LTC74 リードバック付きクワッド /4/6 ビット電圧出力 SoftSpan DAC 特長 6 V 5V V V 5V V.5V.5V 7.5V DNL INL LTC74-4/LTC74- / < nv sec 出力が ±5mA をドライブ ピン互換の 4 および 6 ビット デバイス パワーオン時またはクリアにより V にリセット 44 ピン SSOP パッケージ アプリケーション プロセス制御と産業用オートメーション 直接デジタル波形生成 ソフトウェア制御の利得調整 自動テスト装置 概要 LTC 74-6/LTC74-4/LTC74- V 5V 5V 5V 6/4/ SoftSpan DAC SoftSpan DAC SPI 6 4 INL LTC74-6 DNL 4 LTC74 Seep DAC L LT LTC LTM Linear Technoogy および Linear のロゴはリニアテクノロジー社の登録商標です SoftSpan はリニアテクノロジーの商標です 他のすべての商標はそれぞれの所有者に所有権があります 簡略ブロック図 VOSB 4 CB 9 RFBB 7 OUTB 8 AGNDB 4 VOSA CA RFBA OUTA AGNDA 4 5 7 6 AGND GND V + REFM REFG REF REF REFG REFM 4 44 4 4 DAC B DAC A 4 V DD CS/LD SCK SDI 4 CLR 9 5 LDAC RFLAG SRO V + 5 V,8,5,,,6 DAC C DAC D 7 8 9 6 9 8 6 7 74 BD VOSC CC RFBC OUTC AGNDC VOSD CD RFBD OUTD AGNDD INL ()..8.6.4...4.6.8. LTC74-6 INL ±V RANGE ALL 4 DACS SUPERIMPOSED 684 768 CODE 495 6555 74 TAb 74fc
LTC74 絶対最大定格 Note ピン配置 全電源電圧 V + V + ~V....V~6V V + V + REF REF REFM REFM OUTx RFBx V OSx ~GND AGND AGNDx Cx REFG REFG...8V GND AGND AGNDx Cx REFG REFG~V + V + V REF REF REFM REFM OUTx RFBx V OSx...8V OUTA RFBA V OSA OUTB RFBB VOSB REF REFM~GND AGND... V.V~V + +.V OUTC RFBC V OSC OUTD RFBD V OSD REF REFM~GND AGND... V.V~V + +.V V DD デジタル入力 / 出力 ~GND....V~7V デジタル入力 / 出力 ~V DD...V GND AGNDx REFG REFG~AGND... ±.V Cx~AGNDx... ±.V V ~ すべてのピン...V 最大接合部温度...5 動作温度範囲 LTC74C... ~7 LTC74I... 4 ~85 保存温度範囲... 65 ~5 リード温度 ( 半田付け 秒 )... V REFG AGNDA VOSA CA OUTA RFBA V LDAC CS/LD SDI SRO SCK CLR V RFBD OUTD CD VOSD AGNDD REFG V 4 5 6 7 8 9 4 5 6 7 8 9 TOP VIEW 44 4 4 4 4 9 8 7 6 5 4 9 8 7 6 5 4 REFM REF V + AGNDB VOSB CB OUTB RFBB V RFLAG V DD GND AGND V RFBC OUTC CC VOSC AGNDC V + REF REFM GW PACKAGE 44-LEAD PLASTIC SSOP T JMAX = 5 C, θ JA = 8 C/W 発注情報 LTC74CGW-6#PBF LTC74CGW-6#TRPBF LTC74CGW-6 44-Lead Pastic SSOP C to 7 C LTC74IGW-6#PBF LTC74IGW-6#TRPBF LTC74IGW-6 44-Lead Pastic SSOP 4 C to 85 C LTC74CGW-4#PBF LTC74CGW-4#TRPBF LTC74CGW-4 44-Lead Pastic SSOP C to 7 C LTC74IGW-4#PBF LTC74IGW-4#TRPBF LTC74IGW-4 44-Lead Pastic SSOP 4 C to 85 C LTC74CGW-#PBF LTC74CGW-#TRPBF LTC74CGW- 44-Lead Pastic SSOP C to 7 C LTC74IGW-#PBF LTC74IGW-#TRPBF LTC74IGW- 44-Lead Pastic SSOP 4 C to 85 C さらに広い動作温度範囲で規定されるデバイスについては 弊社または弊社代理店にお問い合わせください 非標準の鉛ベース仕様の製品の詳細については 弊社または弊社代理店にお問い合わせください 鉛フリー仕様の製品マーキングの詳細については http://www.inear-tech.co.jp/eadfree/ をご覧ください テープアンドリールの仕様の詳細については http://www.inear-tech.co.jp/tapeandree/ をご覧ください 74fc
