|
|
Part: LT1990AIS8
Category:
Power Management
-> DC-DC Converters
Description: 250V Input Range G = 1, 10, Micropower, Difference Amplifier<<<>>>the LT 1990 is a Micropower Precision Difference Amplifier With a Very High Common Mode Input Voltage Range. It Has Pin Selectable Gains of 1 or 10. The LT1990 Operates Over a 250V Common Mode Voltage Range on a 15V Supply.<<<>>>features<<<>>><<<>>>pin Selectable Gain of 1 or 10 <<<>>>High Common Mode Voltage Range:<<<>>>85V Window (VS = 5V, 0V)<<<>>> 250V (VS = 15V) <<<>>>Common Mode Rejection Ratio: 70dB Min <<<>>>Input Protection to 350V <<<>>>Gain Error: 0.28% Max <<<>>>PSRR: 82dB Min <<<>>>High Input Impedance: 2M Ohm Differential, 500k Ohm Common Mode <<<>>>Micropower: 120µA Max Supply Current <<<>>>Wide Supply Range: 2.7V to 36V <<<>>> 3dB Bandwidth: 100kHz <<<>>>Rail-to-Rail Output <<<>>>8-Pin so Package
Company: Linear Technology Corporation
Datasheet: Download LT1990AIS8 datasheet File size : 283 kB
Request For quote: Find where to buy LT1990AIS8
Datasheet text preview:
LT1990 ±250V Input Range G = 1, 10, Micropower, Difference Amplifier DESCRIPTIO
The LT®1990 is a micropower precision difference amplifier with a very high common mode input voltage range. It has pin selectable gains of 1 or 10. The LT1990 operates over a ±250V common mode voltage range on a ±15V supply. The inputs are fault protected from common mode voltage transients up to ±350V and differential voltages up to ±500V. The LT1990 is ideally suited for both high side and low side current or voltage monitoring. On a single 5V supply, the LT1990 has an adjustable 85V input range, 70dB min CMRR and draws less than 120µA supply current. The rail-to-rail output maximizes the dynamic range, especially important for single supplies as low as 2.7V. The LT1990 is specified for single 3V, 5V and ±15V supplies over both commercial and industrial temperature ranges. The LT1990 is available in the 8-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
Pin Selectable Gain of 1 or 10 High Common Mode Voltage Range: 85V Window (VS = 5V, 0V) ±250V (VS = ±15V) Common Mode Rejection Ratio: 70dB Min Input Protection to ±350V Gain Error: 0.28% Max PSRR: 82dB Min High Input Impedance: 2M Differential, 500k Common Mode Micropower: 120µA Max Supply Current Wide Supply Range: 2.7V to 36V 3dB Bandwidth: 100kHz Rail-to-Rail Output 8-Pin SO Package
FEATURES
Battery Cell Voltage Monitoring High Voltage Current Sensing Signal Acquisition in Noisy Environments Input Protection Fault Protected Front Ends Level Sensing Isolation
TYPICAL APPLICATIO
+VSOURCE
Full-Bridge Load Current Monitor
5V LT1990 900k 7 2 1M 100k 10k 8
+
IL
RS 3 VREF = 1.5V 4 IN OUT LT6650 GND FB 54.9k 1nF 40k 40k 20k 1 1µF
1990 TA01
1M
12V VCM 73V VOUT = VREF ± (10 · IL · RS)
U
+
U
U
6
VOUT
10k 900k 100k
5
1990f
1
LT1990
ABSOLUTE
(Notes 1, 2)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
TOP VIEW REF 1 IN 2 + IN 3 V 4 8 7 6 5 GAIN1 V+ OUT GAIN2
Total Supply Voltage (V + to V ) ....... 36V Input Voltage Range Continuous ...... ±250V Transient (0.1s) ..... ±350V Differential ....... ±500V 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 Lead Temperature (Soldering, 10 sec.)........ 300°C
LT1990CS8 LT1990IS8 LT1990ACS8 LT1990AIS8 S8 PART MARKING 1990 1990A 1990I 1990AI
