LTC221 Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches

The LTC221 and LTC222 are micropower, quad CMOS analog switches which typically dissipate only 250µW from ±15V supplies and 40µW from a single 5V supply. Onboard latches allow the LTC221 and LTC222 to interface directly to most microprocessor buses. The switches have 65 Ohms typical on resistance and a very high off resistance. A break before make characteristic is inherent in these switches to prevent the shorting of two channels. The signal range is ±15V with a supply voltage of ±15V and 0V to 5V with a single 5V supply. The switches have special charge compensation circuitry which greatly reduces charge injection to a maximum of ±25pC (±15V supplies).

The LTC221 and LTC222 are designed for applications such as microprocessor controlled programmable gain amplifiers, automatic test equipment, communication systems, and data acquisition systems. The LTC221 is normally closed and the LTC222 is normally open as shown in the Logic Table

产品特点 Features

Micropower Operation
Single 5V or ±15V Supply Operation
Low Charge Injection
Low RON
Low Leakage
Guaranteed Break Before Make
Latch Resistant Design
TTL/CMOS Compatible
Improved Second Source for DG221/DG222
Microprocessor Bus Compatible

封装

应用

Supply Current..................
I+ = 40µA, I- = 5µA Max
Charge Injection
±15V Supplies.................. �25pC Max
Single 5V Supply.................. 2pC Typ
RON................... 65 Ohms Typ
Signal Range.................... ±15V

典型应用图

LTC221 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC221CN	PDIP	16	C	$2.83	$2.30
LTC221CN#PBF	PDIP	16	C	$2.83	$2.30
LTC221CS	SO	16	C	$3.25	$2.65
LTC221CS#PBF	SO	16	C	$3.25	$2.65
LTC221CS#TR	SO	16	C		$2.71
LTC221CS#TRPBF	SO	16	C		$2.71

LTC221 数据手册及相关资料下载

数据手册(英文) : LTC221 - Micropower, Low Charge Injection, Quad CMOS Analog Switches with Data Latches.PDF
可靠性数据 : R251 Reliability Data .PDF