THS3215 Series

DC to 650-MHz, Differential-to-Single-Ended, DAC Output Amplifier

Catalog

DC to 650-MHz, Differential-to-Single-Ended, DAC Output Amplifier

Part	Current - Input Bias	Number of Circuits	Mounting Type	Amplifier Type	Voltage - Supply Span (Min) [Min]	-3db Bandwidth	Slew Rate	Voltage - Input Offset	Voltage - Supply Span (Max) [Max]	Current - Output / Channel	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]	Current - Supply	Supplier Device Package	Board Type	Utilized IC / Part	Output Type	Current - Supply (Main IC)	Channels per IC	Supplied Contents	Voltage - Supply, Single/Dual (±) [Min]	Voltage - Supply, Single/Dual (±) [Max]
Texas Instruments THS3215IRGVR	4 µA	1	Surface Mount	Differential	8 V	650 MHz	3000 V/µs	12 mV	15.8 V	95 mA	16-VQFN Exposed Pad	85 °C	-40 °C	35 mA	16-VQFN (4x4)
Texas Instruments THS3215IRGVT	4 µA	1	Surface Mount	Differential	8 V	650 MHz	3000 V/µs	12 mV	15.8 V	95 mA	16-VQFN Exposed Pad	85 °C	-40 °C	35 mA	16-VQFN (4x4)
Texas Instruments THS3215EVM				Differential		650 MHz	3000 V/µs			95 mA						Fully Populated	THS3215	Single-Ended	35 mA	1 - Single	Board(s)	-4 V 8 V	7.9 V 15.8 V

Catalog

DC to 650-MHz, Differential-to-Single-Ended, DAC Output Amplifier

Key Features

• Input stage: internal gain of 2 V/VBuffered differential inputsSingle-ended low impedance outputFull-power bandwidth: 350 MHz (2 VPP)Output stage: gain externally configurableFull-power bandwidth: 270 MHz (5 VPP)Slew rate: 3000 V/µsSPDT input switch and multiplexerFull signal path: input stage and output stageHD2 (20 MHz, 5 VPPto 100 Ω load): –66 dBcHD3 (20 MHz, 5 VPPto 100 Ω load): –68 dBc10 VPPOutput to 100 Ω load using split ±6.5 V supply12 VPPOutput to heavy capacitive loads using single 15 V supplyInternal DC reference buffer with low-impedance outputPower-supply range:Split supply: ±4 V to ±7.9 VSingle supply: 8 V to 15.8 VInput stage: internal gain of 2 V/VBuffered differential inputsSingle-ended low impedance outputFull-power bandwidth: 350 MHz (2 VPP)Output stage: gain externally configurableFull-power bandwidth: 270 MHz (5 VPP)Slew rate: 3000 V/µsSPDT input switch and multiplexerFull signal path: input stage and output stageHD2 (20 MHz, 5 VPPto 100 Ω load): –66 dBcHD3 (20 MHz, 5 VPPto 100 Ω load): –68 dBc10 VPPOutput to 100 Ω load using split ±6.5 V supply12 VPPOutput to heavy capacitive loads using single 15 V supplyInternal DC reference buffer with low-impedance outputPower-supply range:Split supply: ±4 V to ±7.9 VSingle supply: 8 V to 15.8 V

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, theTHS3217, provides the same functional features at higher quiescent power and bandwidth. The THS3215 and THS3217 support the emerging high-speed Texas Instruments DACs for AWG applications, such as theDAC38J82. 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, theTHS3217, provides the same functional features at higher quiescent power and bandwidth. The THS3215 and THS3217 support the emerging high-speed Texas Instruments DACs for AWG applications, such as theDAC38J82.