19-1826; Rev 2; 9/01 KIT ATION EVALU E L B A AVAIL Upstream CATV Amplifiers The MAX3514 is a pin-for-pin compatible upgrade for the MAX3510. Like the MAX3510, the MAX3514 is internally matched for use with a 2:1 (voltage ratio) balun. The MAX3517 utilizes an external output resistor for greater load-matching flexibility, and offers the same performance as the MAX3514. The MAX3516 is a higher power version of the MAX3514 with 3dB more gain and output power capability, and is offered in a smaller thermally enhanced TSSOP-EP package. These devices operate from a single +5VDC supply and draw 120mA during transmit (100% duty cycle, +61dBmV out). The MAX3516 can be operated at up to +9VDC supply for improved harmonic distortion performance. The bias current is automatically adjusted based on the output level to increase efficiency. Additionally, the devices are shut off between bursts to minimize noise and save power while still maintaining a match at the output port. Shutdown mode disables all circuitry and reduces current consumption to 10µA (typ). The MAX3514/MAX3517 are available in a 20-pin QSOP package and the MAX3516 is available in a 20-pin TSSOP-EP package. All devices operate in the extended industrial temperature range (-40°C to +85°C). ________________________Applications DOCSIS/EuroDOCSIS and DVB Cable Modems OpenCable Set-Top Box Telephony over Cable CATV Status Monitor Features ♦ Accurate Gain Control ♦ Gain Programmable in 0.5dB Steps ♦ 56dB of Gain Control Range ♦ -55dBc Harmonic Distortion at 65MHz Input ♦ Low Burst On/Off Transient ♦ High Efficiency: 35mA at +34dBmV Out 8mA Transmit Disable Mode Ordering Information -40°C to +85°C PINPACKAGE 20 QSOP MAX3516EUP -40°C to +85°C 20 TSSOP-EP* MAX3517EEP -40°C to +85°C 20 QSOP PART TEMP RANGE MAX3514EEP *Exposed paddle Pin Configuration TOP VIEW GND 1 20 GND VCC 2 19 VCC GND 3 18 TXEN GND 4 17 N.C. IN+ 5 IN- 6 MAX3514 MAX3516 MAX3517 GND 7 SDA 9 SCLK 10 15 OUT14 CEXT (N.C.) CS 8 Typical Operating Circuit appears at end of data sheet. 16 OUT+ 13 N.C. EXPOSED PADDLE* 12 SHDN 11 GND SPI is a trademark of Motorola Corp. DOCSIS/EuroDOCSIS/OpenCable are trademarks of CableLabs. ( ) FOR MAX3517 ONLY * MAX3516 ONLY QSOP/TSSOP-EP ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX3514/MAX3516/MAX3517 General Description The MAX3514/MAX3516/MAX3517 programmable-gain amplifiers are designed for use in CATV upstream applications. The MAX3514/MAX3517 drive up to +61dBmV (QPSK) into a 75Ω load when driven with a +34dBmV nominal input signal. The MAX3516 drives up to +64dBmV (QPSK). Both input and output ports are differential, requiring that an external balun be used at the output port. The variable gain feature provides greater than 56dB of dynamic range, which is controlled by an SPI™ 3-wire interface. Gain control is available in 0.5dB steps. The devices operate over a frequency range of 5MHz to 65MHz. MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers ABSOLUTE MAXIMUM RATINGS VCC, OUT+, OUT-................................................-0.3V to +10.0V Input Voltage Levels (all inputs) .................-0.3V to (VCC + 0.3V) Continuous Input Voltage (IN+, IN-) ...................................2Vp-p Continuous Current (OUT+, OUT-) ...................................120mA Continuous Power Dissipation (TA = +70°C) 20-Pin QSOP (derate 12.3mW/°C above TA = +70°C). .988mW 20-Pin TSSOP-EP (derate 27mW/°C above TA = +70°C) .......................2200mW Operating Temperature Range .......................... -40°C to +85°C Junction Temperature ..................................................... +150°C Storage Temperature Range ............................ -65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS—MAX3514/MAX3516/MAX3517 (Typical operating circuit; VCC = +4.75V to +5.25V, VGND = 0, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER Supply Voltage SYMBOL CONDITIONS VCC MIN TYP 4.75 D7 = 1, gain code = 125 (AV = 27dB) 120 D7 = 0, gain code = 100 (AV = 0dB) 35 D7 = 1, gain code = 125 (AV = 31dB) 160 D7 = 0, gain code = 94 (AV = 0.5dB) 30 Supply Current Transmit Mode (MAX3514/MAX3517) ICC Supply Current Transmit Mode (MAX3516) ICC Supply Current Transmit Disable Mode ICC TXEN = low 8 Supply Current Low-Power Standby ICC SHDN = low 10 MAX UNITS 5.25 V 150 195 12 mA mA mA µA LOGIC INPUTS Input High Voltage VINH Input Low Voltage VINL Input High Current IBIASH VINH = +3.6V Input Low Current IBIASL VINL = 0 2 2.0 -100 _______________________________________________________________________________________ V 0.8 V 100 µA µA Upstream CATV Amplifiers (MAX3514 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER Voltage Gain, fIN = 5MHz (Note 2) Voltage Gain, fIN = 65MHz SYMBOL AV AV CONDITIONS D7 = 1, gain code = 125, TA = 0°C to +85°C MIN 26.7 TYP 27.7 MAX 28.7 D7 = 1, gain code = 110, TA = 0°C to +85°C 19.2 20.2 21.2 D7 = 1, gain code = 87, TA = 0°C to +85°C 7.7 8.7 9.7 D7 = 0, gain code = 115, TA = 0°C to +85°C 6.7 7.7 8.7 D7 = 0, gain code = 100, TA = 0°C to +85°C -0.8 0.2 1.2 D7 = 0, gain code = 80, TA = 0°C to +85°C -10.8 -9.8 -8.8 D7 = 0, gain code = 60, TA = 0°C to +85°C -20.8 -19.8 -18.8 D7 = 0, gain code = 48, TA = 0°C to +85°C -27.0 -26.0 -25.0 D7 = 1, gain code = 127, TA = -40°C to +85°C; Notes 3, 4 26.3 VOUT = 61dBmV, fIN = 5MHz to 42MHz (Notes 3, 4) -0.3 -0.5 VOUT = 61dBmV, fIN = 5MHz to 65MHz (Notes 3, 4) -1.0 -1.5 fIN = 5MHz to 65MHz, AV = -26dB to +27dB 0.5 dB Gain Step Size fIN = 5MHz to 65MHz, AV = -26dB to +27dB, any 2-bit transition of D0, D1 0.7 1 1.3 fIN = 5MHz to 65MHz, D7 = 0, gain code = 115; to D7 = 1, gain code = 87 0.7 1.0 1.3 Transmit-Disable Mode Noise TXEN = low, BW = 160kHz, fIN = 5MHz to 65MHz; Note 3 Isolation in Transmit-Disable Mode TXEN = low, fIN = 5MHz to 65MHz (Note 3) Transmit Mode Noise BW = 160kHz, fIN = 5MHz to 65MHz, AV = -26dB to +27dB; Note 3 Transmit Enable Transient Duration Transmit Disable Transient Duration Transmit Disable/Transmit Enable Transient Step Size Output Return Loss dB dB Gain Rolloff Input Impedance UNITS ZIN -71 60 dB dBmV dB -59 dBc TXEN input rise/fall time < 0.1µs, TA = +25°C (Note 3) 2 µs TXEN input rise/fall time < 0.1µs, TA = +25°C (Note 3) 2 µs D7 = 1, gain code = 125 (AV = 27dB), TA = +25°C 30 D7 = 0, gain code = 100 (AV = 0.2dB), TA = +25°C 1 fIN = 5MHz to 65MHz, single ended; Note 3 fIN = 5MHz to 42MHz in 75Ω system, D7 = 1 gain code = 125 (AV = 27dB) (Note 4) 100 mVp-p 1 1.5 kΩ 10 dB _______________________________________________________________________________________ 3 MAX3514/MAX3516/MAX3517 AC ELECTRICAL CHARACTERISTICS—MAX3514 MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers AC ELECTRICAL CHARACTERISTICS—MAX3514 (continued) (MAX3514 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER SYMBOL Output Return Loss in TransmitDisable Mode Two-Tone Third-Order Distortion IM3 2nd-Harmonic Distortion HD2 3rd-Harmonic Distortion HD3 AM to AM AM to PM 4 AM/AM AM/PM CONDITIONS MIN TYP MAX fIN = 5MHz to 42MHz, in 75Ω system, TXEN = low; Note 4 10 Input tones at 42MHz and 42.2MHz, both +31dBmV, VOUT = +58dBmV/tone; Note 3 -53 Input tones at 65MHz and 65.2MHz, both +31dBmV, VOUT = +58dBmV/tone -49 fIN = 33MHz, VOUT = +61dBmV; Note 3 -55 -53 fIN = 65MHz, VOUT = +61dBmV; Note 3 -55 -52 fIN = 22MHz, VOUT = +61dBmV -55 -50.5 fIN = 65MHz, VOUT = +61dBmV -55 -50.5 AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz 0.1 AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 0.1 AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz 1 AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 1 UNITS dB -47 dBc dBc dBc dB degrees _______________________________________________________________________________________ Upstream CATV Amplifiers (MAX3516 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER Voltage Gain, fIN = 5MHz (Note 2) Voltage Gain, fIN = 65MHz Gain Rolloff Gain Step Size SYMBOL AV AV CONDITIONS MIN TYP MAX D7 = 1, gain code = 125, TA = 0°C to +85°C 30 31 32 D7 = 1, gain code = 119, TA = 0°C to +85°C 27 28 29 D7 = 1, gain code = 104, TA = 0°C to +85°C 19.5 20.5 21.5 D7 = 1, gain code = 81, TA = 0°C to +85°C 8 9 10 D7 = 0, gain code = 109, TA = 0°C to +85°C 7 8 9 D7 = 0, gain code = 94, TA = 0°C to +85°C -0.5 0.5 1.5 D7 = 0, gain code = 74, TA = 0°C to +85°C -10.5 -9.5 -8.5 D7 = 0, gain code = 54, TA = 0°C to +85°C -20.5 -19.5 -18.5 D7 = 0, gain code = 42, TA = 0°C to +85°C -26.5 -25.5 -24.5 D7 = 1, gain code = 127, TA = -40°C to +85°C (Notes 3, 4) 28.1 -0.3 -0.6 VOUT = 64dBmV, fIN = 5MHz to 65MHz (Notes 3, 4) -1.1 -1.7 fIN = 5MHz to 65MHz, AV = -26dB to +30dB 0.5 dB fIN = 5MHz to 65MHz, AV = -26dB to +30dB, any 2-bit transition of D0, D1 0.7 fIN = 5MHz to 42MHz, AV = -26dB to +30dB, D7 = 0, gain code = 109; to D7 = 1, gain code = 81 0.7 TXEN = low, BW = 160kHz, fIN = 5MHz to 65MHz Isolation in Transmit-Disable Mode TXEN = low, fIN = 5MHz to 65MHz (Note 3) Transmit Mode Noise BW = 160kHz, fIN = 5MHz to 65MHz, AV = -26dB to 27dB (Note 3) dB dB VOUT = 64dBmV, fIN = 5MHz to 42MHz (Notes 3, 4) Transmit-Disable Mode Noise UNITS 1.0 1.3 dB 1.0 1.3 -71 60 dBmV dB -59 dBc _______________________________________________________________________________________ 5 MAX3514/MAX3516/MAX3517 AC ELECTRICAL CHARACTERISTICS—MAX3516 MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers AC ELECTRICAL