S8 PACKAGE 8-LEAD PLASTIC SO TJMAX = 150°C, JA = 190°C/W
3V/5V ELECTRICAL CHARACTERISTICS
VS = 3V, 0V; VS = 5V, 0V; RL = 10k, VCM = VREF = half supply, G = 1, 10, TA = 25°C, unless otherwise noted. (Note 6)
SYMBOL G G PARAMETER Gain Gain Error CONDITIONS Pins 5 and 8 = Open Pins 5 and 8 = GND VOUT = 0.5V to (+Vs) 0.75V LT1990, G = 1 LT1990A, G = 1 G = 10, VS = 5V, 0V VS = 5V, 0V; VOUT = 0.5V to 4.25V G=1 G = 10 Guaranteed by CMRR VS = 3V, 0V; VREF = 1.25V VS = 5V, 0V; VREF = 1.25V VS = 5V, 0V; VREF = 2.5V VS = 3V, 0V (Note 7) VCM = 5V to 25V, VREF = 1.25V LT1990 LT1990A VS = 5V, 0V VCM = 5V to 80V, VREF = 1.25V LT1990 LT1990A VS = 5V, 0V (Note 7) VCM = 38V to 47V, VREF = 2.5V LT1990 LT1990A V OS en Offset Voltage, RTI Input Noise Voltage, RTI Noise Voltage Density, RTI G = 1, 10 fO = 0.1Hz to 10Hz fO = 1kHz 5 5 38 MIN TYP 1 10 0.4 0.07 0.2 0.001 0.01 0.6 0.28 0.8 0.005 % % % % % V V V MAX UNITS
GNL
Gain Nonlinearity
VCM
Input Voltage Range
25 80 47
CMRR
Common Mode Rejection Ratio RTI (Referred to Input)
60 70
68 75
60 70
68 75
60 70
68 75 0.8 22 1 3
µVP-P µV/Hz
1990f
2
U
dB dB dB dB dB dB mV
W
U
U
WW
W
LT1990
3V/5V ELECTRICAL CHARACTERISTICS
VS = 3V, 0V; VS = 5V, 0V; RL = 10k, VCM = VREF = half supply, G = 1, 10, TA = 25°C, unless otherwise noted. (Note 6)
SYMBOL RIN PSRR IS VOL VOH PARAMETER Input Resistance Power Supply Rejection Ratio, RTI Minimum Supply Voltage Supply Current Output Voltage Swing LOW Output Voltage Swing HIGH CONDITIONS Differential Common Mode VS = 2.7V to 12.7V, VCM = VREF = 1.25V Guaranteed by PSRR (Note 8) IN = V+, +IN = Half Supply (Note 8) IN = 0V, +IN = Half Supply VS = 3V, 0V, Below V+ VS = 5V, 0V, Below V+ Short to GND (Note 9) Short to V+ (Note 9) G=1 G = 10 G = 1, VS = 5V, 0V, VOUT = 0.5V to 4.5V 4V Step, G = 1, VS = 5V, 0V 4 13 80 MIN TYP 2 0.5 92 2.4 105 30 100 120 8 20 100 6.5 0.5 45 1 ± 0.0007 2.7 120 50 150 175 MAX UNITS M M dB V µA mV mV mV mA mA kHz kHz V/µs µs
I SC BW SR AVREF
Output Short-Circuit Current Bandwidth (3dB) Slew Rate Settling Time to 0.01% Reference Gain to Output
The denotes the specifications which apply over the temperature range of 0°C TA 70°C. VS = 3V, 0V; VS = 5V, 0V; RL = 10k, VCM = VREF = half supply, G = 1, 10, unless otherwise noted. (Notes 4, 6)
SYMBOL G PARAMETER Gain Error CONDITIONS VOUT = 0.5V to (+VS) 0.75V LT1990, G = 1 LT1990A, G = 1 G = 10 G = 1 (Note 10) G = 10 (Note 10) Guaranteed by CMRR VS = 3V, 0V, VREF = 1.25V VS = 5V, 0V, VREF = 1.25V VS = 5V, 0V, VREF = 2.5V VS = 3V, 0V (Note 7) VCM = 5V to 25V, VREF = 1.25V LT1990 LT1990A VS = 5V, 0V VCM = 5V to 80V, VREF = 1.25V LT1990 LT1990A VS = 5V, 0V (Note 7) VCM = 38V to 47V, VREF = 2.5V LT1990 LT1990A V OS Input Offset Voltage, RTI VS = 3V, 0V G = 1, 10 VS = 5V, 0V G = 1, 10
MIN
TYP
MAX 0.65 0.33 0.90
UNITS % % % ppm/°C ppm/°C V V V
G/T VCM
Gain vs Temperature Input Voltage Range
2 7 5 5 37
10 20 25 80 48
CMRR
Common Mode Rejection Ratio, RTI
58 68
dB dB
58 68
dB dB
58 68 4.1 4.1
dB dB mV mV
1990f
3
Others parts begin by lt
LT-1 LT-2 LT-3 LT-4 LT-5 LT-6 LT-7 LT-8 LT-9 LT-10 LT-11 LT-12 LT-13 LT-14 LT-15 LT-16 LT-17 LT-18 LT-19 LT-20 LT-21 LT-22 LT-23 LT-24 LT-25 LT-26 LT-27 LT-28 LT-29 LT-30 LT-31 LT-32 LT-33 LT-34 LT-35 LT-36 LT-37 LT-38 LT-39 LT-40 LT-41 LT-42 LT-43 LT-44 LT-45 LT-46 LT-47 LT-48 LT-49 LT-50 LT-51 LT-52 LT-53 LT-54 LT-55
|
|
|
