View ZL40123_285544.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ZL40123 High Speed, Current Feedback Dual Operational Amplifier
Data Sheet Features
* * * * * * 450 MHz small signal bandwidth 1500V/s slew rate 5.2 mA/channel static supply current 65 mA output current 120 MHz gain flatness to +/- 0.1 dB 8 pin SOIC the ideal choice where a high density of high speed devices is required. The flat gain response to 120 MHz, 450 MHz small signal bandwidth and 1500V/s slew rate make the device an excellent solution for video applications such as driving video signals down significant cable lengths. Other applications which may take advantage of the ZL40123 superior dynamic performance features include low cost high order active filters and twisted pair driver/receivers.
ZL40123/DCA ZL40123/DCB ZL40123DCE1 ZL40123DCF1 Ordering Information 8 Pin SOIC Tubes 8 Pin SOIC Tape & Reel 8 Pin SOIC* Tubes, Bake & Drypack 8 Pin SOIC* Trays, Bake & Drypack *Pb Free Matte Tin -40C to +85C
March 2006
Applications
* * * * Video switchers/routers Video line drivers Twisted pair driver/receiver Active filters
Description
The ZL40123 is a high speed, dual, current feedback operational amplifier offering high performance at a low cost. The device has a very high output current drive capability of 65 mA while requiring only 5.2 mA of static supply current. This feature makes the ZL40123
Out_1
1
8 V+
In_n_1 2
7 Out_2
1
In_p_1 3 6 In_n_2
2
V- 4
ZL40123
5 In_p_2
Figure 1 - Functional Block Diagram and Pin Connection 1
Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2003-2006, Zarlink Semiconductor Inc. All Rights Reserved.
ZL40123
Change Summary
Data Sheet
Changes from January 2005 Issue to March 2006 Issue. Page, section, figure and table numbers refer to this current issue. Page 1 Item Change Updated Ordering Information
Application Notes
Current Feedback Op Amps Current feedback op amps offer several advantages over voltage feedback amplifiers: * * * AC bandwidth not dependent on closed loop gain High Slew Rate Fast settling time
The architecture of the current feedback opamp consists of a high impedance non-inverting input and a low impedance inverting input which is always feedback connected. The error current is amplified by a transimpedance amplifier which can be considered to have gain
Z( f ) =
Zo f 1+ j f o
where Zo is the DC gain. It can be shown that the closed loop non-inverting gain is given by
Vout = Vin
Av fR f 1+ j fZ o o
f o Z o GBOL = Rf Rf
where Av is the DC closed loop gain, Rf is the feedback resistor. The closed loop bandwidth is therefore given by
BWCL =
and for low values of closed loop gain Av depends only on the feedback resistor Rf and not the closed loop gain. Increasing the value of Rf * * * * * Increases closed loop stability Decreases loop gain Decreases bandwidth Reduces gain peaking Reduces overshoot
Using a resistor value of Rf=510 for Av=+2 V/V gives good stability and bandwidth. However since requirements for stability and bandwidth vary it may be worth experimentation to find the optimal Rf for a given application.
2
Zarlink Semiconductor Inc.
ZL40123
Layout Considerations
Data Sheet
Correct high frequency operation requires a considered PCB layout as stray capacitances have a strong influence over high frequency operation for this device. The Zarlink evaluation board serves as a good example layout that should be copied. The following guidelines should be followed: * * * Include 6.8 uF tantalum and 0.1 uF ceramic capacitors on both positive and negative supplies Remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitances Minimize all trace lengths to reduce series inductance
3
Zarlink Semiconductor Inc.
ZL40123
Application Diagrams
Vcc 6.8uF
Data Sheet
Vin
0.1uF Vout 1/2 ZL40123
Rin
Rf
Ra 0.1uF
Vout Rf = Av = 1 + Vin Ra
6.8uF Vee
Figure 2 - Non-inverting Gain
Vcc 6.8uF
* * *
Rb 0.1uF 1/2 ZL40123
*
Vout
Rf Vin
*
Ra
* *
0.1uF
Rin
*
6.8uF Vee
*
Vout Rf = Av = - Vin Ra
Figure 3 - Inverting Gain
4
Zarlink Semiconductor Inc.
ZL40123
Absolute Maximum Ratings
Parameter Symbol Min. Max.
