a
CMOS, Low Voltage
Serially Controlled, Octal SPST Switches
ADG714/ADG715
FEATURES
ADG714 SPI™/QSPI™/MICROWIRE™-Compatible Interface
ADG715 I2C™-Compatible Interface
2.7 V to 5.5 V Single Supply
؎2.5 V Dual Supply
2.5 ⍀ On Resistance
0.6 ⍀ On Resistance Flatness
100 pA Leakage Currents
Octal SPST
Power-On Reset
Fast Switching Times
TTL/CMOS-Compatible
Small TSSOP Package
APPLICATIONS
Data Acquisition Systems
Communication Systems
Relay Replacement
Audio and Video Switching
GENERAL DESCRIPTION
The ADG714/ADG715 are CMOS, octal SPST (single-pole,
single-throw) switches controlled via either a 2- or 3-wire serial
interface. On resistance is closely matched between switches and
very flat over the full signal range. Each switch conducts equally
well in both directions and the input signal range extends to the
supplies. Data is written to these devices in the form of 8 bits,
each bit corresponding to one channel.
FUNCTIONAL BLOCK DIAGRAMS
ADG715
ADG714
S1
D1
S1
D1
S2
D2
S2
D2
S3
D3
S3
D3
S4
D4
S4
D4
S5
D5
S5
D5
S6
D6
S6
D6
S7
D7
S7
D7
S8
D8
S8
D8
INPUT SHIFT
REGISTER
INTERFACE
LOGIC
DOUT
RESET
SCLK DIN SYNC RESET
SDA
SCL
A0
A1
On power-up of these devices, all switches are in the OFF condition, and the internal registers contain all zeros.
Low power consumption and operating supply range of 2.7 V to
5.5 V make this part ideal for many applications. These parts
may also be supplied from a dual ± 2.5 V supply. The ADG714
and ADG715 are available in a small 24-lead TSSOP package.
PRODUCT HIGHLIGHTS
The ADG714 uses a 3-wire serial interface that is compatible
with SPI , QSPI, and MICROWIRE and most DSP interface
standards. The output of the shift register DOUT enables a
number of these parts to be daisy chained.
1. 2- or 3-wire serial interface
The ADG715 uses a 2-wire serial interface that is compatible
with the I2C interface standard. The ADG715 has four hard wired
addresses, selectable from two external address pins (A0 and A1).
This allows the 2 LSBs of the 7-bit slave address to be set by
the user. A maximum of four of these devices may be connected
to the bus.
3. Low on resistance, typically 2.5 Ω
2. Single/dual supply operation. The ADG714 and ADG715
are fully specified and guaranteed with 3 V, 5 V, and ± 2.5 V
supply rails.
4. Low leakage
5. Power-on reset
6. Small 24-lead TSSOP package
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.
I2C is a trademark of Philips Corporation.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2002
