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Part: OPA685
Category:
Description:
Company: Texas Instruments, Inc.
Datasheet: Download OPA685 datasheet File size : 534 kB
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OPA 685
OPA 685
OPA685
For most current data sheet and other product information, visit www.burr-brown.com
Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable
TM
FEATURES
q q q q q q q GAIN = +2 BANDWIDTH (900MHz) GAIN = +8 BANDWIDTH (420MHz) OUTPUT VOLTAGE SWING: ±3.6V ULTRA-HIGH SLEW RATE: 4200V/µs 3RD-ORDER INTERCEPT: > 40dBm (f < 50MHz) LOW POWER: 129mW LOW DISABLED POWER: 3mW
APPLICATIONS
q q q q q q q LOW COST PRECISION IF AMPLIFIER CABLE MODEM UPSTREAM DRIVER BROADBAND VIDEO LINE DRIVER VERY WIDEBAND ADC BUFFER PORTABLE INSTRUMENTS ACTIVE FILTERS ARB WAVEFORM OUTPUT DRIVER
DESCRIPTION
The OPA685 is a very high bandwidth, current-feedback op amp that combines exceptional 4200V/µs slew rate and low input voltage noise to deliver a precision low cost, high dynamic range Intermediate Frequency (IF) amplifier. Optimized for high gain operation, the OPA685 is ideally suited to buffering Surface Acoustic Wave (SAW) filters in an IF strip or delivering high output power at low distortion for cable modem upstream line drivers. Even higher bandwidth at lower gains gives a 900MHz video line driver for high resolution workstation graphics. The OPA685's low 12.9mA supply current is precisely trimmed at +25°C. This trim, along with a low temperature drift, guarantees low system power overtemperature. System power may be further reduced using the optional disable control pin. Leaving this pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA685 supply current drops to less than 320µA. This power-savings feature, along with exceptional single +5V operation, and ultra-small SOT23-6 packaging, make the OPA685 ideal for portable communications requirements. OPA685 RELATED PRODUCTS
SINGLES OPA658 OPA681 OPA682 DUALS OPA2658 OPA2681 OPA2682
TWO-TONE, 3rd-ORDER INTERMODULATION INTERCEPT 50
+5V
Output Intercept (dBm)
40
50 OPA685
Matching Network 50 SAW Filter
30
5 0 Source
50
5V
400
20
Low Distortion, 12dB Gain SAW Driver
10 0 50 100 150 200 250 Center Frequency (MHz)
International Airport Industrial Park · Mailing Address: PO Box 11400, Tucson, AZ 85734 · Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 · Tel: (520) 746-1111 Twx: 910-952-1111 · Internet: http://www.burr-brown.com/ · Cable: BBRCORP · Telex: 066-6491 · FAX: (520) 889-1510 · Immediate Product Info: (800) 548-6132
©
1999 Burr-Brown Corporation
PDS-1499A
Printed in U.S.A. April, 1999
SBOS112
SPECIFICATIONS: VS = ±5V
RF = 402, RL = 100, and G = +8, (Figure 1 for AC performance only), unless otherwise noted. OPA685U, N TYP +25°C 1200 900 420 340 350 3 350 4200 2900 0.7 1.0 4 3 66 75 90 84 1.7 13 19 0.10 0.01 42 ±1.7 +56 ±10 +25°C(2) GUARANTEED 0°C to 70°C(3) 40°C to +85°C(3) MIN/ TEST MAX LEVEL(1) typ typ min typ min max typ min min typ typ typ typ max max max max max max max typ typ min max max max max max max min min typ typ min min min min typ typ typ typ typ typ typ typ min max max typ max max min typ typ typ typ C C B C B B C B B C C C C B B B B B B B C C A A B A B A B A A C C A A A A C C C C C C C C A A A C A A A A C C C
