HSADC85 APITECH | Alldatasheet

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Technical content

12-Bit, 10µS H ybrid ADC H S ADC85 Data Converter Line

FEATURES

  • –55ºC to +125ºC Operation
  • M IL-STD-883 Processing
  • 10 µS Conversion Time
  • Low Power, 1.32W (max)
  • Replacement for ADC85/84 and ADC-HX12B/HZ12B

DESCRIPTION

The HS ADC85 is specifically designed to replace the ADC581,. ADC85/84 and ADC-HX12B/HZ12B. Complete with internal clock, reference and input buffer amplifier, the HS ADC85 can also be used with an external clock for synchronization (see EXTERNAL CLOCK section under APPLICATIONS INFORM ATION). Conversion speeds of 10 µs for 12- Bit operation and 8 µs for 10-Bit operation allows the HS ADC85 to be used in a wide range of applications. Short cycle and internal clock rate may also be externally adjusted to provide faster conversion speeds at lower resolutions. Gain and offset can be externally trimmed to zero, providing full-scale accuracy of ±0.012% ±1/2 LSB. Data is obtainable in both parallel and serial form with corresponding clock and status signals. Digital input and output signals are DTL/TTL compatible. Other features include: Low Power — A 33% reduction in power dissipation allows the HS ADC85 to operate reliably at high temperatures without failure due to excessive package heating. Total power consumed is only 1.32 W maximum. Selectable Input Ranges — Input scaling resistors allow the selection of input ranges of ±2.5V, ±5V, ±10V, 0 to +5V or 0 to +10V. Reliability — Packaged in a 32-pin hermetically sealed case and utilizing advanced devices and laser- trimmed thin film resistors, the HS ADC85 is one of the most reliable analog-to-digital converters to date. Specified over the –55ºC to +125ºC temperature range, it has a low linearity drift specification of only ±2 ppm/ºC maximum. All “B” versions of the HS ADC85 series are fully screened and tested to M IL- STD-883 Rev. C, Level B requirements. STATUS SERIAL OUT SHORT CY CLE START CLOCK RATE CONTROL CLOCK OUT REF OUT BUFFER OUT BUFFER IN FUNCTIONAL DIAGRAM 131 2 3 4 5 6 7 8 9 10 11 12 LSB M SB M SB SAR DAC COM P CLOCK REF– ANA GND DIG GND +5V – 5V – 15V 27 24 25 23 22 GAIN 10V 20V BIPOLAR 165CedarHill Street,Marlborough,MA01752 Tel:508.485.6350 Fax: 508.485.5168 www.SpectrumMicrowave.com

(Typical @ +25ºC and rated power supply unless otherwise noted) SERIES HSA DC85 TY PE Successive A pproximation RESOLUTION 12-Bits A NA LOG INPUTS Bipolar Ranges ±2.5V . ±5V . ±10V Unipolar Ranges 0 to +5V , 0 to +10V Impedance (Direct Input) 300 / V olt Buffer A mplifier Impedance 100M (min) Bias Current 50 nA Settling Time1 2 µS DIGITA L INPUTS2 Start Positive Pulse 50nS W ide (min). Trailing Edge (“1” to “0”) Initiates Conversion3 Logic Loading 1 TTL Load External Clock Optional4 DIGITA L OUTPUTS2 Parallel Data Output Codes Unipolar Comp. Straight Bin. Bipolar Comp. Offset Bin., Comp, Two's Comp. Output Drive 2 TTL Loads (min) Serial (Non Return to Zero) Data Output Codes Comp. Straight Bin., Comp. Offset Bin. Output Drive 2 TTL Loads (min) Status Logic “1” During Conversion Status Output Drive 2 TTL Loads (min) Clock Out4 Output Drive 2 TTL Loads (min) Frequency 1.4 M Hz REFERENCE Internal +6.2V ±5% Ref Out 200 µA M aximum with no Degradation of Specs Drift ±10ppm/ºC (max) CONV ERSION TIM E/THROUGHPUT RA TE 8.8 µS, Typ; 10 µS, max/100 kHz A CCURA CY @ 25ºC Quantization ±1/2LSB Linearity ±0.012% of F.S.R. (max) Offset5 Unipolar ±0.05% of F.S.R. Bipolar ±0.1% of F.S.R.(max) Gain5 ±0.1% of F.S.R. M onotonicity No M issing Codes STA BILITY Linearity –25ºC to +85ºC ±1 ppm/ºC; ±2 ppm/ºC, (max) –55ºC to +125ºC ±2 ppm/ºC. (max) Scale Factor (Gain) –25ºC to +85ºC ±8 ppm/ºC; ±15 ppm/ºC, (max) –55ºC to +125ºC ±20 ppm/ºC, (max) Offset (Unipolar) –25ºC to +85ºC ±2 ppm/ºC; ±3 ppm/ºC, (max) –55ºC to +125ºC ±3 ppm/ºC. (max) Offset (Bipolar) –25ºC to +85ºC ±4 ppm/ºC; ±7 ppm/ºC. (max) –55ºC to +125ºC ±12 ppm/ºC, (max) Total Transfer A ccuracy –25ºC to +85ºC ±10 ppm/ºC; ±20 ppm/ºC. (max) –55ºC to +125ºC ±30 ppm/ºC, (max) HS ADC85 SERIES Continued on next page.

