®
SSOP-16 quad
SO-8 single/dual
SOT-23-5 single MSOP dual
OPA237 OPA2237 OPA4237
SINGLE-SUPPLY OPERATIONAL AMPLIFIERS MicroAmplifier ™ Series
FEATURES
q MICRO-SIZE, MINIATURE PACKAGES Single: SOT-23-5, SO-8 Dual: MSOP-8, SO-8 Quad: SSOP-16 q LOW OFFSET VOLTAGE: 750µV max q WIDE SUPPLY RANGE Single Supply: +2.7V to +36V Dual Supply: ±1.35V to ±18V q LOW QUIESCENT CURRENT: 350µA max q WIDE BANDWIDTH: 1.5MHz
DESCRIPTION
The OPA237 op amp family is one of Burr-Brown’s MicroAmplifier™ series of miniature products. In addition to small size, these devices feature low offset voltage, low quiescent current, low bias current, and a wide supply range. Single, dual, and quad versions have identical specifications for maximum design flexibility. They are ideal for single supply, battery operated, and space-limited applications, such as PCMCIA cards and other portable instruments. OPA237 series op amps can operate from either single or dual supplies. When operated from a single supply, the input common-mode range extends below ground and the output can swing to within 10mV of ground. Dual and quad designs feature completely independent circuitry for lowest crosstalk and freedom from interaction. Single, dual, and quad are offered in space-saving surface-mount packages. The single version is available in the ultra-miniature 5-lead SOT-23-5 and SO-8 surface-mount. The dual version comes in a miniature MSOP-8 and SO-8 surface-mount. The quad is available in an SSOP-16. The SSOP-16 has the same body size as an SO-8 with 16 leads, while the MSOP-8 has the same lead count as a SO-8 but half the size. The SOT-23-5 is even smaller at one-fourth the size of an SO-8. All are specified for –40°C to +85°C operation. A macromodel is available for design analysis.
OPA4237
APPLICATIONS
q BATTERY POWERED INSTRUMENTS q PORTABLE DEVICES q PCMCIA CARDS q MEDICAL INSTRUMENTS q TEST EQUIPMENT
OPA237 Out V– +In 1 2 3 4 –In 5 V+
SOT-23-5
Out A
1 2 A D 3 4 5 B C 6 7 8 SSOP-16
16 15 14 13 12 11 10 9
Out D –In D +In D V– +In C –In C Out C NC
OPA237 NC –In +In V– 1 2 3 4 SO-8 8 7 6 5 NC V+ Output NC Out A –In A +In A V– 1 2 3 4
OPA2237 8 A B 7 6 5 SO-8, MSOP-8 V+ Out B –In B +In B
–In A +In A V+ +In B –In B Out B NC
InternationalAirportIndustrialPark • MailingAddress:POBox11400,Tucson,AZ85734 • StreetAddress:6730S.TucsonBlvd.,Tucson,AZ 85706 • Tel:(520)746-1111 • Twx:910-952-1111 Internet:http://www.burr-brown.com/ • FAXLine:(800)548-6133(US/CanadaOnly) • Cable:BBRCORP • Telex:066-6491 • FAX:(520)889-1510 • ImmediateProductInfo:(800)548-6132
© 1996 Burr-Brown Corporation
PDS-1327B
Printed in U.S.A. October, 1996
SPECIFICATIONS: VS = +5V
At TA = +25 °C, VS = +5V, RL = 10kΩ connected to VS/2, unless otherwise noted. OPA237UA, NA OPA2237UA, EA OPA4237UA PARAMETER OFFSET VOLTAGE Input Offset Voltage vs Temperature(1) vs Power Supply (PSRR) Channel Separation (dual and quad) INPUT BIAS CURRENT Input Bias Current(2) Input Offset Current NOISE Input Voltage Noise, f = 0.1 to 10Hz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time: 0.1% 0.01% OUTPUT Voltage Output, Positive Negative Positive Negative Positive Negative Short-Circuit Current Capacitive Load Drive (stable operation) POWER SUPPLY Specified Operating Voltage Operating Range Quiescent Current (per amplifier) TEMPERATURE RANGE Specified Range Operating Range Storage Thermal Resistance, θJA 5-Lead SOT-23-5 MSOP-8 Surface-Mount SSOP-16 Surface-Mount SO-8 Surface-Mount VO = 0.5V to 4V 80 –0.2 78 CONDITION VCM = 2.5V Specified Temperature Range VS = +2.7V to +36V MIN TYP ±250 ±2 10 0.5 –10 ±0.5 1 28 60 (V+) –1.5 86 5 • 106 || 4 5 • 109 || 2 88 1.4 0.5 11 16 (V+) –1 0.01 (V+) –1 0.12 (V+) –1 0.5 (V+) –0.75 0.001 (V+) –0.75 0.04 (V+) –0.75 0.35 –10/+4 See Typical Curves +5 +2.7 170 –40 –55 –55 200 150 150 150 +36 350 +85 +125 +125 MAX ±750 ±5 30 UNITS µV µV/°C µV/V µV/V nA nA µVp-p nV/√Hz fA/√Hz V dB Ω || pF Ω || pF dB MHz V/µs µs µs V V V V V V mA
VCM = 2.5V VCM = 2.5V
–40 ±10
VCM = –0.2V to 3.5V
G=1 G = –1, 3V Step, CL = 100pF G = –1, 3V Step, CL = 100pF RL = 100kΩ to Ground RL = 100kΩ to Ground RL = 100kΩ to 2.5V RL = 100kΩ to 2.5V RL = 10kΩ to 2.5V RL = 10kΩ to 2.5V
V V µA °C °C °C °C/W °C/W °C/W °C/W
NOTES: (1) Guaranteed by wafer-level test to 95% confidence. (2) Positive conventional current flows into the input terminals.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
OPA237, 2237, 4237
2
SPECIFICATIONS: VS = +2.7V
At TA = +25°C, VS = +2.7V, RL = 10kΩ connected to VS/2, unless otherwise noted. OPA237UA, NA OPA2237UA, EA OPA4237UA PARAMETER OFFSET VOLTAGE Input Offset Voltage vs Temperature(1) vs Power Supply (PSRR) Channel Separation (dual and quad) INPUT BIAS CURRENT Input Bias Current(2) Input Offset Current NOISE Input Voltage Noise, f = 0.1 to 10Hz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time: 0.1% 0.01% OUTPUT Voltage Output, Positive Negative Positive Negative Positive Negative Short-Circuit Current Capacitive Load Drive (stable operation) POWER SUPPLY Specified Operating Voltage Operating Range Quiescent Current (per amplifier) TEMPERATURE RANGE Specified Range Operating Range Storage Thermal Resistance, θJA 5-Lead SOT-23-5 MSOP-8 Surface-Mount SSOP-16 Surface-Mount SO-8 Surface-Mount VO = 0.5V to 1.7V 80 –0.2 75 CONDITION VCM = 1V Specified Temperature Range VS = +2.7V to +36V MIN TYP ±250 ±2 10 0.5 –10 ±0.5 1 28 60 (V+) –1.5 85 5 • 106 || 4 5 • 109 || 2 88 1.2 0.5 5 8 (V+) –1 0.01 (V+) –1 0.06 (V+) –1 0.3 (V+) –0.75 0.001 (V+) –0.75 0.02 (V+) –0.75 0.2 –5/+3.5 See Typical Curves +2.7 +2.7 160 –40 –55 –55 200 150 150 150 +36 350 +85 +125 +125 MAX ±750 ±5 30 UNITS µV µV/°C µV/V µV/V nA nA µVp-p nV/√Hz fA/√Hz V dB Ω || pF Ω || pF dB MHz V/µs µs µs V V V V V V mA
VCM = 1V VCM = 1V
–40 ±10
VCM = –0.2V to 1.2V
G=1 G = –1, 1V Step, CL = 100pF G = –1, 1V Step, CL = 100pF RL = 100kΩ to Ground RL = 100kΩ to Ground RL = 100kΩ to 1.35V RL = 100kΩ to 1.35V RL = 10kΩ to 1.35V RL = 10kΩ to 1.35V
V V µA °C °C °C °C/W °C/W °C/W °C/W
NOTES: (1) Guaranteed by wafer-level test to 95% confidence. (2) Positive conventional current flows into the input terminals.
®
3
OPA237, 2237, 4237
SPECIFICATIONS: VS = ±15V
At TA = +25 °C, VS = ±15V, RL = 10kΩ connected to VS/2, unless otherwise noted. OPA237UA, NA OPA2237UA, EA OPA4237UA PARAMETER OFFSET VOLTAGE Input Offset Voltage vs Temperature(1) vs Power Supply (PSRR) Channel Separation (dual and quad) INPUT BIAS CURRENT Input Bias Current(2) Input Offset Current NOISE Input Voltage Noise, f = 0.1 to 10Hz Input Voltage Noise Density, f = 1kHz Current Noise Density, f = 1kHz INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection INPUT IMPEDANCE Differential Common-Mode OPEN-LOOP GAIN Open-Loop Voltage Gain FREQUENCY RESPONSE Gain-Bandwidth Product Slew Rate Settling Time: 0.1% 0.01% OUTPUT Voltage Output, Positive Negative Positive Negative Short-Circuit Current Capacitive Load Drive (stable operation) POWER SUPPLY Specified Operating Voltage Operating Range Quiescent Current (per amplifier) TEMPERATURE RANGE Specified Range Operating Range Storage Thermal Resistance, θJA 5-Lead SOT-23-5 MSOP-8 Surface-Mount SSOP-16 Surface-Mount SO-8 Surface-Mount VO = –14V to 13.8V 80 (V–) –0.2 80 CONDITION VCM = 0V Specified Temperature Range VS = ±1.35V to ±18V MIN TYP ±350 ±2.5 10 0.5 –8.5 ±0.5 1 28 60 (V+) –1.5 90 5 • 106 || 4 5 • 109 || 2 88 1.5 0.5 18 21 (V+) –1.2 (V–) +0.5 (V+) –1.2 (V–) +1 (V+) –0.9 (V–) +0.3 (V+) –0.9 (V–) +0.85 –8/+4.5 See Typical Curves ±15 ±200 MAX ±950 ±7 30 UNITS µV µV/°C µV/V µV/V nA nA µVp-p nV/√Hz fA/√Hz V dB Ω || pF Ω || pF dB MHz V/µs µs µs V V V V mA
VCM = 0V VCM = 0V
–40 ±10
VCM = –15V to 13.5V
G=1 G = –1, 10V Step, CL = 100pF G = –1, 10V Step, CL = 100pF RL = 100kΩ RL = 100kΩ RL = 10kΩ RL = 10kΩ
±1.35
±18 ±475 +85 +125 +125
V V µA °C °C °C °C/W °C/W °C/W °C/W
–40 –55 –55 200 150 150 150
NOTES: (1) Guaranteed by wafer-level test to 95% confidence. (2) Positive conventional current flows into the input terminals.
®
OPA237, 2237, 4237
4
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to V– ..................................................................... 36V Input Voltage ....................................................... (V–) –0.7V to (V+) +0.7V Output Short-Circuit(1) ....................................................................................... Continuous Operating Temperature ................................................... –40°C to +125°C Storage Temperature ...................................................... –55°C to +125°C Junction Temperature .................................................................... +150°C Lead Temperature (soldering, 10s) .................................................. 300°C NOTE: (1) Short circuit to ground, one amplifier per package.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
PACKAGE DRAWING NUMBER(1) TEMPERATURE RANGE –40°C to +85°C PACKAGE MARKING ORDERING NUMBER(2)
PRODUCT Single OPA237NA
PACKAGE
5-Lead SOT-23-5
331
A37A
"
OPA237UA Dual OPA2237EA
"
SO-8 Surface-Mount MSOP-8 Surface-Mount
"
182 337
"
–40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C
"
OPA237UA B37A
OPA237NA-250 OPA237NA-3K OPA237UA OPA2237EA-250 OPA2237EA-2500 OPA2237UA OPA4237UA-250 OPA4237UA-2500
"
OPA2237UA Quad OPA4237UA
"
SO-8 Surface-Mount SSOP-16 Surface-Mount
"
182 322
"
"
OPA2237UA OPA4237UA
"
"
"
"
"
NOTE: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with -250, -2500, and -3K are available only in Tape and Reel in the quantity indicated (e.g., -250 indicates 250 devices per reel). Ordering 3000 pieces of “OPA237NA-3K” will get a single 3000 piece Tape and Reel. SO-8 models are available in tubes or Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.
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5
OPA237, 2237, 4237
TYPICAL PERFORMANCE CURVES
At TA = +25°C and RL = 10kΩ, unless otherwise noted.
