spt9712 Fairchild Semiconductor, spt9712 Datasheet

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spt9712

Manufacturer Part Number
spt9712
Description
12-bit, 100 Mwps Ecl D/a Converter
Manufacturer
Fairchild Semiconductor
Datasheet

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FEATURES
• 12-Bit, 100 MWPS digital-to-analog converter
• ECL compatibility
• Low power: 600 mW
• 1/2 LSB DNL
• 40 MHz multiplying bandwidth
• Industrial temperature range
• Superior performance over AD9712
GENERAL DESCRIPTION
The SPT9712 is a 12-bit, 100 MWPS digital-to-analog
converter designed for direct digital synthesis, high reso-
lution imaging, and arbitrary waveform generation applica-
tions.
This device is pin-for-pin compatible with the AD9712 with
significantly improved performance. The only difference
between the SPT9712 and the AD9712 is that the Latch
Enable (LE, pin 26) for the SPT9712 is rising-edge trig-
BLOCK DIAGRAM
– Improved settling time of 13 ns
– Improved glitch energy 15 pV-s
– Master-slave latches
12-BIT, 100 MWPS ECL D/A CONVERTER
APPLICATIONS
• Fast frequency hopping spread spectrum radios
• Direct sequence spread spectrum radios
• Microwave and satellite modems
• Test & measurement instrumentation
gered (see figure 1), whereas the Latch Enable (LE, pin
26) for the AD9712 functions in the transparent mode.
The SPT9712 is an ECL-compatible device. It features a
fast settling time of 13 ns and low glitch impulse energy of
15 pV-s, which results in excellent spurious-free dynamic
range characteristics.
The SPT9712 is available in a 28-lead PLCC package in
the industrial temperature range (–40 to +85 °C).
SPT9712
TECHNICAL DATA
FEBRUARY 15, 2001

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spt9712 Summary of contents

Page 1

... The SPT9712 is an ECL-compatible device. It features a fast settling time and low glitch impulse energy of 15 pV-s, which results in excellent spurious-free dynamic range characteristics. The SPT9712 is available in a 28-lead PLCC package in the industrial temperature range (–40 to +85 °C). TECHNICAL DATA FEBRUARY 15, 2001 ...

Page 2

... UNITS Bits LSB LSB LSB LSB PPM/°C µA µA µA/° MWPS ns ns pV-s mA dBc dBc dBc dBc µA/V SPT9712 2/15/01 ...

Page 3

... A = +25 °C . Parameter is guaranteed A UNITS k MHz V ppm/°C M MHz V V µA µ SPT9712 2/15/01 ...

Page 4

... POWER SUPPLIES AND GROUNDING The SPT9712 requires the use of a single –5.2 V supply. All supplies should be treated as analog supply sources. This means the ground returns of the device should be connected to the analog ground plane. All supply pins should be bypassed with .01 µ ...

Page 5

... Figure 1 – Timing Diagram Figure 2 – Typical Interface Circuit W 5 SPT9712 2/15/01 ...

Page 6

... PACKAGE OUTLINE 28-Lead PLCC INCHES SYMBOL MIN A 0.452 B 0.485 C D 0.170 E 0.020 F 0.031 G 0.013 H 0.048 I 0.410 6 MILLIMETERS MAX MIN MAX 0.456 11.48 11.58 0.495 12.32 12.57 30° 30° 0.179 4.32 4.55 0.025 0.51 0.64 0.035 0.79 0.89 0.021 0.33 0.53 0.052 1.22 1.32 0.430 10.41 10.92 SPT9712 2/15/01 ...

Page 7

... Connection for External Resistance Reference When Using Internal Amplifier Nominally 7.5 k Analog Return Ground Analog Negative Supply (–5 Digital Negative Supply (–5 Digital Ground Return Not Connected Set PACKAGE 28L PLCC 28L PLCC © Copyright 2002 Fairchild Semiconductor Corporation ) SPT9712 2/15/01 ...

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