HD49307 Three-Channel 8-bit D/A Converter November 1996 Description The HD49307 is a high-speed, low-power 8-bit D/A converter monolithic CMOS LSI which has three channels of clock and RGB data inputs. It is appropriate for applications which require three channel systems, such as digital TV and graphical displays. Functions • • • • • • • • Resolution: 8 bits Linearity error: ±0.2% Current output type: 13.3 mA × 3 channels Maximum conversion rate: 30 MHz (Min) Analogue output voltage range: V DD to VDD – 1 V Digital input voltage: TTL and CMOS level Power supply voltage: +5.0 V single Power consumption: 300 mW (Typ) HD49307 Pin Arrangement 2 HD49307 Pin Functions Pin No. Symbol Function 42, 45 to 51 R1 to R8 R channel digital signal input: R1 = MSB, R8 = LSB 52 to 54, 1 to 5 G1 to G8 G channel digital signal input: G1 = MSB, G8 = LSB 6, 8 to 12, 16, 17 B1 to B8 B channel digital signal input: B1 = MSB, B8 = LSB 38 Rout R channel analog signal output 36 Gout G channel analog signal output 33 Bout B channel analog signal output 19 RCLK R channel clock input 20 GCLK G channel clock input 21 BCLK B channel clock input 26 CBL Bypass capacitor pin 25 CBU Phase compensation capacitance pin 23, 41 DV DD Digital power supply 31, 39 AVSS Analog ground 32, 34, 37, 40 AVDD Analog power supply 22 DV SS Digital ground 30 VRREF Reference voltage input pin 7, 13 to 15, 18, 24, 27 to 29 35, 43, 44, 55, 56 NC No connections* 1 Note: 1. Do not connect anything to the NC pins. 3 HD49307 Output Function Table (V DD = 5 V, RL = 75 Ω, REX = 3.43 kΩ) Step B1 (MSB) B2 B3 B4 B5 B6 B7 B8 (LSB) Vout (V) 0 0 0 0 0 0 0 0 0 4.000 1 0 0 0 0 0 0 0 1 4.004 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 0 1 1 1 1 1 1 1 4.498 128 1 0 0 0 0 0 0 0 4.502 129 1 0 0 0 0 0 0 1 4.506 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254 1 1 1 1 1 1 1 0 4.996 255 1 1 1 1 1 1 1 1 5.000 4 HD49307 Block Diagram 5 HD49307 Absolute Maximum Ratings (Ta = 25°C) Item Symbol Rated value Unit Power supply voltage VDD +6.0 V Digital input voltage VIN –0.3 to VDD + 0.3 V Allowable dissipation PT 600 mW Operating temperature Topr 0 to +70 °C Storage temperature Tstg –55 to +125 °C Electrical Characteristics (Ta = 25°C, VDD = 5.0 V, RL = 75 Ω, REX = 3.43 kΩ) Item Symbol Resolution Min Typ Max Unit 8 8 8 bits Maximum conversion speed f CLK (Max) 30 — — MHz Minimum conversion speed f CLK (Min) — — 0.5 MHz Linearity error LE –0.2 — 0.2 LSB High level clock pulse width t WH 15 — — ns Low level clock pulse width t WL 15 — — ns Data setup time t SU 15 — — ns Data hold time th 15 — — ns Power supply voltage VDD 4.75 5.00 5.25 V Current dissipation I DD — 60 70 mA Digital input voltage VIH 2 — VDD V VIL 0 — 0.8 V Analog output Full scale VA (Full) 4.99 5.00 5.01 V voltage Zero scale VA (Zero) 3.95 4.00 4.05 V 6 Test conditions f CLK = 30 MHz HD49307 Timing Chart 7 HD49307 When using this document, keep the following in mind: 1. This document may, wholly or partially, be subject to change without notice. 2. All rights are reserved: No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without Hitachi’s permission. 3. Hitachi will not be held responsible for any damage to the user that may result from accidents or any other reasons during operation of the user’s unit according to this document. 4. Circuitry and other examples described herein are meant merely to indicate the characteristics and performance of Hitachi’s semiconductor products. Hitachi assumes no responsibility for any intellectual property claims or other problems that may result from applications based on the examples described herein. 5. No license is granted by implication or otherwise under any patents or other rights of any third party or Hitachi, Ltd. 6. MEDICAL APPLICATIONS: Hitachi’s products are not authorized for use in MEDICAL APPLICATIONS without the written consent of the appropriate officer of Hitachi’s sales company. Such use includes, but is not limited to, use in life support systems. Buyers of Hitachi’s products are requested to notify the relevant Hitachi sales offices when planning to use the products in MEDICAL APPLICATIONS. 8