電気的特性 T A = 5 V = V = 5V V = 5V V DD = 5V REF = REF = 5V AGND = AGNDx = REFG = REFG = GND = V SYMBOL PARAMETER CONDITIONS Accuracy LTC74 LTC74- LTC74-4 LTC74-6 MIN TYP MAX MIN TYP MAX MIN TYP MAX Resoution 4 6 Bits Monotonicity 4 6 Bits INL Integra Noninearity ± ± ± DNL Differentia Noninearity ± ± ± GE Gain Error ±.5 ± ± ±5 ±4 ± Gain Temperature Gain/ Temperature ± ± ± ppm/ C Coefficient V OS Unipoar Zero-Scae Error BZE PSRR V OS Temperature Coefficient Bipoar Zero Error Power Suppy Rejection Ratio Anaog Outputs (Note 4) Setting Time I SC Output Swing Load Current Span = V to 5V, T A = 5 C Span = V to V, T A = 5 C Span = V to 5V Span = V to V V to 5V Range V to V Range A Bipoar Ranges V DD = 5V ±% (Note ) V DD = V ±% (Note ) V to V Range, Code = ±% (Note ) V + /V = ±5V ±%, V REF = V (Note ) V to 5V Range, 5V Step, to ± V to V or ±5V Range, V Step, to ± ±V Range, V Step, to ±, V REF = ±7.5V, V to V Range, I LOAD = ±ma (Note ) V + /V = ±5V, V REF = ±.5V, V to V Range, I LOAD = ±.5mA (Note ) V + /V = ±.8V to ±6.5V, V REF = ±5V, V to V Range, V OUT = ±V (Note ) V + /V = ±4.5V to ±6.5V, V REF = ±V, V to V Range, V OUT = ±4V (Note ) Load Reguation,, V to V Range, Code =, ±5mA Load (Note ) V + /V = ±5V, V REF = V, V to V Range, Code =, ±ma Load (Note ) Output Impedance Short-Circuit Current, V to V Range, Code =, ±5mA Load V + /V = ±6.5V,, ±V Range Code =, V OUT Shorted to V + (Note ) Code = Fu Scae, V OUT Shorted to V V + /V = ±5.5V, V REF = V, ±V Range Code =, V OUT Shorted to V + (Note ) Code = Fu Scae, V OUT Shorted to V ±8 ± ±4 ±5 ± ± ±4 ±6 ± ± ±.5 ± ± ±. ±.6 ±. ±. 5 8 ±.6 ±.5 ± 8 ± ±4 ±5 ± ± ±4 ±6 ± ± ±.5 ± ±.5 ±. ±.5 ±.5 ±..5 5.5 9 ±.5 ±. ±8 ± ±4 ±5 ± ± ±4 ±6 ± ± ± ±8 ± ±.5 ±. ±. ±.4 4 6 ±. ±.5 UNITS μv μv μv μv μv/ C μv/ C /V /V /V /V 4. 4. 4. 4. 4. 4. V 4.5 4.5 4.5 4.5 4.5 4.5 V ±5 ±4 ± ±.7 ±5 ±4 ± ±.7 ±5 ±4 ± ±.7 µs µs µs ma ma ma ma ±.5 ±. ±.4 /ma ±. ±. ±.5 /ma.5.6.6 Ω 6 6 8 8 6 6 8 8 6 6 8 ma ma 8 ma ma 74fc
