SPT SPT7863SCS, SPT7863SCT Datasheet

SPT

SPT7863

SIGNAL PROCESSING TECHNOLOGIES

FEATURES

• Monolithic 40 MSPS Converter

• 160 mW Power Dissipation

• On-Chip Track-and-Hold

• Single +5 V Power Supply

• TTL/CMOS Outputs

• 5 pF Input Capacitance

• Low Cost

• Tri-State Output Buffers

• High ESD Protection: 3,500 V Minimum

• Selectable +3 V or +5 V Logic I/O

GENERAL DESCRIPTION

The SPT7863 is a 10-bit monolithic, low cost, ultralow power
analog-to-digital converter capable of minimum word rates
of 40 MSPS. The on-chip track-and-hold function assures
very good dynamic performance without the need for exter­nal components. The input drive requirements are mini­mized due to the SPT7863's low input capacitance of only
5 pF.

Power dissipation is extremely low at only 160 mW typical at
40 MSPS with a power supply of +5.0 V. The digital outputs

10-BIT, 40 MSPS,160 mW A/D CONVERTER

APPLICATIONS

• All High-Speed Applications Where
Low Power Dissipation is Required

• Video Imaging

• Medical Imaging

• Radar Receivers

• IR Imaging

• Digital Communications

are +3 V or +5 V, and are user selectable. The SPT7863 is
pin-compatible with the entire family of SPT 10-bit, CMOS
converters (SPT7835/40/50/55/60/61) which simplifies up­grades. The SPT7863 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 SPT7863 is available in 28-lead SOIC and 32-lead small
(7 mm square) TQFP packages over the commercial tem­perature range.

BLOCK DIAGRAM

A

IN

CLK In

Enable

Data
Valid

Ref

In

Signal Processing Technologies, Inc.

Timing

and

Control

1:16
Mux

P1

P2

.

.

.

P15

P16

ADC Section 1

T/H

ADC Section 2

ADC Section 15

ADC Section 16

T/H

.
.
.

Auto-

Zero

CMP

Auto-

Zero

CMP

Reference Ladder

11-Bit

SAR

DAC

11-Bit

SAR

DAC

11

.
.
.

11

V

REF

4755 Forge Road, Colorado Springs, Colorado 80907, USA

Phone: [phone] FAX: [phone]

11

11

.
.
.

11

11

11-Bit

16:1
Mux/

Error

Correction

D10 Overrange

D9 (MSB)

D8

D7

D6

D5

D4

D3

D2

D1

DØ (LSB)

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

Supply Voltages

AVDD.........................................................................+6 V

Output

Digital Outputs .......................................................10 mA

DVDD........................................................................+6 V

Temperature

Input Voltages

Analog Input..................................-0.5 V to AVDD +0.5 V

V

............................................................................

REF

0 to AV

CLK Input .................................................................. V

AV

DD

- DV

...............................................................

DD

±100 mV

DD
DD

Operating Temperature ................................. 0 to +70 °C

Junction Temperature ......................................... +175 °C

Lead Temperature, (soldering 10 seconds)........ +300 °C

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

AGND - DGND...................................................±100 mV

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

applied conditions in typical applications.

ELECTRICAL SPECIFICATIONS

TA=T

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

Resolution 10 Bits
DC Accuracy

Analog Input

Reference Input

Reference Settling Time

Conversion Characteristics

Dynamic Performance

to T

MAX

Integral Nonlinearity VI ±1.0 LSB
Differential Nonlinearity VI ±0.5 LSB
No Missing Codes VI Guaranteed

Input Voltage Range VI V
Input Resistance IV 50 kΩ
Input Capacitance V 5.0 pF
Input Bandwidth (Small Signal) V 250 MHz
Offset V ±2.0 LSB
Gain Error V ±0.2 %

Resistance VI 300 500 600 Ω
Bandwidth V 100 150 MHz
Voltage Range

V

RLS

V

RHS

V

RHS

∆(V

RHF

∆(V

RLS

V

RHS

V

RLS

Maximum Conversion Rate VI 40 MHz
Minimum Conversion Rate IV 2 MHz
Pipeline Delay (Latency) IV 12
Aperture Delay Time V 4.0 ns
Aperture Jitter Time V 30 ps(p-p)

Effective Number of Bits

fIN=3.58 MHz VI 9.2 Bits
fIN=10 MHz V 8.7 Bits

, AVDD=DVDD=+5.0 V, VIN=0 to 4 V, fS=40 MSPS, V

MAX

TEST TEST SPT7863

IV 0 - 2.0 V
IV 3.0 - AV

- V

RLS

- V

- V

)V90mV

RHS

)V75mV

RLF

V 1.0 4.0 5.0 V

V15Clock Cycles
V20Clock Cycles

RHS

=4.0 V, V

RLS

=0.0 V, unless otherwise specified.

RLS

V

RHS

DD

V

V

Clock Cycles

SPT

SPT7863

2 4/30/98

ELECTRICAL SPECIFICATIONS

TA=T

PARAMETERS CONDITIONS LEVEL MIN TYP MAX UNITS

Dynamic Performance

Spurious Free Dynamic Range f
Differential Phase V ±0.3 Degree
Differential Gain V ±0.3 %

Inputs

Digital Outputs

Power Supply Requirements

to T

MAX

Signal-to-Noise Ratio
(without Harmonics)

fIN=3.58 MHz VI 55 57 dB
fIN=10 MHz V 54 dB

Harmonic Distortion

f

IN

fIN=10 MHz V 62 dB

Signal-to-Noise and Distortion

(SINAD)
f

IN

fIN=10 MHz V 54 dB

Logic 1 Voltage VI 2.0 V
Logic 0 Voltage VI 0.8 V
Maximum Input Current Low VI -10 +10 µA
Maximum Input Current High VI -10 +10 µA
Input Capacitance V +5 pF

Logic 1 Voltage I
Logic 0 Voltage IOL = 1.6 mA VI 0.4 V
t

RISE

t

FALL

Output Enable to Data Output Delay 20 pF load, TA = +25 °C V 10 ns

Voltages OV

Currents AI
Power Dissipation VI 160 210 mW

, AVDD=DVDD=+5.0 V, VIN=0 to 4 V, fS=40 MSPS, V

MAX

TEST TEST SPT7863

=3.58 MHz VI 64 67 dB

=3.58 MHz VI 54 57 dB

=3.580 MHz V 70 dB

IN

= 0.5 mA VI 3.5 V

OH

15 pF load V 10 ns
15 pF load V 10 ns

50 pF load over temp. V 22 ns

IV 3.0 5.0 V
IV 4.75 5.0 5.25 V
IV 4.75 5.0 5.25 V
VI 17 21 mA
VI 16 21 mA

DV
AV

DI

DD
DD

DD
DD
DD

RHS

=4.0 V, V

=0.0 V, unless otherwise specified.

RLS

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.

SPT

TEST LEVEL

I

II

III
IV

V

VI

3 4/30/98

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.

SPT7863