TS4100/01/02 Data Sheet
"Rail-to-Rail Plus"™, 1% RON Flatness, 0.8 V to 5.25 V Analog
Switches/Multiplexers
The TS410x family of analog switches and multiplexers consists of the TS4100 8-chan-
nel analog multiplexer, the TS4101 dual 4-channel analog multiplexer, and the TS4102
triple single-pole/double-throw (SPDT) switch. These switches are unique because they
can operate at supply voltages as low as 0.8 V while accepting input signal swings
above the supply voltage up to 5.25 V ("Rail-to-Rail Plus"™). The on-resistance variation
over the entire signal swing range is less than 1%, exhibiting excellent linearity and con-
sistency in dynamic and measurement applications. With a supply current of only 675
nA, the TS4100-TS4102 family input and output leakage is less than 0.5 nA, both when
off and when on.
The TS4100-TS4102 are fully specified over the –40 °C to +85 °C temperature range
and is available in a low-profile, thermally-enhanced 16-pin 3.3 mm TQFN package with
an exposed back-side paddle. For best performance, solder exposed back-side paddle
to PCB ground.
Applications
• Low Voltage Battery-Operated Equipment
• Precision Measurement
• Analog Signal Processing
• Communication Circuits
• Audio Signal Routing
• Low-Voltage Data-Acquisition Systems
Functional Block Diagrams
KEY FEATURES
• Low Supply Voltage Operation: 0.8 V to
5.25 V
• On-resistance of 80 Ω
• "Rail to Rail Plus"™ input/output voltages
can exceed the supply rails
• Guaranteed Low Off and On Leakage: ±0.5
nA
• Guaranteed Match Between Channels: 9 Ω
• Guaranteed <1% On-Resistance Variation
Across Input Voltage
• TS4100: 8-Channel Switch/Multiplexer
• TS4101: Two 4-Channel Switches/
Multiplexers
• TS4102: Three Single-Pole/Double-Throw
Switches (SPDT)
• Supply Current: 675 nA
• 16-Pin, Low-Profile, Thermally Enhanced 3
mm x 3 mm TQFN Package
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TS4100/01/02 Data Sheet
Ordering Information
1. Ordering Information
Ordering Part Number
TS4100ITQ1633
TS4101ITQ1633
TS4102ITQ1633
Description
8:1 analog multiplexer
Two 4:1 analog multiplexers
Three 2:1 SPDT analog switches
Package
TQFN-16 (3 x 3 mm)
TQFN-16 (3 x 3 mm)
TQFN-16 (3 x 3 mm)
Note:
1. Adding the suffix “T” to the part number (e.g., TS4100ITQ1633T) denotes tape and reel.
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TS4100/01/02 Data Sheet
System Overview
2. System Overview
The TS4100 is an 8-channel multiplexer with inputs NO0-NO7 and output COM. A channel can be selected via address pins ADDA,
ADDB, and ADDC.
The TS4101 is a dual 4-channel switch/multiplexer with two separate input banks: NO0A-NO3A and NO0B-NO3B with dedicated output
COMA and COMB, respectively. A channel can be selected via address pins ADDA and ADDB.
The TS4102 is a triple single-pole/double-throw (SPDT) switch. When ADDA, ADDB, or ADDC is set to a Low state, the output will be
NCA, NCB, or NCC, respectively. When ADDA, ADDB, or ADDC is set to a High state, the output will be NOA, NOB, or NOC, respec-
tively. Refer to XREF DIGITAL I/O SETTINGS TABLE
Unlike similar switch/multiplexer devices, the TS4100-TS4102 input voltage is independent of the supply voltage. This allows the input
voltage to be greater than the supply voltage while maintaining a flat On-resistance vs. the VNO/VCOM curve. Refer to
3.1 Typical
Performance Characteristics
for more information.
2.1 Applications Information
2.1.1 AC Performance Considerations
2.1.2 Off Isolation
Like all switch/multiplexer devices, the off-isolation of the device is measured when the device is off (see
Figure 2.8 TS4100-TS4102
Charge Injection Test Setup on page 8).
During the OFF state, part of the input signal couples to the output load. To maximize the
off-isolation, maximize your capacitive load and minimize your resistive load. The trade-off is that this can increase the insertion loss of
the device so it must be considered when designing a circuit. The insertion loss is measured when the switch/multiplexer is in the ON
state (see
Figure 2.9 TS4100-TS4102 Off-Isolation Test Setup on page 9).