LTC74 電気的特性 T A = 5 C V = V = 5V V = 5V V DD = 5V REF = REF = 5V AGND = AGNDx = REFG = REFG = GND = V LTC74- LTC74-4 LTC74-6 SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS SR Sew Rate R L = k, (Note ) R L = k, V + /V = ±5V (Note )...8...8...8 V/µs V/µs Capacitive Load Driving Within Maximum Load Current pf T A = 5 C V = V = 5V V = 5V V DD = 5V REF = REF = 5V AGND = AGNDx = REFG = REFG = GND = V SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Reference Inputs REF, REF Input Votage, V to 5V Span (Note ) 4.5 4.5 V Resistances R REF, R REF Reference Input Resistance 5 7 kω R FBx Output Feedback Resistance 7 kω R VOSX Offset Adjust Input Resistance 7 kω AC Performance (Note 4) Gitch Impuse V to 5V Range, Midscae Transition nv-s Crosstak V Step on V OUTA DAC B: V to 5V Range, Fu Scae DAC B: V to V Range, Fu Scae nv-s nv-s Digita Feedthrough ±V Range, Midscae. nv-s Mutipying Feedthrough Error V to V Range, V REF = ±5V, khz Sine Wave.5 mv P-P 4 Mutipying Bandwidth Output Noise Votage Density Output Noise Votage Span = V to 5V, Fu Scae Span = V to V, Fu Scae khz Span = V to 5V, Midscae Span = V to V, Midscae.Hz to Hz Span = V to 5V, Midscae Span = V to V, Midscae 5 5.8. khz khz µv/ Hz µv/ Hz Power Suppy I DD Suppy Current, V DD Digita Inputs = V or V DD.5 µa I S Suppy Current, V + /V, ±%;, V OUT = V (Note ) V + /V = ±5V, ±%; V REF = V, V OUT = V (Note ) Seep Mode A DACs (Note 4) V DD Logic Suppy Votage.7 5.5 V V + /V + Positive Anaog Suppy Votage 4.5 6.5 V V Negative Anaog Suppy Votage 6.5 4.5 V Digita Inputs/Outputs V IH Digita Input High Votage V DD =.7V to 5.5V V DD =.7V to.v V IL Digita Input Low Votage V DD =.7V to 5.5V V DD = 4.5V to 5.5V V OH Digita Output High Votage I OH = µa V CC.4 V V OL Digita Output Low Votage I OL = µa.4 V I IN Digita Input Current. ± µa.4. 7.5 7. 8.6.8 µv RMS µv RMS ma ma ma V V V V 74fc
電気的特性 T A = 5 C V = V = 5V V = 5V V DD = 5V REF = REF = 5V AGND = AGNDx = REFG = REFG = GND = V LTC74 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS C IN Digita Input Capacitance V IN = V (Note ) 5 pf タイミング特性 T A = 5 C SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS V DD = 4.5V to 5.5V t SDI Vaid to SCK Setup 7 ns t SDI Vaid to SCK Hod 7 ns t SCK High Time ns t 4 SCK Low Time ns t 5 CS/LD Puse Width 9 ns t 6 SCK High to CS/LD High ns t 7 CS/LD Low to SCK Positive Edge ns t 8 CS/LD High to SCK Positive Edge ns t 9 SRO Propagation Deay C LOAD = pf 8 ns t CLR Puse Width 5 ns t LDAC Puse Width 5 ns t CLR Low to RFLAG Low C LOAD = pf (Note ) 5 ns t CS/LD High to RFLAG High C LOAD = pf (Note ) 4 ns SCK Frequency 5% Duty Cyce (Note 5) 4 MHz V DD =.7V to.v t SDI Vaid to SCK Setup 9 ns t SDI Vaid to SCK Hod 9 ns t SCK High Time 5 ns t 4 SCK Low Time 5 ns t 5 CS/LD Puse Width ns t 6 SCK High to CS/LD High ns t 7 CS/LD Low to SCK Positive Edge ns t 8 CS/LD High to SCK Positive Edge ns t 9 SRO Propagation Deay C LOAD = pf 6 ns t CLR Puse Width 9 ns t LDAC Puse Width ns t CLR Low to RFLAG Low C LOAD = pf 7 ns t CS/LD High to RFLAG High C LOAD = pf 6 ns SCK Frequency 5% Duty Cyce (Note 5) 5 MHz Note 絶対最大定格に記載された値を超えるストレスはデバイスに永続的損傷を与える可能性がある 長期にわたって絶対最大定格条件に曝すと デバイスの信頼性と寿命に悪影響を与える可能性がある Note 記号 V + は V + と V + の両方のピンに同じ電圧が印加される場合の表記に使用される Note 設計によって保証されているが テストされていない Note 4 V~5V のユニポーラ モードで測定 Note 5 SRO を使用する場合 最大 SCK 周波数 f MAX は次式のように SRO 伝播遅延によって制限される f MAX = ここで t s は受信デバイスのセットアップ時間 t ( 9 + t S ) 74fc 5
LTC74 標準的性能特性 LTC74-6 INL () INL DNL INL V REF....8.8.8 ±5V RANGE.6.4...4.6.8. ±V RANGE 684 768 CODE 495 6555 74 G DNL ().6.4...4.6.8. ±V RANGE 684 768 CODE 495 6555 74 G INL ().6.4...4.6.8. MAX MIN 8 6 V REF (V) MAX MIN 4 4 6 8 74 G INL ()..8.6.4...4 O.6.8. 5 INL ±V RANGE MAX MIN 5 7 9 TEMPERATURE ( C) 74 G4 DNL ()..8.6.4...4 O.6.8. 5 DNL ±V RANGE MAX MIN 5 7 9 TEMPERATURE ( C) 74 G5 OFFSET (µv) 6 4 4 6 5 V TO V RANGE 5 7 9 TEMPERATURE ( C) 74 G6 8 6 4 ±V RANGE 6 8 ±V RANGE 4 GAIN ERROR () 4 4 8 6 8 5 5 7 TEMPERATURE ( C) 9 6 5 5 7 9 TEMPERATURE ( C) 74 G7 74 G8 6 74fc
LTC74 標準的性能特性 LTC74-6 V 5V V V V V V OUT 5V/DIV V OUT 5V/DIV V OUT V/DIV V OUT mv/div V OUT mv/div V OUT mv/div CS/LD 5V/DIV CS/LD 5V/DIV CS/LD 5V/DIV.5µs/DIV 74 G8.5µs/DIV 74 G9.5µs/DIV 74 G LTC74-4 INL DNL..8.6 ±V RANGE..8.6 ±V RANGE.4.4.....4.4.6.6.8.8. 496 89 CODE 88 68. 496 89 CODE 88 68 74 G9 74 G LTC74-..8.6.4...4.6.8. INL ±V RANGE 5 56 4 48 56 7 584 495 CODE 74 G..8.6.4...4.6.8. DNL ±V RANGE 5 56 4 48 56 7 584 495 CODE 74 G 74fc 7
LTC74 標準的性能特性 LTC74-6/LTC74-4/LTC74- CS/LD 5V/DIV 5V/DIV 5V/DIV V OUT mv/div ±V RANGE V STEP.5µs/DIV 74 G ±V RANGE V STEP.5µs/DIV 74 G4.5µs/DIV 74 G5.Hz Hz.5. V CC V DD = 5V SCK, SDI, CS/LD, LDAC CLR TIED TOGETHER µv/div I CC (ma).5..5. V TO 5V RANGE CODE = s/div 74 G6.5.5..5..5..5 4. 4.5 5. LOGIC VOLTAGE (V) 74 G7 ピン機能 V 8 5 6 5V 4.5V 6.5V REFG AGNDA DAC A VOSA 4 DAC A 5V V OS DAC A =. V VOSA [V 5V.5V ] 8 CA 5 DAC A A OUTA 6 DAC A RFBA RFBA 7 DAC A LDAC 9 DAC LDAC L DAC 74fc
