TSH321 WIDE BANDWIDTH AND MOS INPUTS SINGLE OPERATIONAL AMPLIFIER LOW DISTORTION GAIN BANDWIDTH PRODUCT : 300MHz GAIN OF 2 STABILITY SLEW RATE : 400V/µs VERY FAST SETTLING TIME : 60ns (0.1%) VERY HIGH INPUT IMPEDANCE DESCRIPTION: The TSH321 is a wideband monolithic operational amplifier, requiring a minimum close loop gain of 2 for stability. The TSH321 features extremely high input impedance (typically greater than 1012Ω) allowing direct interfacing with high impedance sources. Low distortion, wide bandwidth and high linearity make this amplifier suitable for RF and video applications. Short circuit protection is provided by an internal current-limiting circuit. The TSH321 has internal electrostatic discharge (ESD) protection circuits and fulfills MILSTD883CClass2. N DIP8 (Plastic Package) D SO8 (Plastic Micropackage) ORDER CODES Part Number Temperature Range TSH321I -40 C, 125 C o o Package N D • • 321-01.TBL .. .. .. PIN CONNECTIONS (top view) Offset Null 1 1 8 Inverting Input 2 7 VCC+ Non-inverting Input 3 6 Output 4 5 N.C. 321-01.EPS V CC Offset Null 2 June 1998 1/6 TSH321 SCHEMATIC DIAGRAM 7 V CC + Internal Vref non inverting input 3 6 output Cc 2 inverting input 1 Offset N1 8 Offset N2 321-02.EPS 4 VCC- INPUT OFFSET VOLTAGE NULL CIRCUIT TSH321 N2 N1 321-03.EPS 100kΩ V CC Symbol Value Unit VCC Supply Voltage ±7 V Vid Differential Input Voltage ±5 V Vi Input Voltage Range ±5 V Iin Current On Offset Null Pins ± 20 mA Toper Parameter Operating Free-Air Temperature Range TSH321I -40oC, 125oC o C 321-02.TBL ABSOLUTE MAXIMUM RATINGS OPERATING CONDITIONS 2/6 Parameter VCC Supply Voltage Vic Common Mode Input Voltage Range Value Unit ± 3 to ± 6 V VCC- to VCC+ -3 V 321-03.TBL Symbol TSH321 ELECTRICAL CHARACTERISTICS VCC = ± 5V, Tamb = 25oC (unless otherwise specified) DV io Iib Iio ICC Avd Vicm CMR SVR Vo Parameter Input Offset Voltage Tmin ≤ Tamb ≤ Tmax. Input Offset Voltage Drift Tmin ≤ Tamb ≤ Tmax. Input Bias Current Input Offset Current Supply Current, no load Tmin ≤ Tamb ≤ Tmax. Large Signal Voltage Gain Vo = ±2.5V GBP SR en Kov ts tr, tf td ∅m THD FPB VCC = ± 5V VCC = ± 3V VCC = ±6V VCC = ± 5V See test waveform figure Note 2 : Full power bandwidth = 23 21 25 Max. 10 12 Unit mV µV/oC 300 200 pA pA mA 30 28 40 32 V/V 800 300 200 -5 to +2 60 1300 850 650 -5.5 to +2.5 100 50 ±3 70 +3.5 -3.7 +3.3 -3.5 RL = 50Ω ± 2.8 RL = 100Ω RL = 50Ω ± 2.9 ± 2.7 Output Short Circuit Current Vid = ±1V, Vo = 0V Gain Bandwidth Product AVCL = 100, R L = 100Ω, CL = 15pF, f = 7.5MHz Slew Rate Vin = ± 1V, AVCL = 2 RL = 100Ω, CL = 15pF Equivalent Input Voltage Noise R S = 50Ω fo = 1kHz fo = 10kHz fo = 100kHz fo = 1MHz Overshoot Vin = ± 1V AVCL = 2, RL = 100Ω, CL = 15pF Settling Time 0.1% - (note 1) Vin = ± 1V, AVCL = -1 Rise and Fall Time - (note 1) Vin = ±100mV, AVCL = 2 Delay Time - (note 1) Vin = ±100mV, AVCL = 2 Phase Margin AVM = 2, RL = 100Ω, CL = 15pF Total