PARAMETER AC PERFORMANCE (Figure 1) Small-Signal Bandwidth (VO = 0.5Vp-p)
CONDITIONS G = +1, RF = 523 G = +2, RF = 511 G = +8, RF = 402 G = +16, RF = 249 G = +2, VO = 0.5Vp-p, RF =523 RF = 523, VO = 0.5Vp-p G = +8, VO = 4Vp-p G = 8, VO = 4V Step G = +8, VO = 4V Step G = +8, VO = 0.5V Step G = +8, VO = 4V Step G = +8, VO = 2V Step G = +8, VO = 2V Step G = +8, f = 10MHz, VO = 2Vp-p RL = 100 RL 500 RL = 100 RL 500 f > 1MHz f > 1MHz f > 1MHz G = +2, NTSC, VO = 1.4Vp, RL = 150 G = +2, NTSC, VO = 1.4Vp, RL = 150 VO = 0V, RL = 100 VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V VCM = 0V
UNITS MHz MHz MHz MHz MHz dB MHz V/µs V/µs ns ns ns ns dBc dBc dBc dBc nV/Hz pA/Hz pA/Hz % deg k mV µV/°C µA nA/°C µA nA°/C V dB k || pF V V mA mA µA ns ns dB pF mV mV V V µA V V mA mA dB °C °C/W °C/W
360 150 4.5 3000 2400
350 80 5 2500 2400
320 70 6.0 2200 2100
Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large Signal Bandwidth Slew Rate Rise/Fall Time Settling Time to 0.02% 0.1% Harmonic Distortion 2nd Harmonic 3rd Harmonic
Input Voltage Noise Non-Inverting Input Current Noise Inverting Input Current Noise Differential Gain Differential Phase DC PERFORMANCE(4) Open-Loop Transimpedance Gain (ZOL) Input Offset Voltage Average Offset Voltage Drift Non-Inverting Input Bias Current Average Non-Inverting Input Bias Current Drift Inverting Input Bias Current Average Inverting Input Bias Current Drift INPUT Common-Mode Input Range(5) (CMIR) Common-Mode Rejection Ratio (CMRR) Non-Inverting Input Impedance Inverting Input Resistance (RI) OUTPUT Voltage Output Swing Current Output, Sourcing Current Output, Sinking Closed-Loop Output Impedance DISABLE (Disabled Low) Power Down Supply Current (+VS) Disable Time Enable Time Off Isolation Output Capacitance in Disable Turn On Glitch Turn Off Glitch Enable Voltage Disable Voltage Control Pin Input Bias Current (DIS) POWER SUPPLY Specified Operating Voltage Maximum Operating Voltage Range Max Quiescent Current Min Quiescent Current Power Supply Rejection Ratio (PSRR) TEMPERATURE RANGE Specification: U, N Thermal Resistance, JA U SO-8 N SOT23-6
59 69 83 78 1.8 15 22
56 66 77 76 2.2 15 22
53 63 74 75 2.3 15 22
±3.5
+90
26
±100 ±3.2
49
24 ±5 +35 ±100 530 ±120 500 ±3.1 48
23 ±7 +40 ±130 570 ±150 560 ±3.0 48
VCM = 0V Open-Loop No Load 100 Load VO = 0 VO = 0 G = +8, f = 100kHz V DIS = 0 G = +8, 10MHz G = +2, RL = 150, VIN = 0 G = +2, RL = 150, VIN = 0 V DIS = 0
±3.4 54 87 || 2 19 ±4.1 ±3.6 +130 90 0.2 320 100 100 70 3 ±160 ±20 3.3 1.8 115 ±5
±3.9 ±3.3
+90 60
±3.8 ±3.2 +75 50
±3.8 ±3.1 +70 45
3.5 1.7 160
3.6 1.6 160
3.7 1.5 160
VS = ±5V VS = ±5V Input Referred
±6
13.5 12.5 49
12.9 12.9 55 40 to +85
±6 13.5 11.9 47
±6 13.5 11.2 46
Junction-to-Ambient 125 150
NOTES: (1) Test levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation. (C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive out-of-node. VCM is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMRR at ± CMIR limits.