LTC74 ピン機能 CS/LD SDI CS/LD L SRO SCK A SCK CLR 4 L B DAC RFBD 6 DAC D OUTD 7 DAC D RFBD CD 8 DAC D D VOSD 9 DAC D 5V V OS DAC D =. V VOSD [V 5V,.5V ] AGNDD DAC D REFG REFM REF REFM V /V.5V REFM 4 DAC C DAC D V 5 DAC C DAC D 5V 4.5V 6.5V V AGNDC 6 DAC C VOSC 7 DAC C 5V V OS DAC C =. V VOSC [V 5V,.5V ] CC 8 DAC C C OUTC 9 DAC C RFBC RFBC DAC C AGND GND V DD 4.7V 5.5V RFLAG 5 L H RFBB 7 DAC B OUTB 8 DAC B RFBB CB 9 DAC B B VOSB 4 DAC B 5V V OS DAC B =. V VOSB [V 5V,.5V ] AGNDB 4 DAC B V 4 DAC A DAC B 5V 4.5V 6.5V V REF 4 DAC A DAC B REFM 44 REF REFM V /V.5V 74fc 9
LTC74 REF 4 VOSB 4 4 V + V,8,5,,,6 AGND 5 V + REF VOSC 4 7 CB 9 CC + + ブロック図 8 RFBB 7 OUTB 8 DAC B DAC C RFBC OUTC 9 AGNDB 4 4 5 VOSA CA + + + AGNDC VOSD CD 6 9 8 7 6 RFBA OUTA DAC A DAC D RFBD OUTD 6 7 AGNDA + AGNDD REFM 44 REFG REFM REFG COMMAND DECODE INPUT SHIFT REGS DAC BUFFERS READBACK SHIFT REGS SRO CS/LD SCK SDI 4 CLR 9 LDAC RFLAG 5 V DD 4 GND POR 74 BD タイミング図 t t t t 4 t 6 SCK t 8 SDI t 5 t 7 CS/LD t LDAC t 9 SRO Hi-Z 74 TD 74fc
LTC74 74fc CS/LD L SCK SDI LTC74 4 4 C C C C 4 A A A A 6 MSB SDI 8 4 4 CS/LD L SRO C C A A SDI 4 8 6 9 4 8 b CS/LD H SRO CS/LD L SRO L LDAC L DAC B B CS/ LD H LDAC Update B B C C A A DAC DAC DAC 4 B B B B DAC B B B B B B DAC DAC DAC DAC DAC DAC DAC 4 DAC SRO 6 LTC74-6 D5 D a SRO SRO SDI 6 SCK DAC 4 SRO DAC 4 SRO DAC SLP 4 a b SLP 4 SLP LDAC DAC 動作
LTC74 動作 LTC74 DAC SoftSpan V 5V V V 4.5V 5V V.5V 7.5V 5V V 5V V 5V SoftSpan V V V 4V V V 4V V V V 5V 5V 5V 4 DAC 6 DAC 5mA.8V % V V. C C C C W W + Write to B Span DAC n Set by Previous Command B Span DAC n Write to B Code DAC n Set by Previous Command B Code DAC n Update B B DAC n Set by Previous Command B Span DAC n Update B B A DACs Set by Previous Command B Code DAC n Write to B Span DAC n Update B B DAC n Write to B Code DAC n Update B B DAC n Write to B Span DAC n Update B B A DACs Write to B Code DAC n Update B B A DACs Set by Previous Command Set by Previous Command Set by Previous Command Set by Previous Command Read B Span DAC n B Span DAC n Read B Code DAC n B Code DAC n Read B Span DAC n B Span DAC n Read B Code DAC n B Code DAC n B Span DAC n B Code DAC n B Span DAC n B Code DAC n Seep DAC n (Note ) Set by Previous Command B Span DAC n No Operation Set by Previous Command B Code DAC n 表示されないコードは予備のため使用不可 Note : スリープ状態の DAC に Update B B コマンドを発行することによって 通常動作に復帰可能. A A A A n n DAC A DAC A DAC B DAC B DAC C DAC C DAC D DAC D A DACs DAC A 表示されないコードは予備のため使用不可. S S S S Unipoar V to 5V Unipoar V to V Bipoar 5V to 5V Bipoar V to V Bipoar.5V to.5v Bipoar.5V to 7.5V 表示されないコードは予備のため使用不可 74fc
LTC74 動作 SDI LTC74-6 (WRITE CODE) LTC74-4 (WRITE CODE) LTC74- (WRITE CODE) LTC74- LTC74-4 LTC74-6 (WRITE SPAN) C C C C MSB C C C A A A A D5 D4 D D D D D9 D8 D7 D6 D5 D4 D D D D CONTROL WORD ADDRESS WORD 6-BIT CODE MSB C C C A A A A D D D D D9 D8 D7 D6 D5 D4 D D D D CONTROL WORD ADDRESS WORD 4-BIT CODE ZEROS MSB C C C A A A A D D D9 D8 D7 D6 D5 D4 D D D D CONTROL WORD ADDRESS WORD -BIT CODE 4 ZEROS C C C A A A A S S S S CONTROL WORD ADDRESS WORD ZEROS SPAN. 74 F 74fc
LTC74 動作 CS/LD SCK SDI SRO SRO 4-BIT DATA STREAM CS/LD SCK 4 5 6 7 8 9 4 5 6 7 8 9 4 SDI C C C C A A A A D5 D4 D D D D D9 D8 D7 D6 D5 D4 D D D D CONTROL WORD ADDRESS WORD DAC CODE OR DAC SPAN SRO Hi-Z D5 D4 D D D D D9 D8 D7 D6 D5 D4 D D D D SRO READBACK CODE Hi-Z READBACK SPAN SLP S S S S SLEEP STATUS SPAN 74 Fa a. 4 -BIT DATA STREAM 4 5 6 7 8 9 4 5 6 7 8 9 4 5 6 7 8 9 C C C C A A A A D5 D4 D D D D D9 D8 D7 D6 D5 D4 D D D D Hi-Z READBACK CODE Hi-Z READBACK SPAN 8 ZEROS CONTROL WORD ADDRESS WORD DAC CODE OR DAC SPAN D5 D4 D D D D D9 D8 D7 D6 D5 D4 D D D D SCK SDI t D5 7 t t t 4 SRO D5 D4 t 9 D4 8 74 Fb SLP S S S S SLEEP STATUS SPAN b. 4 74fc
LTC74 動作. 4 DAC A V V DAC V DAC a CS/LD b SDI = c CS/LD DAC B V d CS/LD SDI = e CS/LD DAC A B V V f CS/LD SDI = g CS/LD DAC B h CS/LD SDI = i CS/LD DAC A B j CS/LD SDI = XXXX XXXX XXXX XXXX k CS/LD DAC B B LDAC j k. DAC C.5V DAC B B B a CS/LD B b SDI = c CS/LD DAC C B d CS/LD SDI = e SRO = DAC C B f CS/LD DAC C B.5V g CS/LD SDI = xxxx xxxx xxxx xxxx SRO = DAC C B.5V CS/LD h CS/LD SDI = xxxx xxxx xxxx xxxx i CS/LD DAC C B B j LDAC h i LTC74 LTC74 4 DAC VOSA VOSB VOSC VOSD AGNDA AGNDB AGNDC AGNDD DAC V OS =. V(VOSx)[V~5V ±.5V スパン ] V OS =. V(VOSx)[V~V ±5V.5V~7.5V スパン ] V OS =.4 V(VOSx)[±V スパン ] 5V 5V 74fc 5
LTC74 動作 VOSx MΩ LTC74 kω AGNDx LTC74 DAC 5V S S S S = DAC DAC CLR L B DAC B Update B B LDAC DAC CLR CS/LD L B C C C C = DAC DAC A DAC B DAC C DAC D DAC A DAC B DAC C DAC D DAC A DAC B DAC C DAC D DAC DAC SRO DAC 5 a b 4 4. SLP DAC n Awake DAC n in Seep Mode RFLAG V DD V RFLAG L 6 74fc