Harmonic Distortion AVCL = 10, f = 1KHz, Vo = ± 2.5V, no load Full Power Bandwidth - (note 2) Vo = 5Vpp, R L = 100Ω Vo = 2Vpp, R L = 100Ω Note 1 : Typ. 0.5 10 2 2 RL = ∞ RL= 100Ω RL = 50Ω Input Common Mode Voltage Range Common Mode Rejection Ratio Vic = Vicm min. Supply Voltage Rejection Ratio VCC = ± 5V to ± 3V Output Voltage RL = 100Ω Tmin ≤ Tamb ≤ Tmax. Io Min. ± 50 ± 100 V dB dB V mA MHz 300 V/µs 200 400 20 18.2 18.1 18.2 nV √ Hz % 15 ns 60 ns 2 ns 2 Degrees 45 % 0.02 MHz 321-04.TBL Symbol Vio 26 64 SR Π Vopp 3/6 TSH321 TEST WAVEFORM EVALUATION CIRCUIT +5V 10µF 50Ω 10nF ts Input 0.1% of edge amplitude 50Ω Output 90% 50% 1kΩ td 10nF tr 10% Vin 10µF 1kΩ CF PRINTED CIRCUIT LAYOUT As for any high frequency device, a few rules must be observed when designing the PCB to get the best performances from this high speed op amp. From the most to the least important points : • Each power supply lead has to be bypassed to ground with a 10nF ceramic capacitor very close to the device and a 10µF tantalum capacitor. • Use small resistor values to decrease time constant with parasitic capacitance. • Choose component sizes as small as possible (SMD). • On output, decrease capacitor load so as to common return, use a ground plane or common point return for power and signal. avoid circuit stability being degraded which may cause oscillation. One can also add a serial resistor in order to minimise its influence. • All leads must be wide and as short as possi- • One can add in parallel with feedback resistor ble especially for op amp inputs. This is in order to decrease parasitic capacitance and a few pF ceramic capacitor CF adjusted to optimize the settling time. • To provide low inductance and low resistance 4/6 inductance. 321-05.EPS 321-04.EPS -5V TSH321 PM-DIP8.EPS PACKAGE MECHANICAL DATA 8 PINS - PLASTIC DIP A a1 B b b1 D E e e3 e4 F i L Z Min. Millimeters Typ. 3.32 0.51 1.15 0.356 0.204 Max. 1.65 0.55 0.304 10.92 9.75 7.95 Min. 0.020 0.045 0.014 0.008 Max. 0.065 0.022 0.012 0.430 0.384 0.313 2.54 7.62 7.62 3.18 Inches Typ. 0.131 0.100 0.300 0.300 6.6 5.08 3.81 1.52 0.125 0260 0.200 0.150 0.060 DIP8.TBL Dimensions 5/6 TSH321 PM-SO8.EPS PACKAGE MECHANICAL DATA 8 PINS - PLASTIC MICROPACKAGE (SO) A a1 a2 a3 b b1 C c1 D E e e3 F L M S Min. Millimeters Typ. 0.1 0.65 0.35 0.19 0.25 Max. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 Min. Inches Typ. 0.026 0.014 0.007 0.010 Max. 0.069 0.010 0.065 0.033 0.019 0.010 0.020 0.189 0.228 0.197 0.244 0.004 o 45 (typ.) 4.8 5.8 5.0 6.2 1.27 3.81 3.8 0.4 0.050 0.150 4.0 1.27 0.6 0.150 0.016 0.157 0.050 0.024 o 8 (max.) SO8.TBL Dimensions 1998 STMicroelectronics – Printed in Italy – All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 6/6 ORDER CODE : Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publ ication supersedes and replaces all infor mation previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics