opa277_高精度运算放大器

VO = (V–)+0.5V to (V+)–1.2V, RL = 10kΩ
140
VO = (V–)+0.5V to (V+)–1.5V, RL = 2kΩ 126
134
VO = (V–)+0.5V to (V+)–1.5V, RL = 2kΩ 126
VS = ±15V, G = 1, 10V Step VS = ±15V, G = 1, 10V Step
(V+) –1.5
±35
See Typical Curve
Current Noise Density, f = 1kHz
in
INPUT VOLTAGE RANGE Common-Mode Voltage Range Common-Mode Rejection
TA = –40°C to +85°C
VCM CMRR
INPUT IMPEDANCE Differential Common-Mode
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Channel Separation (dual, quad)
PSRR
TA = –40°C to +85°C TA = –40°C to +85°C TA = –40°C to +85°C
TA = –40°C to +85°C TA = –40°C to +85°C TA = –40°C to +85°C
VS = ±2V to ±18V VS = ±2V to ±18V
dc
±10
±20
±10
±25
±30 ±50
±0.1 ±0.15 ±0.1 ±0.25
0.2
±0.3
±0.5
±0.5
0.1
INPUT BIAS CURRENT
Input BLeabharlann Baiduas Current
IB
TA = –40°C to +85°C
Total Harmonic Distortion + Noise THD+N
OUTPUT Voltage Output
TA = –40°C to +85°C
TA = –40°C to +85°C Short-Circuit Current
Capacitive Load Drive
ISC CLOAD
OPA277 series op amps operate from ±2V to ±18V supplies with excellent performance. Unlike most op amps which are specified at only one supply voltage, the OPA277 series is specified for real-world applications; a single limit applies over the ±5V to ±15V supply range. High performance is maintained as the amplifiers swing to their specified limits. Because the initial offset voltage (±20µV max) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications.
®
OPA277
OPA2277
OPA4277
OPA277
OPA2277
OPA4277
OPA277 OPA2277 OPA4277
High Precision OPERATIONAL AMPLIFIERS
FEATURES
DESCRIPTION
q ULTRA LOW OFFSET VOLTAGE: 10µV q ULTRA LOW DRIFT: ±0.1µV/°C q HIGH OPEN-LOOP GAIN: 134dB q HIGH COMMON-MODE REJECTION: 140dB q HIGH POWER SUPPLY REJECTION: 130dB q LOW BIAS CURRENT: 1nA max q WIDE SUPPLY RANGE: ±2V to ±18V q LOW QUIESCENT CURRENT: 800µA/amp q SINGLE, DUAL, AND QUAD VERSIONS q REPLACES OP-07, OP-77, OP-177
OPA277P, U OPA2277P, U
PARAMETER
CONDITION
MIN
TYP(1) MAX
OFFSET VOLTAGE
Input Offset Voltage:
VOS
OPA277P, U (high grade, single)
OPA277P, U (high grade, dual)
OPEN-LOOP GAIN
Open-Loop Voltage Gain
AOL
TA = –40°C to +85°C
FREQUENCY RESPONSE
Gain-Bandwidth Product
GBW
Slew Rate
SR
Settling Time, 0.1%
0.01%
Overload Recovery Time
±0.5
±1
±2
±0.5
±1
±2
0.22 0.11 12
8 8 8 0.2
VCM = (V–) +2V to (V+) –2V VCM = (V–) +2V to (V+) –2V
(V–) +2
(V+) –2
130
140
128
VCM = (V–) +2V to (V+) –2V
100 || 3 250 || 3
APPLICATIONS
q TRANSDUCER AMPLIFIER q BRIDGE AMPLIFIER q TEMPERATURE MEASUREMENTS q STRAIN GAGE AMPLIFIER q PRECISION INTEGRATOR q BATTERY POWERED INSTRUMENTS q TEST EQUIPMENT
dVOS/dT
OPA277P, U (high grade, single)
OPA277P, U (high grade, dual)
All PA, UA Versions
Input Offset Voltage: (all models)
vs Time
vs Power Supply TA = –40°C to +85°C
VIN • G = VS 1kHz, G = 1, VO = 3.5Vrms
1 0.8 14 16 3 0.002
RL = 10kΩ RL = 10kΩ RL = 2kΩ RL = 2kΩ
(V–) +0.5
(V+) –1.2
(V–) +0.5
(V+) –1.2
(V–) +1.5
(V+) –1.5
(V–) +1.5
OPA277
Offset Trim 1
8 Offset Trim
–In 2
7 V+
+In 3
6 Output
V– 4
5 NC
8-Pin DIP, SO-8
OPA2277
Out A 1
8
–In A 2
A
7
+In A 3
B
6
V– 4
5
The OPA277 series precision op amps replace the industry standard OP-177. They offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultra low offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection. Single, dual, and quad versions have identical specifications for maximum design flexibility.
®
© 1997 Burr-Brown Corporation
PDS-1413B
OPA277, 22P7ri7nt,ed4in2U7.S7.A. March, 1998
SPECIFICATIONS: VS = ±5V to VS = ±15V
At TA = +25°C, and RL = 2kΩ, unless otherwise noted. Boldface limits apply over the specified temperature range, –40°C to +85°C.
All PA, UA Versions
Input Offset Voltage Over Temperature OPA277P, U (high grade, single) OPA277P, U (high grade, dual) All PA, UA Versions
Input Offset Voltage Drift
Input Offset Current
IOS
TA = –40°C to +85°C
NOISE Input Voltage Noise, f = 0.1 to 10Hz
Input Voltage Noise Density, f = 10Hz en f = 100Hz
f = 1kHz
f = 10kHz
OPA4277
V+ Out B –In B +In B
Out A 1
–In A 2 A
+In A 3
V+ 4
+In B 5 B
–In B 6
Out B 7
14 Out D
13 –In D D
12 +In D
11 V–
10 +In C C
9 –In C
8 Out C
8-Pin DIP, SO-8
14-Pin DIP, SO-14
OPA277 op amps are easy to use and free from phase inversion and overload problems found in some other op amps. They are stable in unity gain and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.
Single (OPA277) and dual (OPA2277) versions are available in 8-pin DIP and SO-8 surface-mount packages. The quad (OPA4277) comes in 14-pin DIP and SO-14 surface-mount packages. All are fully specified from –40°C to +85°C and operate from –55°C to +125°C.