Ω
AC
50Ω
V
Figure 40. Single-Ended Input Configuration, DC-Coupled Inputs and
Figure 41. Single-Ended Input Configuration, AC-Coupled to the ADC
REF
50Ω
25Ω
50Ω
25Ω
V
V
REF
REF
0.1µF
0.1µF
R
G
R
G
VIN
VIP
IIN
IIP
VIN
VIP
IIN
IIP
5V
ADA4960-1
Outputs
5V
ADA4960-1
VOCM
VOP
VON
VOP
VON
100Ω
0.1µF
0.1µF
100Ω
V
V
IN–
IN+
V
V
IN–
IN+
ADC
ADC
V
CM