LTC74 アプリケーション情報 LTC74 DAC 4 DAC 6 PCB DC75A LTC74 LTC74 / DC75A LTC74 DAC LTC74 LTC74 LTC74 DAC mv LTC74 V V V V LT 76 LT964 Minimizing Switching Reguator Residue in Linear Reguator Outputs LTC74 V DD DAC V DD LT79 GND AGND DAC DAC A DAC B REF DAC C DAC D REF AGNDA AGNDB REFG DC75A GND AGNDC AGNDD REFG DC75A GND DAC IR DAC A DAC B GND DAC C DAC D GND REFG AGNDA AGNDB LT6 U4 DAC A DAC B GND REFG AGNDC AGNDD LT6 U5 DAC C DAC D LT6 LT7 GND GND 74fc 7
LTC74 アプリケーション情報 / LTC74 DAC LT97 OUTx RFBx OUTx Cx GND LTC74 AGND. DC75 74 F GND LTC74 AGND 74 F4 4. DC75 8 74fc
LTC74 アプリケーション情報 JP8 V OUTA V OUTB JP9 V OUTC V OUTD 5. DC75A 74 F5 74 F6 V V 6. DC75A 74fc 9
LTC74 パッケージ GW 44 SSOP. (Reference LTC DWG # 5-8-64) 44.4 ±.7 7.7 7.9* (.698.76) 44 4 4 4 4 9 8 7 6 5 4 9 8 7 6 5 4.84 MIN 7.75 8.58..55 (.98.45).5 ±.65.8 BSC 7.47 7.595** (.9.99).54.46 (..6) 45.55 REF 8 TYP.44.64 (.96.4) 4 5 6 7 8 9 4 5 6 7 8 9.86.88 (.9.94)..75 (.9.5) NOTE...4.7 (.5.5).8 (.5) BSC *.5mm.6" **.54mm.".8.5 (..) TYP.. (.4.8) G44 SSOP 4 74fc
LTC74 改訂履歴 Rev B Rev B /9 ブロック図のタイトルを変更 電気的特性 の記述を Anaog Outputs セクションに変更 動作 セクションの文章と図を削除 C 8/ Note を改訂して 電源シークエンス参照 を削除 表 の DAC A を DAC n に変更 6 5 74fc
LTC74 標準的応用例 / k 9 4 LDAC LDAC VOSA VOSA 5 CS/LD CS/LD CA 7 V DD V SDI SDI RFBA DD SPI INTERFACE 6 SRO SRO OUTA k SCK SCK AGNDA 4 GND k CLR CLR 5 4 RFLAG RFLAG VOSB VOSB 9 REFx CB 7 k REMOTE REFG RFBB GND REF 4 8 VOSx REF OUTB REFMx 5V 5V 44 4 REF REFM REFM AGNDB GND LTC74 7 OFFSET ADJUSTMENT REMOTE REFG VOSC VOSC FOR VOSA, VOSB, REF GND 4 8 VOSC, VOSC REF CC 5V 5V REF REFM REFM RFBC BAT54S V DD 9 OUTC 6 AGNDC GND V REF DD V DD 4 9 V DD VOSD VOSD REGULATOR 5V 8.µF GND CD 6 V S AGND RFBD 7 4 LT79ACS6-5 6 OUTD 5V V IN V OUT AGNDD V + V + V 7V GND GND GND.µF 4.7µF 5 4,8,5,,,6 5V 5V µf µf µf µf V DD OUTA BAV99LT TIE REMOTE OUTB BAV99LT TIE REMOTE BAV99LT OUTSA OUTA OUTSB OUTB OUTSC OUTC OUTC TIE REMOTE OUTSD OUTD OUTD TIE BAV99LT REMOTE 5V 5V 4.7µF 5V 4.7µF 5V 5V 5V.µF V S 5V REF LT6ACS8-5 6 V IN V OUT 5 TRIM GND 4.7µF 4.µF V S 5V REF LT6ACS8-5 6 V IN V OUT 5 TRIM GND 4.7µF 4 GND BAT54S GND TIE REMOTE GND BAT54S GND TIE REMOTE 74 TAa GND GND 関連製品 LT 9 ppm/.5% LT6 ppm/.5% LTC588/LTC589 LTC59 /4/6 SoftSpan I OUT DAC INL/DNL LTC595 SO8 6 I OUT DAC INL/DNL DAC84 6 LTC596 6 I OUT DAC INL/DNL AD754/DAC84 6 LTC597 6 DAC INL/DNL 4 LTC65 6 V OUT DAC 4 LTC857/LTC858 LTC859 /4/6 ksps SoftSpan ADC 4mW 5V LT97 5mA / -94 東京都千代田区紀尾井町 -6 紀尾井町パークビル 8F TEL -56-79 FAX -56-68 www.inear-tech.co.jp 74fc LT 8 REV C PRINTED IN JAPAN LINEAR TECHNOLOGY CORPORATION 6