 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| TS472 Very Low Noise Microphone Preamplifier with 2V Biased Output and Active Low Standby Mode Low noise: 10nV/Hz typ. equivalent input noise @ F = 1kHz Fully differential input/output 2.2V to 5.5V single supply operation Low power consumption @20dB: 1.8mA Fast start up time @ 0dB: 5ms typ. Low distortion: 0.1% typ. 40kHz bandwidth @ -3dB and adjustable Active low standby mode function (1A max) Low noise 2.0V microphone bias output Available in flip-chip lead-free package ESD protection (2kV) Flip-chip - 12 bumps Pin Connections (top view) C1 C2 STDBY VCC OUTPUT BIAS GS OUT+ OUT- Description The TS472 is a differential-input microphone preamplifier optimized for high-performance, PDA and notebook audio systems. This device features an adjustable gain from 0dB to 40dB with excellent power-supply and common-mode rejection ratios. In addition, the TS472 has a very low-noise microphone bias generator of 2V. It also includes a complete shutdown function, with active low standby mode. IN+ IN- GND BYPASS Applications Video and photo cameras with sound input Sound acquisition & voice recognition Video conference systems Notebook computers and PDAs Order Codes Part Number TS472EIJT Temperature Range -40, +85C Package Flip-Chip Packing Tape & Reel Marking 472 October 2005 Rev 2 1/20 www.st.com 20 Typical Application Schematic TS472 1 Typical Application Schematic Figure 1 shows a typical application schematic for the TS472 with gain = 20dB. To change the gain see Chapter 4.5: Gain settings on page 14. Figure 1. Application schematic Optional C1 VCC Cs 1uF C2 D3 A3 C3 1uF Rpos U1 B3 TS472 Rout+ C1 C2 Vcc Cin+ Cout+ A1 B1 IN+ IN- OUT+ OUTGAIN SELECT C2 D2 CoutRout- + Electret Mic Rneg Cin- Positive Output Negative Output G A2 B2 BIAS 2.0V GND Bias STDBY BYPASS D1 Cb 1uF C1 C3 Standby Control Table 1. External component descriptions Functional Description Input coupling capacitors which blocks the DC voltage at the amplifier input terminal and determine Lower cut-off frequency. Output coupling capacitors which blocks the DC voltage coming from the amplifier output terminal (pins C2 and D2) and determine Lower cut-off frequency. Output load resistors which allow to charged the output coupling capacitors Cout. These output resistors can be represented by an input impedance of a following stage. Microphone biasing resistors Supply Bypass capacitor which provides power supply filtering. Bypass pin capacitor which provides half supply filtering. Low pass filter capacitors which can determine Higher cut-off frequency. Bias output capacitor which keeps voltage stabilized and provides 2.0V bias filtering. Components Cin+, CinCout+, Cout- Rout+, RoutRpos, Rneg Cs Cb C1, C2 C3 2/20 TS472 Absolute Maximum Ratings 2 Absolute Maximum Ratings Table 2. Symbol VCC Vi Toper Tstg Tj Rthja ESD ESD Supply voltage (1) Input Voltage Operating Free Air Temperature Range Storage Temperature Maximum Junction Temperature Flip-chip Thermal Resistance Junction to Ambient Human Body Model Machine Model Lead Temperature (soldering, 10sec) 1. All voltages values are measured with respect to the ground pin. Key parameters and their absolute maximum ratings Parameter Value 6 GND-0.3 to VCC+0.3 -40 to + 85 -65 to +150 150 180 2 200 250 Unit V V C C C C/W kV V C Table 3. Symbol VCC G Operating conditions Parameter Supply Voltage Typical Differential Gain (GS connected to 4.7k or Bias) Standby Voltage Input: Device ON Device OFF Operational Free Air Temperature Range Flip-chip Thermal Resistance Junction to Ambient Value 2.2 to 5.5 20 Unit V dB VSTB TOP Rthja 1.5 VSTB V CC GND VSTB 0.4 -40 to +85 150 V C C/W 3/20 Electrical Characteristics TS472 3 Electrical Characteristics Table 4. Symbol en THD+N VIN BW VCC = 3V, GND = 0V, Tamb = 25C (unless otherwise specified) Parameter Equivalent Input Noise Voltage Density REQ=100 at 1KHz Total Harmonic Distortion + Noise 20Hz F 20kHz, Gain=20dB, Vin=50mVRMS Input Voltage, Gain=20dB Bandwidth @ -3dB Bandwidth @ -1dB pin A3, B3 floating Overall Output Voltage Gain (Rgs variable) Minimum Gain, Rgs infinite Maximum Gain, Rgs=0 Input impedance referred to GND Resistive load Capacitive load Supply current, Gain=20dB 1.8 -3 39.5 80 10 100 2.4 1 Min. Typ. 10 0.1 10 40 20 70 Max. Unit nV ----------Hz % mVRMS kHz G ZIN RLOAD CLOAD ICC -1.5 41 100 0 42.5 120 dB k k pF mA A ISTANDBY Standby current Power Supply Rejection Ratio, Gain=20dB, F=217Hz, Vripple=200mVpp, Inputs grounded Differential Output Single-Ended Outputs, PSRR -70 -46 dB Table 5. Symbol VOUT ROUT IOUT PSRR Bias output: V CC = 3V, GND = 0V, Tamb = 25C (unless otherwise specified) Parameter No load condition Output resistance Output Bias Current Power Supply Rejection Ratio, F=217Hz, Vripple=200mVpp 70 Min. 1.9 80 Typ. 2 100 2 80 Max. 2.1 120 Unit V mA dB 4/20 TS472 Table 6. Gain (dB) 0 20 40 Electrical Characteristics Differential RMS noise voltage Input Referred Noise Voltage (VRMS) Unweighted Filter 15 3.4 1.4 A-weighted Filter 10 2.3 0.9 Output Noise Voltage (VRMS) Unweighted Filter 15 34 141 A-weighted Filter 10 23 91 Table 7. Bias output RMS noise voltage Cout (F) 1 10 Unweighted Filter (VRMS) 5 2.2 A-weighted Filter (VRMS) 4.4 1.2 Table 8. Gain (dB) SNR (signal to noise ratio), THD+N < 0.5% Unweighted Filter (dB) Vcc=2.2V Vcc=3V 76 83 72 Vcc=5.5V 76 83 74 Vcc=2.2V 79 89 80 A-weighted Filter (dB) Vcc=3V 80 90 82 Vcc=5.5V 80 90 84 0 20 40 75 82 70 Note: Unweighted filter = 20Hz F 20kHz 5/20 Electrical Characteristics Table 9. Index of graphics Description Figure TS472 Page Current consumption vs. power supply voltage Standby threshold voltage vs. power supply voltage Frequency response Bias output voltage vs. bias output current Bias output voltage vs. power supply voltage Bias PSRR vs. frequency Differential output PSRR vs. frequency Differential output PSRR vs. frequency Single-ended output PSRR vs. frequency Equivalent input noise voltage density D gain vs. power supply voltage Dgain vs. ambient temperature Maximum input voltage vs. gain, THD+N<1% THD+N vs. input voltage THD+N vs. frequency Transient response Figure 2 to 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 to 9 Figure 10 to 11 Figure 12 to 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 to 19 Figure 20 to 25 Figure 26 to 27 Figure 28 to 29 page 7 page 7 page 7 page 7 page 7 page 8 page 8 page 8 page 9 page 9 page 9 page 9 page 9 page 10 page 11 page 11 6/20 TS472 Figure 2. Current consumption vs. power supply voltage Figure 3. Electrical Characteristics Current consumption vs. power supply voltage 3.0 No Loads, Minimum Gain 2.5 Current Consumption (mA) 3.0 No Loads, Maximum Gain 2.5 Current Consumption (mA) 2.0 1.5 1.0 0.5 0.0 2.2 3 4 Power Supply Voltage (V) 5 5.5 T AMB =-40C TAMB=25C T AMB =85C 2.0 1.5 1.0 T AMB=-40C 0.5 0.0 TAMB =25C TAMB =85C 2.2 3 4 Power Supply Voltage (V) 5 5.5 Figure 4. Standby threshold voltage vs. power supply voltage Figure 5. Frequency response 1.0 Standby Treshold Voltage (V) 30 Cb=1F, T AMB =25C, Gain=20dB, Rout=100k 0.8 PSRR (dB) 20 0.6 10 no C1,C2 C1,C2=100pF Cin,Cout=100nF 0.4 0 0.2 No Loads Tamb = 25C 2.2 3 4 Power Supply Voltage (V) 5 5.5 -10 C1,C2=220pF Cin,Cout=10nF 0.0 -20 10 100 1000 Frequency (Hz) 10000 100000 Figure 6. Bias output voltage vs. bias output current Figure 7. Bias output voltage vs. power supply voltage 2.2 2.2 Tamb=25C Bias Output Voltage (V) Ibias=0mA Bias Output Voltage (V) 2.0 Tamb=85C 1.8 2.0 Ibias=2mA 1.8 Ibias=4mA 1.6 Tamb=-40C 1.6 Tamb=25C 1.4 0 1 2 3 Bias Output Current (mA) 4 1.4 2.2 3 4 Power Supply Voltage (V) 5 5.5 7/20 Electrical Characteristics Figure 8. 0 Vripple=200mVpp Vcc=3V Cb=1F Tamb =25C PSRR (dB) TS472 Figure 9. 0 Vripple=200mVpp Vcc=5V Cb=1F Tamb=25C Bias=1k to GND Bias PSRR vs. frequency Bias PSRR vs. frequency -20 PSRR (dB) -20 -40 Bias floating or 1k to GND -40 -60 -60 -80 -80 Bias floating -100 50 -100 100 1k Frequency (Hz) 10k 20k 50 100 1k Frequency (Hz) 10k 20k Figure 10. Differential output PSRR vs. frequency 0 V RIPPLE =200mV PP , Inputs grounded -20 V CC=3V, Cb=Cin=1F, T AMB =25C Maximum Gain PSRR (dB) Figure 11. Differential output PSRR vs. frequency 0 V RIPPLE =200mV PP, Inputs grounded -20 V CC =5V, Cb=Cin=1F, TAMB =25C Maximum Gain PSRR (dB) -40 -40 -60 Gain=20dB Minimum Gain -60 Gain=20dB Minimum Gain -80 -80 -100 50 100 1k Frequency (Hz) 10k 20k -100 50 100 1k Frequency (Hz) 10k 20k Figure 12. Differential output PSRR vs. frequency 0 V RIPPLE=200mV PP , Inputs grounded -20 PSRR (dB) Figure 13. Differential output PSRR vs. frequency 0 V RIPPLE =200mV PP , Inputs grounded -20 PSRR (dB) V CC =3V, Minimum Gain, Cin=1F, T AMB =25C V CC =3V, Gain=20dB, Cin=1F, T AMB =25C -40 No Cb -60 Cb=100nF Cb=1F -40 Cb=1F No Cb -60 -80 -80 Cb=100nF -100 50 100 1k Frequency (Hz) 10k 20k -100 50 100 1k Frequency (Hz) 10k 20k 8/20 TS472 Figure 14. Single-ended output PSRR vs. frequency 0 -10 -20 PSRR (dB) Electrical Characteristics Figure 15. Equivalent input noise voltage density 1000 -30 -40 -50 -60 -70 -80 50 en (nV/Hz) Vripple=200mVpp Inputs grounded Cb=1F Cin=100nF Tamb=25C Cin=100nF R EQ =100 Vcc=3V 100 TAMB=25C 10 Vcc=2.2V 100 1000 Frequency (Hz) Vcc=5V 10000 20k 1 10 100 1k Frequency (Hz) 10k 100k Figure 16. gain vs. power supply voltage 1.0 0.8 0.6 Gain (dB) Figure 17. gain vs. ambient temperature 0.50 F=1kHz Vin=5mV Tamb=25C Maximum Gain 0.25 0.00 Gain (dB) F=1kHz V IN =5mV 0.4 0.2 0.0 -0.2 -0.4 2.2 3 4 Power Supply Voltage (V) 5 -0.25 Maximum Gain -0.50 Gain=20dB Minimum Gain -20 0 20 40 Ambient Temperature (C) 60 80 Minimum Gain Gain=20dB 5.5 -0.75 -1.00 -40 Figure 18. Maximum input voltage vs. gain, THD+N<1% 150 Maximum Input Voltage (mVRMS) Figure 19. Maximum input voltage vs. power supply voltage, THD+N<1% V CC =5.5V F=1kHz THD+N<1% Maximum Input Voltage (mV RMS) TAMB =25C 140 120 100 80 60 40 20 0 T AMB =25C, F=1kHz, THD+N<1% Gain=0dB 100 50 V CC =3V V CC =2.2V 0 0 10 20 Gain (dB) 30 40 Gain=40dB Gain=30dB Gain=20dB 2.2 3 4 Power Supply Voltage (V) 5 5.5 9/20 Electrical Characteristics Figure 20. THD+N vs. input voltage 10 Minimum Gain Gain=20dB 1 THD+N (%) THD+N (%) TS472 Figure 21. THD+N vs. input voltage 10 Minimum Gain Gain=20dB 1 0.1 Maximum Gain 0.01 1E-3 Tamb=25C, Vcc=3V, F=100Hz, Cb=1F, RL=10k, BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 0.1 Maximum Gain 0.01 Tamb=25C, Vcc=5V, F=100Hz, Cb=1F, RL=10k , BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 0.1 0.3 1E-3 0.1 0.3 Figure 22. THD+N vs. input voltage 10 Minimum Gain Gain=20dB 1 THD+N (%) Figure 23. THD+N vs. input voltage 10 Minimum Gain Gain=20dB 1 THD+N (%) 0.1 Maximum Gain 0.01 Tamb=25C, Vcc=3V, F=1kHz, Cb=1F, RL=10k, BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 0.1 Maximum Gain 0.01 Tamb=25C, Vcc=5V, F=1kHz, Cb=1F, RL=10k, BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 1E-3 0.1 0.3 1E-3 0.1 0.3 Figure 24. THD+N vs. input voltage 10 Minimum Gain Maximum Gain 1 THD+N (%) Figure 25. THD+N vs. input voltage 10 Minimum Gain Maximum Gain 1 THD+N (%) Gain=20dB Gain=20dB 0.1 0.1 0.01 T AMB =25C, V CC =3V, F=20kHz, Cb=1F, RL=10k, BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 0.01 0.1 0.3 Tamb=25C, Vcc=5V, F=20kHz, Cb=1F, RL=10k, BW=100Hz-120kHz 0.01 Input Voltage (V RMS ) 1E-3 1E-3 0.1 0.3 10/20 TS472 Figure 26. THD+N vs. frequency 10 Tamb=25C, Vcc=3V, RL=10k Cb=1F, BW=100Hz-120kHz Maximum Gain, Vin=15mVRMS 1 THD + N (%) THD + N (%) Electrical Characteristics Figure 27. THD+N vs. frequency 10 Tamb=25C, Vcc=5V, RL=10k Cb=1F, BW=100Hz-120kHz Maximum Gain, Vin=15mVRMS 1 Minimum Gain, Vin=100mV RMS Minimum Gain, Vin=100mVRMS 0.1 Gain=20dB, Vin=50mVRMS 0.1 Gain=20dB, Vin=50mVRMS 0.01 50 100 1000 Frequency (Hz) 10000 20k 0.01 50 100 1000 Frequency (Hz) 10000 20k Figure 28. Transient response Figure 29. Transient response 11/20 Application Information TS472 4 4.1 Application Information Differential configuration principle The TS472 is a full-differential input/output microphone preamplifier. The TS472 also includes a common mode feedback loop that controls the output bias value to average it at Vcc/2. This allows the device to always have a maximum output voltage swing, and by consequence, maximize the input dynamic voltage range. The advantages of a full-differential amplifier are: Very high PSRR (Power Supply Rejection Ratio). High common mode noise rejection. In theory, the filtering of the internal bias by an external bypass capacitor is not necessary. But, to reach maximum performances in all tolerance situations, it's better to keep this option. 4.2 Higher cut-off frequency The higher cut-off frequency FCH of the microphone preamplifier depends on an external capacitors C1, C2. TS472 has an internal first order low pass filter (R=40k, C=100pF) to limit the highest cut-off frequency on 40kHz (with a 3dB attenuation). By connecting C1, C2 you can decrease FCH with regard to following formula: 1 F CH = --------------------------------------------------------------------------------3 -12 2 40 x10 ( C 1, 2 + 100 x10 ) Figure 24, which follows, directly shows the higher cut-off frequency in Hz versus the value of the output capacitors C1, C2 in nF: Figure 30. Higher cut-off frequency vs. output capacitors 40 Higher Cut-off Frequency (kHz) 10 1 200 400 600 C1, C2 (pF) 800 1000 For example, FCH is almost 20kHz with C1,2=100pF. 12/20 TS472 Application Information 4.3 Lower cut-off frequency The lower cut-off frequency FCL of the microphone preamplifier depends on the input capacitors Cin and output capacitors C out. These input and output capacitors are mandatory in a application because of DC voltage blocking. The input capacitors Cin in serial with the input impedance of the TS472 (100k) are equivalent to a first order high pass filter. Assuming that FCL is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of Cin is: 1 C in = ---------------------------------------------3 2 F CL 100 x10 The capacitors Cout in serial with the output resistors R out (or an input impedance of the next stage) are also equivalent to a first order high pass filter. Assuming that FCL is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of Cout is: 1 C out = ------------------------------------2 F CL R out Figure 31. Lower cut-off frequency vs. input capacitors 1000 ZinMAX Typical Zin Figure 32. Lower cut-off frequency vs. output capacitors 1000 Rout=10k Lower Cut-off frequency (Hz) Lower Cut-off frequency (Hz) 100 100 ZinMIN Rout=100k 10 1 10 Cin (nF) 100 10 1 10 Cout (nF) 100 1000 Figure 30 and Figure 32 give directly the lower cut-off frequency (with 3dB attenuation) versus the value of the input or output capacitors Note: In case FCL is kept the same for calculation, It must be taken in account that the 1st order highpass filter on the input and the 1st order high-pass filter on the output create a 2nd order highpass filter in the audio signal path with an attenuation of 6dB on FCL and a rolloff of 40db decade. 4.4 Low-noise microphone bias source The TS472 provides a very low noise voltage and power supply rejection BIAS source designed for biasing an electret condenser microphone cartridges. The BIAS output is typically set at 2.0 VDC (no load conditions), and can typically source 2mA with respect to drop-out, determined by the internal resistance 100 (for detailed load regulation curves see Figure 6). 13/20 Application Information TS472 4.5 Gain settings The gain in the application depends mainly on: the sensitivity of the microphone, the distance to the microphone, the audio level of the sound, the desired output level. The sensitivity of the microphone is generally expressed in dB/Pa, referenced to 1V/Pa. For example, the microphone used in testing had an output voltage of 6.3 mV for a sound pressure of 1 Pa (where Pa is the pressure unit, Pascal). Expressed in dB, the sensitivity is: 20Log(0.0063) = -44 dB/Pa To facilitate the first approach, the following table gives voltages and gains used with a low cost omnidirectional Electret Condenser Microphone of -44dB/Pa. Table 10. Typical TS472 gain vs. distance to the microphone (sensitivity -44dB/Pa) Microphone output voltage 30 mVRMS 3 mV RMS TS472 Gain 20 100 Distance to microphone 1 cm 20 cm The gain of the TS472 microphone preamplifier can be set: 1. From -1.5 dB to 41 dB by connecting an external grounded resistor RGS to the GS pin. It allows to adapt more precisely the gain to each application. Table 11. Gain (dB) RGS () Selected gain vs. gain select resistor 0 470k 10 27k 20 4k7 30 1k 40 68 Figure 33. Gain in dB vs. gain select resistor 50 Tamb=25C 40 30 Gain (dB) Figure 34. Gain in V/V vs. gain select resistor Tamb=25C 100 Gain (V/V) 20 10 0 -10 10 10 1 10 100 1k 10k R GS () 100k 1M 100 1k 10k R GS () 100k 1M 14/20 TS472 2. Application Information To 20dB by applying VGS > 1VDC on Gain Select (GS) pin. This setting can help to reduce a number of external components in an application, because 2.0 VDC is provided by TS472 itself on BIAS pin. Following Figure 26 gives other values of the gain vs. voltage applied on GS pin Figure 35. Gain vs. gain select voltage 40 20 0 -20 -40 -60 -80 Tamb=25C Gain (dB) 0 0.2 0.4 0.6 V GS (V) 0.8 4 5 4.6 Wake-up time When the standby is released to put the device ON, a signal appears on the output a few microseconds later, and the bypass capacitor Cb is charged in a few milliseconds. As Cb is directly linked to the bias of the amplifier, the bias will not work properly until the Cb voltage is correct. In the typical application, when a biased microphone is connected to the differential input via the input capacitors (Cin), (and the output signal is in line with the specification), the wake-up time will depend upon the values of the input capacitors Cin and the gain. When gain is lower than 0dB, the wake-up time is determined only by the bypass capacitor Cb, as described above. For a gain>0dB, see Figure 36 Figure 36. Wake-up time in the typical application vs. input capacitors 60 50 Wake-up Time (ms) Tamb = 25C Vcc=3V Cb=1F Maximum Gain 40 30 20 10 0 20 Gain=20dB 40 60 Input capacitors C IN (nF) 80 100 15/20 Application Information TS472 4.7 Standby mode When the standby command is set, the time required to set the output stages (differential outputs and 2.0V bias output) in high impedance and the internal circuitry in shutdown mode is a few microseconds. 4.8 Layout considerations The TS472 has sensitive pins to connect C1, C2 and Rgs. To obtain high power supply rejection and low noise performance, it is mandatory that the layout track to these component is as short as possible. Decoupling capacitors on Vcc and bypass pin are needed to eliminate power supply drops. In addition, the capacitor location for the dedicated pin should be as close to the device as possible. 4.9 Demoboard A demoboard for the TS472 is available. For more information about this demoboard, please refer to Application Note AN2240, which can be found on www.st.com. Figure 37. Top layer Figure 38. Bottom layer Figure 39. Component location 16/20 TS472 Figure 40. Demoboard schematic Jumper J4 Application Information P10 1 2 Vx 1 2 P11 Vbias 2 1 P5 1 2 Vcc 1 1 C6 100nF VCC C1 1 C7 1uF C2 1 2 100pF 1 C8 2 2 100pF 1 C9 1 2 100nF 2 P2 R9 100k POS. OUTPUT NEG. OUTPUT 4 3 2 1 OUTPUT R8 100k 2 Jumper J2 12 P8 20dB Min Max Rgs 1 C3 1uF 2 1 3 5 7 2 4 6 8 Bias Gain Select 1 R1 470k P9 0dB 10dB 20dB 30dB 40dB 1 3 5 7 9 Rgs 2 4 6 8 10 1 R2 27k 1 R3 4.7k 1 R4 1k 1 R5 Jumper J3 68 2 2 2 2 2 R10 Bias R6 2 1 C10 1uF 2 1 2 2 100nF 14 3 1 TS472_FC_Adapter C1 P1 4 3 2 1 INPUT POS. INPUT NEG. INPUT 1 2 100nF 6 8 C5 IN+ IN- C2 C4 Vcc OUT+ 13 OUTGAIN SELECT 1 2 100nF Gain Bias 4 5 1 R7 2 BIAS Bias STDBY BYPASS 10 C11 2 2 R11 9 GND 1 1 P6 Jumper J1 1 2 3 StandBy VCC 15 1 17/20 Package Mechanical Data TS472 5 Package Mechanical Data Figure 41. TS472 footprint recommendation 50m 0 20m =5 50m 0 7 m . 5 m in 1 0 mm x 0 a. T ck ra 50m 0 4 0 mty . =0 p 3 0 mm . =4 in 1 0 mm . 5 in N n S ld r m sk o e in o oe a pn g 50m 0 P d in C 1 w F s N u(2 , 0 m x a u 8 m ith la h iA -6 m .2 m a .) Figure 42. Pin-out (top view) 3 2 1 C1 C2 STDBY VCC OUTPUT BIAS GS OUT+ OUT- IN+ IN- GND BYPASS A B C D n Balls are underneath Figure 43. Marking (top view) ST Logo Part number: 472 E Lead free Bumps Three digits Datecode: YWW The dot is for marking pin A1 472 YW W E 18/20 TS472 Figure 44. Flip-chip - 12 bumps 2.1 mm Package Mechanical Data 1.6 mm 0.5m m Die size: 2.1mm x 1.6mm 30m Die height (including bumps): 600m Bumps diameter: 315m 50m Bump Diameter Before Reflow: 300m 10m Bumps Height: 250m 40m Die Height: 350m 20m Pitch: 500m 50m Coplanarity: 50m max 0.5mm 0.315mm 6m 0 0 Figure 45. Tape & reel specification (top view) 4 1.5 1 A A Die size Y + 70m 1 8 Die size X + 70m 4 All dimensions are in mm User direction of feed 19/20 Revision History TS472 6 Revision History Date July 2005 Oct. 2005 Revision 1 2 Changes First Release corresponding to the product preview version. First release of fully mature product datasheet. Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 20/20 |
Price & Availability of TS472EIJT
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |