Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Op-amp Voltage feedback SOIC 8

4 5

N/C

-IN

+IN

OUTPUT

N/C

OUTPUT

+IN

-IN

OUTPUT

+IN

-IN

LMH6645, LMH6646, LMH6647

www.ti.com

SNOS970C –JUNE 2001–REVISED APRIL 2013

LMH6645/46/47 2.7V, 650μA, 55MHz, Rail-to-Rail Input and Output Amplifiers with

Shutdown Option

Check for Samples: LMH6645, LMH6646, LMH6647

FEATURES

DESCRIPTION

The LMH™6645 (single) and LMH6646 (dual), rail-to-

= 2.7V, T

= 25°C, R

= 1kΩ to V

/2, A

rail input and output voltage feedback amplifiers, offer

+1. Typical values unless specified).

high speed (55MHz), and low voltage operation

• −3dB BW 55MHz

(2.7V) in addition to micro-power shutdown capability

• Supply Voltage Range 2.5V to 12V

(LMH6647, single).

• Slew Rate 22V/μs

Input common mode voltage range exceeds either

supply by 0.3V, enhancing ease of use in multitude of

• Supply Current 650μA/channel

applications where previously only inferior devices

• Output Short Circuit Current 42mA

could be used. Output voltage range extends to

• Linear Output Current ±20mA

within 20mV of either supply rails, allowing wide

• Input Common Mode Voltage 0.3V Beyond

dynamic range especially in low voltage applications.

Even with low supply current of 650μA/amplifier,

Rails

output current capability is kept at a respectable

• Output Voltage Swing 20mV from Rails

±20mA for driving heavier loads. Important device

• Input Voltage Noise 17nV/√Hz

parameters such as BW, Slew Rate and output

• Input Current Noise 0.75pA/√Hz

current are kept relatively independent of the

operating supply voltage by a combination of process

enhancements and design architecture.

APPLICATIONS

In portable applications, the LMH6647 provides

• Active filters

shutdown capability while keeping the turn-off current

• High speed portable devices

to less than 50μA. Both turn-on and turn-off

• Multiplexing applications (LMH6647)

characteristics are well behaved with minimal output

fluctuations during transitions. This allows the part to

• Current sense buffer

be used in power saving mode, as well as

• High speed transducer amp

multiplexing applications. Miniature packages (SOT-

23, VSSOP-8, and SOIC-8) are further means to

ease the adoption of these low power high speed

devices in applications where board area is at a

premium.

Connection Diagram

Figure 1. SOT-23-5 (LMH6645) Figure 2. SOT-23-6 (LMH6647) Figure 3. SOIC-8 (LMH6645)

Package Number DBV0005A Package Number DBV0006A Package Number D0008A

Top View Top View Top View

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2LMH is a trademark of Texas Instruments.

3All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (28 pages)

