Burr Brown Corporation ADC76KG, ADC76JG, ADC76BG, ADC76AG Datasheet

16-Bit

Successive Approx.

Register (SAR)

16-Bit D/A
Converter

Reference

Clock

–
+

Parallel
Digital
Output

Short Cycle
Convert Command

}

Input Range
Select

Comparator In

Clock Rate Control
Clock Out
Status
Serial Out

16-Bit

ANALOG-TO-DIGITAL CONVERTER

International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706

Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

DESCRIPTION

The ADC76 is a high quality, 16-bit successive ap­proximation analog-to-digital converter. The ADC76
uses state-of-the-art laser-trimmed IC thin-film resis­tors and is packaged in a hermetic 32-pin dual-in-line
package. The converter is complete with internal ref­erence, short cycling capabilities, serial output, and
thin-film scaling resistors, which allow selection of
analog input ranges of ±2.5V, ±5V, ±10V, 0 to +5V,
0 to +10V and 0 to +20V.

It is specified for operation over two temperature
ranges: 0°C to +70°C (J, K) and –25°C to +85°C (A, B).

Data is available in parallel and serial form with
corresponding clock and status output. All digital
inputs and outputs are TTL-compatible.

Power supply voltages are ±15VDC and +5VDC.

ADC76

FEATURES

● 16-BIT RESOLUTION

● LINEARITY ERROR:

±0.003% max (KG, BG)

● NO MISSING CODES GUARANTEED

FROM –25

°C TO +85°C

● 17

µs CONVERSION TIME (16-Bit)

● SERIAL AND PARALLEL OUTPUTS

®

©

1990 Burr-Brown Corporation PDS-1063A Printed in U.S.A. December, 1993

®

ADC76 2

SPECIFICATIONS

ELECTRICAL

At +25°C, and rated power supplies, unless otherwise noted.

ADC76J, K ADC76A, B

MODEL MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 16 * Bits
ANALOG INPUTS

Voltage Ranges: Bipolar ±2.5, ±5, ±10 * V

Unipolar 0 to +5, 0 to +10 * V

0 to +20 *

Impedance (Direct Input)

0 to +5V, ±2.5V 2.5 * kΩ
0 to +10V, ±5.0V 5 * kΩ
0 to +20V, ±10V 10 * kΩ

DIGITAL INPUTS

(1)

Convert Command Positive pulse 50ns wide (min) trailing edge (“1” to “0” initiates conversion)
Logic Loading 1 * TTL Load

TRANSFER CHARACTERISTICS
ACCURACY

Gain Error

(2)

±0.1 ±0.2 * * %

Offset Error: Unipolar

(2)

±0.05 ±0.1 * * % of FSR

(3)

Bipolar

(2)

±0.1 ±0.2 * * % of FSR

Linearity Error:K, B ±0.003 * % of FSR

J, A ±0.006 * % of FSR
Inherent Quantization Error ±1/2 * LSB
Differential Linearity Error ±0.003 * % of FSR
Noise (3σ, p-p) ±0.001 ±0.003 * * % of FSR

POWER SUPPLY SENSITIVITY

±15VDC 0.003 * % of FSR/%V

S

+5VDC 0.001 * % of FSR/%V

S

CONVERSION TIME

(4)

14 Bits 15 * µs
15 Bits 16 * µs
16 Bits 17 * µs

WARM-UP TIME 5* Min
DRIFT

Gain ±15 * ppm/°C
Offset: Unipolar ±2 ±4 * * ppm of FSR/°C

Bipolar ±10 * ppm of FSR/°C
Linearity ±2 ±3 * * ppm of FSR/°C
No Missing Codes Temp Range

J, A (13-bit) 0 +70 –25 +85 °C
K, B (14-bit) 0 +70 –25 +85 °C

OUTPUT DIGITAL DATA

(All codes complementary)
Parallel

Output Codes

(5)

: Unipolar CSB *

Bipolar COB, CTC

(6)

*

Output Drive 2 * TTL Loads

Serial Data Code (NRZ) CSB, COB *

Output Drive 2 * TTL Loads

Status Logic “1” during conversion *

Status Output Drive 2 * TTL Loads

Internal Clock: Clock Output Drive 2 * TTL Loads

Frequency

(7)

