LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 LMH6618 Single/LMH6619 Dual 130 MHz, 1.25 mA RRIO Operational Amplifiers Check for Samples: LMH6618, LMH6619 FEATURES 1 • 23 • • • • • • • • • • VS = 5V, RL = 1 kΩ, TA = 25°C and AV = +1, Unless Otherwise Specified. Operating Voltage Range 2.7V to 11V Supply Current per Channel 1.25 mA Small Signal Bandwidth 130 MHz Input Offset Voltage (Limit at 25°C) ±0.75 mV Slew Rate 55 V/µs Settling Time to 0.1% 90 ns Settling Time to 0.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com Typical Application IN 1 PF 549: 549: 150 pF 1.24 k: + V + + V 1 nF V 5V 0.1 PF 1 PF 0.01 PF 14.3 k: 0.1 PF 10 PF C13 C11 - C5 ADC121S101 + 5.6 PF 10 PF C6 22: LMH6618 GND 0.1 PF 390 pF 0.1 PF 14.3 k: These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 +3V ELECTRICAL CHARACTERISTICS Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 3V, V− = 0V, DISABLE = 3V, VCM = VO = V+/2, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes. (1) Symbol Parameter Condition Min (2) Typ (3) Max (2) Units Frequency Domain Response SSBW –3 dB Bandwidth Small Signal AV = 1, RL = 1 kΩ, VOUT = 0.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com +3V ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 3V, V− = 0V, DISABLE = 3V, VCM = VO = V+/2, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 +5V ELECTRICAL CHARACTERISTICS Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 5V, V− = 0V, DISABLE = 5V, VCM = VO = V+/2, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes. Symbol Parameter Condition Min (1) Typ (2) Max (1) Units Frequency Domain Response SSBW –3 dB Bandwidth Small Signal AV = 1, RL = 1 kΩ, VOUT = 0.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com +5V ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 5V, V− = 0V, DISABLE = 5V, VCM = VO = V+/2, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 ±5V ELECTRICAL CHARACTERISTICS Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 5V, V− = −5V, DISABLE = 5V, VCM = VO = 0V, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes. Symbol Parameter Condition Min (1) Typ (2) Max (1) Units Frequency Domain Response SSBW –3 dB Bandwidth Small Signal AV = 1, RL = 1 kΩ, VOUT = 0.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com ±5V ELECTRICAL CHARACTERISTICS (continued) Unless otherwise specified, all limits are guaranteed for TJ = +25°C, V+ = 5V, V− = −5V, DISABLE = 5V, VCM = VO = 0V, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, RL = 1 kΩ || 5 pF. Boldface Limits apply at temperature extremes.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 Connection Diagram VOUT V - 1 6 2 5 DISABLE - + +IN + V 3 4 -IN Figure 1. 6-Pin SOT – Top View (See Package Number DDC0006A) OUT A 1 8 + V A -IN A +IN A 2 - + 7 3 6 B + V - 4 OUT B -IN B 5 +IN B Figure 2.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. Closed Loop Frequency Response for Various Supplies Closed Loop Frequency Response for Various Supplies 3 3 + V = +1.5V 0 -3 ±5V ±1.5V + V = +5V GAIN (dB) GAIN (dB) - V = -2.5V 0 -6 ±2.5V -9 -12 -15 + V = +2.5V - V = -1.5V - V = -5V -3 A = +1 -6 VOUT = 0.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. Closed Loop Gain vs. Frequency for Various Gains Large Signal Frequency Response 3 3 + V = +5V 0 A=1 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 0 -3 A=2 A=5 -6 A = 10 -9 + -12 V = +2.5V V = -2.5V -15 RL = 1 k: -18 CL = 5 pF VOUT = 0.2V -21 1 10 100 - V = -5V + -3 V = +2.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. HD3 vs. Frequency and Supply Voltage -20 V = +1.5V - RL = 1 k: V = -1.5V DISTORTION (dBc) -50 -60 + V = +2.5V -70 - V = -2.5V -80 HD3, RL = 150: - RF = 0: A = +1 -40 DISTORTION (dBc) -20 VOUT = 2 VPP -30 V+ = +2.5V + VOUT = 2 VPP -30 HD2 and HD3 vs.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. HD2 vs. Output Swing Open Loop Gain/Phase 120 120 100 PHASE 40 40 20 + 20 HD2 (dBc) PHASE (°) GAIN (dB) 60 GAIN V = +2.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. HD3 vs. Output Swing THD vs. Output Swing -30 -20 -30 -40 + V = +2.5V 5 MHz -50 -50 - 5 MHz V = -2.5V THD (dBc) HD3 (dBc) 10 MHz -40 10 MHz AV = +2 -60 RL = 150: -70 1 MHz + V = +2.5V - -60 V = -2.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. VOS vs. VCM VOS vs. VS (pnp) 0.3 0.3 -40°C -40°C 0.2 0.2 0.1 VOS (mV) VOS (mV) 0.1 25°C 0 -0.1 -0.2 125°C -0.3 0 25°C - -0.1 V = -0.5V + VS = V - V -0.2 VCM = 0V -0.4 + V = +2.5V -0.5 -0.3 - 125°C V = -2.5V -0.6 -0.5 -0.4 0.5 1.5 2.5 3.5 4.5 5.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. IB vs. VS (npn) IS vs. VS 1.8 1.5 + V = +0.5V VS = V+ - V 1.6 VCM = 0V 1.4 125°C 25°C 1.2 125°C IS (mA) IBIAS (PA) - 25°C 1.0 -40°C 1.0 0.8 - 0.6 V = -0.5V -40°C + - VS = V - V 0.4 VCM = 0.5V 0.5 0 2 4 8 6 10 0.2 0 12 2 4 VS (V) 150 Figure 39. Figure 40.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. PSRR vs. Frequency PSRR vs. Frequency 120 120 100 100 -PSRR -PSRR 80 PSRR (dB) PSRR (dB) 80 +PSRR 60 40 20 +PSRR 60 40 20 + V = +2.5V V = -2.5V 0 10 100 1k + V = +1.5V - - V = -1.5V 10k 100k 1M 0 10 10M 100M 100 1k 10k 100k 1M FREQUENCY (Hz) FREQUENCY (Hz) Figure 45.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. Small Signal Step Response 50 mV/DIV 50 mV/DIV Small Signal Step Response + V = +5V + V = +2.5V - - V = -2.5V A = -1 VOUT = 0.2V VOUT = 0.2V RL = 1 k: RL = 1 k: 25 ns/DIV 25 ns/DIV Figure 51. Figure 52. Small Signal Step Response Small Signal Step Response + V = +1.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. Small Signal Step Response 50 mV/DIV 50 mV/DIV Small Signal Step Response + V = +2.5V - - V = -2.5V A = +2 V = -1.5V A = +2 VOUT = 0.2V VOUT = 0.2V RL = 150: RL = 150: 25 ns/DIV 25 ns/DIV Figure 55. Figure 56.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com TYPICAL PERFORMANCE CHARACTERISTICS (continued) At TJ = 25°C, AV = +1 (RF = 0Ω), otherwise RF = 2 kΩ for AV ≠ +1, unless otherwise specified. Large Signal Step Response Overload Recovery Waveform 6 + VOUT V = +5V - V = -5V A = +5 2 2V/DIV 500 mV/DIV 4 + V = +2.5V - 0 V = -2.5V A = +2 -2 VOUT = 2V -4 VIN RL = 150: -6 50 ns/DIV 100 ns/DIV Figure 59. Figure 60. IS vs. VDISABLE 1600 125°C + V = +2.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 APPLICATION INFORMATION The LMH6618 and LMH6619 are based on TI’s proprietary VIP10 dielectrically isolated bipolar process. This device family architecture features the following: • Complimentary bipolar devices with exceptionally high ft (∼8 GHz) even under low supply voltage (2.7V) and low bias current. • Common emitter push-push output stage. This architecture allows the output to reach within millivolts of either supply rail.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com RS 50: INVERTING INPUT D4 D1 D3 D2 NON-INVERTING INPUT Figure 63. Input Equivalent Circuit During Shutdown When the LMH6618 is shutdown, there may be current flow through the internal diodes shown, caused by input potential, if present. This current may flow through the external feedback resistor and result in an apparent output signal. In most shutdown applications the presence of this output is inconsequential.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 Table 1. Performance Data for the LMH6618 Driving an ADC121S101 Parameter Measured Value Signal Frequency 100 kHz Signal Amplitude 4.5V SINAD 71.5 dB SNR 71.87 dB THD −82.4 dB SFDR 90.97 dB ENOB 11.6 bits When the op amp and the ADC are using the same supply, it is important that both devices are well bypassed. A 0.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com + V V 560: 10 PF + 0.1 PF 10 PF - 33: + V LMH6619 + INPUT 220 pF 0.1 PF 560: 560: 10 PF 560: + V 560: - ADC121S625 33: LMH6619 + 220 pF 560: Figure 66. LMH6619 Driving an ADC121S625 Table 2. Performance Data for the LMH6619 Driving an ADC121S625 Parameter Measured Value Signal Frequency 10 kHz Signal Amplitude 2.5V SINAD 67.9 dB SNR 68.29 dB THD −78.6 dB SFDR 75.0 dB ENOB 11.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 1 PF 549: 549: +IN 150 pF 1.24 k: + V V 1 nF + 0.1 PF 10 PF + V 14.3 k: - 22: LMH6619 0.1 PF + 10 PF 390 pF 0.1 PF 5.6 PF 14.3 k: ADC121S705 1 PF 549: 549: 22: -IN 390 pF 150 pF 1.24 k: + V V 1 nF + 0.1 PF 14.3 k: 10 PF LMH6619 + 0.1 PF 5.6 PF 14.3 k: Figure 67.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com 4. VOUTMID = 2V + (4V – 2V)/2 = 3V 5. Gain = (4V – 2V)/(1V – 0V) = 2 6. ΔVOUT = 3V – 2 x 0.5V = 2 7. For the example the supply voltage will be +5V. 8. Noise gain = 2 + 2/5V = 2.4 9. RF = 2 kΩ 10. R1 = 2 kΩ/2 = 1 kΩ 11. R2 = 2 kΩ/(2.4-2) = 5 kΩ 12. RG = 2 kΩ/(2.4 – 1) = 1.43 kΩ V + + V R2 R1 VIN + VOUT LMH6618 - RG RF Figure 68.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 +5V 0A to 1A 51: + 1 k: 0.1: LMH6618 51: 1 k: Figure 70. Current Sense Amplifier TRANSIMPEDANCE AMPLIFIER By definition, a photodiode produces either a current or voltage output from exposure to a light source. A Transimpedance Amplifier (TIA) is utilized to convert this low-level current to a usable voltage signal. The TIA often will need to be compensated to insure proper operation.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com OP AMP OPEN LOOP GAIN I-V GAIN (:) GAIN (dB) NOISE GAIN (NG) 1 + sRF (CT + CF) 1 + sRFCF 1+ CIN CF 0 dB FREQUENCY fz # 1 2SRFCT fP = 1 GBWP 2SRFCF Figure 72. Bode Plot of Noise Gain Intersecting with Op Amp Open-Loop Gain Figure 72 shows the bode plot of the noise gain intersecting the op amp open loop gain. With larger values of gain, CT and RF create a zero in the transfer function.
LMH6618, LMH6619 www.ti.com SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 Figure 73 shows the frequency response for the various photodiodes in Table 3. 6 NORMALIZED I-V GAIN (dB) 3 0 CPD = 22 pF, -3 CF = 10 pF -6 -9 -12 CF = 5.6 pF CPD = 47 pF, CPD = 100 pF, CF = 15 pF -15 CPD = 222 pF, CF = 18 pF -18 100k 1M 10M 100M 1G FREQUENCY (Hz) Figure 73.
LMH6618, LMH6619 SNOSAV7E – AUGUST 2007 – REVISED OCTOBER 2012 www.ti.com +10V C5 0.1 PF +10V C2 47 PF J1 8 3 VIDEO INPUT GND + 2 C8 0.1 PF U1A + V LMH6619 R5 10 k: 1 VOUT - R16 3.01 k: R10 75: C7 47 PF R9 3.01 k: GND +10V GND GND R4 10 k: + C6 10 PF R13 3.01 k: 4 TWISTED-PAIR R1 75: C1 47 PF + GND R7 3.01 k: R8 3 k: C3 20 PF GND R3 1.50 k: R14 3.01 k: 3 5 - + V LMH6618 + V 2 GND U2 1 C10 47 PF J2 VIDEO OUTPUT GND 6 5 R2 3.
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PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing LMH6618MK/NOPB SOT DDC 6 LMH6618MKE/NOPB SOT DDC LMH6618MKX/NOPB SOT DDC LMH6619MAE/NOPB SOIC LMH6619MAX/NOPB SOIC SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 6 250 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 6 3000 178.0 8.4 3.2 3.
PACKAGE MATERIALS INFORMATION www.ti.com 21-Mar-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMH6618MK/NOPB SOT DDC 6 1000 210.0 185.0 35.0 LMH6618MKE/NOPB SOT DDC 6 250 210.0 185.0 35.0 LMH6618MKX/NOPB SOT DDC 6 3000 210.0 185.0 35.0 LMH6619MAE/NOPB SOIC D 8 250 210.0 185.0 35.0 LMH6619MAX/NOPB SOIC D 8 2500 367.0 367.0 35.
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