SPT SPT7830SCS, SPT7830SCU Datasheet

SPT7830

A

A

10-BIT, 2.5 MSPS, SERIAL OUTPUT A/D CONVERTER

FEATURES

• 10-Bit, 1 kHz to 2.5 MSPS Analog-to-Digital Converter

• Monolithic CMOS

• Serial Output

• Internal Sample-and-Hold

• Analog Input Range: 0 to 2 V Nominal; 3.3 V Max

• Power Dissipation (Excluding Reference Ladder)
45 mW at +5 V
16 mW at +3.0 V

• Single Power Supply: +3 V to +5 V Range

• High ESD Protection: 3,000 V Minimum

GENERAL DESCRIPTION

The SPT 10-bit, 2.5 MSPS, serial analog-to-digital converter
delivers excellent high speed conversion performance with
low cost and low power. The serial port protocol is compatible
with the serial peripheral interface (SPI) or MICROWIRE™
industry standard, high-speed synchronous MPU interfaces.
The large input bandwidth and fast transient response time
allow for CCD applications operating up to 2.5 MSPS.

BLOCK DIAGRAM

APPLICATIONS

• Handheld and Desktop Scanners

• DSP Interface Applications

• Portable Digital Radios

• Portable and Handheld Applications

• Automotive Applications

• Remote Sensing

The device can operate with a power supply range from
+3 V to +5 V with very low power dissipation. The small
package size makes this part excellent for hand-held appli­cations where board space is a premium. The SPT7830 is
available in an 8-lead SOIC package over the commercial
temperature range. Contact the factory for availability of die
and industrial temperature range versions.

Ground

V

DD

Track-and-Hold

Analog Input

Clock

Start Convert

SAR

10-Bit

A/D

AAAAAAAAAAAAAAAA

Timing And Control

AAAAAAAAAAAAAAAA

V

REF+

V

REF-

Serial

Output

Logic

Signal Processing Technologies, Inc.

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: [phone] FAX: [phone]

Data Out

ABSOLUTE MAXIMUM RATING (Beyond which damage may occur)

1

Supply Voltages

VDD...........................................................................+6 V

Input Voltages

Analog Input.................................................. -0.7 to +6 V

V

+ ........................................................... -0.7 to +6 V

REF

V

- ............................................................ -0.7 to +6 V

REF

Clock and SC............................................... -0.7 to +6 V

Output

Data Out.................................................................10 mA

Temperature

Operating, ambient ................................... 0 to +70 °C

junction.........................................+175 °C

Lead, Soldering (10 seconds).............................+300 °C

Storage .....................................................-65 to +150 °C

Note: 1. Operation at any Absolute Maximum Ratings is not implied. See Electrical Specifications for proper nominal applied

conditions in typical applications.

ELECTRICAL SPECIFICATIONS

TA = +25 °C, VDD = +5.0 V, VIN = 0 to +3 V, f

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

DC ELECTRICAL CHARACTERISTICS

DC Performance

Resolution 10 Bits
Differential Linearity I ±0.5 ±1.0 LSB
Integral Linearity I ±1.0 ±1.5 LSB
No Missing Codes I Guaranteed

Analog Input

Input Voltage Range
Input Resistance I 5 MΩ
Input Capacitance IV 5 pF
Input Bandwidth (Small Signal) IV 30 MHz
Offset IV -2 +2 % of FSR
Gain Error IV -2 +2 % of FSR

Reference Input

Resistance IV 250 280 350 Ω
Voltage Range

2

V

REF-

2

V

REF+

V

REF+ -VREF-

Reference Settling Time IV 90 ns

Timing Characteristics

Maximum Conversion Rate I 2.5 1.0 MSPS
Minimum Conversion Rate IV 1 kSPS
Maximum External Clock Rate I 35 14 MHz
Minimum External Clock Rate IV 14 kHz
Aperture Delay Time IV 5 ns
Aperture Jitter Time IV 5 ps
Data Output LSB Hold Time T

1

Percentages refer to percent of [(V

2

∆ = Minimum (V

1

1

(∆) IV 1/10 V

REF+

REF+ -VREF-

)

= 35 MHz, fS = 2.5 MSPS, V

CLK

TEST TEST

to T

MIN

) -(V

REF-

MAX

)]

REF

+ = +3.0 V, V

IV V

REF-

IV -4% 0 V
IV V

IV68 ns

- = 0.0 V, unless otherwise specified.

REF

+4% V

+∆ 2/3 V

REF-

DD

REF+

REF+

-6% V

-∆ V

DD

V
V

SPT

SPT7830

2 12/19/97

ELECTRICAL SPECIFICATIONS

TA = +25 °C, VDD = +5.0 V, VIN = 0 to +3 V, f

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

Dynamic Performance

Effective Number of Bits

f

= 500 kHz IV 8.9 Bits

IN

f

= 1 MHz IV 8.5 Bits

IN

Signal-to-Noise Ratio

f

= 500 kHz IV 56 dB

IN

f

= 1 MHz IV 55 dB

IN

Harmonic Distortion

f

= 500 kHz IV 63 dB

IN

fIN = 1 MHz IV 58 dB

Power Supply Requirements

+V

Supply Voltage IV 3 5.5 V

DD

+V

Supply Current VDD = 3.0 V IV 5.4 7 mA

DD

Power Dissipation

3

Excluding reference ladder.

3

= 35 MHz, fS = 2.5 MSPS, V

CLK

TEST TEST

V

= 5.0 V I 9 10 mA

DD

VDD = 3.0 V IV 16 22 mW
VDD = 5.0 V I 45 50 mW

+ = +3.0 V, V

REF

- = 0.0 V, unless otherwise specified.

REF

TEST LEVEL CODES

All electrical characteristics are subject to the
following conditions:

All parameters having min/max specifications
are guaranteed. The Test Level column indi­cates the specific device testing actually per­formed during production and Quality Assur­ance inspection. Any blank section in the data
column indicates that the specification is not
tested at the specified condition.

TEST LEVEL

I

II

III

IV

V

VI

TEST PROCEDURE

100% production tested at the specified temperature.
100% production tested at TA=25 °C, and sample

tested at the specified temperatures.
QA sample tested only at the specified temperatures.
Parameter is guaranteed (but not tested) by design

and characterization data.
Parameter is a typical value for information purposes

only.
100% production tested at TA = +25 °C. Parameter is

guaranteed over specified temperature range.

SPT

SPT7830

3 12/19/97