© 1999 National Semiconductor Corporation

http://www.national.com

Printed in the U.S.A.

N

General Description

The CLC5958 is a monolithic 14-bit, 52MSPS analog-to-digital

converter. The ultra-wide dynamic range and high sample rate of

the device make it an excellent choice for wideband receivers

found in multi-channel basestations. The CLC5958 integrates a

low distortion track-and-hold amplifier and a 14-bit multi-stage

quantizer on a single die. Other features include differential

analog inputs, low jitter differential clock inputs, an internal

bandgap voltage reference, and CMOS/TTL compatible outputs.

The CLC5958 is fabricated on the National ABIC-V 0.8 micron

BiCMOS process.

The CLC5958 features a 90dB spurious free dynamic range

(SFDR) and a 70dB signal to noise ratio (SNR). The balanced

differential analog inputs ensure low even-order distortion, while

the differential clock inputs permit the use of balanced clock signals

to minimize clock jitter. The 48-pin CSP package provides an

extremely small footprint for applications where space is a critical

consideration. The package also provides a very low thermal

resistance to ambient. The CLC5958 may be operated with a

single +5V power supply. Alternatively, an additional supply may

be used to program the digital output levels over the range of

+3.3V to +5V. Operation over the industrial temperature range of

-40°C to +85°C is guaranteed. National Semiconductor tests

each part to verify compliance with the guaranteed specifications.

CLC5958

14-bit, 52MSPS A/D Converter

Features

• 14-bit

• 52MSPS

• Ultra-wide dynamic range

Noise floor: -72dBFS

SFDR: 90dB

• Excellent performance to Nyquist

• IF sampling capability

• Very small package: 48-pin CSP

• Programmable output levels:

3.3V to 5V

Applications

• Multi-channel basestations

• Multi-standard basestations:

GSM, WCDMA, DAMPS, etc.

• Smart antenna systems

• Wireless local loop

• Wideband digital communications

September 1999

Single-Tone Output Spectrum

Frequency (MHz)

0

-20

-120

0

5

25

-40

-60

-80

-100

10

15

20

Sample Rate = 52MSPS

Input Frequency = 5MHz

Output Response with GSM 1800 Blocker

Frequency (MHz)

-20

-40

-60

-80

-100

-120

0

5

25

10

15

20

Full Scale = -24dBM

Res. BW = 200KHz

-25dBm blocker

-101dBm reference

Actual Size

(Bottom View)