(Typical @ +25ºC and rated power supply unless otherwise noted) SERIES HS A DC85 POW ER SUPPLY Requirements +15V , Rated +14.25 to +15.75V @ 28 mA (max) –15V , Rated –14.25V to+15.75V @ 30 mA (max) +5V , Rated +4.75V to +5.25V @ 91 mA (max) Rejection Ratio +15V Supply ±0.005% F.S.R,/% V s –15V Supply ±0.005% F.S.R,/% V s +5V Supply ±0.002% F.S.R,/% V s Power Consumption 1.32W (max) TEM PERA TURE Operating –55ºC to +125ºC B V ersion ºC to 70ºC C V ersion M ECHA NICA L Case Style 32-Pin Hermetic M etal NOTES 1. For 20V step to 0.01% . Settling Time adds to Conversion Time when buffer is connected to input. 3. See TIM ING DIA GRA M under A PPLICA TIONS INFORM A TION. 4. HS A DC85 can accept external clock. See TIM ING DIA GRA M under A PPLICA TIONS INFORM A TION. 5. Externally adjustable, see OPTIONA L OFFSET A ND GA IN A DJUSTM ENTS under A PPLICA TIONS INFORM A TION. CA SE ENV ELOPE DIM ENSIONS 1.150 (29.21) M A X 0.900 (22.86) 0.220 (5.588) M IN 0.018 ±0.002 (0.457 ±0.050) 0.220 (5.588) M A X 1.750 (44.45) M A X 0.100 (2.540) TY P 0.10 (2.54) TOP V IEW RED DOT INDICA TES PIN 1 DIM ENSIONS INCHES (M M ) 0.10 (2.54) 1 32 16 17 PIN FUNCTION PIN FUNCTION

1 BIT12(LSB) 32 SERIA L OUT

2 BIT 11 31 –15V

3 BIT 10 30 BUFFER IN

4 BIT 9 29 BUFFER OUT

5 BITS 28 +15V

6 BIT 7 27 GA IN A DJ. 7 BIT 6 26 A NA LOG GND.*

8 BIT 5 25 20V RA NGE

9 BIT 4 24 10V RA NGE

10 BIT 3 23 BIPOLA R OFFSET

11 BIT 2 22 COM PA RA TOR IN

12 BIT 1(M SB) 21 STA RT

13 BIT 1 (M SB) 20 STA TUS

14 SHORT CY CLE 19 CLOCK OUT

15 DIGITA L GND. 18 REF OUT 16 +5V 17CLOCK RA TE CONTROL* *

  • DIGITA L GND (Pin 15), and A NA LOG GND (Pin 26) should be tied together as close to the unit as possible. If these grounds must be run separately, use a wide conductor pattern and a nonpolarized 0.01 jiF to 0.1 p,F bypass capacitor between the two. * * See A PPLICA TIONS INFORM A TION for connections. PIN A SSIGNM ENTS HS ADC85 SERIES