OPEN-LOOP GAIN/PHASE vs FREQUENCY 100 G 80 CL = 100pF 0
POWER SUPPLY and COMMON-MODE REJECTION vs FREQUENCY 120 +PSR (VS = +5V, ±15V) 100
Voltage Gain (dB)
PSR, CMR (dB)
60 40 20 0 –20 1
VS = ±15V –90 –135 VS = +2.7V, +5V –180
Phase (°)
Φ
–45
80 60 40 20 0 +PSR (VS = +2.7V)
CMR (VS = +2.7V, +5V or ±15V)
–PSR (VS = ±15V) 10 100 1k 10k 100k 1M 10M
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
Frequency (Hz)
INPUT NOISE AND CURRENT NOISE SPECTRAL DENSITY vs FREQUENCY 1k
CHANNEL SEPARATION vs FREQUENCY 130
Channel Separation (dB)
120
Voltage Noise (nV/√Hz) Current Noise (fA/√Hz)
110
100
Current Noise
100
90
Voltage Noise 10 1 10 100 1k 10k 100k Frequency (Hz)
80
Dual and quad devices. G = 1, all channels. Quad measured channel A to D or B to C—other combinations yield improved rejection. 10 100 1k Frequency (Hz) 10k 100k
INPUT BIAS CURRENT vs TEMPERATURE 14
–12 –11
INPUT BIAS CURRENT vs INPUT COMMON-MODE VOLTAGE
Input Bias Current (nA)
VS = +2.7V, +5V
Input Bias Current (nA)
12
VS = +2.7V
VS = +5V
–10 –9 –8 –7 –6 VS = ±15V
10
8 VS = ±15V 6
4 –75 –50 –25 0 25 50 75 100 125 Temperature (°C)
–15
–10
–5
0
5
10
15
Common-Mode Voltage (V)
®
OPA237, 2237, 4237
6
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C and RL = 10kΩ, unless otherwise noted.
OFFSET VOLTAGE PRODUCTION DISTRIBUTION 12.5 Typical production distribution of packaged units. Single, dual, and quad units included. VS = +2.7V, +5V
OFFSET VOLTAGE PRODUCTION DISTRIBUTION 9 8 Typical production distribution of packaged units. Single, dual, and quad units included. VS = ±15V
Percent of Amplifiers (%)
Percent of Amplifiers (%)
10
7 6 5 4 3 2 1 0
7.5
5
2.5 0.2% 0
–750 –650 –550 –450 –350 –250 –150 –50 50 150 250 350 450 550 650 750
0.7%
0.4%
0.1%
0.1%
Offset Voltage (µV)
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 30 VS = +2.7V 25 Typical production distribution of packaged units. Single, dual, and quad units included.
16 14
Percent of Amplifiers (%)
Percent of Amplifiers (%)
12 10 8 6 4 2 0
20 15 10 5 0
0.2%
0.2%
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
1
2
3
4
5
6
7
0.5
1.5
2.5
3.5
4.5
5.5
6.5
7.5
8.5
9.5
10.5
11.5
Offset Voltage Drift (µV/°C)
Offset Voltage Drift (µV/°C)
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION 12 VS = ±15V 10
Percent of Amplifiers (%)
120
AOL, CMR, PSR vs TEMPERATURE CMR AOL PSR
AOL, CMR, PSR (dB)
Typical production distribution of packaged units. Single, dual, and quad units included.
110 100
VS = +2.7V, +5V, ±15V
8 6 4 2 0
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8
VS = ±15V 90 80 70 60 –75 –50 –25 0 25 VS = +2.7V, +5V
VS = +2.7V, +5V
0.4%
0.2% 0.4%
VS = ±15V
50
75
100
Offset Voltage Drift (µV/°C)
Temperature (°C)
8
125
®
7
–950 –850 –750 –650 –550 –450 –350 –250 –150 –50 50 150 250 350 450 550 650 750 850 950
Offset Voltage (µV)
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION VS = +5V Typical production distribution of packaged units. Single, dual, and quad units included. 0.6% 0.2% 0.4% 0.2%
OPA237, 2237, 4237
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C and RL = 10kΩ, unless otherwise noted.
