- 您现在的位置：买卖IC网 > PDF目录95793 > LSP2961 (LSI CORP) LOG OR ANTILOG AMPLIFIER, 0.1 MHz BAND WIDTH, PDSO8 PDF资料下载
参数资料
| 型号： | LSP2961 |
| 厂商： | LSI CORP |
| 元件分类： | 模拟运算功能 |
| 英文描述： | LOG OR ANTILOG AMPLIFIER, 0.1 MHz BAND WIDTH, PDSO8 |
| 封装： | 3 X 3 MM, TSSOP-8 |
| 文件页数： | 1/6页 |
| 文件大小： | 145K |
| 代理商： | LSP2961 |
Advance Data Sheet
September 2001
LSP2961
Precision Log Ratio Amplifier
Features
I
Seven decades (1 nA to 10 mA) typical input range
I
Internal scale factor K = 1 ± 2% (K externally
adjustable):
(eq. 1)
I
Internal trimmed reference current
(IREF = 1 A ± 5%, externally adjustable)
I
Maximum ±100 mV output offset (externally
adjustable)
I
Minimal external components
I
±5 V power supply
I
TSSOP small package
Applications
I
Optical light density measurement
I
Log, log ratio computation
I
Data linearization
Description
The LSP2961 is a single-channel precision logarithm
and log ratio integrated circuit powered by +5 V and
–5 V power supplies. The voltage output of the
amplifier is a logarithmic function of the ratio of a
reference current (IREF) over the input current (IIN).
The scale factor is set internally to 1 V/decade, and
is further adjustable by adding an external resistor.
The input dynamic range for the amplifier is a six-
decade (1 nA to 1 mA) minimum, with seven-decade
(1 nA to 10 mA) and eight-decade (100 pA to 10 mA)
operation available with increased conformity error.
The amplifier has an internal trimmed reference 1
A
± 5% current source that is also externally adjustable
using an external resistor. The output offset voltage
is 100 mV maximum and can be nulled using an
external potentiometer.
The input current is applied to the IN pin and the
corresponding output is taken from the OUTPUT pin.
For a 1 V/decade application in a stable temperature
environment, no external components are required to
obtain the specified performance. For an application
that a scale factor other than 1 V/decade is required,
an external resistor connecting the SCALE FACTOR
pin to either the OUTPUT pin or GND will result in
less or more than 1 V/decade for the scale factor.
The amplifier’s output can range from (VCC – 1 V) to
(VEE + 1 V). This is ideal for the control in optical
density measurements, and in other situations such
as precision logarithm calculations. Each amplifier
has an internally trimmed reference current of 1
A.
This reference current can be changed using an
external resistor connecting to the IREF_ADJ pin, and
either VCC or GND, depending on the need to
increase or decrease the reference current.
Additionally, the maximum output offset voltage is
±100 mV. This can be nulled using an external
potentiometer connected between the ±5 V supplies
and the wiper connected to the VOS_ADJ pin. The
internal block diagram is shown in Figure 1.
The LSP2961 is available in a 3 mm x 3 mm TSSOP
package. The 8-pin LSP2961 requires one negative
5 V power supply (VEE) and one positive 5 V power
information. Figure 3 references the external pin
connections.
OUTPUT
K
IREF
IIN
-------------
log
×
=
相关PDF资料 |
PDF描述 |
|---|---|
| LSP3126ASAD | SWITCHING REGULATOR, PDSO8 |
| LSP3126ASD | SWITCHING REGULATOR, PDSO8 |
| LSP3128SD | SWITCHING REGULATOR, PDSO8 |
| LSP3128SAD | SWITCHING REGULATOR, PDSO8 |
| LSP3603TCAK | SWITCHING REGULATOR, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LSP2B | 功能描述:限位开关 Limit SW/Double Pole Plug-in RoHS:否 制造商:Honeywell 触点形式:SPDT 执行器:Non-Contact 电流额定值:30 mA 电压额定值 AC: 电压额定值 DC:3.6 V 工作力:10 g IP 等级:IP 67 NEMA 额定值:1, 4, 12, 13 端接类型:4-Pin M12 Connector 安装:SMD/SMT |
| LSP2B-1B | 功能描述:限位开关 LIMIT SWITCH RoHS:否 制造商:Honeywell 触点形式:SPDT 执行器:Non-Contact 电流额定值:30 mA 电压额定值 AC: 电压额定值 DC:3.6 V 工作力:10 g IP 等级:IP 67 NEMA 额定值:1, 4, 12, 13 端接类型:4-Pin M12 Connector 安装:SMD/SMT |
| LSP32-K2-RGBA | 制造商:Dialight 功能描述:LED MODULE 32X K2 RGBA |
| LSP-32K2-RGBW | 制造商:Dialight 功能描述: |
| LSP32-K2-RGBW | 制造商:Dialight 功能描述:LED MODULE 32X K2 RGBW |
发布紧急采购，3分钟左右您将得到回复。