IC OPAMP CFB 1.7GHZ SGL SOT23-6

 

OPA695IDBVRG4

Manufacturer Part NumberOPA695IDBVRG4
DescriptionIC OPAMP CFB 1.7GHZ SGL SOT23-6
ManufacturerTexas Instruments
OPA695IDBVRG4 datasheets

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Specifications of OPA695IDBVRG4

Amplifier TypeCurrent FeedbackNumber Of Circuits1
Slew Rate4300 V/µs-3db Bandwidth1.7GHz
Current - Input Bias20µAVoltage - Input Offset300µV
Current - Supply12.9mACurrent - Output / Channel120mA
Voltage - Supply, Single/dual (±)5 V ~ 12 V, ±2.5 V ~ 6 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / CaseSOT-23-6
Number Of Channels1Common Mode Rejection Ratio (min)51 dB
Input Offset Voltage3 mVOperating Supply Voltage12 V
Supply Current13.3 mAMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMTMaximum Dual Supply Voltage+/- 6 V
Minimum Operating Temperature- 40 CFor Use WithTSW3070EVM - TSW3070EVM296-19683 - BOARD DEMO FOR SNGL SOT23 OPAMPS
Lead Free Status / RoHS StatusLead free / RoHS CompliantOutput Type-
Gain Bandwidth Product-  
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APPLICATIONS INFORMATION
WIDEBAND CURRENT FEEDBACK OPERATION
The OPA695 gives a new level of performance in wideband
current feedback op amps. Nearly constant AC performance
over a wide gain range, along with 4300V/ s slew rate, gives
a lower power and cost solution for high-intercept IF amplifier
requirements. While optimized at a gain of +8V/V (12dB to a
matched 50
load) to give 450MHz bandwidth, applications
from gains of 1 to 40 can be supported. As a gain of +2
video line driver, the bandwidth extends to 1.4GHz with
a slew rate to support the highest pixel rates. At gains
above 20, the signal bandwidth starts to decrease, but still
exceeds 180MHz up to a gain of 40V/V (26dB to a matched
50
load). Single +5V supply operation is also supported
with similar bandwidths but reduced output power capability.
For lower speed (< 250MHz) requirements with higher output
powers, consider the OPA691.
Figure 1 shows the DC-coupled, gain of +8V/V, dual power
supply circuit used as the basis of the 5V Specifications and
Typical Characteristic curves. For test purposes, the input
impedance is set to 50
with a resistor to ground and the
output impedance is set to 50 with a series output resistor.
Voltage swings reported in the specifications are taken
directly at the input and output pins while load powers (dBm)
are defined at a matched 50
load. For the circuit of Figure
1, the total effective load will be 100
disable control line (DIS) is typically left open to get normal
amplifier operation. The disable line must be asserted low to
shut off the OPA695. One optional component is included in
Figure 1. In addition to the usual power supply decoupling
capacitors to ground, a 0.01 F capacitor is included between
+5V
0.1 F
50 Source
V
I
50
OPA695
Optional
0.01 F
R
F
402
R
G
56.2
0.1 F
–5V
FIGURE 1. DC-Coupled, G = +8V/V, Bipolar Supply Speci-
fications and Test Circuit.
OPA695
SBOS293G
the two power supply pins. In practical PC board layouts, this
optional added capacitor will typically improve the 2nd-
harmonic distortion performance by 3dB to 6dB for bipolar
supply operation.
Figure 2 shows the DC-coupled, gain of –8V/V, dual power
supply circuit used as the basis of the Inverting Typical
Characteristic curves. Inverting operation offers several per-
formance benefits. Since there is no common mode signal
across the input stage, the slew rate for inverting operation
is higher and the distortion performance is slightly improved.
An additional input resistor, R
the input impedance equal to 50 . The parallel combination
of R
and R
T
G
and inverting applications of Figures 1 and 2 will benefit from
optimizing the feedback resistor (R
(see the discussion in Setting Resistor Values to Optimize
Bandwidth ). The typical design sequence is to select the R
value for best bandwidth, set R
the desired input impedance. As the gain increases for the
inverting configuration, a point will be reached where R
equal 50 , where R
by R
only. With R
G
R
is simply increased, to increase gain. This will, however,
F
quickly reduce the achievable bandwidth, as shown by the
inverting gain of –16 frequency response in the Typical
Characteristic curves. For gains > 10V/V (14dB at the matched
|| 458
= 82 . The
load), noninverting operation is recommended to maintain
broader bandwidth.
+
6.8 F
DIS
50 Load
50
V
O
50 Source
V
I
562
6.8 F
+
FIGURE 2. DC-Coupled, G = –8V/V, Bipolar Supply Speci-
www.ti.com
, is included in Figure 2 to set
T
set the input impedance. Both the non-inverting
) value for bandwidth
F
for the gain, then set R
G
is removed and the input match is set
T
fixed to achieve an input match to 50 ,
G
+5V
+V
S
+
0.1 F
6.8 F
20
DIS
50 Load
50
V
O
OPA695
Optional
0.01 F
R
R
F
G
442
54.9
R
T
0.1 F
6.8 F
+
–V
S
–5V
fications and Test Circuit.
F
for
T
will
G
13