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LTC2054/LTC2055

20545fc

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Single/Dual Micropower

Zero-Drift Operational Ampliﬁ ers

The LTC

2054/LTC2055 are low power, low noise, single/

dual, zero-drift operational ampliﬁ ers with an extended

temperature version (LTC2054MP) that has guaranteed

speciﬁ cations from –55°C to 150°C. They are available

in TSOT-23 (ThinSOT™) and MS8 packages. For space

limited applications, the LTC2055 is also available in a

3mm × 3mm × 0.8mm dual ﬁ ne pitch leadless package

(DFN). They operate from a single 2.7V minimum supply

and support ±5V applications. The current consumption

is typically 150µA for the LTC2054 and 130µA/amp for

the LTC2055.

The LTC2054/LTC2055, despite their miniature size, feature

uncompromising DC performance. The maximum input

offset voltage and offset drift are 3.0µV and 30nV/°C over

the –40°C to 85°C industrial temperature range. The almost

zero DC offset and drift are supported with a power supply

rejection ratio (PSRR) and common mode rejection ratio

(CMRR) of 130dB (typ).

The input common mode voltage ranges from the negative

supply up to typically 0.5V below the positive supply. The

open-loop gain is typically 140dB. The LTC2054/LTC2055

also feature a 1.6µV

P-P

DC to 10Hz noise and a 500kHz

gain-bandwidth product.

–48V Low Side Precision Current Sense

Supply Current 150μA (Max per Ampliﬁ er)

Guaranteed from –40°C to 85°C

Offset Voltage 3μV (Max,

–

40°C to 85°C)

Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C)

Guaranteed Speciﬁ cations from –55°C to 150°C

(LTC2054MP)

Common Mode Input Range from V

–

to V

– 0.5V

Output Swings Rail-to-Rail

Voltage Gain: 140dB (Typ)

PSRR and CMRR: 130dB (Typ)

Input Bias Current: 1pA (Typ, 25°C)

Noise: 1.6µV

P-P

(0.01Hz to 10Hz Typ)

Supply Operation:

2.7V to 6V (LTC2054/LTC2055)

2.7V to ±5.5V (LTC2054HV/LTC2055HV)

Low Proﬁ le (1mm) TSOT-23, MS8 and

3mm × 3mm × 0.8mm DFN Packages

Thermocouple Ampliﬁ ers

Electronic Scales

Medical Instrumentation

Strain Gauge Ampliﬁ ers

High Resolution Data Acquisition

DC Accurate RC Active Filters

Low Side Current Sense

Battery-Powered Systems

vs Temperature

TEMPERATURE (°C)

(µV)

20545 TA01b

–2

–4

–6

–8

–10

–55

155

15 50

120

–20

= ±5V

–

0.01μF

0.1μF

0.003Ω

1% 3W

39k

BZX84C5V1

= 5.1

–48V SUPPLY

SENSE

–

100Ω

LTC2054

20545 TA01

–

10k

OUT

= 100V

SENSE

LTC2054

–48V LOAD

ZETEX

ZVN3320F

100Ω

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.

Summary of content (16 pages)

