công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
HI-565A bảng dữ liệu(PDF) 4 Page - Intersil Corporation |
|
HI-565A bảng dữ liệu(HTML) 4 Page - Intersil Corporation |
4 / 9 page 4 Definitions of Specifications Digital Inputs The HI-565A accepts digital input codes in binary format and may be user connected for any one of three binary codes. Straight Binary, Two’s Complement (Note 5), or Offset Binary, (See Operating Instructions). Nonlinearity of a D/A converter is an important measure of its accuracy. It describes the deviation from an ideal straight line transfer curve drawn between zero (all bits OFF) and full scale (all bits ON) (End Point Method). Differential Nonlinearity for a D/A converter, it is the difference between the actual output voltage change and the ideal (1 LSB) voltage change for a one bit change in code. A Differential Nonlinearity of ±1 LSB or less guarantees monotonicity; i.e., the output always increases for an increasing input. Settling Time is the time required for the output to settle to within the specified error band for any input code transition. It is usually specified for a full scale or major carry transition, settling to within ±0.5 LSB of final value. Gain Drift is the change in full scale analog output over the specified temperature range, expressed in parts per million of full scale range per oC (ppm of FSR/oC). Gain error is measured with respect to 25oC at high (TH) and low (TL) temperatures. Gain drift is calculated for both high (TH -25oC) and low ranges (25oC -TL) by dividing the gain error by the respective change in temperature. The specification is the larger of the two representing worst-case drift. Offset Drift is the change in analog output with all bits OFF over the specified temperature range expressed in parts per million of full scale range per oC (ppm of FSR/oC). Offset error is measured with respect to 25oC at high (TH) and low (TL) temperatures. Offset Drift is calculated for both high (TH -25oC) and low (25oC -TL) ranges by dividing the offset error by the respective change in temperature. The specification given is the larger of the two, representing worst-case drift. Power Supply Sensitivity is a measure of the change in gain and offset of the D/A converter resulting from a change in -15V or +15V supplies. It is specified under DC conditions and expressed as parts per million of full scale range per percent of change in power supply (ppm of FSR/%). Compliance Voltage is the maximum output voltage range that can be tolerated and still maintain its specified accuracy. Compliance Limit implies functional operation only, and makes no claims to accuracy. Glitch a glitch on the output of a D/A converter is a transient spike resulting from unequal internal ON-OFF switching times. Worst case glitches usually occur at half-scale or the major carry code transition from 011...1 to 100...0 or vice versa. For example, if turn ON is greater than turn OFF for 011...1 to 100...0, an intermediate state of 000...0 exists, such that, the output momentarily glitches toward zero output. Matched switching times and fast switching will reduce glitches considerably. Detailed Description Op Amp Selection The Hl-565As current output may be converted to voltage using the standard connections shown in Figures 1 and 2. The choice of operational amplifier should be reviewed for each application, since a significant trade-off may be made between speed and accuracy. For highest precision, use an HA-5135. This amplifier contributes negligible error, but requires about 11 µs to settle within ±0.1% following a 10V step. The Intersil HA-2600/05 is the best all-around choice for this application, and it settles in 1.5 µs (also to ±0.1% following a 10V step). Remember, settling time for the DAC amplifier combination is the square root of tD 2 plus t A 2, where t D , tA are settling times for the DAC and amplifier. No-Trim Operation The Hl-565A will perform as specified without calibration adjustments. To operate without calibration, substitute 50 Ω resistors for the 100 Ω trimming potentiometers: In Figure 1 replace R2 with 50 Ω also remove the network on pin 8 and connect 50 Ω to ground. For bipolar operation in Figure 2, replace R3 and R4 with 50 Ω resistors. With these changes, performance is guaranteed as shown under Specifications, “External Adjustments”. Typical unipolar zero will be ±0.5 LSB plus the op amp offset. The feedback capacitor, C, must be selected to minimize settling time. Calibration Calibration provides the maximum accuracy from a converter by adjusting its gain and offset errors to zero. For the Hl-565A, these adjustments are similar whether the current output is used, or whether an external op amp is TABLE 1. DIGITAL INPUT ANALOG OUTPUT STRAIGHT BINARY OFFSET BINARY (NOTE 5) TWO'S COMPLEMENT MSB...LSB 000...000 Zero -FS (Full Scale) Zero 100...000 1/ 2FS Zero -FS 111...111 +FS - 1 LSB +FS - 1 LSB Zero - 1 LSB 011...111 1/2FS - 1 LSB Zero - 1 LSB +FS - 1 LSB NOTE: 5. Invert MSB with external inverter to obtain Two’s Complement Coding. HI-565A |
Số phần tương tự - HI-565A_02 |
|
Mô tả tương tự - HI-565A_02 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |