The AD8001 is well suited for driving high-speed analog-to-digital converters, such as the AD9058.
The AD9058 is a dual 8-bit 50 Msps ADC. In the circuit shown, there are two AD8001s driving the in-puts of the AD905f8 which are configured for 0- to +2-V ranges. Bipolar input signals are buffered, amplified (-2x), and offset (by +1.0 V) into the proper input range of the ADC. Using the AD9058's internal +2-V reference connected to both ADCs (as shown) reduces the number of external com-ponents required to create a complete data acquisition system. The 20-Ω resistors in series with ADC input are used to help the AD8001 drive the 10-pf' ADO input capacitance. The two AD8001s only add 100 mW to the power consumption while not limiting the performance of the circuit.
The AD9058 combines two independent high performance 8-bit analog-to-digital converters (ADCs) on a single monolithic IC. Combined with an optional onboard voltage reference, the AD9058 provides a cost effective alternative for systems requiring two or more ADCs.
Dynamic performance (SNR, ENOB) is optimized to provide up to 50 MSPS conversion rates. The unique architecture results in low input capacitance while maintaining high performance and low power (<0.5 watt/channel). Digital inputs and outputs are TTL compatible. Performance has been optimized for an analog input of 2 V p-p (± 1 V; 0 V to +2 V). Using the onboard +2 V voltage reference, the AD9058 can be set up for unipolar positive operation (0 V to +2 V). This internal voltage reference can drive both ADCs. Commercial (0°C to +70°C) and military (55°C to +125°C) temperature range parts are available. Parts are supplied in hermetic 48-lead DIP and 44-lead "J" lead packages.
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Quadrature Demodulation for CommunicationsDigital OscilloscopesElectronic WarfareRadar
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Two Matched ADCs on Single Chip50 MSPS Conversion SpeedOn-Board Voltage ReferenceLow Power (<1W)Low Input Capacitance (10 pF)65 V Power SuppliesFlexible Input Range
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Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 V to +2.5 V
+VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6 V
VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.8 V to 6 V2
Digital Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 V to +VS
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Voltage Reference Current . . . . . . . . . . . . . . . . . . . . . 53 mA
+VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.5 V
VREF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5
Operating Temperature Range
AD9058JD/JJ/KD/KJ . . . . . . . . . . . . . . . . . . . 0°C to +70°C
Maximum Junction Temperature3
AD9058JD/JJ/KD/KJ . . . . . . . . . . . . . . . . . . . . . . . . +175°C
Storage Temperature Range . . . . . . . . . . .65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
Post a Buying Lead
Required Field 
