TPL8002-25_15 Datasheet, PDF (1/13 Pages) Texas Instruments – TANDEM 64-TAP DIGITAL POTENTIOMETER

TPL8002-25
www.ti.com
TANDEM 64-TAP DIGITAL POTENTIOMETER
Check for Samples: TPL8002-25
SLIS133 – NOVEMBER 2009
FEATURES
1
• Adjustable Gain From 23.25 dB to –24 dB
• 64-Tap Positions With 0.75 dB Per Step
• Supports 8-MHz Analog Bandwidth
• Operating Range up to –4-V V_EE/+4-V V_DD
• 100-μA Maximum Static Supply Current
• ±30% End-to-End Resistance Tolerance
• Absolute Tolerance of ±0.3 dB
• Operating Temperature Range From
–40°C to 85°C
• ESD Performance Tested Per JESD 22
– 2000-V Human-Body Model
(A114-B,Class II)
APPLICATIONS
• Tandem Adjustable Feedback and Gain
Resistors for Operational Amplifers
RG1
RF1
RSW1
V_DD
V_EE
RSW2
RF2
RG2
PW PACKAGE
(TOP VIEW)
1
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
GND
A
B
C
D
E
F
GND
DESCRIPTION/ORDERING INFORMATION
The TPL8002-25 is a programmable resistor device implementing two digital potentiometers with 64 wiper
positions each that are tandem controlled through a 6-bit parallel interface. The device has fixed wiper
resistances at the respective wiper contacts that tap the potentiometer resistors at a point determined by the
binary code present at its digital inputs.
The resistive wiper tap terminals, RSW, of the TPL8002-25 are typically connected to the inverting inputs (–) of
an external differential path inverting operational amplifier configuration, with the non-inverting inputs (+)
connected through to ground. The application's differential input to the configuration is the device's RG terminals.
The differential output of the external operational amplifiers is connected to the device's RF terminals, and thus
becomes the differential output of the application configuration.
The resistance between the wiper contacts and the end points RG and RF of the TPL8002-25 provides a
logarithmic gain/attenuation response of the configuration. With a digital code of decimal 0 (b000000) the
configuration has an inverting maximum attenuation of –24 dB. With a digital code of decimal 32 (b100000) the
configuration has inverting unity gain of 0.00 dB. With a digital code of decimal 63 (b111111) the configuration
has an inverting maximum gain of +23.25 dB. The response of the configuration with respect to the digital code
varies in fixed steps of 0.75 dB.
T_A
–40°C to 85°C
TSSOP – PW
ORDERING INFORMATION
PACKAGE^{(1) (2)}
ORDERABLE PART NUMBER TOP-SIDE MARKING
Tape and reel
TPL8002-25PWR
PHY03A
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
1
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.
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.
Copyright © 2009, Texas Instruments Incorporated