THS3215 Datasheet, PDF (1/71 Pages) Texas Instruments – THS3215 650-MHz, Differential to Single-Ended DAC Output Amplifier

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THS3215
SBOS780A – MARCH 2016 – REVISED APRIL 2016
THS3215 650-MHz, Differential to Single-Ended DAC Output Amplifier
1 Features
•1 Input Stage: Internal Gain of 2 V/V
– Buffered Differential Inputs
– Single-Ended Low Impedance Output
– Full-Power Bandwidth: 350 MHz (2 V_PP)
• Output Stage: Gain Externally Configurable
– Full-Power Bandwidth: 270 MHz (5 V_PP)
– Slew Rate: 3000 V/µs
– SPDT Input Switch and Multiplexer
• Full Signal Path: Input Stage + Output Stage
– HD2 (20 MHz, 5 V_PP to 100-Ω Load): –66 dBc
– HD3 (20 MHz, 5 V_PP to 100-Ω Load): –68 dBc
– 10-V_PP Output to 100-Ω Load Using Split
±6.5-V Supply
– 12-V_PP Output to Heavy Capacitive Loads
Using Single 15-V Supply
• Internal DC Reference Buffer with Low-Impedance
Output
• Power-Supply Range:
– Split Supply: ±4 V to ±7.9 V
– Single Supply: 8 V to 15.8 V
2 Applications
• Digital-to-Analog Converter (DAC) Output
Amplifier
• Wideband Arbitrary Waveform Generator (AWG)
Output Driver
• Predriver to > 20-V_PP Output Amplifier (THS3091)
• Single-Supply, High-Capacitive Load Driver for
Piezo Elements
3 Description
The THS3215 combines the key signal-chain
components required to interface with a
complementary-current output, digital-to-analog
converter (DAC). The flexibility provided by this two-
stage amplifier system delivers the low distortion, dc-
coupled, differential to single-ended signal processing
required by a wide range of systems. The input stage
buffers the DAC resistive termination, and converts
the signal from differential to single-ended with a
fixed gain of 2 V/V. The differential to single-ended
output is available externally for direct use, and can
also be connected through an RLC filter or attenuator
to the input of an internal output power stage (OPS).
The wideband, current-feedback, output power stage
provides all pins externally for flexible gain setting.
An internal 2 × 1 multiplexer (mux) to the output
power stage noninverting input provides an easy
means to select between the internal differential-to-
single-ended stage (D2S) output or an external input.
An optional on-chip midsupply buffer provides a
wideband, low-output-impedance source for biasing
during single-supply operation through the signal-path
stages. This feature provides very simple biasing for
single-supply, ac-coupled applications operating up to
a maximum 15.8-V supply. An external input to this
buffer allows for a dc error-correction loop, or a
simple output dc offset feature.
A companion device, the THS3217, provides the
same functional features at higher quiescent power
and bandwidth. The THS3215 and the THS3217
support the emerging high-speed Texas Instruments
DACs for AWG applications, such as the DAC38J82.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
THS3215
VQFN (16)
4.00 mm × 4.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Gain = 5 V/V, Differential-to-Single-Ended Line Driver With Optional External Filter
VREF
100
50
x1
25
DAC
Complementary
Output Current
Input
Vi
Buffers
25
250
x1
D2S
Stage
+
500
THS3215
162
Output Power
Stage (OPS)
SPDT
Switch
249
50
VOUT = 5 Vi
50
Line
RLC Filter
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.