PAGE 1
LTC2054/LTC2055 Single/Dual Micropower Zero-Drift Operational Amplifiers DESCRIPTION FEATURES n n n n n n n n n n n n Supply Current 150μA (Max per Ampliﬁer) Guaranteed from –40°C to 85°C Offset Voltage 3μV (Max, –40°C to 85°C) Offset Voltage Drift 30nV/°C (Max, –40°C to 85°C) Guaranteed Speciﬁcations from –55°C to 150°C (LTC2054MP) Common Mode Input Range from V – to V + – 0.5V Output Swings Rail-to-Rail Voltage Gain: 140dB (Typ) PSRR and CMRR: 130dB (Typ) Input Bias Current: 1pA (Typ, 25°C) Noise: 1.
PAGE 2
LTC2054/LTC2055 ABSOLUTE MAXIMUM RATINGS (Note 1) Total Supply Voltage (V + to V –) LTC2054/LTC2055 ...................................................7V LTC2054HV/LTC2055HV........................................12V Input Voltage .......................(V + + 0.3V) to (V S– – 0.3V) Input Current........................................................±10mA Output Short-Circuit Duration ......................... Indeﬁnite Speciﬁed Temperature Range (Note 2) LTC2054C/LTC2055C ..............................
PAGE 3
LTC2054/LTC2055 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE LTC2055HVIMS8#PBF LTC2055HVIMS8#TRPBF LTBCT 8-Lead Plastic MSOP –40°C to 85°C LTC2055HMS8#PBF LTC2055HMS8#TRPBF LTBCR 8-Lead Plastic MSOP –40°C to 125°C LTC2055HVHMS8#PBF LTC2055HVHMS8#TRPBF LTBCT 8-Lead Plastic MSOP –40°C to 125°C LTC2054MPS5#PBF LTC2054MPS5#TRPBF LTFFF 5-Lead Plastic TSOT-23 –55°C to 150°C LTC2054HVMPS5#PBF LTC2054HVMPS5#TRPBF LTFFG 5-Le
PAGE 4
LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054/LTC2055) The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. VS = 3V, 5V unless otherwise noted.
PAGE 5
LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054MP) The l denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. VS = 3V, 5V unless otherwise noted.
PAGE 6
LTC2054/LTC2055 ELECTRICAL CHARACTERISTICS (LTC2054HVMP) The ● denotes the speciﬁcations which apply over the full operating temperature range, otherwise speciﬁcations are at TA = 25°C. VS = ±5V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN IS Supply Current No Load ● VOS Input Offset Voltage (Note 3) ● ΔVOS /ΔT Average Input Offset Drift (Note 3) ● IB Input Bias Current 175 0.
PAGE 7
LTC2054/LTC2055 TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio vs Frequency DC CMRR vs Common Mode Input Range 140 PSRR vs Frequency 140 140 VS = 3V OR 5V VCM = 0.5VP-P 120 VS = ±2.5V 120 120 100 100 80 60 40 80 80 PSRR (dB) CMRR (dB) CMRR (dB) 100 VS = 5V VS = 3V 60 60 –PSRR 40 20 40 +PSRR 0 20 20 0 0 10 100 1k FREQUENCY (Hz) 10k 100k –40 0 2 1 3 OUTPUT SWING (V) 0 VS = ±1.5V –2 VS = ±2.5V –3 –4 0 2 4 LOAD RESISTANCE (kΩ) V – + 1.5 V – + 1.
PAGE 8
LTC2054/LTC2055 TYPICAL PERFORMANCE CHARACTERISTICS Input Bias Current vs Input Common Mode Voltage VOS vs Temperature 7 10000 VS = ±5V 6 TA = 155°C 4 3 2 1 1 TA = 125°C BIAS CURRENT (pA) VOS (μV) VSUPPLY = ±2.5V 1000 5 Transient Response OUTPUT (V) 8 100 10 TA = 85°C TA = 70°C 0 0 –1 1 TA = –55°C –1 –2 –55 –20 85 50 15 TEMPERATURE (°C) 120 TA = 25°C TA = –40°C 0.1 –2.5 –2 –1.5 –1 –0.5 0 0.5 1 1.
PAGE 9
LTC2054/LTC2055 TEST CIRCUITS Electrical Characteristics Test Circuit 100k OUTPUT V+ 10Ω – LTC2054/55 + RL V– 20545 TC01 DC-10Hz Noise Test Circuit 100k 10Ω – 475k 0.01μF 158k 316k 475k – LTC2054/55 + 0.1μF 0.01μF LT1012 TO X-Y RECORDER + FOR 1Hz NOISE BW INCREASE ALL THE CAPACITORS BY A FACTOR OF 10.
PAGE 10
LTC2054/LTC2055 APPLICATIONS INFORMATION Clock Feedthrough, Input Bias Current The LTC2054 and LTC2055 use auto-zeroing circuitry to achieve an almost zero DC offset over temperature, common mode voltage, and power supply voltage. The frequency of the clock used for auto-zeroing is typically 1.0kHz. The term “clock feedthrough” is broadly used to indicate visibility of this clock frequency in the op amp output spectrum.
PAGE 11
LTC2054/LTC2055 APPLICATIONS INFORMATION Voltage Follower with Input Exceeding the Common Mode Range cause the second form of clock feedthrough described above, when averaged, dominate the DC input bias current of the op amp below 70°C. 2.5V At temperatures above 70°C, the leakage of the ESD protection diodes on the inputs increases the input bias currents of both inputs in the positive direction, while the current caused by the charge injection stays relatively constant.
PAGE 12
LTC2054/LTC2055 TYPICAL APPLICATIONS Ground Referred Precision Current Sources LT1634-1.25 10k 4 5 – 1 LTC2054 3 + VOUT – 1.25V IOUT = ——— RSET 0 ≤ IOUT ≤ 100μA (V–) + 1.5V ≤ VOUT ≤ –1V V+ + 3 2 RSET RSET 5 + 1 LTC2054 10k 4 – 2 1.25V IOUT = ——— RSET + V– VOUT – 0 ≤ IOUT ≤ 100μA 0.2V ≤ VOUT ≤ (V+) – 1.5V LT1634-1.
PAGE 13
LTC2054/LTC2055 PACKAGE DESCRIPTION DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698 Rev C) 0.70 p0.05 3.5 p0.05 1.65 p0.05 2.10 p0.05 (2 SIDES) PACKAGE OUTLINE 0.25 p 0.05 0.50 BSC 2.38 p0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED 3.00 p0.10 (4 SIDES) R = 0.125 TYP 5 0.40 p 0.10 8 1.65 p 0.10 (2 SIDES) PIN 1 TOP MARK (NOTE 6) (DD8) DFN 0509 REV C 0.200 REF 0.75 p0.05 4 0.25 p 0.05 1 0.50 BSC 2.38 p0.10 0.00 – 0.
PAGE 14
LTC2054/LTC2055 PACKAGE DESCRIPTION MS8 Package 8-Lead Plastic MSOP (Reference LTC DWG # 05-08-1660 Rev F) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.65 (.0256) BSC 0.42 ± 0.038 (.0165 ± .0015) TYP 8 7 6 5 0.52 (.0205) REF RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 1 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 2 3 4 1.10 (.043) MAX 0.
PAGE 15
LTC2054/LTC2055 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 16
LTC2054/LTC2055 TYPICAL APPLICATIONS Low Power, Bidirectional 60V Precision Hi Side Current Sense POSITIVE SENSE 10mΩ 5 3 BAT54 1 + – VSENSE LTC1754-5 1N4686 3.9VZ 2 10μF 4 100Ω 0.1μF 6 1μF 10μF 100Ω 3 PRECISION BIDIRECTIONAL GAIN OF 125 5 + 1 LTC2054 4 0.1μF – 2 12.4k 33Ω 2 2N5401 ON 5V OFF 0V MPSA42 POWER SUPPLY (NOTE: POSITIVE CURRENT SENSE INCLUDES CIRCUIT SUPPLY CURRENT) 35.