Data Sheet
Units
1 2
Vin Differential Output Short Circuit Protection
VIN VOS/C
1.2 See Apps Note in this data sheet 6.5 VV2 V+ V+ (see Note 3)
V
3 4 5 6
Supply voltage Voltage at Input Pins Voltage at Output Pins EDS Protection (HBM Human Body Model) (see Note 2) Storage Temperature Latch-up test Supply transient test
V+, VV(+IN), V(-IN) VO
V V V kV
7 8 9
-55
+150 (see Note 4) (see Note 5)
C
100 mA for 100 ms
20% pulse for 100ms
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Human body model, 1.5 k in series with 100 pF. Machine model, 20 in series with 100 pF. 0.8 kV between the pairs of +INA, -INA and +INB pins only. 2kV between supply pins, OUTA or OUTB pins and any input pin. 100 mA applied to input and output pins to force the device to go into "latch-up". The device passes this test to JEDEC spec 17. Positive and Negative supply transient testing increases the supplies by 20% for 100 ms.
Note 2: Note 3: Note 4: Note 5:
Operating Range
Characteristic Min. Typ. Max. Units Comments
Supply Voltage (Vcc) Operating Temperature (Ambient) Junction to Ambient resistance
4.0 -40 Rth(j-a) 150
6.0
+85
V C C 4 layer FR4 board C 4 layer FR4 board
Junction to Case resistance
Rth(j-c)
60
5
Zarlink Semiconductor Inc.
ZL40123
Rf=510 , Rload=100 unless specified.
Data Sheet
Electrical Characteristics - Vcc=5 V, Tamb=25C(typ.),Tamb=-40C to +85C(min-max), Av=+2V/V,
Characteristic
Conditions
Typ. 25C
Min./ Ma.x 25C
Min./ Max. -40 to
+85C
Units
Test Type1
Frequency Domain Response
-3 dB Bandwidth
Av=+1; Vo < 0.5Vp-p; Rf=1.5 k Av=+2; Vo < 0.5Vp-p; Rf=510 Av=+2; Vo < 5V p-p; Rf=510
450 380 170 120 0.01 0.015
-
-
MHz MHz MHz MHz % deg.
C C C C C C
+/- 0.1dB Flatness Differential Gain (NTSC) Differential Phase (NTSC)
Time Domain Response
Av=+2; Vo < 0.5Vp-p; Rf=510 Rload=150 Rload=150
Rise and Fall Time
Vout=0.5 V Step Vout=5 V Step
1 2.8 6 4 1500
-
-
ns ns ns % V/s
C C C C C
Settling Time to 0.1% Overshoot Slew Rate
Noise and Distortion
Vout=2 V Step Vout=0.5 V Step Vout=5 V Step
2nd Harmonic Distortion 3nd Harmonic Distortion Equivalent Input Noise Voltage Non-Inverting Current Inverting Current
Static, DC Performance
Vout=2Vp-p, 1 MHz Vout=2Vp-p, 1 MHz
-84 -85
-
-
dBc dBc
C C
>1 MHz >1 MHz >1 MHz
5.5 1.3 11
-
-
nV pV pA
Hz Hz Hz
C C C
Input Offset Voltage Average Drift Input Bias Current - Non-inverting
2.7 2.6
6.3 5.6
7.7 15 6
mV V/deg. C A
A C A
6
Zarlink Semiconductor Inc.
ZL40123
Min./ Ma.x 25C Min./ Max. -40 to
+85C
Data Sheet
Characteristic
Conditions
Typ. 25C
Units
Test Type1
Average Drift Input Bias Current - Inverting Average Drift Power Supply Rejection Ratio (+ve) Power Supply Rejection Ratio (-ve) Common Mode Rejection Ratio Supply Current (per Channel)
Miscellaneous Performance
7.4 DC DC DC Quiescent 61 58 54 5.2
25 58 56 50 6.5
6 28 15 57 55 49 6.7
nA/deg. C uA nA/deg. C dB dB dB mA
C A C A A A A
Input Resistance (Non-inverting) Input Capacitance (Non-inverting) Common Mode Input Range Output Voltage Range Output Current (max) Output Resistance, Closed Loop DC Rload=100
8 1 2.4 2.8 65 90
2.2 2.7 -
2.0 2.6 -
M
C C A A C C
pF V V mA
m
Note: Test Types: (A) 100% tested at 25C. Over temperature limits are set by characterization and simulation. (B) Limits set by characterization or simulation. (C) Typical value only for information.
7
Zarlink Semiconductor Inc.
ZL40123
Rf=510 , unless otherwise specified.
Data Sheet
Typical Performance Characteristics - Tamb=25C, Vsupply= 5 V, Rload=100 , Av=+2V/V,
Non-Inverting Frequency Response
2 0 -2 Normalised Gain (dB) -4 Phase -6 -8 -10 -12 -14 1 10 Frequency (MHz) 100 Vo=0.5Vp-p Av =+4 Rf = 150 Av =+2 Rf = 510 0 -50 -100 -150 -200 1000 Av =+8 Rf = 150 Gain Av =+1 Rf = 1k 200 150 100 50
8
Zarlink Semiconductor Inc.
