KH561AI

www.cadeka.com KH561 Wideband, Low Distortion Driver Amplifier Features s s s s s s General Description The KH561 is a wideband DC coupled, amplifier that combines high output drive and low distortion. At an output of +24dBm (10Vpp into 50Ω), the -3dB bandwidth is 150MHz. As illustrated in the table below, distortion performance remains excellent even when amplifying high-frequency signals to high output power levels. With the output current internally limited to 250mA, the KH561 is fully protected against shorts to ground and can, with the addition of a series limiting resistor at the output, withstand shorts to the ±15V supplies. The KH561 has been designed for maximum flexibility in a wide variety of demanding applications. The two resistors comprising the feedback network set both the gain and the output impedance, without requiring the series backmatch resistor needed by most op amps. This allows driving into a matched load without dropping half the voltage swing through a series matching resistor. External compensation allows user adjustment of the frequency response. The KH561 is specified for both maximally flat frequency response and 0% pulse overshoot compensations. The combination of wide bandwidth, high output power, and low distortion, coupled with gain, output impedance and frequency response flexibility, makes the KH561 ideal for waveform generator applications. Excellent stability driving capacitive loads yields superior performance driving ADC’s, long transmission lines, and SAW devices. A companion part, the KH560, offers superior pulse fidelity for high accuracy DC coupled applications. The KH561 is constructed using thin film resistor/bipolar transistor technology, and is available in the following versions: KH561AI KH561AK -25°C to +85°C -55°C to +125°C 24-pin Ceramic DIP 24-pin Ceramic DIP, features burn-in and hermetic testing 24-pin Ceramic DIP, environmentally screened and electronically tested to MIL-STD-883 150MHz bandwidth at +24dBm output Low distortion (2nd/3rd: -59/-62dBc @ 20MHz and 10dBm) Output short circuit protection User-definable output impedance, gain, and compensation Internal current limiting Direct replacement for CLC561 Applications s s s s s s s Output amplification Arbitrary waveform generation ATE systems Cable/line driving Function generators SAW drivers Flash A/D driving and testing Frequency Response vs. Output Power 16 14 Po = 10dBm Vo = 2Vpp Gain (dB) 12 10 8 6 0 Po = 24dBm Vo = 10Vpp Po = 27.5dBm Vo = 15Vpp Po = 18dBm Vo = 5Vpp 40 80 120 160 200 Frequency (MHz) 5 4 +VCC Compensation Vo V+ 8 + - 19 23 V- 18 5 21 10 15 20 -VCC All undesignated pins are internally unconnected. May be grounded if desired. K Typical Distortion Performance KH561AM 100MHz 2nd 3rd -35 -30 -40 -49 -36 -30 -55°C to +125°C Output Power 10dBm 18dBm 24dBm 20MHz 2nd 3rd -59 -52 -50 -62 -48 -41 50MHz 2nd 3rd -52 -45 -36 -60 -46 -32 REV. 1A January 2004 DATA SHEET KH561 KH561 Electrical Characteristics (Av = +10V, VCC = ±15V, RL = 50Ω, Rf = 410Ω, Rg = 40Ω, Ro = 50Ω; unless specified) NOTES TO THE ELECTRICAL SPECIFICATIONS The electrical characteristics shown here apply to the specific test conditions shown above (see also Figure 1 in description of the operation). The KH561 provides an equivalent, non-zero, output impedance determined by the external resistors. The signal gain to the load is therefore load dependent. The signal gain shown above (Av = +10) is the no load gain. The actual gain to the matching 50Ω load used in these specifications is half of this (+5). The KH561 requires an external compensation capacitor. Unless otherwise noted, this has been set to 10.5pF for the frequency domain specifications (yielding a maximally flat frequency response) and 12.5pF for the time domain specifications (yielding a 0% small signal pulse overshoot response). PARAMETERS Case Temperature Case Temperature CONDITIONS KH561AI KH561AK/AM TYP +25°C +25°C MIN & MAX RATINGS -25°C -55°C +25°C +25°C +85°C +125°C UNITS SYM FREQUENCY DOMAIN RESPONSE (Max. Flat Compensation) ¦ -3dB bandwidth ¦ maximally flat compensation Vo 145