At 10 kHz, the off-isolation of the TS4100-TS4102 is approximately –88 dB. Refer to the Off-Isolation vs. Frequency plot in
3.1 Typical
Performance Characteristics.
2.1.3 Total Harmonic Distortion (THD)
In audio and data acquisition applications, signal fidelity is of a concern. As a result, the THD parameter of the analog mux/switch be-
comes an important factor. Many current analog switch/mux devices on the market implement a design that allow for a large variation of
on-resistance as the input signal is changing. With 1% on-resistance variation over the entire signal swing, the TS4100-TS4102 design
minimizes THD. At 10 kHz, the TS4100-TS4102 exhibits a THD of 0.15% over the entire signal swing.
2.1.4 Bandwidth Considerations
The magnitude of the output resistive load and capacitive load has an impact on the bandwidth of the mux/switch. At dc or close to dc
input signals, a resistive load has the greatest impact where the output voltage is determined primarily by the voltage divider consisting
of the switch on-resistance and the output resistive load. To minimize the ON insertion loss, maximize the resistive load.
As the input frequency increases, the ac impedance of the circuit begins to have an impact on bandwidth of the mux/switch. To counter
this effect, minimize the load capacitance and any stray capacitance that may be present on the board. Also, ensure a board layout that
minimizes signal trace lengths.
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System Overview
2.1.5 Programmable Gain Amplifier (PGA) with the TS4100
Analog signals can vary in amplitude and frequency especially when considering various taypes of sensors such as thermistors, strain
gauges, and photodiodes. To process the analog signals provided by the sensor, a stand-alone ADC such as a TS7001 or TS7003 can
be used. However, to take advantage of the resolution of the ADC, the analog signals must be scaled up to the maximum input voltage
range of the ADC.
One way to achieve this is by designing a 1.5 V non-inverting programmable gain amplifier (PGA) that incorporates a TS1005 opera-
tional amplifier and a TS4100 analog multiplexer as shown in the figure below. The gain can be changed from 2 to 8 via address pins
ADDA, ADDB, and ADDC.
With the TS4100 connected to ground, the on-resistance of the switch becomes part of the gain of the amplifier and needs to be ac-
R1
counted for in the following gain equation:
GAIN
= 1 +
RGX
+
RON
where RON is 80 Ω (typ) and RGX is the resistor connected to the TS4100 input. Unlike other analog switches, the TS4100 on-resist-
ance variation over the entire signal swing range is less than 1%. In this circuit, the corresponding gain variation is less than 0.03%
across all channels. This circuit accommodates an input signal bandwidth of 2.5 kHz to 10 kHz. Also, by connecting the TS4100 to
ground, internal switching spikes are minimized. Refer to
2.1.7 Charge Pump Effect Considerations.
Figure 2.1. Non-Inverting Programmable Gain Amplifier (PGA) with TS4100
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System Overview
2.1.6 Switched-Capacitor Voltage Doubler with the TS4102 and TS3004 Timer
In portable applications, it is a common requirement for a battery to continue to supply power to a circuit when it has discharged to a
voltage unusable by other devices in the system. To address this, a simple voltage doubler can be designed using two SPDT switches
in a single TS4102 device and a TS3004 timer as shown in the figure below.
In this configuration, the TS3003 timer FOUT output provides a 200 Hz (50% Duty Cycle) clock signal to address pin ADDA and ADDB
that switches between 0 V and VDD. When the clock signal to the address pins ADDA and ADDB is 0 V, capacitor C1 is charged to
VSUPPLY. When the clock input is VDD, the charge in C1 is passed to C2 and effectively doubles the voltage at NOB to 2 x VSUPPLY.
Unlike other analog switches, the TS4102 allows the supply voltage to be independent of the common mode input voltage. In this con-
figuration, the TS4102 allows the supply voltage to be independent of the common mode input voltage. In this configuration, the
TS4102 and the TS3004 can operate at a supply voltage range of 1.55 V to 5.25 V while the output voltage is 5 V with VSUPPLY = 2.5
V. With VDD = 1.55 V, the complete circuit consumes only 3 μA of supply current and can drive an output load of up to 48 μA (5% drop
at VOUT).
Figure 2.2. Switched-Capacitor Voltage Doubler with TS4102 and TS3004 Timer
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