PAGE 1
LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 LMH6645/46/47 2.7V, 650μA, 55MHz, Rail-to-Rail Input and Output Amplifiers with Shutdown Option Check for Samples: LMH6645, LMH6646, LMH6647 FEATURES DESCRIPTION 1 (VS = 2.7V, TA = 25°C, RL = 1kΩ to V+/2, AV = +1. Typical values unless specified). The LMH™6645 (single) and LMH6646 (dual), rail-torail input and output voltage feedback amplifiers, offer high speed (55MHz), and low voltage operation (2.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 N/C 1 www.ti.com 8 1 SD 8 + V OUT A A -IN 2 7 - + V 2 - + 7 -IN A +IN 3 6 + OUT B OUTPUT 3 6 +IN A - 4 5 V N/C + V Figure 4. SOIC-8 (LMH6647) Package Number D0008A Top View - -IN B B 4 5 +IN B Figure 5. SOIC-8 and VSSOP-8 (LMH6646) Package Numbers D0008A and DGK0008A Top View These devices have limited built-in ESD protection.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 2.7V Electrical Characteristics Unless otherwise specified, all limits guaranteed for at TJ = 25°C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol Parameter Conditions Min Typ 40 55 (1) (2) BW −3dB BW AV = +1, VOUT = 200mVPP, VCM = 0.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com 2.7V Electrical Characteristics (continued) Unless otherwise specified, all limits guaranteed for at TJ = 25°C, V+ = 2.7V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 5V Electrical Characteristics (continued) Unless otherwise specified, all limits guaranteed for at TJ = 25°C, V+ = 5V, V− = 0V, VCM = VO = V+/2, and Rf = 2kΩ, and RL = 1kΩ to V+/2. Boldface limits apply at the temperature extremes. Symbol CMVR CMRR Parameter Conditions Min (1) CMRR ≥ 50dB Input Common-Mode Voltage Range Common Mode Rejection Ratio Typ Max −0.5 −0.3 −0.1 (2) 5.3 5.1 5.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com ±5V Electrical Characteristics (continued) Unless otherwise specified, all limits guaranteed for at TJ = 25°C, V+ = 5V, V− = −5V, VCM = VO = 0V, Rf = 2kΩ, and RL = 1kΩ to GND. Boldface limits apply at the temperature extremes. Symbol IB Parameter Conditions Input Bias Current VCM = 4.8V Min (1) Typ Max +0.40 +2 +2.2 −0.65 −2 −2.2 3 500 (2) (4) VCM = −4.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 Typical Performance Characteristics At TJ = 25°C. Unless otherwise specified. Closed Loop Frequency Response for Various Temperature GAIN Frequency Response for Various AV AV = +1 0 25°C 50 AV = +1 GAIN (dB) 0 PHASE PHASE (°) -4 0 PHASE 50 100 100 -40°C VS = ±2.5V AV = +5 VS = ±5V RL = 1K RL = 1k: VOUT = 200mVPP 100k AV = +10 -4 1M 1M 10M FREQUENCY (Hz) 100k 100M 200M 10M FREQUENCY (Hz) Figure 6.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. Settling Time vs. Step Size Noise vs. Frequency 250 10.00 1000 ±0.1% 100 VS = ±2.5V Hz) CURRENT 1.00 100 in (pA/ 150 en (nV/ Hz) SETTLING TIME (ns) 200 RL = 500: 50 VOLTAGE CL = 13pF ±1% AV = -1 0 0 1 2 3 10 10 4 100 STEP AMPLITUDE (VPP) 10 FREQUENCY (Hz) Figure 12. Figure 13. VOUT from V+ vs.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. Output Swing from V− vs. RL (tied to VS/2) Output Swing from V+ vs. RL (tied to VS/2) 10k T = 25°C AV = +1 AV = +1 VOUT FROM V (mV) T = 85°C 1k 1k - + VOUT FROM V (mV) 10k 10V 5V 100 10V 5V 100 2.7V 2.7V 10 10 0 1.5k 1k 500 2k 500 0 2.5k 1k Figure 18. Output Swing from V− vs. RL (tied to VS/2) 2.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. PSRR vs. Frequency CMRR vs. Frequency 110 90 +PSRR 100 VS = ±2.5V 90 VS = 5V RF = 10k: 80 RG = 1k: 70 CMRR (dB) PSRR (dB) 80 70 -PSRR 60 50 60 50 40 40 30 30 20 20 10 100 10k 1M 100k FREQUENCY (Hz) 1k 10 1k 10M 100k 10k Figure 24. Figure 25. Crosstalk Rejection vs.