ADC-228AMM

www.murata-ps.com ADC-228A 8-Bit, 20MHz, Complete Flash A/D Converter PRODUCT OVERVIEW The ADC-228A combines analog front-end circuitry and a flash A/D converter to digitize high-speed analog signals at a rate of 20 million samples per second. The ADC-228A contains an 8-bit, 20MHz, flash A/D, a wideband analog input buffer, a precision voltage reference, temperature compensation circuitry, reference trims, and a three-state output buffer in a 24-pin package. The ADC-228A offers significant savings by combining all of the circuitry in a single package. Valuable board real estate is saved, and design time and manufacturing costs are reduced. The ADC-228A is housed in a 24-pin ceramic DDIP package and is available in the commercial, 0 to +70°C, or military, –55 to +125°C, temperature ranges. A MIL-STD-883 version is also available. Operation is from ±15V and +5V power supplies. Pin 1 INPUT/OUTPUT CONNECTIONS FUNCTION Pin +5V SUPPLY 24 GROUND +5V REFERENCE OUT GROUND ANALOG INPUT GROUND GROUND NO CONNECTION NO CONNECTION –15V SUPPLY CS1 CS2 23 22 21 20 19 18 17 16 15 14 13 FUNCTION BIT 8 (LSB) BIT 7 BIT 6 BIT 5 NO CONNECTION +15V SUPPLY CLOCK INPUT BIT 4 BIT 3 BIT 2 BIT 1 (MSB) NO CONNECTION FEATURES ■ ■ ■ ■ ■ ■ ■ 2 3 4 5 6 7 8 9 10 11 12 8-Bit flash A/D converter 20MHz sampling rate Complete support circuitry Low power, 900mW Sample-hold not required Three-state outputs MIL-STD-883 versions CS1 11 CS2 12 NO CONNECTION 8 NO CONNECTION 9 CLOCK 18 ANALOG INPUT 5 INPUT BUFFER +15V SUPPLY 19 –15V SUPPLY 10 GROUND 7 GROUND 6 GROUND 4 GROUND 2 +5V SUPPLY 1 VOLTAGE REFERENCE NETWORK LINEARIZATION & TEMPERATURE COMPENSATION NETWORK 8-BIT 20MHz FLASH CONVERTER TRI-STATE BUFFER 13 NO CONNECTION 20 NO CONNECTION 14 BIT 1 (MSB) 15 BIT 2 16 BIT 3 17 BIT 4 21 BIT 5 22 BIT 6 23 BIT 7 24 BIT 8 (LSB) 3 +5V REF. OUT 　 Figure 1. Functional Block Diagram For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: data.acquisition@murata-ps.com, tel: +1 508 339 3000 MDA_ADC-228A.B01 Page 1 of 4 ADC-228A 8-Bit, 20MHz, Complete Flash A/D Converter ABSOLUTE MAXIMUM RATINGS PARAMETER Power Supply Voltage, Pin 1 Pin 19 Pin 10 –0.5 to +5.5V LIMITS –0.3 to +7V –0.3 to +18V +0.3 to –18V –3.8 to +6.6V –0.5 to +5.5V (short circuit protected to ground) +300°C Total Harm. Distortion, –0.5dB DC to 2.5 MHz 2.5 MHz to 5 MHz 5 MHz to 10 MHz Signal-to-Noise Ratio and Distortion, –0.5dB DC to 2.5 MHz 2.5 MHz to 5 MHz 5 MHz to 10 MHz Signal-to-Noise Ratio w/o Distortion, –0.5 dB DC to 2.5 MHz 2.5 MHz to 5 MHz 5 MHz to 10 MHz Effective Bits, –0.5dB DC to 2.5 MHz 2.5 MHz to 5 MHz 5 MHz to 10 MHz Input Bandwidth Large Signal (–3dB) Small Signal (–20dB) Power Supply Range +15V Supply –15V Supply +5V Supply Power Supply Current +15V Supply –15V Supply +5V Supply Power Dissipation ±15V, +5V Nominal Operating Temp. Range, Case ADC-228AMC ADC-228AMM, ADC-228A/883 Storage Temp. Range Package Type Weight PERFORMANCE Gain error Full Scale Absolute Accuracy Differential Gain ➁ Differential Phase ➁ Aperture Delay Aperture Jitter No Missing Codes Power Supply Rejection MIN. — — — — — — TYP. ±0.5 ±0.5 2 1 8 50 MAX. ±1.5 ±1.5 — — — — UNITS LSB LSB % deg. ns ps Digital Inputs, Pins 8,9,11,12,18 Analog Input, Pin 5 Digital Outputs Lead Temp. (10 seconds) Over the operating temperature range ±0.02% FSR/%VS maximum DYNAMIC PERFORMANCE FUNCTIONAL SPECIFICATIONS (Apply over the operating temperature range with 20MHz clock and ±15V and +5V power supply voltages, unless otherwise specified.) ANALOG INPUTS Single-Ended, Non-Isolated Input Range, dc-20MHz Input Resistance Input Capacitance Logic Levels Logic 1 Logic 0 Logic Loading Logic 1 Logic 0 Clock Pulse Widths "High" "Low" Coding Resolution Logic Levels Logic 1 Logic 0 Logic Loading Logic 1 Logic 0 Output Data Valid Delay From Rising Edge Output Hold Time Sampling Rate ➀ Differential Linearity Code Transitions, +25°C 0 to +70°C –55 to +125°C Integral Linearity, +25°C End-point Best-fit Line Over Temperature End-point Best-fit Line Zero-Scale Offset Code "0" to "1" Transition +25°C –55 to +125°C — — — –55 –49 –39 –53 –44 –36 dB dB dB MIN. 0 1.95 — TYP. — 2 5 MAX. +5.0 — 10 UNITS Volts kΩ pF 44 41 35 49 46 38 — — — dB dB dB DIGITAL INPUTS +2.0 — — — 20 20 — — — — — — — +0.8 +160 –0.5 — — Volts Volts µA mA ns ns 45 44 42 7.1 6.8 5.6 15 40 48 49 45 7.75 7.4 6.1 — — — — — — — — — — dB dB dB Bits Bits Bits MHz MHz DIGITAL OUTPUTS Straight Binary 8 Bits +2.4 — — — — 6 — — — — — — — — +0.4 –1 +1 40 — — Volts Volts mA mA ns ns MHz POWER SUPPLY +11 –11 +4.75 — — — — +15 –15 +5 +12 –13 +70 0.7 +15.75 –15.75 +5.25 +20 –20 +80 0.9 Volts Volts Volts mA mA mA Watts PERFORMANCE 20 PHYSICAL/ENVIRONMENTAL 0 to +70°C –55 to +125°C –65 to +150°C 24-pin, ceramic DDIP 0.3 ounces (8.5 grams) — — — — — — — ±0.5 ±0.5 ±0.5 ±0.5 ±0.35 — — ±0.75 ±0.75 ±0.85 ±1 ±0.75 ±1.75 ±1 LSB LSB LSB LSB LSB LSB LSB — — ±0.5 ±0.5 ±1 ±1.5 LSB LSB Footnotes: ➀ At full power input and chip selects enabled. ➁ For 10-step, 40 IRE NTSC ramp test. www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADC-228A.B01 Page 2 of 4 ADC-228A 8-Bit, 20MHz, Complete Flash A/D Converter TECHNICAL NOTES 1. Rated performance requires using good high-frequency techniques. The analog and digital ground pins are connected to each other internally. Avoid ground related problems by connecting the grounds to one point, the ground plane beneath the converter. Due to the inductance and resistance of the power supply return paths, return the analog and digital ground separately to the power supplies. 2. Bypass all the analog and digital supplies and the +5V REFERENCE (pin 3) to ground with a 4.7µF, 25V tantalum electrolytic capacitor in parallel with a 0.1µF ceramic capacitor. Table 1. ADC-228A Unipolar Output Coding ANALOG INPUT +4.96V +3.75V +2.50V +1.25V +0.02V 0.00V CODE +FS – 1 LSB + 3/4 FS + 1/2 FS + 1/4 FS + 1 LSB ZERO STRAIGHT BIN. 1111 1110 1100 0000 1000 0000 0100 0000 0000 0001 0000 0000 Table 2. Chip Select Truth Table CS2 Pin 12 0 0 1 1 CS1 Pin 11 0 1 0 1 Bits 1-8 Three State Mode Three State Mode Data Outputted Three State Mode CLOCK SAMPLE N SAMPLE N+1 OUTPUT DELAY SAMPLE N+2 DIGITAL OUTPUT OUTPUT HOLD TIME DATA N DATA N+1 DATA N+2 Figure 2. ADC-228A Timing Diagram +5V 0.1μF 4.7μF + 1 –15V 0.1μF 10 4.7μF + 14 15 16 17 B1 (MSB) B2 B3 B4 B5 B6 B7 B8 (LSB) NO CONNECTION +5V REFERENCE OUT 0.1μF CS1 11 21 ADC-228A CS1 12 CLOCK 18 ANALOG INPUT VIN 5 19 0.1μF 2, 4, 6, 7 22 23 24 8, 9, 13, 20 3 51Ω 9kΩ *Optional + 4.7μF * Use optional resistor only if amp is not used to drive input. R = V /1.667mA EE + 4.7μF +15V Figure 3. ADC-228A Typical Connections www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 MDA_ADC-228A.B01 Page 3 of 4 ADC-228A 8-Bit, 20MHz, Complete Flash A/D Converter 1.31 MAX. (33.27) Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) ±0.010 (±0.254) 3 place decimal (.XXX) ±0.005 (±0.127) 0.80 MAX. (20.32) 1 12 Lead Material: Kovar alloy Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 24 13 0.100 TYP. (2.540) 1.100 (27.940) 0.235 MAX. (5.969) 0.200 MAX. (5.080) 0.010 –0.001 (0.254) 0.190 MAX. (4.826) 0.018 ±0.002 (0.457) 0.100 (2.540) 0.040 (1.016) +0.002 SEATING PLANE 0.025 (0.635) 0.600 ±0.010 (15.240) 0.100 (2.540) ORDERING INFORMATION MODEL ADC-228AMC ADC-228AMM ADC-228A/883 * TEMPERATURE RANGE 0 to +70°C –55 to +125°C –55 to +105°C SAMPLING RATE 20MSPS 20MSPS 15MSPS Receptacle for PC board mounting can be ordered through AMP Inc., part # 3-331272-8 (component lead socket), 24 required. Contact DATEL for 883 product specifications * DATEL's initial qualification was done at 15MSPS and as a Mil-STD-883 Class G product per customer request. Mil-STD-883 Class G allows for a reduced temperature range (–55°C to +105°C) that applies to this device. Contact DATEL if a 20MSPS rate or a Mil-STD-883 Class H (–55°C to +125°C) temperature range is desired. USA: Canada: UK: France: Germany: Japan: China: Singapore: Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com München, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED 03/20/09 Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. © 2009 Murata Power Solutions, Inc. www.murata-ps.com MDA_ADC-228A.B01 Page 4 of 4