IC OPAMP VFB 870MHZ SGL 8MSOP

 

THS4304DGKR

Manufacturer Part NumberTHS4304DGKR
DescriptionIC OPAMP VFB 870MHZ SGL 8MSOP
ManufacturerTexas Instruments
THS4304DGKR datasheets

Availability: By request

International delivery:

Warranty: 60 days

Shipping & payment terms

Added to cart

Select quantity

 

Specifications of THS4304DGKR

Amplifier TypeVoltage FeedbackNumber Of Circuits1
Slew Rate830 V/µsGain Bandwidth Product870MHz
-3db Bandwidth3GHzCurrent - Input Bias7µA
Voltage - Input Offset500µVCurrent - Supply18mA
Current - Output / Channel140mAVoltage - Supply, Single/dual (±)2.7 V ~ 5 V, ±1.35 V ~ 2.5 V
Operating Temperature-40°C ~ 85°CMounting TypeSurface Mount
Package / Case8-MSOP, Micro8™, 8-uMAX, 8-uSOP,For Use With296-18854 - EVAL MODULE FOR THS4304DGK296-18853 - EVAL MODULE FOR THS4304DBV
Lead Free Status / RoHS StatusLead free / RoHS CompliantOutput Type-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Page 21
22
Page 22
23
Page 23
24
Page 24
25
Page 25
26
Page 26
Page 21/26

Download datasheet (870Kb)Embed
PrevNext
www.ti.com
NON-INVERTING SINGLE-SUPPLY OPERATION
The THS4304 EVM can easily be configured for single 5-V supply operation, as shown in the following
schematic, with no change in performance. This circuit passes dc signals at the input, so care must be taken to
reference (or bias) the input signal to mid-supply.
If dc operation is not required, the amplifier can be ac coupled by inserting a capacitor in series with the input
(C7) and output (C9).
V
REF
R3
R6
+V
S
10 kW
10 kW
C8
R8
249 W
0.1 mF
J1
C7
R10
0
0
Figure 54. Non-Inverting 5-V Single-Supply Amplifier
DIFFERENTIAL ADC DRIVE AMPLIFIER
The circuit shown in Figure 54 is adapted as shown in Figure 55 to provide a high-performance differential
amplifier drive circuit for use with high-performance ADCs, like the ADS5500 (14-bit 125-MSP ADC). For testing
purposes, the circuit uses a transformer to convert the signal from a single-ended source to differential. If the
input signal source in your application is differential and biased to mid-rail, no transformer is required.
The circuit employs two amplifiers to provide a differential signal path to the ADS5500. A resistor divider (two
10-k
resistors) is used to obtain a mid-supply reference voltage of 2.5 V (VREF) (the same as shown in the
single-supply circuit of Figure 54). Applying this voltage to the one side of RG and to the positive input of the
operational amplifier (via the center-tap of the transformer) sets the input and output common-mode voltage of
the operational amplifiers to mid-rail to optimize their performance. The ADS5500 requires an input
common-mode voltage of 1.5 V. Due to the mismatch in required common-mode voltage, the signal is ac coupled
from the amplifier output, via the two 1-nF capacitors, to the input of the ADC. The CM voltage of the ADS5500 is
used to bias the ADC input to the required voltage, via the 1-k
drawn by the ADS5500 input stage (at 125 MSPS). This causes a 100-mV shift in the input common-mode
voltage, which does not impact the performance when driving the input to –1 dB of full scale. To offset this effect,
a voltage divider from the power supply can be used to derive the input common-mode voltage reference.
Because the operational amplifiers are configured as non-inverting, the inputs are high impedance. This is
particularly useful when interfacing to a high-impedance source. In this situation, the amplifiers provide
impedance matching and amplification of the signal.
The SFDR performance of the circuit is shown in the following graph (see Figure 56) and provides for full
performance from the ADS5500 to 40 MHz.
−V
GND
S
J3
NC
R7
249 W
GND
TP1
+V
S
U1
4
5
5
4
R2
−
1
1
3
3
+
49.9 W
2
THS4304DBV
2
R1
49.9 W
C5
0
V
REF
resistors. Note: 100-µA common-mode current is
THS4304
SLOS436A – MARCH 2004 – REVISED JULY 2004
GND
+V
S
J4
J6
J5
+V
S
FB2
C2
3.3 mF
J2
C9
0
C4
0.1 mF
21

Related parts for THS4304DGKR

Part Number DescriptionManufacturer Datasheet
THS4304  THS4304 Texas Instruments
  THS4304-SP Texas Instruments
THS4304DGKEVM  THS4304DGKEVM EVAL MODULE FOR THS4304DGK Texas Instruments
  THS4304DBVR IC OPAMP VFB 870MHZ SGL SOT23-5 Texas Instruments
  THS4304DBVRG4 IC OPAMP VFB 870MHZ SGL SOT23-5 Texas Instruments
THS4304DGKRG4  THS4304DGKRG4 IC OPAMP VFB 870MHZ SGL 8MSOP Texas Instruments
  THS4304DR IC OPAMP VFB 870MHZ SGL 8SOIC Texas Instruments
  THS4304DRG4 IC OPAMP VFB 870MHZ SGL 8SOIC Texas Instruments
  THS4304DBVT IC OPAMP VFB 870MHZ SGL SOT23-5 Texas Instruments
  THS4304DBVTG4 IC OPAMP VFB 870MHZ SGL SOT23-5 Texas Instruments
THS4304DGKG4  THS4304DGKG4 IC OPAMP VFB 870MHZ SGL 8MSOP Texas Instruments
  THS4304DG4 IC OPAMP VFB 870MHZ SGL 8SOIC Texas Instruments
THS4304DGK  THS4304DGK IC OPAMP VFB 870MHZ SGL 8MSOP Texas Instruments
  ths4304d Wideband Operational Amplifier Texas Instruments Incorporated
THS4302  THS4302 The THS4302 device is a wideband, fixed-gain amplifier thatoffers high bandwidth, high slew rate, low noise, and low distortion Texas Instruments