Datasheet

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LTC2050/LTC2050HV

2050fc

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Zero-Drift

Operational Ampliﬁ ers

in SOT-23

The LTC

2050 and LTC2050HV are zero-drift operational

ampliﬁ ers available in the 5- or 6-lead SOT-23 and SO-8

packages. The LTC2050 operates from a single 2.7V to

6V supply. The LTC2050HV operates on supplies from

2.7V to ±5.5V. The current consumption is 800μA and the

versions in the 6-lead SOT-23 and SO-8 packages offer

power shutdown (active low).

The LTC2050, despite its miniature size, features uncom-

promising DC performance. The typical input offset voltage

and offset drift are 0.5μV and 10nV/°C. The almost zero

DC offset and drift are supported with a power supply

rejection ratio (PSRR) and common mode rejection ratio

(CMRR) of more than 130dB.

The input common mode voltage ranges from the nega-

tive supply up to typically 1V from the positive supply.

The LTC2050 also has an enhanced output stage capable

of driving loads as low as 2kΩ to both supply rails. The

open-loop gain is typically 140dB. The LTC2050 also

features a 1.5μV

P-P

DC to 10Hz noise and a 3MHz gain

bandwidth product.

Maximum Offset Voltage of 3μV

Maximum Offset Voltage Drift of 30nV/°C

Noise: 1.5μV

P-P

(0.01Hz to 10Hz Typ)

Voltage Gain: 140dB (Typ)

PSRR: 130dB (Typ)

CMRR: 130dB (Typ)

Supply Current: 0.8mA (Typ)

Supply Operation: 2.7V to 6V (LTC2050)

2.7V to ±5.5V (LTC2050HV)

Extended Common Mode Input Range

Output Swings Rail-to-Rail

Input Overload Recovery Time: 2ms (Typ)

Operating Temperature Range: –40°C to 125°C

Low Proﬂ e (1mm) SOT-23 (ThinSOT)

™

Package

Thermocouple Ampliﬁ ers

Electronic Scales

Medical Instrumentation

Strain Gauge Ampliﬁ ers

High Resolution Data Acquisition

DC Accurate RC Active Filters

Low Side Current Sense

Input Referred Noise 0.1Hz to 10HzDifferential Bridge Ampliﬁ er

–

0.1μF

18.2k

0.1μF

18.2k

0.1μF

= 100

2050 TA01

350Ω

STRAIN

GAUGE

50Ω

GAIN

TRIM

LTC2050HV

–5V

–1

–2

(μV)

240

TIME (SEC)

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners. Protected by U.S. Patents, including

5481178.

Summary of content (16 pages)

