THS3217 Series

DC to 800-MHz, Differential-to-Single-Ended, DAC Output Amplifier

Catalog

DC to 800-MHz, Differential-to-Single-Ended, DAC Output Amplifier

Part	Supplier Device Package	Current - Output / Channel	Package / Case	Number of Circuits	Voltage - Supply Span (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Slew Rate	Voltage - Supply Span (Min) [Min]	-3db Bandwidth	Amplifier Type	Current - Input Bias	Current - Supply
Texas Instruments THS3217IRGVT	16-VQFN (4x4)	100 mA	16-VQFN Exposed Pad	1	15.8 V	85 °C	-40 °C	Surface Mount	5000 V/µs	8 V	800 MHz	Differential	1 µA	55 mA
Texas Instruments THS3217IRGVR	16-VQFN (4x4)	100 mA	16-VQFN Exposed Pad	1	15.8 V	85 °C	-40 °C	Surface Mount	5000 V/µs	8 V	800 MHz	Differential	1 µA	55 mA

Catalog

DC to 800-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: 500-MHz (2 VPP)Output Stage: Gain Externally ConfigurableFull-Power Bandwidth: 500-MHz (5 VPP)Slew Rate: 5000 V/µsSPDT Input Switch / MultiplexerFull Signal Path: Input Stage + Output StageHD2 (20 MHz, 5 VPPto 100-Ω Load): –60 dBcHD3 (20 MHz, 5 VPPto 100-Ω Load): –75 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: 500-MHz (2 VPP)Output Stage: Gain Externally ConfigurableFull-Power Bandwidth: 500-MHz (5 VPP)Slew Rate: 5000 V/µsSPDT Input Switch / MultiplexerFull Signal Path: Input Stage + Output StageHD2 (20 MHz, 5 VPPto 100-Ω Load): –60 dBcHD3 (20 MHz, 5 VPPto 100-Ω Load): –75 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 THS3217 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 THS3215, provides the same functional features at lower quiescent power and bandwidth. The THS3217 and the THS3215 support the emerging high-speed Texas Instruments DACs for AWG applications, such as the DAC38J82. The THS3217 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 THS3215, provides the same functional features at lower quiescent power and bandwidth. The THS3217 and the THS3215 support the emerging high-speed Texas Instruments DACs for AWG applications, such as the DAC38J82.