LOG104 Status: ACTIVE

Logarithmic Amplifier

Alert me about changes<br/>to this product

Alert me about changes
to this product

Datasheet

Precision Logarithmic and Log Ratio Amplifier (Rev. C) (PDF 451 KB) 3401 views
04 Apr 2005

	LOG104
Scale Factor(V/decade)	0.5
Input Current Range(Min)(nA)	100
Input Current Range(Max)(mA)	3.5
Conformity Error (initial 5 decades)(Max)(%)	0.2
Conformity Error (initial 5 decades) (typ. over temp)(%/degree C)	0.0001
Offset Voltage (Input Amplifiers)(Max)(mV)	1.5
Vs (+/-)(Min)(V)	4.5
Vs (+/-)(Max)(V)	18
Iq(Max)(mA)	1.5
Reference Type	External
Full-Scale Output Voltage(Min)(+/- V)	1.2
Full-Scale Output Voltage(Max)(+/- V)	1.5
Operating Temp Range(Celsius)	-40 to 85
Pin/Package	8SOIC
Rating	Catalog
	Samples
	Inventory

Customers Who Evaluated This Product Also Evaluated

LOG102: Logarithmic and Log Ratio Amplifier
LOG101: Logarithmic Amplifier
LOG112: Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference
TL441: Logarithmic Amplifier
ADS8364: 16-Bit 250 kSPS 6 ADCs, Parallel Out, W/6 x FIFO W/6 Ch.
INA128: Precision, Low Power Instrumentation Amplifiers

More Related Products

Product Information

Features

EASY-TO-USE COMPLETE CORE FUNCTION
HIGH ACCURACY: 0.01% FSO Over 5 Decades
WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA
LOW QUIESCENT CURRENT: 1mA
WIDE SUPPLY RANGE: ±4.5V to ±18V
APPLICATIONS
- LOG, LOG RATIO, ANTI-LOG COMPUTATION:
  Communication, Analytical, Medical, Industrial, Test, General Instrumentation
- PHOTODIODE SIGNAL COMPRESSION AMP
- ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL(A/D)CONVERTER

Note: Protected under US Patent #6,667,650; other patents pending.
All trademarks are the property of their respective owners.

Description

The LOG104 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current.

The LOG104 is tested over a wide dynamic range of input signals. In log ratio applications, a signal current can come from a photodiode, and a reference current from a resistor in series with a precision external reference.

The output signal at V_OUT is trimmed to 0.5V per decade of input current, allowing seven decades of input current, dynamic range.

Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over a wide environmental temperature range. The LOG104 is specified over the temperature range –5°C to +75°C, with operation over –40°C to +85°C.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
LOG104AID	ACTIVE	-40 to 85	7.65 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
LOG104AIDE4	ACTIVE	-40 to 85	7.65 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Contact TI Distributor or Sales Office
LOG104AIDG4	ACTIVE	-40 to 85	7.65 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE	Contact TI Distributor or Sales Office
LOG104AIDR	ACTIVE	-40 to 85	6.95 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
LOG104AIDRE4	ACTIVE	-40 to 85	6.95 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status	Reported Distributor Inventory
LOG104AID	As of 11:22 AM GMT, 03 Jul 2009	As of 11:22 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	8 Weeks	Americas	Avnet	72
			DigiKey	6
			Newark	63
			Rochester Electronics	>1k
LOG104AIDE4	As of 11:22 AM GMT, 03 Jul 2009	As of 11:22 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	8 Weeks	Americas	DigiKey	Available
LOG104AIDG4	As of 11:22 AM GMT, 03 Jul 2009	As of 11:22 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	8 Weeks	Americas	DigiKey	Available
LOG104AIDR	As of 11:22 AM GMT, 03 Jul 2009	As of 11:22 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	6 Weeks	Americas	DigiKey	Available
	6 Weeks	Americas	Rochester Electronics	>1k
LOG104AIDRE4	As of 11:22 AM GMT, 03 Jul 2009	As of 11:22 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	6 Weeks	Americas	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
LOG104AID	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
LOG104AIDE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
LOG104AIDG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
LOG104AIDR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View
LOG104AIDRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-3-260C-168 HR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for LOG104

Datasheet

Precision Logarithmic and Log Ratio Amplifier (Rev. C) (PDF 451 KB) 3401 views
04 Apr 2005

Simulation Models

PSpice Model
- LOG104 PSpice Macro Model and Test Circuit (ZIP 4 KB) 227 views
  28 Jun 2004
TINA-TI Spice Model
- LOG104 TINA-TI Spice Model (TSM 5 KB) 31 views
  16 Jan 2009
TINA-TI Reference Design
- LOG104 TINA-TI Reference Design (Rev. A) (TSC 136 KB) 148 views
  16 Jan 2009

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
LOG102	Logarithmic and Log Ratio Amplifier		TI customers also evaluated this product.
LOG101	Logarithmic Amplifier		TI customers also evaluated this product.
LOG112	Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference		TI customers also evaluated this product.
LOG114	Precision High-Speed Logarithmic Amplifier with 2.5V Reference and Uncommitted Output Op Amps		TI customers also evaluated this product.
LOG2112	Precision Logarithmic and Log Ratio Amplifier with On-Chip 2.5V Voltage Reference		TI customers also evaluated this product.
TL441	Logarithmic Amplifier	AMPLIFIERS (SL)-LOGARITHMIC AMPLIFIERS (SL)	TI customers also evaluated this product.
ADS8364	16-Bit 250 kSPS 6 ADCs, Parallel Out, W/6 x FIFO W/6 Ch.	DATA CONVERTERS-ANALOG TO DIGITAL CONVERTERS	TI customers also evaluated this product.
INA128	Precision, Low Power Instrumentation Amplifiers	INSTRUMENTATION AMPLIFIERS-DUAL SUPPLY	TI customers also evaluated this product.
TPS65021	6-channel Power Mgmt IC with 3DC/DCs, 3 LDOs, I2C interface and Dynamic Voltage Scaling	POWER MANAGEMENT MULTI-CHANNEL IC (PMIC) SOLUTIONS-PMIC SOLUTIONS WITH AND WITHOUT BATTERY CHARGER	TI customers also evaluated this product.
DAC8534	2.7V to 5.5V, Quad Channel, 16-Bit, Serial Input DAC	DATA CONVERTERS-DIGITAL TO ANALOG CONVERTERS	TI customers also evaluated this product.
CDCM7005	High Performance, Low Phase Noise, Low Skew Clock Synchronizer that Synchronizes Ref Clock to VCXO	ULTRA LOW JITTER SYNTHESIZER AND JITTER CLEANER-EXTERNAL VCXO OUTPUT	TI customers also evaluated this product.
PCM2904	Stereo USB1.1 CODEC with line-out, Bus-powered (HID Interface + 500mA USB Current)	AUDIO-USB AUDIO	TI customers also evaluated this product.
TPS75533	Single Output LDO, 5.0A, Fixed(3.3V), Low Quiescent Current, Fast Transient Response	LINEAR REGULATORS-SINGLE CHANNEL LDO	TI customers also evaluated this product.
DAC8831	16-Bit, Ultra-Low Power, Voltage Output Digital to Analog Converter	DATA CONVERTERS-DIGITAL TO ANALOG CONVERTERS	TI customers also evaluated this product.
TMS320F2812	32-Bit Digital Signal Controller with Flash	C2000™ 32-BIT MICROCONTROLLERS-F282X FIXED POINT MCU	TI customers also evaluated this product.

Support and Community

Customer Tags

No Tags are Available for this Part Number

LOG104 Status: ACTIVE

Logarithmic Amplifier

Most Popular Links

Datasheet

Customers Who Evaluated This Product Also Evaluated

Product Information

Features

Description

Pricing / Packaging / CAD Design Tools / Samples

Inventory

Quality & Lead (Pb)-Free Data

Technical Documents

Datasheet

Simulation Models

Support and Community

Customer Tags

Other Support