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OPA685
2
SPECIFICATIONS: VS = +5V
RF = 348, RL = 100 to VS / 2, and G = +8, (Figure 3 for AC performance only), unless otherwise noted. OPA685U, N TYP +25°C 600 450 350 250 140 0.4 350 1900 0.8 1.0 9 7 60 68 58 60 1.7 13 19 40 ±1 +40 ±50 +25°C(2) GUARANTEED 0°C to 70°C(3) 40°C to +85°C(3) MIN/ TEST MAX LEVEL(1) typ min typ typ min max typ min typ typ typ typ max max max max max max max min max max max max max max max min min typ typ min min max max min min typ typ typ typ typ typ typ typ min max typ typ max max min min typ typ typ C B C C B B C B C C C C B B B B B B B A A B A B A B A A A C C A A A A A A C C C C C C C C A A C C A A A A C C C
PARAMETER AC PERFORMANCE (Figure 3) Small-Signal Bandwidth (VO = 0.5Vp-p)
CONDITIONS G = +1, RF = 511 G = +2, RF = 487 G = +8, RF = 348 G = +16, RF = 162 G = +2, VO 1MHz f > 1MHz f > 1MHz VO = VS / 2, RL = 100 to VS / 2 V CM = V S / 2 V CM = V S / 2 V CM = V S / 2 V CM = V S / 2 V CM = V S / 2 V CM = V S / 2
UNITS MHz MHz MHz MHz MHz dB MHz V/µs ns ns ns ns dBc dBc dBc dBc nV/Hz pA/Hz pA/Hz k mV µV/°C µA nA/°C µA nA / °C V V dB k || pF V V V V mA mA µA ns ns dB pF mV mV V V µA V V mA mA dB °C °C/W °C/W
240 80 1.0 1300
220 70 1.5 1200
200 60 1.5 1100
Bandwidth for 0.1dB Gain Flatness Peaking at a Gain of +1 Large Signal Bandwidth Slew Rate Rise/Fall Time Settling Time to 0.02% 0.1% Harmonic Distortion 2nd Harmonic 3rd Harmonic Input Voltage Noise Non-Inverting Input Current Noise Inverting Input Current Noise DC PERFORMANCE(4) Open-Loop Transimpedance Gain (ZOL) Input Offset Voltage Average Offset Voltage Drift Non-Inverting Input Bias Current Average Non-Inverting Input Bias Current Drift Inverting Input Bias Current Average Inverting Input Bias Current Drift INPUT Least Positive Input Voltage(5) Most Positive Input Voltage(5) Common-Mode Rejection Ratio (CMRR) Non-Inverting Input Impedance Inverting Input Resistance (RI ) OUTPUT Most Positive Output Voltage Least Positive Output Voltage Current Output, Sourcing Current Output, Sinking Closed-Loop Output Impedance DISABLE (Disable Low) Power Down Supply Current (+VS) Disable Time Enable Time Off Isolation Output Capacitance in Disable Turn On Glitch Turn Off Glitch Enable Voltage Disable Voltage Control Pin Input Bias Current (DIS) POWER SUPPLY Specified Single-Supply Operating Voltage Max Single-Supply Operating Voltage Max Quiescent Current Min Quiescent Current Power Supply Rejection Ratio (PSRR) TEMPERATURE RANGE Specification: U, N Thermal Resistance, JA U SO-8 N SOT23-6
54 60 51 55 1.8 15 22
53 59 50 54 2.2 15 22 23 ±3.5 12 ±120 550 ±120 550 1.9 3.1 47
52 58 50 54 2.2 15 22 20 ±4.0 15 ±150 650 ±150 650 2.0 3.0 47
±3
+110
25
±100
1.8 3.2 48
V CM = V S / 2 Open-Loop No Load RL = 100 to VS / 2 No Load RL = 100 to VS / 2 VO = V S / 2 VO = V S / 2 G = +2, f = 100kHz VDIS = 0 G = +8, 10MHz G = +2, RL = 150, VIN = VS /2 G = +2, RL = 150, VIN = VS /2 V DIS = 0
1.7 3.3 54 87 || 2 23 4.1 4.0 0.9 1.0 90 70 0.3 270 150 150 70 3 ±160 ±20 3.3 1.8 100 5
3.9 3.8 1.1 1.2 62 45
3.7 3.6 1.3 1.4 60 40
3.5 3.4 1.5 1.6 58 38
3.5 1.7
3.6 1.6
3.7 1.5
VS = +5V VS = +5V Input Referred
10.7 10.7 54 40 to +85
12 11.3 9.0 51
12 11.3 8.3 49
12 11.3 8.1 48
Junction-to-Ambient 125 150
NOTES: (1) Test levels: (A) 100% tested at 25°C. Over temperature limits by characterization and simulation. (B) Limits set by characterization and simulation. (C) Typical value only for information. (2) Junction temperature = ambient for 25°C guaranteed specifications. (3) Junction temperature = ambient at low temperature limit: junction temperature = ambient +23°C at high temperature limit for over temperature guaranteed specifications. (4) Current is considered positive out-of-node. VCM is the input common-mode voltage. (5) Tested < 3dB below minimum specified CMRR at ±CMIR limits.
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3
OPA685
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