CHARACTERISTICS—MAX3516 (continued) (MAX3516 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) MAX UNITS Transmit Enable Transient Duration PARAMETER SYMBOL TXEN input rise/fall time < 0.1µs, TA = +25°C (Note 3) 2 µs Transmit Disable Transient Duration TXEN input rise/fall time < 0.1µs, TA = +25°C (Note 3) 2 µs Transmit Disable/Transmit Enable Transient Step Size Input Impedance ZIN CONDITIONS MIN TYP D7 = 1, gain code = 119, (AV = 28dB), TA = +25°C 30 D7 = 0, gain code = 94, (AV = 0.5 dB), TA = +25°C 1 fIN = 5MHz to 65MHz, single-ended (Note 3) 100 mVp-p 1 1.5 kΩ Output Return Loss fIN = 5MHz to 65MHz in 75Ω system D7 = 1, gain code = 125, (AV = 31dB) (Note 4) 10 dB Output Return Loss in TransmitDisable Mode fIN = 5MHz to 65MHz in 75Ω system, TXEN = low (Note 4) 10 dB Input tones at 42MHz and 42.2MHz, both +31dBmV, VOUT = +58dBmV/tone -53.5 Input tones at 65MHz and 65.2MHz, both +31dBmV, VOUT = +58dBmV/tone -48.8 Two-Tone Third-Order Distortion (Note 3) 2nd-Harmonic Distortion (Note 3) 3rd-Harmonic Distortion IM3 HD2 HD3 dBc fIN = 33MHz, VOUT = +61dBmV -55 fIN = 33MHz, VOUT = +64dBmV -55 -53 fIN = 65MHz, VOUT = +61dBmV -55 -52 fIN = 22MHz, VOUT = +61dBmV -55 -50.5 fIN = 22MHz, VOUT = +64dBmV -50 fIN = 65MHz, VOUT = +61dBmV -55 0.1 dB dBc dBc -50.5 AM to AM AM/AM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz AM to AM AM/AM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 0.1 dB AM to PM AM/PM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz 1 degrees AM to PM AM/PM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 1 degrees 6 _______________________________________________________________________________________ Upstream CATV Amplifiers (MAX3517 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER Voltage Gain, fIN = 5MHz SYMBOL AV CONDITIONS MIN TYP MAX D7 = 1, gain code = 125, TA = 0°C to +85°C 26.7 27.7 28.7 D7 = 1, gain code = 110, TA = 0°C to +85°C 19.2 20.2 21.2 D7 = 1, gain code = 90, TA = 0°C to +85°C 9.2 10.2 11.2 D7 = 1, gain code = 70, TA = 0°C to +85°C -0.8 0.2 1.2 D7 = 1, gain code = 115, TA = 0°C to +85°C 6.7 7.7 8.7 D7 = 1, gain code = 100, TA = 0°C to +85°C -0.8 0.2 1.2 D7 = 1, gain code = 80, TA = 0°C to +85°C -10.8 -9.8 -8.8 D7 = 0, gain code = 60, TA = 0°C to +85°C -20.8 -19.8 -18.8 D7 = 0, gain code = 48, TA = 0°C to +85°C -27.0 -26.0 -25.0 UNITS dB Gain Step Size fIN = 5MHz to 65MHz, AV = -26dB to +27dB 0.5 dB Transmit-Disable Mode Noise TXEN = low, BW = 160kHz, fIN = 5MHz to 65MHz -71 dBmV Isolation in Transmit-Disable Mode TXEN = low, fIN = 5MHz to 65MHz 58 dB Transmit Mode Noise BW = 160kHz, fIN = 5MHz to 65MHz, AV = -26dB to +27dB; Note 3 Transmit Enable Transient Duration TXEN input rise/fall time < 0.1µs, TA = +25°C; Note 3 50 -60 -59 dBc 2 µs _______________________________________________________________________________________ 7 MAX3514/MAX3516/MAX3517 AC ELECTRICAL CHARACTERISTICS—MAX3517 MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers AC ELECTRICAL CHARACTERISTICS—MAX3517 (continued) (MAX3517 EV kit; VCC = +4.75V to +5.25V, VGND = 0, PIN = +34dBmV, TXEN = SHDN = high, TA = -40°C to +85°C. Typical parameters are at VCC = +5V, TA = +25°C, unless otherwise specified.) (Note 1) PARAMETER SYMBOL Transmit Disable Transient Duration MIN TYP TXEN input rise/fall time < 0.1µs, TA = +25°C Transmit Disable/Transmit Enable Transient Step Size Input Impedance CONDITIONS ZIN D7 = 1, gain code = 125, (AV = 27dB), TA = +25°C 30 D7 = 0, gain code = 100, (AV = 0.2 dB), TA = +25°C 1 fIN = 5MHz to 65MHz, single ended; Note 3 MAX UNITS 2 µs 100 mVp-p 1 1.5 kΩ Output Return Loss fIN = 5MHz to 65MHz in 75Ω system D7 = 1, gain code = 125, (AV = 27dB); Note 4 8.3 dB Output Return Loss in TransmitDisable Mode fIN = 42MHz, in 75Ω system TXEN = low; Note 4 10.5 dB Input tones at 42MHz and 42.2MHz, both +31dBmV, VOUT = +58dBmV/tone -49.5 Input tones at 65MHz and 65.2MHz, both +31dBmV, VOUT = +58dBmV/tone -46.3 Two-Tone Third-Order Distortion (Note 2) IM3 2nd-Harmonic Distortion HD2 3rd-Harmonic Distortion HD3 dBc fIN = 33MHz, VOUT = +61dBmV -55 fIN = 65MHz, VOUT = +61dBmV -55 fIN = 22MHz, VOUT = +61dBmV -55 fIN = 65MHz, VOUT = +61dBmV -55 dBc dBc AM to AM AM/AM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz 0.1 dB AM to AM AM/AM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 0.1 dB AM to PM AM/PM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 42MHz 1 degrees AM to PM AM/PM AV = 27dB, VIN = +34dBmV to +38dBmV, fIN = 65MHz 1 degrees 8 _______________________________________________________________________________________ Upstream CATV Amplifiers (VCC = 4.75V to 5.25V, VGND = 0, TXEN = SHDN = high, D7 = X, TA = +25°C, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SEN to SCLK Setup Time tSENS 20 ns SEN to SCLK Hold Time tSENH 10 ns SDA to SCLK Setup Time tSDAS 10 ns SDA to SCLK Hold Time tSDAH 20 ns SDA Pulse Width High TDATAH 50 ns SDA Pulse Width Low TDATAL 50 ns SCLK Pulse Width High tSCLKH 50 ns SCLK Pulse Width Low tSCLKL 50 ns Note 1: Note 2: Note 3: Note 4: Guaranteed by design and characterization to ±3 sigma for TA < +25°C, unless otherwise specified. AC Gain correlated to DC Gain measurements to ±3 sigma. Guaranteed by design and characterization to ±6 sigma. Does not include output matching; see Output Match in the Applications section. __________________________________________Typical Operating Characteristics (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) MAX3514/MAX3517 TRANSMIT-ENABLE MODE LOW-NOISE, GAIN CODE = 100 40 20 29.2 100 80 60 HIGH-POWER MODE 40 0 LOW-NOISE MODE -25 0 25 50 TEMPERATURE (°C) 75 100 TA = -40°C T = +25°C A 28.8 28.6 TA = +85°C 28.2 0 -50 29.0 28.4 20 TRANSMIT-DISABLE MODE GAIN CODE = 127 29.4 VOLTAGE GAIN (dB) 80 60 120 SUPPLY CURRENT (mA) TRANSMIT-ENABLE MODE HIGH-POWER, GAIN CODE = 125 100 29.6 MAX3514 toc02 120 SUPPLY CURRENT (mA) 140 MAX3514 toc01 140 VOLTAGE GAIN vs. SUPPLY VOLTAGE HIGH-POWER MODE SUPPLY CURRENT vs. GAIN CODE MAX3514 toc03 SUPPLY CURRENT vs. TEMPERATURE 28.0 0 20 40 60 80 GAIN CODE 100 120 140 4.6 4.8 5.0 5.2 5.4 SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 9 MAX3514/MAX3516/MAX3517 TIMING CHARACTERISTICS _____________________________Typical Operating Characteristics (continued) (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) MAX3514/MAX3517 (continued) -26.0 -26.2 TA = +25°C -26.6 TA = +85°C -26.8 -27.0 4.8 5.0 5.2 28.7 28.6 VCC = +5.00V 28.5 D GAIN CODE: A = 125 B = 100 C = 87 D = 60 60 1 A C D -20 E -30 F -40 -50 GAIN CODE: A = 120, B = 115, C = 95, D = 75, E = 55, F = 35 -60 -70 10 100 1 1000 10 100 FREQUENCY (MHz) FREQUENCY (MHz) GAIN STEP vs. GAIN CODE HIGH-POWER MODE GAIN STEP vs. GAIN CODE LOW-NOISE MODE 1.0 MAX3514 toc10 1.0 0.9 0.8 0.9 0.8 GAIN STEP (dB) 0.6 0.5 0.4 0.4 0.2 0.2 0.1 0.1 60 70 80 90 100 GAIN CODE 110 120 85 HIGH-POWER MODE LOW- NOISE MODE 30 40 50 60 70 80 90 100 110 120 -20 -25 HIGH-POWER MODE -30 -35 -40 -45 LOW-NOISE MODE -50 0 0 60 TRANSMIT NOISE vs. GAIN CODE 0.5 0.3 35 GAIN CODE 0.6 0.3 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 1000 0.7 0.7 10 VOLTAGE GAIN vs. GAIN CODE B -10 -15 TEMPERATURE (°C) MAX3514 toc08 20 0 -40 85 MAX3514 toc11 -30 35 VOLTAGE GAIN (dB) 0 -20 10 10 VOLTAGE GAIN (dB) C -10 -15 30 MAX3514 toc07 B VCC = +5.25V -10.4 -11.0 -40 VOLTAGE GAIN vs. FREQUENCY LOW-NOISE MODE 10 -10.2 -10.8 VOLTAGE GAIN vs. FREQUENCY HIGH-POWER MODE 20 VCC = +4.75V -10.0 -10.6 TEMPERATURE (°C) A VCC = +5.00V -9.8 28.3 SUPPLY VOLTAGE (V) 30 -9.6 28.4 5.4 40 VOLTAGE GAIN (dB) 28.8 28.2 4.6 10 VCC = +5.25V OUTPUT NOISE (dBmV IN 160kHz) -26.4 28.9 -9.4 MAX3514 toc09 -25.8 VCC = +4.75V MAX3514 toc12 -25.6 29.0 GAIN CODE = 80 -9.2 VOLTAGE GAIN (dB) TA = -40°C VOLTAGE GAIN (dB) VOLTAGE GAIN (dB) -25.4 GAIN CODE = 127 29.1 -9.0 MAX3514 toc05 GAIN CODE = 48 -25.2 29.2 MAX3514 toc04 -25.0 VOLTAGE GAIN vs. TEMPERATURE LOW-NOISE MODE VOLTAGE GAIN vs. TEMPERATURE HIGH-POWER MODE MAX3514 toc06 VOLTAGE GAIN vs. SUPPLY VOLTAGE LOW-NOISE MODE GAIN STEP (dB) MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers -55 30 40 50 60 70 80 GAIN CODE 90 100 110 120 30 50 70 90 GAIN CODE ______________________________________________________________________________________ 110 130 Upstream CATV Amplifiers (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) MAX3514/MAX3517 (continued) 20dBmV, LN 50dBmV, HP -65 61dBmV, HP -70 -75 -80 -60 50dBmV, HP -65 20dBmV, LN -70 6dBmV, LN 20 HIGH-POWER MODE 1 LOW-NOISE MODE 0.1 140 ______________________________________________________________________________________ 11 40 50 60 70 0 10 INPUT FREQUENCY (MHz) 20 30 40 50 60 0 20 120 30 70 40 INPUT FREQUENCY (MHz) OUTPUT RETURN LOSS vs. FREQUENCY (75Ω SYSTEM) OUTPUT IMPEDANCE (75Ω SYSTEM) -2 -4 80 100 OUTPUT SPECTRUM 0 MAX3514 toc17 MAX3514 toc16 0 60 GAIN CODE -10 -20 MAX3514 toc18 10 10 -75 -80 0 VOUT = 61dBmV α = 0.25 1280ksps -30 HIGH-POWER MODE -40 LOW NOISE MODE/ TRANSMIT DISABLE MODE -8 (dB) -6 -50 -60 -10 -70 -12 -80 LOW-NOISE MODE/ TRANSMIT DISABLE -14 HIGH-POWER MODE -90 -100 -16 10 500kHz/div 100 FREQUENCY (MHz) OUTPUT SPECTRUM -10 -20 OUTPUT SPECTRUM 0 VOUT = 61dBmV α = 0.25 160ksps -20 -30 -40 -40 (dB) -30 -50 -50 -60 -60 -70 -70 -80 -80 -90 -90 -100 -100 100kHz/div VOUT = 61dBmV α = 0.25 1280ksps -10 MAX3514 toc20 0 MAX3514 toc19 1 (dB) OUTPUT RETURN LOSS (dB) TRANSIENT