SMALL-SIGNAL STEP RESPONSE G = 1, C L = 100pF, VS = +5V
SMALL-SIGNAL STEP RESPONSE G = 1, CL = 220pF, VS = +5V
20mV/div
20mV/div
1µs/div
2µs/div
LARGE-SIGNAL STEP RESPONSE G = 1, C L = 100pF, VS = +5V
SETTLING TIME vs GAIN 100 VS = +5V, 3V Step
Settling Time (µs)
VS = ±15V, 10V Step
1V/div
10
VS = +2.7V, 1V Step 1
10µs/div
0.01% 0.1% –10 Gain (V/V) –100
–1
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT V+ (V+) –0.5
Output Voltage Swing (V)
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE 70 60 50 G = +1, VS = +2.7V, +5V G = +1, VS = ±15V G = –1, VS = +2.7V, +5V G = –1, VS = ±15V G = –2, VS = +2.7V, +5V G = –2, VS = ±15V G = –10, VS = +2.7V, +5V, ±15V
(V+) –1 (V+) –1.5 (V+) –2 +125°C
Sourcing Current +25°C
Overshoot (%)
–55°C
40 30 20 10 0
(V–) +2 (V–) +1.5 (V–) +1 (V–) +0.5 V– 0 1 +125°C 2 –55°C
Sinking Current
+125°C
+25°C
3
4
5
10
100
1k
10k
Output Current (mA)
Load Capacitance (pF)
®
OPA237, 2237, 4237
8
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C and RL = 10kΩ, unless otherwise noted.
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY 30 25
QUIESCENT CURRENT vs TEMPERATURE 300 VS = ±15V
Output Voltage (Vp-p)
20 15 10 5 0 1k 10k VS = +5V VS = +2.7V
Maximum output voltage without slew-rate induced distortion
Quiescent Current (µA)
VS = ±15V
250
200
150 VS = +5V 100 VS = +2.7V
50
100k Frequency (Hz) 1M
–75
–50
–25
0
25
50
75
100
125
Temperature (°C)
SHORT-CIRCUIT CURRENT vs TEMPERATURE 12 10 8 6 ISC 4 ISC 2 0 –75 –50 –25 0 25 50 75 100 125 Temperature (°C) VS = ±15V VS = +2.7V VS = +5V
+ _
VS = +5V
Short-Circuit Current (mA)
VS = ±15V
VS = +2.7V
®
9
OPA237, 2237, 4237
APPLICATIONS INFORMATION
OPA237 series op amps are unity-gain stable and suitable for a wide range of general-purpose applications. Power supply pins should be bypassed with 10nF ceramic capacitors. OPERATING VOLTAGE OPA237 series op amps operate from single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies with excellent performance. Most behavior remains unchanged throughout the full operating voltage range. Parameters which vary significantly with operating voltage are shown in typical performance curves. Specifications are production tested with +2.7V, +5V, and ±15V supplies. OUTPUT CURRENT AND STABILITY OPA237 series op amps can drive large capacitive loads. However, under certain limited output conditions any op amp may become unstable. Figure 1 shows the region where the OPA237 has a potential for instability. These load conditions are rarely encountered, especially for single supply applications. For example, take the case when a
+5V supply with a 10kΩ load to VS/2 is used. OPA237 series op amps remain stable with capacitive loads up to 4,000pF, if sinking current and up to 10,000pF, if sourcing current. Furthermore, in single supply applications where the load is connected to ground, the op amp is only sourcing current, and as shown in Figure 1, can drive 10,000pF with output currents up to 1.5mA.
100k OPERATION NOT RECOMMENDED Capacitive Load (pF) 10k
1k VS = +5V, ±15V VS = +2.7V 10 –2 –1.5 –1 –0.5 0 0.5 1 1.5 2 Output Current (mA)
100
FIGURE 1. Stability-Capacitive Load vs Output Current.
RH 10Ω To Load IH R1 38.3kΩ R3 38.3kΩ R5 383kΩ V+ –In A1 +In OPA237 Out VO = 10 • IH • RH
High-Side Current Sense
V+ for A1, A2 + 2.7V to ±15V R8 100kΩ V+ –In A2 +In OPA237 Out
R4 20kΩ
R2 19.1kΩ
V–
R2 and R4 divide down the common-mode input to A1.
V– for A1, A2
VO = 10 • IL • RL
R6 10kΩ RL 10Ω IL
V– R7 9.09kΩ
Low-Side Current Sense
Common-mode range of A2 extends to V– for low-side sensing.
Optional for IB Cancellation (R7 = R6 II R8) To Load
NOTE: Low and high-side sensing circuits can be used independently.
FIGURE 2. Low and High-Side Battery Current Sensing.
®
OPA237, 2237, 4237
10
