SPT SPT7864SIR Datasheet

Signal Processing Technologies, Inc.

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: [phone] Fax: [phone] Web Site: http://www .spt.com e-mail: [e-mail]

SPT7864

10-BIT, 40 MSPS A/D CONVERTER

PRELIMINARY INFORMATION

APPLICATIONS

• High-speed applications where low power dissipation is
required

• Video imaging

• Medical imaging

• Radar receivers

• IR imaging

• Digital communications

FEATURES

• 40 MSPS maximum sample r ate

• 9.5 eff ectiv e n umber of bits at ƒIN = 10 MHz and
ƒS = 40 MSPS

•2 V

P-P

full-scale input range

• Diff erential input 2.5 V common mode

• Internal or external voltage ref erence

• Common-mode v oltage reference output

• +3.3 V / +5 V digital output logic compatibility

• +5 V analog power supply

GENERAL DESCRIPTION

The SPT7864 is a 10-bit, 40 MSPS analog-to-digital con­verter with low power dissipation at only 395 mW typical at
40 MSPS with a power supply of +5.0 V. The digital outputs
are +3 V or +5 V, and are user selectable. The SPT7864
has incorporated proprietary circuit design and CMOS

processing technologies to achieve its advanced perfor­mance. Inputs and outputs are TTL/CMOS compatible to
interface with TTL/CMOS logic systems. Output data for­mat is straight binary.

The SPT7864 is available in a 28-lead SSOP package
over the industrial temperature range.

BLOCK DIAGRAM

Bias

Cell

V

CM

V

DD

GND

10-BIT

40 MSPS

ADC

THA

V

IN

Data

Output

Latches

& Buffers

10

10

GND OV

DD

Bandgap

Reference

2

CLK, CLK

V

IN

REF

H

REF

L

Sleep

1

OR

EXT/INT

D0D9

SPT

2 8/15/00

SPT7864

ABSOLUTE MAXIMUM RATINGS (Beyond which damage may occur)1 25 °C

Supply V oltages

VDD....................................................................... TBD

OVDD..................................................................... TBD

Input V oltages

Analog Input .......................................................... TBD

CLK Input .............................................................. TBD

Note: 1. Operation at any Absolute Maximum Rating is not implied. See Electrical Specifications for proper nominal applied conditions in typical

applications.

Output

Digital Outputs....................................................... TBD

T emperature

Operating Temperature ........................... –40 to +85 °C

Storage Temperature ............................ –65 to +150 °C

ELECTRICAL SPECIFICATIONS

TA=T

MIN

to T

MAX

, VDD=+5.0 V , ƒS=40 MSPS, V

RHS

=3.0 V, V

RLS

=2.0 V, unless otherwise specified.

TEST TEST SPT7864

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS
Resolution 10 Bits
DC Accuracy

Differential Linearity Error (DLE) @ +25 °C V ±0.4 LSB

full temperature ±0.75 LSB

Integral Linearity Error (ILE) @ +25 °C V ±0.5 LSB

full temperature ±1.0 LSB

No Missing Codes VI Guaranteed

Analog Input

Input Voltage Range (Differential) V ±1 V
Input Common Mode V 2.5 V
Input Capacitance V 2 pF
Common Mode Rejection Ratio (CMRR) TBD

Timing Characteristics

Conversion Rate VI 40 MSPS
Pipeline Delay (Latency) IV 7 clocks
Output Delay (t

D

) IV TBD TBD TBD ns
Aperture Delay Time V TBD ns
Aperture Jitter Time V TBD ps (rms)

Dynamic Performance

Effective Number of Bits (ENOB)

ƒ

IN

= 10 MHz, ƒ

CLK

= 40 MSPS 25 °C I 9.3 9.5 Bits

–40 °C to +85 °C IV 9.0 9.2 Bits

Signal-to-Noise Ratio (SNR)

ƒ

IN

= 10 MHz, ƒ

CLK

= 40 MSPS 25 °C I 58 59 d B

–40 °C to +85 °C IV 57 5 8 dB

Total Harmonic Distortion (THD)

ƒ

IN

= 10 MHz, ƒ

CLK

= 40 MSPS 25 °C I –71 –68 dB

–40 °C to +85 °C IV –70 –67 dB

Signal-to-Noise and Distortion (SINAD)

ƒ

IN

= 10 MHz, ƒ

CLK

= 40 MSPS 25 °C I 58 59 d B

–40 °C to +85 °C IV 56 5 7 dB

Spurious Free Dynamic Range (SFDR)

ƒ

IN

= 10 MHz, ƒ

CLK

= 40 MSPS 25 °C I 70 73 d B

–40 °C to +85 °C IV 68 7 1 dB