LEVEL (mVp-p) -60 61dBmV, HP -55 100 MAX3514 toc14 6dBmV, LN -50 3RD HARMONIC DISTORTION (dBc) MAX3514 toc13 2ND HARMONIC DISTORTION (dBc) -50 -55 POWER-UP/DOWN TRANSIENTS vs. GAIN CODE 3RD HARMONIC DISTORTION vs. INPUT FREQUENCY MAX3514 toc15 2ND HARMONIC DISTORTION vs. INPUT FREQUENCY 5.5MHz/div MAX3514/MAX3516/MAX3517 Typical Operating Characteristics (continued) Typical Operating Characteristics (continued) (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) MAX3516 TRANSMIT-ENABLE MODE, LOW-NOISE, GAIN CODE = 100 60 90 HIGH-POWER MODE 60 LOW-POWER MODE TRANSMIT-DISABLE MODE -50 -25 0 25 50 75 20 40 60 80 100 120 -25.5 TA = +25°C -26.0 4.6 VCC = 4.75V 31.2 MAX3514 toc25 VCC = 5.25V 31.0 30.8 VCC = 5.00V 30.6 -5.8 VCC = 5.25V -6.2 -6.4 30.2 -6.8 VCC = 5.00V -7.0 -40 -15 10 35 60 85 -40 10 D 0 E 0 C -10 D -20 E F -30 -10 GAIN CODE: A = 125, B = 119, C = 100, D = 80, E = 60 -20 -30 1 10 GAIN CODE: A = 120, B = 109, C = 90, D = 70, E = 50, F =30 -40 -50 100 FREQUENCY (MHz) 1000 VOLTAGE GAIN (dB) C 1 10 100 FREQUENCY (MHz) 35 60 85 1000 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 MAX3514 toc29 B VOLTAGE GAIN (dB) 20 A 10 10 VOLTAGE GAIN vs. GAIN MODE MAX3514 toc28 B 12 20 -15 TEMPERATURE (°C) VOLTAGE GAIN vs. FREQUENCY LOW-NOISE MODE MAX3514 toc27 A 30 MAX3514 toc23 VCC = 4.75V -6.0 -6.6 VOLTAGE GAIN vs. FREQUENCY HIGH-POWER MODE 40 5.4 -5.6 TEMPERATURE (°C) 27 0 5.2 -5.4 30.4 TA = +85°C 5.0 GAIN CODE = 80 -5.2 30.0 -26.5 4.8 -5.0 VOLTAGE GAIN (dB) VOLTAGE GAIN (dB) -25.0 31.4 140 VOLTAGE GAIN vs. TEMPERATURE LOW-NOISE MODE 31.6 VOLTAGE GAIN (dB) TA = -40°C -24.5 TA = +85°C VOLTAGE GAIN vs. TEMPERATURE HIGH-POWER MODE GAIN CODE = 125 31.8 MAX3514 toc24 GAIN CODE = 42 30.6 SUPPLY VOLTAGE (V) 32.0 -24.0 30.8 GAIN CODE TEMPERATURE (°C) VOLTAGE GAIN vs. SUPPLY VOLTAGE LOW-NOISE MODE 31.0 30.0 0 100 TA = +25°C 31.2 30.2 0 0 TA = -40°C 31.4 30.4 30 30 31.6 MAX3514 toc26 90 120 GAIN CODE = 125 31.8 VOLTAGE GAIN (dB) 120 32.0 MAX3514 toc22 TRANSMIT-ENABLE MODE, HIGH-POWER, GAIN CODE = 125 150 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 150 180 MAX3514 toc21 180 VOLTAGE GAIN vs. SUPPLY VOLTAGE HIGH-POWER MODE SUPPLY CURRENT vs. GAIN CODE SUPPLY CURRENT vs. TEMPERATURE VOLTAGE GAIN (dB) MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers HIGH-POWER MODE LOW-NOISE MODE 30 40 50 60 70 80 90 100 110 120 GAIN CODE ______________________________________________________________________________________ Upstream CATV Amplifiers MAX3516 (continued) GAIN STEP vs. GAIN CODE LOW-NOISE MODE 0.9 0.8 0.7 GAIN STEP (dB) 0.7 0.6 0.5 0.4 0.5 0.4 0.3 0.3 0.2 0.2 0.1 0.1 0 70 80 90 100 110 120 -25 HIGH-POWER MODE -30 -35 -40 -45 LOW-NOISE MODE -50 0 -55 30 40 50 60 70 80 90 100 110 120 30 50 70 90 110 GAIN CODE GAIN CODE GAIN CODE 2ND HARMONIC DISTORTION vs. INPUT FREQUENCY, VCC = 5.0V 3RD HARMONIC DISTORTION vs. INPUT FREQUENCY, VCC = 5.0V 2ND HARMONIC DISTORTION vs. INPUT FREQUENCY, VCC = 7.0V 50dBmV, HP -60 -65 61dBmV, HP -70 -75 -80 64dBmV, HP -50 61dBmV, HP -55 50dBmV, HP -60 20dBmV, LN -65 -70 -75 -50 20dBmV, LN -55 130 MAX3514 toc35 -55 -45 2ND HARMONIC DISTORTION (dBc) 20dBmV, LN MAX3514 toc34 MAX3514 toc33 -50 3RD HARMONIC DISTORTION (dBc) 60 2ND HARMONIC DISTORTION (dBc) 0.6 -20 MAX3514 toc32 0.8 TRANSMIT NOISE vs. GAIN CODE MAX3514 toc31 0.9 GAIN STEP (dB) 1.0 MAX3514 toc30 1.0 OUTPUT NOISE (dBmV IN 160kHz) GAIN STEP vs. GAIN MODE HIGH-POWER MODE 50dBmV, HP -60 -65 61dBmV, HP -70 64dBmV, HP -75 64dBmV, HP -80 10 20 30 40 50 60 -80 0 10 20 30 40 50 60 INPUT FREQUENCY (MHz) INPUT FREQUENCY (MHz) 3RD HARMONIC DISTORTION vs. INPUT FREQUENCY, VCC = 7.0V POWER-UP/DOWN TRANSIENTS vs. GAIN CODE 61dBmV, HP -60 50dBmV, HP 20dBmV, LN -65 -70 0 10 10 HIGH-POWER MODE 1 0.1 0 10 20 30 40 50 INPUT FREQUENCY (MHz) 60 70 40 50 60 0 70 -4 -6 HIGH-POWER MODE -8 -10 -12 LOW-NOISE MODE/ TRANSMIT-DISABLE MODE -14 -80 30 -2 LOW-NOISE MODE -75 20 OUTPUT RETURN LOSS vs. FREQUENCY (75Ω SYSTEM) OUTPUT RETURN LOSS (dB) -55 TRANSIENT LEVEL (mVp-p) 64dBmV, HP 70 INPUT FREQUENCY (MHz) 100 MAX3514 toc36 -50 3RD HARMONIC DISTORTION (dBc) 70 MAX3514 toc37 0 MAX3514 toc38 -85 -16 0 20 40 60 80 GAIN CODE 100 120 140 1 10 100 FREQUENCY (MHz) ______________________________________________________________________________________ 13 MAX3514/MAX3516/MAX3517 Typical Operating Characteristics (continued) (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (Typical operating circuit; VCC = +5V, VIN = +34dBmV, TXEN = SHDN = high, fIN = 20MHz, ZLOAD = 75Ω, TA = +25°C, unless otherwise noted.) MAX3516 (continued) OUTPUT IMPEDANCE, 5MHz–65MHz (75Ω SYSTEM) OUTPUT SPECTRUM -10 -20 MAX3514 toc40 MAX3514 