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. VOS vs. VOUT (A Typical Unit) VOS vs. VCM (A Typical Unit) 0.6 0.4 VS = 2.7V 0.3 40°C 0.5 -40°C 0.2 25°C 0.1 VOS (mV) VOS (mV) 0.4 25°C 0 85° C -0.1 0. 3 0.2 85°C -0.2 -0.3 0.4 2 0.1 VS = 10V RL = 1k: to VS/2 0 4 2 6 8 10 0 -0.5 12 0.5 1.5 1 VCM (V) Figure 30. Figure 31. VOS vs. VCM (A Typical Unit) 2 2.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. IB vs. VS -0.50 -0.52 VCM = 0.2V 85°C 0.9 -0.54 IS (mA) (per channel) IB (µA) VS = ±5V 85°C 0.85 -0.56 -0.58 25°C -0.60 -0.62 -0.64 -0.66 0.8 0.75 25°C 0.7 0.65 0.6 0.55 -40°C -0.68 -0.7 IS vs. VCM 0.95 -40°C 0.5 1 3 2 4 6 5 7 0.45 9 10 11 12 8 -7 -5 VS (V) IS (mA) IS (mA) (per channel) 0.7 0.45 0.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 Typical Performance Characteristics (continued) At TJ = 25°C. Unless otherwise specified. Shutdown Pin and Supply Current vs. Shutdown Voltage 1000 Small Signal Step Response -100 85°C -40°C IVCC (µA) 100 -10 IVCC 1 0 SHUTDOWN PIN CURRENT -1 85°C ISHUTDOWN PIN (P$) 25°C VS = ±5V RL = 1k: AV = +1 -40°C VS = ±2.5V 1 1.5 -3.5 -2.5 -1.5 -0.5 0.5 VSHUTDOWN (V) VOUT = 0.2VPP 25°C 2.5 -0.1 3.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com APPLICATION NOTES CIRCUIT DESCRIPTION The LMH6645/6646/6647 family is based on proprietary VIP10 dielectrically isolated bipolar process. This device family architecture features the following: • Complimentary bipolar devices with exceptionally high ft (∼8GHz) even under low supply voltage (2.7V) and low Collector bias current. • Rail-to-Rail input which allows the input common mode voltage to go beyond either rail by about 0.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 As can be seen, the output does not exhibit any phase reversal as some op amps do. However, if the input voltage range is exceeded by more than a diode drop beyond either rail, the internal ESD protection diodes will start to conduct. The current flow in these ESD diodes should be externally limited.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com Figure 50 shows the output waveform. VOUT VS = 5V AV = +1 VIN = 3.5VPP SD 2.00 µs/DIV 2 V/DIV Figure 50. Output Held Low by Active Pull-Down Circuit If bipolar transistor power dissipation is not tolerable, the switch could be by a N-channel enhancement mode MOSFET. 2.7V SINGLE SUPPLY RRIO 2:1 MUX The schematic show in Figure 51 will function as a 2:1 MUX operating on a single 2.
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LMH6645, LMH6646, LMH6647 www.ti.com SNOS970C – JUNE 2001 – REVISED APRIL 2013 VOUT SELECT 1 V/DIV 1 µs/DIV Figure 52. 2:1 MUX Output As can be seen in Figure 52, the output is well behaved and there are no spikes or glitches due to the switching. Switching times are approximately around 500ns based on the time when the output is considered “valid”.
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LMH6645, LMH6646, LMH6647 SNOS970C – JUNE 2001 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision B (April 2013) to Revision C • 18 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 1-Nov-2013 (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LMH6645MAX/NOPB SOIC D 8 2500 330.0 12.4 6.5 5.4 2.0 8.0 12.0 Q1 LMH6645MF SOT-23 DBV 5 1000 178.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3 LMH6645MFX SOT-23 DBV 5 3000 178.0 8.4 3.2 3.2 1.4 4.0 8.
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PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LMH6645MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMH6645MF SOT-23 DBV 5 1000 210.0 185.0 35.0 LMH6645MFX SOT-23 DBV 5 3000 210.0 185.0 35.0 LMH6646MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMH6647MAX/NOPB SOIC D 8 2500 367.0 367.0 35.0 LMH6647MF SOT-23 DBV 6 1000 210.0 185.0 35.
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