ADC0801S040 Single 8 bits ADC, up to 40 MHz Rev. 03 — 2 July 2012 Product data sheet 1. General description The ADC0801S040 is an 8-bit universal analog-to-digital converter (ADC) for video and general purpose applications. It converts the analog input signal from 2.7 V to 5.5 V into 8-bit binary-coded digital words at a maximum sampling rate of 40 MHz. All digital inputs and outputs are CMOS/Transistor-Transistor Logic (TTL) compatible. A sleep mode allows reduction of the device power consumption to 4 mW. 2. Features 8-bit resolution Operation between 2.7 V and 5.5 V Sampling rate up to 40 MHz DC sampling allowed High signal-to-noise ratio over a large analog input frequency range (7.3 effective bits at 4.43 MHz full-scale input at fclk = 40 MHz) CMOS/TTL compatible digital inputs and outputs External reference voltage regulator Power dissipation only 30 mW (typical value) Low analog input capacitance, no buffer amplifier required Sleep mode (4 mW) No sample-and-hold circuit required 3. Applications Video data digitizing Camera Camcorder Radio communication Car alarm system ® ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 4. Quick reference data Table 1. Quick reference data VDDA = V5 to V6 = 3.3 V; VDDD = V3 to V4 = 3.3 V; VDDO = V20 to V11 = 3.3 V; VSSA, VSSD and VSSO shorted together; Vi(a)(p-p) = 1.84 V; CL = 20 pF; Tamb = 0 C to 70 C; typical values measured at Tamb = 25 C unless otherwise specified. Symbol Parameter VDDA Conditions Min Typ Max Unit analog supply voltage 2.7 3.3 5.5 V VDDD digital supply voltage 2.7 3.3 5.5 V VDDO output supply voltage 2.5 3.3 5.5 V VDD supply voltage VDDA VDDD difference VDDD VDDO 0.2 - +0.2 V 0.2 - +2.25 V IDDA analog supply current - 4 6 mA IDDD digital supply current - 5 8 mA IDDO output supply current fclk = 40 MHz; ramp input; CL = 20 pF - 1 2 mA INL integral non-linearity ramp input; see Figure 6 - 0.5 0.75 LSB DNL differential non-linearity ramp input; see Figure 7 - 0.25 0.5 LSB fclk(max) maximum clock frequency 40 - - MHz Ptot total power dissipation - 30 53 mW VDDA = VDDD = VDDO = 3.3 V 5. Ordering information Table 2. Ordering information Type number ADC0801S040TS Package Name Description Version SSOP20 plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 2 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 6. Block diagram VDDA CLK VDDD 5 1 3 2 CLOCK DRIVER RT 10 SLEEP ADC0801S040 19 D7 MSB 18 D6 17 D5 Rlad 16 D4 analog voltage input VI RM 9 ANALOG - TO - DIGITAL CONVERTER CMOS OUTPUTS LATCHES 15 D3 data outputs 14 D2 8 13 D1 12 D0 RB 20 7 6 11 4 VSSA VSSO VSSD analog ground output ground digital ground LSB VDDO 014aaa495 Fig 1. Block diagram 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 3 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 7. Pinning information 7.1 Pinning CLK 1 20 VDDO SLEEP 2 19 D7 VDDD 3 18 D6 VSSD 4 17 D5 VDDA 5 16 D4 VSSA 6 ADC0801S 15 D3 040TS RB 7 14 D2 RM 8 13 D1 VI 9 12 D0 RT 10 11 VSSO 014aaa494 Fig 2. Pin configuration 7.2 Pin description Table 3. Pin description Symbol Pin Description CLK 1 clock input SLEEP 2 sleep mode input VDDD 3 digital supply voltage (2.7 V to 5.5 V) VSSD 4 digital ground VDDA 5 analog supply voltage (2.7 V to 5.5 V) VSSA 6 analog ground RB 7 reference voltage BOTTOM input RM 8 reference voltage MIDDLE VI 9 analog input voltage RT 10 reference voltage TOP input VSSO 11 output stage ground D0 12 data output; bit 0 (Least Significant Bit (LSB)) D1 13 data output; bit 1 D2 14 data output; bit 2 D3 15 data output; bit 3 D4 16 data output; bit 4 D5 17 data output; bit 5 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 4 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz Table 3. Pin description …continued Symbol Pin Description D6 18 data output; bit 6 D7 19 data output; bit 7 (Most Significant Bit (MSB)) VDDO 20 positive supply voltage for output stage (2.7 V to 5.5 V) 8. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Min Max Unit analog supply voltage [1] 0.3 +7.0 V VDDD digital supply voltage [1] 0.3 +7.0 V VDDO output supply voltage [1] 0.3 +7.0 V VDD supply voltage difference VDDA VDDD; VDDD VDDO; VDDA VDDO 0.1 +4.0 V VI input voltage referenced to VSSA 0.3 +7.0 V Vi(clk)(p-p) peak-to-peak clock input voltage referenced to VSSD - VDDD V IO output current - 10 mA Tstg storage temperature 55 +150 C Tamb ambient temperature 20 +75 C Tj junction temperature - 150 C VDDA [1] Parameter Conditions The supply voltages VDDA, VDDD and VDDO may have any value between 0.3 V and +7.0 V provided that the supply voltage VDD remains as indicated. 9. Thermal characteristics Table 5. Thermal characteristics Symbol Parameter Condition Value Unit Rth(j-a) thermal resistance from junction to ambient in free air 120 K/W 10. Characteristics Table 6. Characteristics VDDA = V5 to V6 = 3.3 V; VDDD = V3 to V4 = 3.3 V; VDDO = V20 to V11 = 3.3 V; VSSA, VSSD and VSSO shorted together; Vi(a)(p-p) = 1.84 V; CL = 20 pF; Tamb = 0 C to 70 C; typical values measured at Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Supplies VDDA analog supply voltage 2.7 3.3 5.5 V VDDD digital supply voltage 2.7 3.3 5.5 V VDDO output supply voltage 2.5 3.3 5.5 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 5 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz Table 6. Characteristics …continued VDDA = V5 to V6 = 3.3 V; VDDD = V3 to V4 = 3.3 V; VDDO = V20 to V11 = 3.3 V; VSSA, VSSD and VSSO shorted together; Vi(a)(p-p) = 1.84 V; CL = 20 pF; Tamb = 0 C to 70 C; typical values measured at Tamb = 25 C unless otherwise specified. Symbol Parameter VDD Conditions Min Typ Max Unit supply voltage difference VDDA VDDD 0.2 - +0.2 V VDDD VDDO 0.2 - +2.25 V IDDA analog supply current - 4 6 mA IDDD digital supply current - 5 8 mA IDDO output supply current fclk = 40 MHz; ramp input; CL = 20 pF - 1 2 mA Ptot total power dissipation VDDA = VDDD = VDDO = 3.3 V - 30 53 mW Inputs Clock input CLK (Referenced to VSSD)[1] VIL LOW-level input voltage 0 - 0.3 VDDD V VIH HIGH-level input voltage VDDD 3.6 V 0.6 VDDD - VDDD V VDDD > 3.6 V 0.7 VDDD - VDDD V Vclk = 0.3 VDDD IIL LOW-level input current 1 0 +1 A IIH HIGH-level input current Vclk = 0.7 VDDD - - 5 A Zi input impedance fclk = 40 MHz - 4 - k Ci input capacitance fclk = 40 MHz - 3 - pF Input SLEEP (Referenced to VSSD); see Table 8 VIL LOW-level input voltage 0 - 0.3 VDDD V VIH HIGH-level input voltage VDDD 3.6 V 0.6 VDDD - VDDD V VDDD > 3.6 V 0.7 VDDD - VDDD V VIL = 0.3 VDDD 1 - - A - - +1 A IIL LOW-level input current IIH HIGH-level input current VIH = 0.7 VDDD Analog input VI (Referenced to VSSA) IIL LOW-level input current VI = VRB - 0 - A IIH HIGH-level input current VI = VRT - 9 - A Zi input impedance fi = 1 MHz - 20 - k Ci input capacitance fi = 1 MHz - 2 - pF Reference voltages for the resistor ladder; see Table 7 VRB voltage on pin RB 1.1 1.2 - V VRT voltage on pin RT VRT VDDA 2.7 3.3 VDDA V Vref(dif) differential reference voltage VRT VRB 1.5 2.1 2.7 V Iref reference current - 0.95 - mA Rlad ladder resistance - 2.2 - k TCRlad ladder resistor temperature coefficient - 4092 - m/K Voffset offset voltage Vi(a)(p-p) peak-to-peak analog input voltage BOTTOM [2] - 170 - mV TOP [2] - 170 - mV [3] 1.4 1.76 2.4 V 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 6 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz Table 6. Characteristics …continued VDDA = V5 to V6 = 3.3 V; VDDD = V3 to V4 = 3.3 V; VDDO = V20 to V11 = 3.3 V; VSSA, VSSD and VSSO shorted together; Vi(a)(p-p) = 