PAGE 1
LTC2050/LTC2050HV Zero-Drift Operational Amplifiers in SOT-23 DESCRIPTION FEATURES n n n n n n n n n n n n n Maximum Offset Voltage of 3μV Maximum Offset Voltage Drift of 30nV/°C Noise: 1.5μVP-P (0.01Hz to 10Hz Typ) Voltage Gain: 140dB (Typ) PSRR: 130dB (Typ) CMRR: 130dB (Typ) Supply Current: 0.8mA (Typ) Supply Operation: 2.7V to 6V (LTC2050) 2.7V to ±5.
PAGE 2
LTC2050/LTC2050HV ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V + to V –) LTC2050..................................................................7V LTC2050HV ...........................................................12V Input Voltage ........................ (V + + 0.3V) to (V – – 0.3V) Output Short-Circuit Duration ......................... Indeﬁnite Operating Temperature Range................–40°C to 125°C Speciﬁed Temperature Range (Note 3)................................................
PAGE 3
LTC2050/LTC2050HV ORDER INFORMATION LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2050CS5 LTC2050CS5#TR LTAEG 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050IS5 LTC2050IS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050HS5 LTC2050HS5#TR LTAEG 5-Lead Plastic TSOT-23 –40°C to 125°C LTC2050HVCS5 LTC2050HVCS5#TR LTAEH 5-Lead Plastic TSOT-23 0°C to 70°C LTC2050HVIS5 LTC2050HVIS5#TR LTAEH 5-Lead Plastic TSOT-23 –40°C to 85°C LTC2050
PAGE 4
LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS (LTC2050/LTC2050HV) The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. VS = 3V unless otherwise noted. (Note 3) C, I SUFFIXES PARAMETER CONDITIONS Input Offset Voltage (Note 2) Average Input Offset Drift (Note 2) MIN ±0.5 l LTC2050 LTC2050 LTC2050HV Input Noise Voltage l l Common Mode Rejection Ratio Power Supply Rejection Ratio VS = 2.
PAGE 5
LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. (LTC2050/LTC2050HV) VS = 5V unless otherwise noted. (Note 3) C, I SUFFIXES PARAMETER CONDITIONS Input Offset Voltage (Note 2) Average Input Offset Drift (Note 2) MIN ±0.5 ±3 MIN LTC2050 LTC2050HV Input Noise Voltage RS = 100Ω, 0.01Hz to 10Hz Common Mode Rejection Ratio VCM = GND to (V + – 1.3) VCM = GND to (V + – 1.
PAGE 6
LTC2050/LTC2050HV ELECTRICAL CHARACTERISTICS (LTC2050HV) The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 3) C, I SUFFIXES PARAMETER CONDITIONS Input Offset Voltage (Note 2) Average Input Offset Drift (Note 2) MIN MAX ±0.5 ±3 l 50 Input Bias Current (Note 4) ±25 l RS = 100Ω, 0.01Hz to 10Hz Common Mode Rejection Ratio VCM = V – to (V + – 1.3) VCM = V – to (V + – 1.
PAGE 7
LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency DC CMRR vs Common Mode Input Voltage 140 VS = 3V OR 5V VCM = 0.5VP-P 120 120 120 100 60 80 60 40 20 20 0 0 10k 100 1k FREQUENCY (Hz) 100k TA = 25°C 2 1 3 0 5 4 VCM (V) 10 100 2050 G02 5 RL TO GND 4 5 2 3 VS = 5V OUTPUT SWING (V) OUTPUT VOLTAGE (V) VS = 3V 4 3 VS = 3V 2 1 1 0 0 0.
PAGE 8
LTC2050/LTC2050HV TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Input Common Mode Voltage (LTC2050HV) 160 60 140 50 INPUT BIAS CURRENT (pA) INPUT BIAS CURRENT MAGNITUDE (pA) Input Bias Current vs Input Common Mode Voltage 120 VS = 5V 100 80 60 VS = 3V 40 VS = ±5V 0.
PAGE 9
LTC2050/LTC2050HV TEST CIRCUITS Electrical Characteristics Test Circuit 100k OUTPUT V+ 10Ω 4 5 – LTC2050 3 + 1 2 RL V– 2050 TC01 DC-10Hz Noise Test Circuit 100k 10Ω 4 – 0.01μF LTC2050 3 475k + 1 158k 316k 475k – 0.1μF 0.01μF LT1012 TO X-Y RECORDER + FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
PAGE 10
LTC2050/LTC2050HV APPLICATIONS INFORMATION Shutdown The LTC2050 includes a shutdown pin in the 6-lead SOT-23 and the SO-8 version. When this active low pin is high or allowed to ﬂoat, the device operates normally. When the shutdown pin is pulled low, the device enters shutdown mode; supply current drops to 3μA, all clocking stops, and both inputs and output assume a high impedance state.
PAGE 11
LTC2050/LTC2050HV TYPICAL APPLICATIONS Single Supply Thermocouple Ampliﬁer 1k 1% 255k 1% 100Ω 0.068μF 5V 5V 2 4 LT1025A K GND R– 5 4 3 7 – + 5 – 1 LTC2050 + VOUT 10mV/°C 2 0.1μF TYPE K LT1025 COMPENSATES COLD JUNCTION OVER 0°C TO 100°C TEMPERATURE RANGE 2050 TA03 Gain of 1001 Single Supply Instrumentation Ampliﬁer 0.1μF 10Ω 10k V+ 10k 4 – LTC2050 –VIN 3 + V+ 5 1 10Ω – 5 LTC2050 2 +VIN OUTPUT DC OFFSET ≤ 6mV FOR 0.
PAGE 12
LTC2050/LTC2050HV TYPICAL APPLICATIONS Instrumentation Ampliﬁer with 100V Common Mode Input Voltage 1k 1M V+ 1M 4 + VIN – LTC2050HV 1M 3 – 1k + V+ 5 2 V– 1 1k 4 – 5 LTC2050HV 3 + 1 VOUT 2 V– OUTPUT OFFSET ≤3mV FOR 0.1% RESISTORS, CMRR = 54dB High Precision 3-Input Mux 1.
PAGE 13
LTC2050/LTC2050HV PACKAGE DESCRIPTION S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4.
PAGE 14
LTC2050/LTC2050HV PACKAGE DESCRIPTION S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 0.62 MAX 2.90 BSC (NOTE 4) 0.95 REF 1.22 REF 3.85 MAX 2.62 REF 1.4 MIN 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 – 0.45 6 PLCS (NOTE 3) 0.95 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 1.90 BSC S6 TSOT-23 0302 REV B NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3.
PAGE 15
LTC2050/LTC2050HV PACKAGE DESCRIPTION S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) .189 – .197 (4.801 – 5.004) NOTE 3 .045 ±.005 .050 BSC 8 .245 MIN 7 6 5 .160 ±.005 .150 – .157 (3.810 – 3.988) NOTE 3 .228 – .244 (5.791 – 6.197) .030 ±.005 TYP 1 RECOMMENDED SOLDER PAD LAYOUT .010 – .020 s 45° (0.254 – 0.508) .008 – .010 (0.203 – 0.254) 3 4 .053 – .069 (1.346 – 1.752) .004 – .010 (0.101 – 0.254) 0°– 8° TYP .016 – .050 (0.406 – 1.270) NOTE: 1.
PAGE 16
LTC2050/LTC2050HV TYPICAL APPLICATION Ground Referred Precision Current Sources LT1034 0 ≤ IOUT ≤ 4mA (V–) + 1.5V ≤ VOUT ≤ – 1V + VOUT – 1.235V IOUT = ——— RSET V+ 10k 4 5 – LTC2050 3 + 1 3 2 RSET 10k 1.235V IOUT = ——— RSET + LTC2050 4 RSET 5 + – 1 2 V– VOUT – 0 ≤ IOUT ≤ 4mA 0.2V ≤ VOUT ≤ (V+) – 1.