933 1400 * * kHz

POWER SUPPLY REOUIREMENTS

Power Consumption 0.655 * W
Rated Voltage: Analog ±11.4 ±15 ±16***VDC

Digital +4.75 +5 +5.25 * * * VDC

Supply Drain: +15VDC +10 +15 * * mA

–15VDC –28 –35 * * mA
+5VDC +17 +20 * * mA

TEMPERATURE RANGE

Specification 0 +70 –25 +85 °C
Storage –55 +125 * * °C

*Specification same as ADC76J, K.
NOTES: (1) CMOS/TTL compatible, i.e., Logic “0” = 0.8V, max, Logic “1” = 2.0V, min for inputs. For digital outputs Logic “0” = 0.4V, max, Logic “1’ = 2.4V, min.
(2) Adjustable to zero. See “Optional External Gain and Offset Adjustment” section. (3) FSR means Full Scale Range. For example, unit connected for ±10V range
has 20V FSR. (4) Conversion time may be shortened with “Short Cycle” set for lower resolution and with use of Clock Rate Control. See “Optional Conversion Time
Adjustment” section. The Clock Rate Control (pin 23) should be connected to Digital Common for specified conversion time. Short Cycle (pin 32) should be left open
for 16-bit resolution or connected to the n + 1 digital output for n-bit resolution. For example, connect Short Cycle to Bit 15 (pin 15) for 14-bit resolution. For resolutions
less than 16 bits, pin 32 should also be tied to +5V through a 2kΩ resistor. (5) See Table I. CSB = Complementary Straight Binary, COB = Complementary Offset
Binary, CTC = Complementary Two’s Complement. (6) CTC coding obtained by inverting MSB (pin 1). (7) Adjustable with Clock Rate Control from approximately
933kHz to 1.4MHz.

®

ADC763

LINEARITY ERROR

MODEL max (% of FSR) TEMPERATURE RANGE 1-24 25-99 100-249

ADC76AG ±0.006 –25°C to +85°C
ADC76BG ±0.003 –25°C to +85°C
ADC76JG ±0.006 0°C to +70°C
ADC76KG ±0.003 0°C to +70°C

PIN CONFIGURATION

Top View DIP

PACKAGE INFORMATION

PACKAGE DRAWING

MODEL PACKAGE NUMBER

(1)

ADC76JG 32-Pin Hermetic DIP 172-5
ADC76KG 32-Pin Hermetic DIP 172-5
ADC76AG 32-Pin Hermetic DIP 172-5
ADC76BG 32-Pin Hermetic DIP 172-5

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.

ABSOLUTE MAXIMUM SPECIFICATIONS

+VCC to Common .................................................................. 0V to +16.5V

–V

CC

to Common .................................................................. 0V to –16.5V

+V

DD

to Common ....................................................................... 0V to +7V

Analog Common to Digital Common ............................................... ±0.5V

Logic Inputs to Common ........................................................... 0V to V

DD

Maximum Power Dissipation ....................................................... 1000mW

Lead Temperature (soldering, 10s)................................................. 300°C

ORDERING INFORMATION

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

16-Bit D/A Converter

16-Bit SAR

5kΩ5kΩ

6.3kΩ

Reference

Clock

MSB Bit 1 1

Bit 2 2
Bit 3 3
Bit 4 4
Bit 5 5
Bit 6 6
Bit 7 7
Bit 8 8

Bit 9 9
Bit 10 10
Bit 11 11
Bit 12 12

(LSB for 13 Bits) Bit 13 13

Bit 15 15

(LSB for 14 Bits) Bit 14 14

Bit 16 16

–
+

Comparator

32 Short Cycle
31 Convert Command
30 +5V Supply
29 Gain Adjust
28 +15V Supply
27 Comparator In
26 Bipolar Offset
25 10V
24 20V
23 Clock Rate Control
22 Analog Common

(1)

21 –15V Supply
20 Clock Out

18 Status

19 Digital Common

17 Serial Out

NOTE: (1) Metal lid is connected
to pin 22 (Analog Common).