Phase (deg.)
ZL40123
Data Sheet
Non-Inverting Frequency Response varying Rf
2 Rf=390 0 -2 Normalised Gain (dB) -4 -6 -8 -10 -12 -14 -16 -18 10 100 Frequency (MHz) 1000 Vo=0.5Vp-p Rf=700 Rf=510 Rf=250
Large Signal Gain
0 -2 -4 Gain (dB) -6 -8 -10 -12 -14 -16 10 100 Frequency (MHz) 1000 Vo = 5V p-p Vo = 4V p-p Vo = 1V p-p
9
Zarlink Semiconductor Inc.
ZL40123
Open Loop Transimpedance Gain and Phase
120 110 Transimpedance Gain 100 Transimpedance Phase 90 80 70 60 50 40 1.0E+03 Transimpedance Gain 0
Data Sheet
-30 -60 -90 -120 -150 -180 -210 -240 1.0E+09 Transimpedance Phase
1.0E+04
1.0E+05
1.0E+06 Frequency (Hz)
1.0E+07
1.0E+08
Harmonic Distortion vs Frequency
-40
Vo = 2V p-p
2nd & 3rd Harmonic Distortion (dBc) -50
-60
2nd Harmonic
-70
-80
3rd Harmonic
-90
-100 1 10 Frequency (MHz) 100
10
Zarlink Semiconductor Inc.
ZL40123
Data Sheet
CMRR
70 T = - 40 degC 60 Rejection Ration (dB) 50 40 30 20 10 0 1.0E+03 T = + 25 degC
T = + 85 degC
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
Frequency (Hz)
PSRR +ve
80 T = - 40 degC 70 Rejection Ration (dB) 60 T = + 25 degC 50 40 30 20 10 0 1.0E+03 T = + 85 degC
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
Frequency (Hz)
11
Zarlink Semiconductor Inc.
ZL40123
Data Sheet
PSRR -ve
70 T = - 40 degC 60 Rejection Ration (dB) 50 40 30 20 10 0 1.0E+03 T = + 25 degC T = + 85 degC
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
Frequency (Hz) T
Input Voltage and Current Noise
100 Current Noise (pA/SQRT(Hz) Voltage Noise (nV/SQRT(Hz)
Inverting Input Current Noise 10 Input Voltage Noise
Non-Inverting Input Current 1 1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+06
1.0E+07
Frequency (Hz)
12
Zarlink Semiconductor Inc.
ZL40123
Data Sheet
Supply Current vs Temperature
5.60 5.50 5.40 Supply Current (mA) 5.30 5.20 5.10 5.00 4.90 4.80 4.70 -40 -20 0 20 40 60 80 100 120 140 Die Temp (deg. C)
DC Drift Over Temperature
9.00 8.00 Input Offset Voltage (mV) Input Bias Current (uA) 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 -40 -20 0 20 40 60 80 100 120 140 Die Temp (deg. C) Input Bias Non-Inv Input Offset Voltage Input Bias Inv
13
Zarlink Semiconductor Inc.
ZL40123
Data Sheet
Large and Small Signal Pulse Response
3 0.6
Vout = 5V Step
2 Large Signal Vout (V) 0.4
1
Vout = 0.5V Step
0.2
0
0
-1
-0.2
-2
-0.4
-3 0 10 20 30 40 Time (ns) 50 60 70 80
-0.6
Closed Loop Output Impedance
10 Closed Loop Output Impedance (Ohms)
1
0.1
0.01 0.01
0.1
1 Frequency (MHz)
10
Small Signal Vout (V)
100
14
Zarlink Semiconductor Inc.
ZL40123
Data Sheet
Differential Gain & Phase ZL40122 / ZL40123 NTSC RL=150? 0.07 0.06 0.05 0.04 Differential Gain & Phase (?% & ?) 0.03 0.02 0.01 0 -0.01 -0.02 -0.03 -0.04 -0.05 -0.06 -0.07 -0.7
Best fit Gain Best fit Phase
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Bias Voltage
15
Zarlink Semiconductor Inc.
For more information about all Zarlink products visit our Web Site at
www.zarlink.com
Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved.
TECHNICAL DOCUMENTATION - NOT FOR RESALE

▲Up To Search▲

Price & Availability of ZL40123

	To Download ZL40123 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .