AD4851
新規設計に推奨Buffered, 4-Channel Simultaneous Sampling, 16-Bit 250kSPS DAS
- 製品モデル
- 2
- 1Ku当たりの価格
- 最低価格：$20.26
製品の詳細
- Complete 16-bit data acquisition system
- Simultaneous sampling of 4 internally buffered channels
- 250kSPS per channel throughput
- Differential, wide common-mode range inputs
- ±75pA typical input leakage at 25°C
- Full-scale input step settling time < 300ns
- Integrated reference and reference buffer (4.096V)
- Integrated supply decoupling capacitors
- 36mW per channel at 250kSPS, scales with throughput
- Minimal external signal conditioning
- Seamless high dynamic range
- Per sample, per channel automatic gain ranging
- Maintains ppm-level INL
- Per channel SoftSpan input ranges, bipolar or unipolar
- ±40V, ±25V, ±20V, ±12.5V, ±10V, ±6.25V, ±5V, ±2.5V
- 0V to 40V, 25V, 20V, 12.5V, 10V, 6.25V, 5V, 2.5V
- Rail-to-rail input overdrive tolerance
- High performance
- INL: ±160μV typical (±40V range)
- SNR: 94.6dB single-conversion typical (±40V range)
- DR: 98.1dB single-conversion typical (±40V range)
- THD: −117dB typical (±40V range)
- CMRR: 120dB typical
- Digital flexibility
- SPI CMOS (0.9V to 5.25V) and LVDS serial input and output
- Optional oversampling with 16-bit digital averaging
- Optional offset, gain, and phase correction
- 7.00mm × 7.00mm, 64-ball BGA full solution footprint
The AD4851 is a fully buffered, 4-channel simultaneous sampling, 16-bit, 250kSPS data acquisition system (DAS) with differential, wide common-mode range inputs. Its functional architecture is shown in Figure 1. Operating from a 5V low voltage supply, flexible input buffer supplies, and using the precision low drift internal reference and reference buffer, the AD4851 allows the SoftSpan range of each channel to be independently configured to match the application signal swing, minimizing additional external signal conditioning. To further maximize single-conversion dynamic range, the AD4851 incorporates seamless high dynamic range (SHDR) technology. When enabled, the input signal path gain of the channel is automatically optimized on a sample-by-sample basis, minimizing converter noise on each sample without impacting linearity.
The 11MHz bandwidth, picoamp input analog buffers, wide input common-mode range, and 120dB common-mode rejection ratio (CMRR) of the AD4851 allow the DAS to directly digitize input signals with arbitrary swings on INx+ and INx−. Its input signal flexibility, combined with ±160μV integral nonlinearity (INL), no missing codes at 16 bits, 94.6dB signal to noise ratio (SNR), and 98.1dB dynamic range, make the AD4851 an ideal choice for applications requiring high accuracy, throughput, and precision in a compact solution footprint. Enabling 16-bit oversampling offers further SNR and dynamic range improvements. Optional per channel offset, gain, and phase adjustment provide the ability to calibrate and remove system-level errors upstream to the DAS.
The AD4851 features a serial peripheral interface (SPI) register configuration bus (0.9V to 5.25V) and supports both low voltage differential signaling buses (LVDS) and complementary metal-oxide semiconductor (CMOS) conversion data output buses, selectable using the LVDS/CMOS pin. Between one and four lines of data output can be employed in CMOS mode, allowing the user to optimize bus width and throughput.
The 7.00mm × 7.00mm, 64-ball, ball grid array (BGA) of the AD4851 includes all critical power supply and reference bypass capacitors, minimizing full solution footprint and component count and reducing sensitivity to application printed circuit board (PCB) layout. The device operates over an extended industrial temperature range of −40°C to +125°C.
Note that throughout this data sheet, multifunction pins such as LVDS/CMOS are referred to either by the entire pin name or by a single function of the pin. For example, LVDS when only that function is relevant.
APPLICATIONS
- Automatic test equipment
- Avionics and aerospace
- Instrumentation and control systems
- Semiconductor manufacturing
- Test and measurement
ドキュメント
データシート 1
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| 製品モデル | ピン／パッケージ図 | 資料 | CADシンボル、フットプリント、および3Dモデル |
|---|---|---|---|
| AD4851BBCZ | 64-Lead BGA (7 mm x 7 mm x 1.42 mm) | ||
| AD4851BBCZ-RL-13 | CHIP SCALE BGA |
これは最新改訂バージョンのデータシートです。
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Precision Toolbox for MATLAB
The Precision Toolbox is an evaluation software, made available in MATLAB, that allows configuring and capturing data with ADI’s precision data converters. To get started evaluating with the Precision Toolbox:
Step 1: Setup the evaluation hardware as described in the hardware setup guide.
Step 2: Install the Precision Toolbox and its dependencies. Refer to the Precision Toolbox wiki.
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| 製品モデル | 製品ライフサイクル | 詳細 |
|---|---|---|
| シリーズ電圧リファレンス 2 | ||
| LTC6655 | 製造中 | ノイズが0.25ppmの低ドリフト高精度リファレンス |
| ADR4540 | 製造中 | 4.096V電圧リファレンス、超低ノイズ、高精度 |
| パワー・スイッチ内蔵型昇圧レギュレータ 2 | ||
| LT8330 | 新規設計に推奨 | 1A、60Vスイッチを内蔵した低静止電流の昇圧/SEPIC/反転コンバータ |
| ADP5070 | 新規設計に推奨 | DC/DCスイッチング・レギュレータ、1 A/0.6 A、独立した正と負の出力 |
| 正電圧のリニア電圧レギュレータ（LDO） 3 | ||
| LT1761 | 新規設計に推奨 | SOT-23の100mA、低ノイズ、低損失マイクロパワー・レギュレータ |
| ADP150 | 製造中 | リニア・レギュレータ、150mA、超低ノイズ、CMOS |
| ADP151 | 製造中 | 超低ノイズ、200mA、CMOSリニア電圧レギュレータ |
ツールおよびシミュレーション
LTspice 1
設計ツール 1
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LTspice®は、無料で提供される強力で高速な回路シミュレータと回路図入力、波形ビューワに改善を加え、アナログ回路のシミュレーションを容易にするためのモデルを搭載しています。
評価用キット
AD4857（バッファ付き、8チャンネル同時サンプリング、16ビット、1MSPS DAS）の性能評価
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