toc39 0 VOUT = 61dBmV α = 0.25 1280ksps -30 LOW-NOISE MODE/TRANSMITDISABLE MODE (dB) -40 -50 -60 -70 -80 HIGH-POWER MODE -90 -100 500kHz/div -20 MAX3514 toc41 -10 VOUT = 61dBmV α = 0.25 160ksps -20 -40 (dB) -30 -40 -50 VOUT = 61dBmV α = 0.25 1280ksps -10 -30 -50 -60 -60 -70 -70 -80 -80 -90 -90 -100 -100 100kHz/div 14 OUTPUT SPECTRUM 0 MAX3514 toc42 OUTPUT SPECTRUM 0 (dB) MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers 5.5MHz/div ______________________________________________________________________________________ Upstream CATV Amplifiers PIN NAME 1, 3, 7, 11 GND Ground FUNCTION 2 VCC Programmable-Gain Amplifier (PGA) +5V Supply. Bypass to pin 4 with a decoupling capacitor as close to the part as possible. 4 GND PGA RF Ground. As with all ground connections, maintain the shortest possible (low-inductance) length to the ground plane. 5 IN+ Positive PGA Input. Along with IN-, this port forms a high-impedance differential input to the PGA. Driving this port differentially increases the rejection of second-order distortion at low output levels. 6 IN- Negative PGA Input. When not used, this port must be AC-coupled to ground. See IN+. 8 CS Serial-Interface Enable. TTL-compatible input. See Serial Interface section. 9 SDA Serial-Interface Data. TTL-compatible input. See Serial Interface section. 10 SCLK Serial-Interface Clock. TTL-compatible input. See Serial Interface section. 12 SHDN Shutdown. When SHDN is set low, all functions (including the serial interface) are disabled. 13, 17 N.C. No Connection 14 CEXT RF Output Bypass. Bypass to ground with a 0.1µF capacitor. (N.C. for MAX3517.) 15 OUT- Negative Output. Along with OUT+, this port forms a 300Ω impedance output. This port is matched to a 75Ω load using a 2:1 (voltage ratio) transformer. 16 OUT+ Positive Output. See OUT-. 18 TXEN Transmit Enable. Drive TXEN high to place the device in transmit-enable mode. 19 VCC Output Amplifier Bias, +5V Supply. Bypass to pin 20 with a decoupling capacitor as close to the part as possible. 20 GND Output Amplifier Bias Ground. As with all ground connections, maintain the shortest possible (lowinductance) length to the ground plane. Exposed Paddle GND Ground (MAX3516 only) ______________________________________________________________________________________ 15 MAX3514/MAX3516/MAX3517 Pin Description Upstream CATV Amplifiers MAX3514/MAX3516/MAX3517 Functional Diagram TXEN SHDN VCC BIAS CONTROL MAX3514 MAX3516 MAX3517 HIGH POWER OUTCEXT IN+ OUT+ IN- * LOW NOISE D/A CONVERTER SERIAL DATA INTERFACE CS SDA SCLK Detailed Description Programmable-Gain Amplifier The PGA consists of the variable-gain amplifier (VGA) and the digital-to-analog converter (DAC), which provide better than 56dB of output level control in 0.5dB steps. The PGA is implemented as a programmable Gilbert-cell attenuator. The gain of the PGA is determined by a 7-bit word (D6–D0) programmed through the serial data interface (Tables 1 and 2). Specified performance is achieved when the input is driven differentially. The device may be driven single ended. To drive the device in this manner, one of the input pins must be capacitively coupled to ground. Use a capacitor value large enough to allow for a lowimpedance path to ground at the lowest frequency of operation. For operation down to 5MHz, a 0.001µF capacitor is suggested. Output Amplifiers The output amplifiers are Class A differential amplifiers capable of driving +61dBmV (QPSK, MAX3514) differentially. This architecture provides superior even-order distortion performance but requires that a transformer be used to convert to a single-ended output. In transmit-disable mode, the output amplifiers are powered 16 GND *MAX3514/MAX3516 ONLY down. A resistor is across the output so that the output impedance remains matched when the amplifier is in transmit-disable mode. Disabling the output devices also results in low output noise. MAX3514/MAX3516 To match the output impedance to a 75Ω load, the transformer must have a turns ratio (voltage ratio) of 2:1 (4:1 impedance ratio). The differential amplifier is biased directly from the +5V supply using the center tap of the output transformer. This provides a significant benefit when switching between transmit mode and transmit-disable mode. Stored energy due to bias currents will cancel within the transformer and prevent switching transients from reaching the load. MAX3517 The MAX3517 uses external matching resistors to allow matching to various load impedances through suitable values of matching resistors and transformer turns ratios. Serial Interface The serial interface has an active-low enable (CS) to bracket the data, with data clocked in MSB first on the rising edge of SCLK. Data is stored in the storage latch on the rising edge of CS. The serial interface controls ______________________________________________________________________________________ Upstream CATV Amplifiers Applications Information High-Power and Low-Noise Modes The MAX3514/MAX3516/MAX3517 have two transmit modes, high power (HP) and low noise (LN). Each of these modes is actuated by the high-order bit D7 of the 8-bit programming word. When D7 is a logic 1, HP mode is enabled. When D7 is a logic 0, LN mode is enabled. Each of these modes is characterized by the activation of a distinct output stage. In HP mode, the output stage exhibits 15dB higher gain than LN mode. The lower gain of the LN output stage allows for significantly lower output noise and lower transmit/transmit-disable transients. The full range of gain codes (D6–D0) may be used in either mode. For DOCSIS applications, HP mode is recommended for output levels at or above +42dBmV (MAX3514, D7 = 1, gain code = 87), LN mode when the output level is below +42dBmV (MAX3514, D7 = 0, gain code = 115). Shutdown Mode In normal operation, the shutdown pin (SHDN) is held high. When SHDN is taken low, all circuits within the IC are disabled. Only leakage currents flow in this state. Data stored within the serial-data interface latches will G A C B D F E Table 1. Serial-Interface Control Word BIT MNEMONIC DESCRIPTION MSB 7 D7 High-power/low-noise mode select 6 D6 Gain code, bit 6 5 D5 Gain code, bit 5 4 D4 Gain code, bit 4 3 D3 Gain code, bit 3 2 D2 Gain code, bit 2 1 D1 Gain code, bit 1 LSB 0 D0 Gain code, bit 0 D7 D6 A. tSENS B. tSDAS C. tSDAH D. tSCLKL D5 D4 D3 D2 D1 D0 E. tSCLKH F. tSENH G. tDATAH/tDATAL Figure 1. Serial-Interface Timing Diagram Table 2. Chip State Control Bits GAIN CODE (DECIMAL) GAIN* (DB) SHDN TXEN D7 D6 D5 D4 D3 D2 D1 D0 0 X X X X X X X X X Shutdown Mode 1 0 X X X X X X X X Transmit-Disable Mode 1 1 1 X X X X X X X Transmit-Enable Mode, High Power 1 1 0 X X X X X X X 1 1 0 0 1 1 0 0 0 0 1 1 0 1 0 1 0 0 0 STATES Transmit- Enable Mode, Low Noise 48 -26 0 80 -10 115 8 1 1 0 1 1 1 0 0 1 1 1 1 1 1 0 1 0 1 1 1 87 9 1 1 1 1 1 0 1 1 1 0 110 20 1 1 1 1 1 1 1 1 0 1 125 28 *Typical Gain at +25°C, VCC = 5.0V ______________________________________________________________________________________ 17 MAX3514/MAX3516/MAX3517 the state of the PGA and the output amplifiers. Tables 1 and 2 show the register format. Serial-interface timing is shown in Figure 1. MAX3514/MAX3516/MAX3517 Upstream CATV Amplifiers be lost upon entering this mode. Current consumption is reduced to 10µA (typ) in shutdown mode. adequate balance between half-windings to achieve substantial transient cancellation. Output Match Finally, keep in mind that transformer core inductance varies proportionally with temperature. If the application requires low temperature extremes (less than 0°C), adequate primary inductance must be present to sustain low-frequency output capability as temperatures drop. In general, this will not be a problem as modern RF transformers have adequate bandwidth. MAX3514/MAX3516 When used in conjunction with a 2:1 voltage-ratio transformer, the MAX3514/MAX3516 are internally resistively matched to 75Ω. This internal resistor is across the OUT+ and OUT- terminals. To improve the match at the high end of the frequency range (65MHz), a reactive match may be employed as part of the ensuing diplex filter. A series inductor (typ 180nH) followed by a shunt capacitor (typ 33µF) can be placed directly after the output transformer. This match will also improve the gain flatness substantially. As mentioned above, the matching components may be incorporated into the diplex filter design. Optimize the input impedance of the diplex filter to be 35 + j35 (typ) at 65MHz when using the specified output transformer. MAX3517 The MAX3517 does not have an internal matching resistor. This allows the device performance to be optimized for various load impedances. When 300Ω resistors are placed across the output terminals of the device, performance identical to the MAX3514 will result. If an impedance higher than 300Ω is used, additional gain will result. Note also that a 2:1 voltage-ratio output transformer is not needed. When operating the device with arbitrary output resistance and XFMR turns ratio, take care not to exceed the allowable power dissipation (see Absolute Maximum Ratings). Transformer To match the output of the MAX3514/MAX3516 to a 75Ω load, a 2:1 voltage-ratio transformer is required. This transformer must have adequate bandwidth to cover the intended application. Note that most RF transformers specify bandwidth with a 50Ω source on the primary and a matching resistance on the secondary winding. Operating in a 75Ω system will tend to shift the low-frequency edge of the transformer bandwidth specification up by a factor of 1.5 due to primary inductance. Keep this in mind when specifying a transformer. Bias to the output stage is provided through the center tap on the transformer primary. This greatly diminishes the on/off transients present at the output when switching between transmit and transmit-disable modes. Commercially available transformers typically have 18 Input Circuit To achieve rated performance, the inputs of the MAX3514/MAX3516/MAX3517 must be driven differentially with an appropriate input level. The differential input impedance is approximately 1.5kΩ. Most applications will require a differential low-pass filter preceding the device. The filter design will dictate a terminating impedance of a specified value. Place this load impedance across the AC-coupled input pins (see Typical Operating Circuit). The MAX3514/MAX3517 have sufficient gain to produce an output level of +61dBmV (QPSK through a 2:1 transformer) when driven with a +34dBmV input signal. The MAX3516 provides an additional 3dB of gain and output level. When a lower input level is present, the maximum output level will be reduced proportionally and output linearity will increase. If an input level greater than +34dBmV is used, the 3rd-order distortion performance will degrade slightly. If single-ended sources drive the MAX3514/MAX3516/ MAX3517, one of the input terminals must be capacitively coupled to ground (IN+ or IN-). The value of this capacitor must be large enough to look like a short circuit at the lowest frequency of interest. For operation at 5MHz with a 75Ω source impedance, a value of 0.001µF will suffice. Layout Issues A well-designed PC board is an essential part of an RF circuit. For best performance, pay attention to powersupply layout issues, as well the output circuit layout. Output Circuit Layout The differential implementation of the MAX3514/ MAX3516/MAX3517s’ output has the benefit of significantly reducing even-order distortion, the most significant of which is 2nd-harmonic distortion. The degree of distortion cancellation depends on the amplitude and phase balance of the overall circuit. It is important to keep the trace lengths from the output pins equal. ______________________________________________________________________________________ Upstream CATV Amplifiers Ground inductance degrades distortion performance. Therefore, ground plane connections to pin 4 and pin 20 should be made with multiple vias if necessary. Exposed Paddle Thermal Considerations The exposed paddle (EP) of the MAX3516’s 20-pin TSSOP-EP package provides a low thermal-resistance path to the die. It is important that the PC board on which the MAX3516 is mounted, be designed to conduct heat from this contact. In addition, the EP should be provided with a low inductance path to electrical ground. It is recommended that the EP be soldered to a ground plane on the PC board, either directly or through an array of plated via holes. Typical Operating Circuit 12 CONTROL LOGIC SHDN GND TXEN VCC 18 20 0.1µF +5V 19 0.001µF 5 + IN+ OUT+ 2:1 16 OUTPUT REXT* INPUT ANTI-ALIAS FILTER +5V REXT* 6 +5V 0.1µF 0.001µF 2 4 3 7 1 IN- MAX3514 MAX3516 MAX3517 OUT- 15 0.1µF 0.1µF VCC CEXT 14 ** GND GND GND 11 10 SCLK GND GND SDA CS 9 8 CONTROL LOGIC * MAX3517 ONLY ** MAX3514/MAX3516 ONLY Chip Information TRANSISTOR COUNT: 1006 ______________________________________________________________________________________ 19 MAX3514/MAX3516/MAX3517 Power-Supply Layout For minimal coupling between different sections of the IC, the ideal power-supply layout is a star configuration. This configuration has a large-value decoupling capacitor at the central power-supply node. The power-supply traces branch out from this node, each going to a separate power-supply node in the circuit. At the end of each of these traces is a decoupling capacitor that provides a very low impedance at the frequency of interest. This arrangement provides local power-supply decoupling at each power-supply pin. The power-supply traces must be made as thick as practical. Upstream CATV Amplifiers TSSOP.EPS MAX3514/MAX3516/MAX3517 Package Information 20 ______________________________________________________________________________________ Upstream CATV Amplifiers QSOP.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 21 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX3514/MAX3516/MAX3517 Package Information (continued)