Features

••

Monolithic CMOS A/D Converters

Microprocessor Compatible

Parallel and Serial Output

Inherent Track/Hold Input

••

True 12, 14 and 16-Bit Precision

••

Conversion Times:

CS5016 16.25

CS5014 14.25

CS5012A 7.20

••

Self Calibration Maintains Accuracy

Over Time and Temperature

••

Low Power Dissipation: 150 mW

••

Low Distortion

General Description

The CS5012A/14/16 are 12, 14 and 16-bit monolithic

analog to digital converters with conversion times of

7.2

s, 14.25

s and 16.25

s. Unique self-calibration cir-

cuitry insures excellent linearity and differential non-

linearity, with no missing codes. Offset and full scale

errors are kept within 1/2 LSB (CS5012A/14) and

1 LSB (CS5016), eliminating the need for calibration.

Unipolar and bipolar input ranges are digitally select-

able.

The pin compatible CS5012A/14/16 consist of a DAC,

conversion and calibration microcontroller, oscillator,

comparator, microprocessor compatible 3-state I/O,

and calibration circuitry. The input track-and-hold, in-

herent to the devices’ sampling architecture, acquires

the input signal after each conversion using a fast

slewing on-chip buffer amplifier. This allows throughput

rates up to 100 kHz (CS5012A), 56 kHz (CS5014) and

50 kHz (CS5016).

An evaluation board (CDB5012/14/16) is available

which allows fast evaluation of ADC performance.

ORDERING INFORMATION:

Pages 2-45, 2-46, & 2-47

MAR ’95

DS14F6

2-7

Crystal Semiconductor Corporation

P.O. Box 17847, Austin, TX 78760

(512) 445 7222 FAX: (512) 445 7581

16, 14 & 12-Bit, Self-Calibrating A/D Converters

Semiconductor Corporation

CS5016 CS5014 CS5012A

D10

D11

D12

D13

D14

D15 (MSB)

D4 (LSB) CS5012A

D2 (LSB) CS5014

D0 (LSB) CS5016

SCLKEOT EOC SDATA

37 38 39 40

CLKIN

CLOCK

GENERATOR

INTRLV

RST

3221

HOLD

3324

CAL

BP/UP

REFBUF

AGND

VREF

AIN

CHARGE

REDISTRIBUTION

DAC

COMPARATOR

VA+ VA- VD+ VD- DGND TST

25 30 11 36 10 31

CONTROL

CALIBRATION

MEMORY

MICROCONTROLLER

STATUS REGISTER



Crystal Semiconductor Corporation 1995

CS5012A

CS5012A ANALOG CHARACTERISTICS (T

= T

MIN

to T

MAX

; VA+, VD+ = 5V;

VA-, VD- = -5V; VREF = 2.5V to 4.5V; f

clk

= 6.4 MHz for -7, 4 MHz for -12; Analog Source Impedance = 200Ω)

CS5012A-K CS5012A-B CS5012-T

Parameter* Min Typ Max Min Typ Max Min Typ Max Units

Specified Temperature Range 0 to +70 -40 to +85 -55 to +125 °C

Accuracy

Linearity Error (Note 1)

Drift (Note 2)

±1/4

±1/8

±1/2 ±1/4

±1/8

±1/2 ±1/4

±1/8

±1/2

LSB

∆LSB

Differential Linearity (Note 1)

Drift (Note 2)

±1/4

±1/32

±1/2 ±1/4

±1/32

±1/2 ±1/4

±1/32

±1/2

LSB

∆LSB

Full Scale Error (Note 1)

Drift (Note 2)

±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2 ±1/4

±1/8

±1/2

LSB

∆LSB

Unipolar Offset (Note 1)

Drift (Note 2)

±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2

LSB

∆LSB

Bipolar Offset (Note 1)

Drift (Note 2)

±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2

LSB

∆LSB

Bipolar Negative Full-Scale Error(Note 1)

Drift (Note 2)

±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2 ±1/4

±1/16

±1/2

LSB

∆LSB

Total Unadjusted Error (Note 1)

Drift (Note 2)

±1/4

LSB

∆LSB

Dynamic Performance (Bipolar Mode)

Peak Harmonic or (Note 1)

Spurious Noise

Full Scale, 1 kHz Input

Full Scale, 12 kHz Input

Total Harmonic Distortion 0.008 0.008 0.008 %

Signal-to-Noise Ratio (Note 1)

1 kHz, 0 dB Input

1 kHz, -60 dB Input

72 73

Noise (Note 3)

Unipolar Mode

Bipolar Mode

µV

rms

µV

rms

Notes: 1. Applies after calibration at any temperature within the specified temperature range.

2. Total drift over specified temperature range since calibration at power-up at 25 °C

3. Wideband noise aliased into the baseband. Referred to the input.

* Refer to

Parameter Definitions

(immediately following the pin descriptions at the end of this data sheet).

Specifications are subject to change without notice.

2-8 DS14F6

CS5012A ANALOG CHARACTERISTICS (continued)

CS5012A-K CS5012A-B CS5012-T

Parameter* Min Typ Max Min Typ Max Min Typ Max Units

Specified Temperature Range 0 to +70 -40 to +85 -55 to +125 °C

Analog Input

Aperture Time 25 25 25 ns

Aperture Jitter 100 100 100 ps

Input Capacitance (Note 4)

Unipolar Mode CS5012

CS5012A

Bipolar Mode CS5012

CS5012A

275

103

165

375

137

220

275

103

165

375

137

220

275

103

165

375

137

220

Conversion & Throughput

Conversion Time -7 (Notes 5 and 6)

-12

7.2

12.25

7.2

12.25 12.25

µs

Acquisition Time -7 (Note 6)

-12

2.5

3.0

2.8

3.75

2.5

3.0

2.8

3.75 3.0 3.75

µs

Throughput -7 (Note 6)

-12

100

62.5

100

62.5 62.5

kHz

Power Supplies

DC Power Supply Currents (Note 7)

(CS5012) I

(CS5012A) I

-12

-3

-19

7.5

-6

-12

-3

-19

7.5

-6

-12

-3

-19

-6

Power Dissipation (Note 7) 150 250 150 250 150 250 mW

Power Supply Rejection (Note 8)

Positive Supplies

Negative Supplies

Notes: 4. Applies only in track mode. When converting or calibrating, input capacitance will not exceed 15 pF.

5. Measured from falling transition on

HOLD to falling transition on EOC.

6. Conversion, acquisition, and throughput times depend on CLKIN, sampling, and calibration conditions.

The numbers shown assume sampling and conversion is synchronized with the CS5012A/14/16 ’s

conversion clock, interleave calibrate is disabled, and operation is from the full-rated, external clock.

Refer to the section

Conversion Time/Throughput

for a detailed discussion of conversion timing.

7. All outputs unloaded. All inputs CMOS levels.

8. With 300 mV p-p, 1 kHz ripple applied to each analog supply separately in bipolar mode. Rejection

improves by 6 dB in the unipolar mode to 90 dB. Figure 13 shows a plot of typical power supply

rejection versus frequency.

CS5012A

DS14F6 2-9

Part #	CS5014-BP14
Description	A/D Converter 16, 14 & 12-BitSelf-Calibrating, 40pin PDip
Category	CONVERTER
Availability	Out of Stock
Qty	0

CS5014-BP14

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