1.84 V; CL = 20 pF; Tamb = 0 C to 70 C; typical values measured at Tamb = 25 C unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit Digital outputs D7 to D0 and IR (Referenced to VSSD) VOL LOW-level output voltage IO = 1 mA 0 - 0.5 V VOH HIGH-level output voltage IO = 1 mA VDDO 0.5 - VDDO V IOZ OFF-state output current 0.4 V < VO < VDDO 20 - +20 A Clock input CLK; see Figure 4[1] fclk(max) maximum clock frequency 40 - - MHz tw(clk)H HIGH clock pulse width 9 - - ns tw(clk)L LOW clock pulse width 9 - - ns Analog signal processing (fclk = 40 MHz) Linearity INL integral non-linearity ramp input; see Figure 6 - 0.5 0.75 LSB DNL differential non-linearity ramp input; see Figure 7 - 0.25 0.5 LSB bandwidth full-scale sine wave Bandwidth B [4] - 10 MHz 75 % full-scale sine wave - 13 MHz 50 % full-scale sine wave - 20 MHz small signal at mid scale; Vi = 10 LSB at code 128 - 350 MHz Input set response; see Figure 8[5] ts(LH) LOW to HIGH settling time full-scale square wave - 3 5 ns ts(HL) HIGH to LOW settling time full-scale square wave - 3 5 ns fi = 4.43 MHz - 50 - dB without harmonics; fi= 4.43 MHz - 47 - dB fi = 300 MHz - 7.8 - bits fi = 4.43 MHz - 7.3 - bits PAL modulated ramp - 1.5 - % Harmonics; see Figure 9[6] THD total harmonic distortion Signal-to-Noise ratio; see Figure S/N 9[6] signal-to-noise ratio Effective bits; see Figure 9[6] ENOB effective number of bits Differential gain[7] Gdif differential gain 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 7 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz Table 6. Characteristics …continued VDDA = V5 to V6 = 3.3 V; VDDD = V3 to V4 = 3.3 V; VDDO = V20 to V11 = 3.3 V; VSSA, VSSD and VSSO shorted together; Vi(a)(p-p) = 1.84 V; CL = 20 pF; Tamb = 0 C to 70 C; typical values measured at Tamb = 25 C unless otherwise specified. Symbol Differential dif Parameter Conditions Min Typ Max Unit PAL modulated ramp - 0.25 - deg - - 5 ns phase[7] differential phase Timing (fclk = 40 MHz; CL = 20 pF); see Figure 4[8] td(s) sampling delay time th(o) output hold time td(o) output delay time 5 - - ns VDDO = 4.75 V 8 12 15 ns VDDO = 3.15 V 8 17 20 ns VDDO = 2.7 V 8 18 21 ns 3-state output delay times; see Figure 5 tdHZ active HIGH to float delay time - 14 18 ns tdZL float to active LOW delay time - 16 20 ns tdZH float to active HIGH delay time - 16 20 ns tdLZ active LOW to float delay time - 14 18 ns [1] In addition to a good layout of the digital and analog ground, it is recommended that the rise and fall times of the clock must not be less than 1 ns. [2] Analog input voltages producing code 0 up to and including code 255: a) Voffset BOTTOM is the difference between the analog input which produces data equal to 00 and the reference voltage on pin RB (VRB) at Tamb = 25 C. b) Voffset TOP is the difference between the reference voltage on pin RT (VRT) and the analog input which produces data outputs equal to code 255 at Tamb = 25 C. [3] To ensure the optimum linearity performance of such a converter architecture the lower and upper extremities of the converter reference resistor ladder are connected to pins RB and RT via offset resistors ROB and ROT as shown in Figure 3. V RT – V RB R OB + R L + R OT a) The current flowing into the resistor ladder is I = --------------------------------------- and the full-scale input range at the converter, to cover code 0 RL to 255 is V I = R L I L = --------------------------------------- V RT + V RB = 0.838 V RT – V RB R OB + R L + R OT RL R OB + R L + R OT b) Since RL, ROB and ROT have similar behavior with respect to process and temperature variation, the ratio --------------------------------------will be kept reasonably constant from device to device. Consequently variation of the output codes at a given input voltage depends mainly on the difference VRT VRB and its variation with temperature and supply voltage. When several ADCs are connected in parallel and fed with the same reference source, the matching between each of them is optimized. [4] The analog bandwidth is defined as the maximum input sine wave frequency which can be applied to the device. No glitches greater than 2 LSB, nor any significant attenuation is observed in the reconstructed signal. [5] The analog input settling time is the minimum time required for the input signal to be stabilized after a sharp full-scale input (square wave signal) in order to sample the signal and obtain correct output data. [6] Effective bits are obtained via a Fast Fourier Transform (FFT) treatment taking 8000 acquisition points per equivalent fundamental period. The calculation takes into account all harmonics and noise up to half of the clock frequency (Nyquist frequency). Conversion to signal-to-noise ratio: S/N = ENOB 6.02 + 1.76 dB. [7] Measurement carried out using video analyzer VM700A, where video analog signal is reconstructed through a DAC. [8] Output data acquisition: the output data is available after the maximum delay time of td(o). 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 8 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz RT 9 ROT code 255 RL RL RM 7 IL RL Rlad RL code 0 ROB RB 6 014aaa504 Fig 3. Explanation of Table 6 Table note 3 11. Additional information relating to Table 6 Table 7. Output coding and input voltage (typical values; referenced to VSSA) Code Vi(a)(p-p) (V) Binary outputs D7 to D0 Underflow < 1.37 00 0000 00 0 1.37 00 0000 00 1 - 00 0000 01 - 254 - 11 11 11 10 255 3.13 11 11 11 11 Overflow > 3.13 11 11 11 11 Table 8. Mode selection SLEEP D7 to D0 IDDA + IDDD (typ) 1 high impedance 1.2 mA 0 active 9 mA 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 9 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz sample N sample N + 1 sample N + 2 tw(clk)L tw(clk)H 50 % CLK sample N sample N + 1 sample N + 2 VI td(s) th(o) VDDO DATA D0 to D7 DATA N−2 DATA N−1 DATA N DATA N+1 50 % 0V td(o) 014aaa508 Fig 4. Timing diagram 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 10 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz VDDD 50 % SLEEP tdHZ tdZH HIGH 90 % output data 50 % tdLZ LOW tdZL HIGH output data 50 % LOW 10 % VDDD 3.3 kΩ ADC0801S040 S1 20 pF SLEEP TEST S1 tdLZ VDDD tdZL VDDD tdHZ GND tdZH GND 014aaa496 frequency on pin SLEEP = 100 kHz. Fig 5. Timing diagram and test conditions of 3-state output delay time 014aaa501 0.291 A (LSB) 0.178 0.065 −0.047 −0.160 −0.272 0 68 136 204 272 codes Fig 6. Typical Integral Non-Linearity (INL) performance 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 11 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 014aaa502 0.150 A (LSB) 0.091 0.032 −0.025 −0.84 −0.143 0 68 136 204 272 codes Fig 7. Typical Differential Non-Linearity (DNL) performance ts(LH) ts(HL) code 255 VI 50 % 50 % code 0 5 ns CLK 5 ns 50 % 50 % 2 ns 2 ns 014aaa497 Fig 8. Analog input settling-time diagram 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 12 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 014aaa503 0 A (dB) −40 −80 −120 0 5.0 10.0 15.0 20.0 f (MHz) Effective bits: 7.32; THD = 51.08 dB. Harmonic levels (dB): 2nd = 68.99; 3rd = 51.62; 4th = 66.05; 5th = 63.23; 6th = 72.79. Fig 9. Typical fast Fourier transform (fclk = 40 MHz; fi = 4.43 MHz) VDDA VDDO D7 to D0 VI VSSO VSSA 014aaa505 014aaa498 Fig 10. CMOS data outputs Fig 11. VI analog input VDDA VDDO RT RL RL RM SLEEP RL RL RB VSSO VSSA 014aaa506 014aaa499 Fig 12. SLEEP 3-state input Fig 13. RB, RM and RT inputs 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 13 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz VDDD 1/ V 2 DDD CLK VSSD 014aaa507 Fig 14. CLK input 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 14 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 12. Application information 12.1 Application diagrams CLK 1 20 VDDO SLEEP 2 19 D7 VDDD 3 18 D6 VSSD 4 17 D5 VDDA 5 16 D4 ADC0801S040 VSSA RB(1) 100 nF RM(1) 6 15 D3 7 14 D2 8 13 D1 9 12 D0 10 11 VSSO 100 nF VSSA VI VSSA RT(1) 100 nF VSSA 014aaa500 The analog and digital supplies should be separated and decoupled. The external voltage reference generator must be built in such a way that a good supply voltage ripple rejection is achieved with respect to the LSB value. Eventually, the reference ladder voltages can be derived from a well regulated VDDA supply through a resistor bridge and a decoupling capacitor. (1) RB, RM, RT are decoupled to VSSA. Fig 15. Application diagram 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 15 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 13. Package outline SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm D SOT266-1 E A X c y HE v M A Z 11 20 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 10 detail X w M bp e 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) θ mm 1.5 0.15 0 1.4 1.2 0.25 0.32 0.20 0.20 0.13 6.6 6.4 4.5 4.3 0.65 6.6 6.2 1 0.75 0.45 0.65 0.45 0.2 0.13 0.1 0.48 0.18 10 o o 0 Note 1. Plastic or metal protrusions of 0.20 mm maximum per side are not included. OUTLINE VERSION SOT266-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 MO-152 Fig 16. Package outline SOT266-1 (SSOP20) 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 16 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 14. Revision history Table 9. Revision history Document ID Release date Data sheet status Change notice Supersedes ADC0801S040_3 20120702 Product data sheet - ADC0801S040_2 ADC0801S040_2 20080818 Product data sheet - ADC0801S040_1 - - Modifications: ADC0801S040_1 • • • • • Corrections made to table notes in Figure 1. Corrections made to Table 3. Corrections made to symbol in Table 4. Corrections made to Table 6. Corrections made to Figure 13 20080612 Product data sheet 15. Contact information For more information or sales office addresses, please visit: http://www.idt.com 3ADC0801S040_3 Product data sheet © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 17 of 18 ADC0801S040 Integrated Device Technology Single 8 bits ADC, up to 40 MHz 16. Contents 1 2 3 4 5 6 7 7.1 7.2 8 General description . . . . . . . . . . . . . . . . . . . . . . Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . Quick reference data . . . . . . . . . . . . . . . . . . . . . Ordering information . . . . . . . . . . . . . . . . . . . . . Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . Pinning information . . . . . . . . . . . . . . . . . . . . . . Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin description . . . . . . . . . . . . . . . . . . . . . . . . . Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 1 2 2 3 4 4 4 5 9 10 11 12 12.1 13 14 15 16 3ADC0801S040_3 Product data sheet Thermal characteristics . . . . . . . . . . . . . . . . . . 5 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 5 Additional information relating to Table 6 . . . 9 Application information . . . . . . . . . . . . . . . . . 15 Application diagrams . . . . . . . . . . . . . . . . . . . 15 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 16 Revision history . . . . . . . . . . . . . . . . . . . . . . . 17 Contact information . . . . . . . . . . . . . . . . . . . . 17 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 © IDT 2012. All rights reserved. Rev. 03 — 2 July 2012 18 of 18