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Part: LT1995
Category:
Description: 30MHz, 1000V/�s Gain Selectable Amplifier
Company: Linear Technology Corporation
Datasheet: Download LT1995 datasheet File size : 283 kB
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LT1995 30MHz, 1000V/µs Gain Selectable Amplifier
FEATURES
DESCRIPTIO
Internal Gain Setting Resistors Pin Configurable as a Difference Amplifier, Inverting and Noninverting Amplifier Difference Amplifier: Gain Range 1 to 7 CMRR > 65dB Noninverting Amplifier: Gain Range 1 to 8 Inverting Amplifier: Gain Range 1 to 7 Gain Error: <0.2% Slew Rate: 1000V/µs Bandwidth: 30MHz (Gain = 1) Op Amp Input Offset Voltage: 2.5mV Max Quiescent Current: 9mA Max Wide Supply Range: ±2.5V to ±15V Available in the 10-Lead MSOP Package
The LT®1995 is a high speed, high slew rate, gain selectable amplifier with excellent DC performance. Gains from 7 to 8 with a gain accuracy of 0.2% can be achieved using no external components. The device is particularly well suited for use as a difference amplifier, where the excellent resistor matching results in a typical common mode rejection ratio of 70dB or more. The amplifier is a single gain stage design similar to the LT1363 and features superb slewing and settling characteristics. Input offset of the internal operational amplifier is less than 2.5mV and the slew rate is 1000V/µs. The output can drive a 150 load to ±2.5V on ±5V supplies, making it useful in cable driver applications. The resistors have excellent matching, 0.2% maximum at room temperature and 0.3% from 40°C to 85°C. The temperature coefficient of the resistors is less than 50ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of 10ppm. The LT1995 is fully specified at ±2.5V, ±5V and ±15V supplies and from 40°C to 85°C. The device is available in space saving 10-lead MSOP package. For a micropower precision amplifier with precision resistors, see the LT1991.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
Instrumentation Amplifier Current Sense Amplifier Video Difference Amplifier Automatic Test Equipment
TYPICAL APPLICATIO
M1 M2 M4 1k 2k
High Slew Rate Differential Gain of 1
15V 4k OUT
Large-Signal Transient (G = 1)
+
2k 1k
P1 P2 P4
+
INPUT RANGE 15V TO 15V
4k
4k
LT1995 4k
1995 TA01b
REF 15V
1995 TA01a
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LT1995
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
TOP VIEW P1 P2 P4 VS REF 1 2 3 4 5 10 9 8 7 6 M1 M2 M4 VS+ OUT
MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150°C, JA = 160°C/W (NOTE 6)
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grades are identified by a label on the shipping container.
ELECTRICAL CHARACTERISTICS
Difference Amplifier Configuration. TA = 25°C, VREF = VCM = 0V and unused gain pins are unconnected, unless otherwise noted.
SYMBOL PARAMETER GE Gain Error CONDITIONS VOUT = ±12V, RL = 1k, G = 1 VOUT = ±12V, RL = 1k, G = 2 VOUT = ±12V, RL = 1k, G = 4 VOUT = ±5V, RL = 150, G = 1 VOUT = ±2.5V, RL = 500, G = 1 VOUT = ±2.5V, RL = 150, G = 1 VOUT = ±12V, RL = 1k, G = 1 G=1 G=2 G=4 G=1 G=1 G = 1, f = 10kHz G = 2, f = 10kHz G = 4, f = 10kHz VSUPPLY ±15V ±15V ±15V ±15V ±5V ±5V ±15V ±15V ±15V ±15V ±5V ±2.5V ±2.5V to ±15V ±2.5V to ±15V ±2.5V to ±15V MIN TYP 0. 05 0. 05 0. 05 0.05 0.05 0.05 10 1 0.7 0.6 1 1 27 18 14 5 4 3.75 5 5 MAX 0.2 0.2 0.2 0.25 0.2 0.25 UNITS % % % % % % ppm mV mV mV mV mV nV/Hz nV/Hz nV/Hz
GNL VOS
Gain Nonlinearity Input Offset Voltage Referred to Input (Note 7)
en
Input Noise Voltage
2
+
Total Supply Voltage (V+ to V) ...... 36V Input Current (Note 2) ...... ±10mA Output Short-Circuit Duration (Note 3) .. Indefinite Operating Temperature Range (Note 4) .. 40°C to 85°C Specified Temperature Range (Note 5) ... 40°C to 85°C Storage Temperature Range ....... 65°C to 150°C Maximum Junction Temperature .. 150°C Lead Temperature (Soldering, 10 sec)......... 300°C
LT1995CMS LT1995IMS MS PART MARKING* LTBJD
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LT1995
ELECTRICAL CHARACTERISTICS
Difference Amplifier Configuration. TA = 25°C, VREF = VCM = 0V and unused gain pins are unconnected, unless otherwise noted.
SYMBOL PARAMETER RIN CIN Input Capacitance Input Voltage Range G=1 CONDITIONS VSUPPLY ±15V ±15V ±15V ±5V ±2.5V ±15V ±15V ±15V ±5V ±2.5V ±15V ±15V ±5V ±2.5V ±15V ±15V ±5V ±15V ±5V ±15V ±15V ±5V ±2.5V ±15V ±5V ±15V ±5V ±15V ±5V ±15V ±5V ±15V ±15V ±15V ±15V ±5V ±15 ±5 ±1 65 71 75 65 61 78 ±13.5 ±13 ±3.5 ±1.3 ±70 750 MIN TYP 4 2.5 ±15.5 ±5.5 ±1.5 79 84 87 73 68 87 ±14 ±13.5 ±4 ±2 ±120 1000 450 16 24 81 32 25 21 10 15 30 30 9 11 100 110 0.06 0.15 1.5 7.1 6.7 9.0 8.5 MAX UNITS k pF V V V dB dB dB dB dB dB V V V V mA V/µs V/µs MHz MHz dB MHz MHz MHz ns ns % % ns ns ns ns % Deg mA mA Common Mode Input Resistance VCM = ±15V, G = 1
CMRR
Common Mode Rejection Ratio Referred to Input
G = 1, VCM = ±15V G = 2, VCM = ±15V G = 4, VCM = ±15V G = 1, VCM = ±5V G = 1, VCM = ±1V P1 = M1 = 0V, G = 1, VS = ±2.5V to ±15V RL = 1k RL = 500 RL = 500 RL = 500 G=1 G = 2, VOUT = ±12V, P2 = 0V Measured at VOUT = ±10V G = 2, VOUT = ±3.5V, P2 = 0V Measured at VOUT = ±2V 10V Peak, G = 2 (Note 8) 3V Peak, G = 2 (Note 8) G = 1, f = 1MHz, RL = 1k, VOUT = 2VP-P G=1
PSRR VOUT
Power Supply Rejection Ratio Output Voltage Swing
I SC SR
Short-Circuit Current Slew Rate
FPBW HD
Full Power Bandwidth Total Harmonic Distortion 3dB Bandwidth
tr, tf OS t pd ts G ROUT IS
Rise Time, Fall Time Overshoot Propagation Delay Settling Time Differential Gain Differential Phase Output Resistance Supply Current
10% to 90%, 0.1V, G = 1 0.1V, G = 1, CL = 10pF 50% VIN to 50% VOUT, 0.1V, G = 1 10V Step, 0.1%, G = 1 5V Step, 0.1%, G = 1 G = 2, RL = 150 G = 2, RL = 150 f = 1MHz, G = 1 G=1
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